BOM / RFQ

Siemens 3RA1125-1BL16-4BB4

MPN3RA1125-1BL16-4BB4

Load feeder fuseless direct-on-line starting, 400 V AC 1.4...2 A, 24 V DC Size S00 1 NO + 1 NC (circuit breaker) 2 NC+2 NO (contactor),Screw terminal With slide adapter Type of coordination 2, Iq = 50 kA Circuit breaker S0!!! Phased-out product!!! Successor is SIRIUS 3RA2

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Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RA1125-1BL16-4BB4 — Identification
Parameter	Value
Product designation	non-fused load feeder
Main circuit poles	3
Brand	SIRIUS
Load feeder size	S0
Product design / construction	direct starter
Included contactor (type)	3RT1016-1BB44
Included circuit-breaker (type)	3RV1021-1BA15
Included link module (type)	3RA1921-1AA00
Reference designation (IEC 81346-2)	Q

3RA1125-1BL16-4BB4 — Ratings & Performance
Parameter	Value
Rated motor power at 400 V	0.75 kW
Operational current Ie, AC-3 at 400 V	1.9 A
Rated impulse withstand voltage (Uimp)	6 kV
Mechanical service life, typ. (switching cycles)	10 000 000

3RA1125-1BL16-4BB4 — Protection & Tripping
Parameter	Value
Short-circuit protection	Yes
Overload release setting range (current)	1.4 ... 2 A
Duty / utilization type (IEC 60947-6-2)	1

3RA1125-1BL16-4BB4 — Contacts & Control
Parameter	Value
Control supply voltage type	DC
Auxiliary contacts, NO	3
Auxiliary contacts, NC	3
Auxiliary switch extension	Yes
Switching contact type	electromechanical

3RA1125-1BL16-4BB4 — Communication
Parameter	Value
AS-Interface protocol support	No

3RA1125-1BL16-4BB4 — Mechanical & Connection
Parameter	Value
Main circuit connection type	screw-type terminals
Mounting / fastening method	snap-on mounting
Mounting position	with vertical mounting surface +/-90° rotatable, with vertical mounting surface +/- 22.5° tiltable to the front and back
Width	45 mm
Height	205 mm
Depth	154 mm