Siemens SIRIUS 3RF5 DC Solid-State Relays and Contactors 1-Pole

SIRIUS 3RF51 DC solid-state relays and 3RF53 DC solid-state contactors, 1-pole, 22.5 mm, for switching resistive DC loads up to 1 350 V DC.

Key features

Operational voltage 24-1 100 V DC or 24-1 350 V DC
Operational current 15 A to 23 A DC
Instantaneous switching
3RF51 relays for separate heat sink, 3RF53 contactors with optimized heat sink
Control supply voltage 24 V DC or 110 V DC

Specifications

Brand	Siemens
Product line	SIRIUS 3RF5
Category	DC solid-state switching device
Poles	1
Width	22.5 mm
Switching	Instantaneous
Connection	Screw
Catalog chapter	6 - Soft starters and solid-state switching devices
Source	Siemens Catalog IC 10 · 2026, p. 605-606

3RF5125-1BA45		Device: 3RF51 solid-state relay \| Op current DC: 23 A \| Op voltage: 24-1 100 V DC \| Control supply: 24 V DC
3RF5125-1BA65		Device: 3RF51 solid-state relay \| Op current DC: 23 A \| Op voltage: 24-1 100 V DC \| Control supply: 110 V DC
3RF5315-1BA45		Device: 3RF53 solid-state contactor \| Op current DC: 16 A \| Op voltage: 24-1 100 V DC \| Control supply: 24 V DC
3RF5315-1BA65		Device: 3RF53 solid-state contactor \| Op current DC: 16 A \| Op voltage: 24-1 100 V DC \| Control supply: 110 V DC
3RF5325-1BA45		Device: 3RF53 solid-state contactor \| Op current DC: 23 A \| Op voltage: 24-1 100 V DC \| Control supply: 24 V DC
3RF5325-1BA65		Device: 3RF53 solid-state contactor \| Op current DC: 23 A \| Op voltage: 24-1 100 V DC \| Control supply: 110 V DC
3RF5125-1BA47		Device: 3RF51 solid-state relay \| Op current DC: 17 A \| Op voltage: 24-1 350 V DC \| Control supply: 24 V DC
3RF5315-1BA47		Device: 3RF53 solid-state contactor \| Op current DC: 15 A \| Op voltage: 24-1 350 V DC \| Control supply: 24 V DC

Solid-State ContactorsSiemens

8 product codes available in this family

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Siemens SIRIUS 3RF5 DC Solid-State Relays and Contactors 1-Pole

Brand Siemens·Solid-State Contactors

Available part numbers (8)

3RF5125-1BA45, 3RF5125-1BA65, 3RF5315-1BA45, 3RF5315-1BA65, 3RF5325-1BA45, 3RF5325-1BA65, 3RF5125-1BA47, 3RF5315-1BA47

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Product codes & specifications

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RFQ List (0)

	Product code	Spec
	3RF5125-1BA45	Device: 3RF51 solid-state relay \| Op current DC: 23 A \| Op voltage: 24-1 100 V DC \| Control supply: 24 V DC
	3RF5125-1BA65	Device: 3RF51 solid-state relay \| Op current DC: 23 A \| Op voltage: 24-1 100 V DC \| Control supply: 110 V DC
	3RF5315-1BA45	Device: 3RF53 solid-state contactor \| Op current DC: 16 A \| Op voltage: 24-1 100 V DC \| Control supply: 24 V DC
	3RF5315-1BA65	Device: 3RF53 solid-state contactor \| Op current DC: 16 A \| Op voltage: 24-1 100 V DC \| Control supply: 110 V DC
	3RF5325-1BA45	Device: 3RF53 solid-state contactor \| Op current DC: 23 A \| Op voltage: 24-1 100 V DC \| Control supply: 24 V DC
	3RF5325-1BA65	Device: 3RF53 solid-state contactor \| Op current DC: 23 A \| Op voltage: 24-1 100 V DC \| Control supply: 110 V DC
	3RF5125-1BA47	Device: 3RF51 solid-state relay \| Op current DC: 17 A \| Op voltage: 24-1 350 V DC \| Control supply: 24 V DC
	3RF5315-1BA47	Device: 3RF53 solid-state contactor \| Op current DC: 15 A \| Op voltage: 24-1 350 V DC \| Control supply: 24 V DC

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Siemens SIRIUS 3RF5 DC Solid-State Relays and Contactors 1-Pole