![[Mitsubishi Electric] - BD-T21 Main Circuit NC Magnetic Contactor (DC Operated, 25A Ith, 2a2b Aux)](https://img.prosourcemro.com/2026/08/Mstn-photo-b-t21-1.png)
Magnetic Contactors
MITSUBISHI ELECTRIC
[Mitsubishi Electric] - BD-T21 Main Circuit NC Magnetic Contactor (DC Operated, 25A Ith, 2a2b Aux)
Family ID: MEL-BD-T21
Mitsubishi Electric MS-T/N series BD-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. DC operated coil, main contact configuration 1a2b, 2a2b twin auxiliary contacts rated down to 20V 5mA. Open thermal current 25A, coil power consumption 3.3W (2.2W for DC12V and DC24V coils). 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.
8 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| BD-T21 DC12V | BD-T21 NC main contact contactor, DC12V coil, 1a2b main contacts | Mitsubishi Electric | Type: Main circuit NC (b-contact) magnetic contactor · Frame: BD-T21 · Operation: DC operated · Main Contact: 1a2b · Coil Designation: DC12V · Coil Rating: DC12V · Aux Contact: 2a2b · DC Rated Current DC2 DC4 Class: 8A at DC100-110V, 1A at DC200-220V · DC Rated Current DC1 Class: 15A at DC100-110V, 5A 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: 3.3W (2.2W for DC12V and DC24V coils) · 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 | ||
| BD-T21 DC24V | BD-T21 NC main contact contactor, DC24V coil, 1a2b main contacts | Mitsubishi Electric | Type: Main circuit NC (b-contact) magnetic contactor · Frame: BD-T21 · Operation: DC operated · Main Contact: 1a2b · Coil Designation: DC24V · Coil Rating: DC24V · Aux Contact: 2a2b · DC Rated Current DC2 DC4 Class: 8A at DC100-110V, 1A at DC200-220V · DC Rated Current DC1 Class: 15A at DC100-110V, 5A 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: 3.3W (2.2W for DC12V and DC24V coils) · 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 | ||
| BD-T21 DC48V | BD-T21 NC main contact contactor, DC48V coil, 1a2b main contacts | Mitsubishi Electric | Type: Main circuit NC (b-contact) magnetic contactor · Frame: BD-T21 · Operation: DC operated · Main Contact: 1a2b · Coil Designation: DC48V · Coil Rating: DC48V · Aux Contact: 2a2b · DC Rated Current DC2 DC4 Class: 8A at DC100-110V, 1A at DC200-220V · DC Rated Current DC1 Class: 15A at DC100-110V, 5A 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: 3.3W (2.2W for DC12V and DC24V coils) · 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 | ||
| BD-T21 DC100V | BD-T21 NC main contact contactor, DC100V coil, 1a2b main contacts | Mitsubishi Electric | Type: Main circuit NC (b-contact) magnetic contactor · Frame: BD-T21 · Operation: DC operated · Main Contact: 1a2b · Coil Designation: DC100V · Coil Rating: DC100V · Aux Contact: 2a2b · DC Rated Current DC2 DC4 Class: 8A at DC100-110V, 1A at DC200-220V · DC Rated Current DC1 Class: 15A at DC100-110V, 5A 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: 3.3W (2.2W for DC12V and DC24V coils) · 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 | ||
| BD-T21 DC110V | BD-T21 NC main contact contactor, DC110V coil, 1a2b main contacts | Mitsubishi Electric | Type: Main circuit NC (b-contact) magnetic contactor · Frame: BD-T21 · Operation: DC operated · Main Contact: 1a2b · Coil Designation: DC110V · Coil Rating: DC110V · Aux Contact: 2a2b · DC Rated Current DC2 DC4 Class: 8A at DC100-110V, 1A at DC200-220V · DC Rated Current DC1 Class: 15A at DC100-110V, 5A 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: 3.3W (2.2W for DC12V and DC24V coils) · 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 | ||
| BD-T21 DC125V | BD-T21 NC main contact contactor, DC125V coil, 1a2b main contacts | Mitsubishi Electric | Type: Main circuit NC (b-contact) magnetic contactor · Frame: BD-T21 · Operation: DC operated · Main Contact: 1a2b · Coil Designation: DC125V · Coil Rating: DC120-125V · Aux Contact: 2a2b · DC Rated Current DC2 DC4 Class: 8A at DC100-110V, 1A at DC200-220V · DC Rated Current DC1 Class: 15A at DC100-110V, 5A 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: 3.3W (2.2W for DC12V and DC24V coils) · 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 | ||
| BD-T21 DC200V | BD-T21 NC main contact contactor, DC200V coil, 1a2b main contacts | Mitsubishi Electric | Type: Main circuit NC (b-contact) magnetic contactor · Frame: BD-T21 · Operation: DC operated · Main Contact: 1a2b · Coil Designation: DC200V · Coil Rating: DC200V · Aux Contact: 2a2b · DC Rated Current DC2 DC4 Class: 8A at DC100-110V, 1A at DC200-220V · DC Rated Current DC1 Class: 15A at DC100-110V, 5A 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: 3.3W (2.2W for DC12V and DC24V coils) · 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 | ||
| BD-T21 DC220V | BD-T21 NC main contact contactor, DC220V coil, 1a2b main contacts | Mitsubishi Electric | Type: Main circuit NC (b-contact) magnetic contactor · Frame: BD-T21 · Operation: DC operated · Main Contact: 1a2b · Coil Designation: DC220V · Coil Rating: DC220V · Aux Contact: 2a2b · DC Rated Current DC2 DC4 Class: 8A at DC100-110V, 1A at DC200-220V · DC Rated Current DC1 Class: 15A at DC100-110V, 5A 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: 3.3W (2.2W for DC12V and DC24V coils) · 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 |
