Mitsubishi Electric - B-T21 Main Circuit NC Magnetic Contactor (AC Operated, 25A Ith, 2a2b Aux)

Mitsubishi Electric MS-T/N series B-T21 magnetic contactor with normally closed b-contact main circuit, for DC motor starting resistor short-circuiting, AC motor slow-start duty, dynamic braking and AC or DC source changeover in lighting circuits.

Key features

AC operated coil, main contact configuration 1a2b standard and 3b optional, 2a2b twin auxiliary contacts rated down to 20V 5mA
Open thermal current 25A, coil power consumption 2.4W
Phase barriers fitted as standard on the main circuit; a charged-part protection cover is standard equipment on the T21 frame
Mechanical durability 5,000,000 operations, electrical durability 500,000 operations at 1200 operations per hour
Compliant with JIS C8201-4-1, JEM1038 and JIS C8201-5-1

Specifications

Type	Main circuit NC (b-contact) magnetic contactor
Frame	B-T21
Operation	AC operated
Aux Contact	2a2b
DC Rated Current DC2 DC4 Class	8A (15A) at DC100-110V, 1A (5A) at DC200-220V
DC Rated Current DC1 Class	15A (20A) at DC100-110V, 5A (10A) at DC200-220V
AC Rated Current	18A at 200-220V, 13A at 380-440V (3-phase b-contact)
Open Thermal Current Ith	25A
Coil Power Consumption	2.4W
Coil Inrush	75VA
Coil Sealed Input	7VA
Switching Frequency	1200 operations/h

B-T21 AC24V		B-T21 NC main contact contactor, AC24V coil, 1a2b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 1a2b \| Coil Designation: AC24V \| Coil Rating: 24V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
B-T21 AC24V 3B		B-T21 NC main contact contactor, AC24V coil, 3b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 3b \| Coil Designation: AC24V \| Coil Rating: 24V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
B-T21 AC48V		B-T21 NC main contact contactor, AC48V coil, 1a2b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 1a2b \| Coil Designation: AC48V \| Coil Rating: 48-50V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
B-T21 AC48V 3B		B-T21 NC main contact contactor, AC48V coil, 3b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 3b \| Coil Designation: AC48V \| Coil Rating: 48-50V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
B-T21 AC100V		B-T21 NC main contact contactor, AC100V coil, 1a2b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 1a2b \| Coil Designation: AC100V \| Coil Rating: 100-127V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
B-T21 AC100V 3B		B-T21 NC main contact contactor, AC100V coil, 3b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 3b \| Coil Designation: AC100V \| Coil Rating: 100-127V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
B-T21 AC200V		B-T21 NC main contact contactor, AC200V coil, 1a2b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 1a2b \| Coil Designation: AC200V \| Coil Rating: 200-240V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
B-T21 AC200V 3B		B-T21 NC main contact contactor, AC200V coil, 3b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 3b \| Coil Designation: AC200V \| Coil Rating: 200-240V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
B-T21 AC300V		B-T21 NC main contact contactor, AC300V coil, 1a2b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 1a2b \| Coil Designation: AC300V \| Coil Rating: 260-300V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
B-T21 AC300V 3B		B-T21 NC main contact contactor, AC300V coil, 3b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 3b \| Coil Designation: AC300V \| Coil Rating: 260-300V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
B-T21 AC400V		B-T21 NC main contact contactor, AC400V coil, 1a2b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 1a2b \| Coil Designation: AC400V \| Coil Rating: 380-440V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
B-T21 AC400V 3B		B-T21 NC main contact contactor, AC400V coil, 3b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 3b \| Coil Designation: AC400V \| Coil Rating: 380-440V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
B-T21 AC500V		B-T21 NC main contact contactor, AC500V coil, 1a2b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 1a2b \| Coil Designation: AC500V \| Coil Rating: 460-550V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
B-T21 AC500V 3B		B-T21 NC main contact contactor, AC500V coil, 3b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 3b \| Coil Designation: AC500V \| Coil Rating: 460-550V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1

Magnetic ContactorsMitsubishi Electric

14 product codes available in this family

Sourced direct from KoreaExport-ready supplyCompetitive pricing

RFQ List 0 Email about this

Need a different model, or a part not listed here? Send us your parts list →

Mitsubishi Electric - B-T21 Main Circuit NC Magnetic Contactor (AC Operated, 25A Ith, 2a2b Aux)

Brand Mitsubishi Electric·Magnetic Contactors

Available part numbers (14)

B-T21 AC24V, B-T21 AC24V 3B, B-T21 AC48V, B-T21 AC48V 3B, B-T21 AC100V, B-T21 AC100V 3B, B-T21 AC200V, B-T21 AC200V 3B, B-T21 AC300V, B-T21 AC300V 3B + 4 more — see full table ↓

How to order

Send the Mitsubishi Electric part numbers and quantities through our RFQ form or to info@prosourcemro.com. We confirm price, availability and lead time within 1 business day — no account needed.

RFQ List 0 →

View full details

Product codes & specifications

0 selected

RFQ List (0)

	Product code	Spec
	B-T21 AC24V	B-T21 NC main contact contactor, AC24V coil, 1a2b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 1a2b \| Coil Designation: AC24V \| Coil Rating: 24V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
	B-T21 AC24V 3B	B-T21 NC main contact contactor, AC24V coil, 3b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 3b \| Coil Designation: AC24V \| Coil Rating: 24V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
	B-T21 AC48V	B-T21 NC main contact contactor, AC48V coil, 1a2b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 1a2b \| Coil Designation: AC48V \| Coil Rating: 48-50V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
	B-T21 AC48V 3B	B-T21 NC main contact contactor, AC48V coil, 3b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 3b \| Coil Designation: AC48V \| Coil Rating: 48-50V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
	B-T21 AC100V	B-T21 NC main contact contactor, AC100V coil, 1a2b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 1a2b \| Coil Designation: AC100V \| Coil Rating: 100-127V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
	B-T21 AC100V 3B	B-T21 NC main contact contactor, AC100V coil, 3b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 3b \| Coil Designation: AC100V \| Coil Rating: 100-127V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
	B-T21 AC200V	B-T21 NC main contact contactor, AC200V coil, 1a2b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 1a2b \| Coil Designation: AC200V \| Coil Rating: 200-240V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
	B-T21 AC200V 3B	B-T21 NC main contact contactor, AC200V coil, 3b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 3b \| Coil Designation: AC200V \| Coil Rating: 200-240V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
	B-T21 AC300V	B-T21 NC main contact contactor, AC300V coil, 1a2b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 1a2b \| Coil Designation: AC300V \| Coil Rating: 260-300V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
	B-T21 AC300V 3B	B-T21 NC main contact contactor, AC300V coil, 3b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 3b \| Coil Designation: AC300V \| Coil Rating: 260-300V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
	B-T21 AC400V	B-T21 NC main contact contactor, AC400V coil, 1a2b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 1a2b \| Coil Designation: AC400V \| Coil Rating: 380-440V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
	B-T21 AC400V 3B	B-T21 NC main contact contactor, AC400V coil, 3b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 3b \| Coil Designation: AC400V \| Coil Rating: 380-440V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
	B-T21 AC500V	B-T21 NC main contact contactor, AC500V coil, 1a2b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 1a2b \| Coil Designation: AC500V \| Coil Rating: 460-550V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1
	B-T21 AC500V 3B	B-T21 NC main contact contactor, AC500V coil, 3b main contacts \| Type: Main circuit NC (b-contact) magnetic contactor \| Frame: B-T21 \| Operation: AC operated \| Main Contact: 3b \| Coil Designation: AC500V \| Coil Rating: 460-550V 50/60Hz \| Aux Contact: 2a2b \| DC Rated Current DC2 DC4 Class: 8A (15A) at DC100-110V, 1A (5A) at DC200-220V \| DC Rated Current DC1 Class: 15A (20A) at DC100-110V, 5A (10A) at DC200-220V \| AC Rated Current: 18A at 200-220V, 13A at 380-440V (3-phase b-contact) \| Open Thermal Current Ith: 25A \| Coil Power Consumption: 2.4W \| Coil Inrush: 75VA \| Coil Sealed Input: 7VA \| Switching Frequency: 1200 operations/h \| Durability: Mechanical 5,000,000 operations, Electrical 500,000 operations \| Standards: JIS C8201-4-1, JEM1038, JIS C8201-5-1

Need a different model, or a part not listed here? Send us your parts list →

Related products

All Circuit Breakers & Contactors →

Item added to your cart

Mitsubishi Electric - B-T21 Main Circuit NC Magnetic Contactor (AC Operated, 25A Ith, 2a2b Aux)