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Siemens 3RV1041-4KA15 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1041-4KA15 SIRIUS Motor Protection Circuit Breake

MPN3RV1041-4KA15

Siemens SIRIUS 3RV1041-4KA15, motor protection circuit breaker, 75 A continuous, 37 kW at 400 V, CLASS 10, screw terminals, IP20 front, 70 x 165 x 174 mm.

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

Specifications

3RV1041-4KA15 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1041-4KA15 — Electrical
ParameterValue
Rated voltage690 V
Rated voltage, AC-3 (max.)690 V
Rated impulse withstand voltage (Uimp)6 000 V
Number of poles3
Power loss (AC, hot)38 W
Power loss, per pole (AC, hot)12.7 W
3RV1041-4KA15 — Protection & Tripping
ParameterValue
Overload release setting range57 ... 75 A
Trip classCLASS 10
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)50 kA
Breaking capacity at 500 V (AC)8 kA
Breaking capacity at 690 V (AC)5 kA
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV1041-4KA15 — Endurance & Switching
ParameterValue
Auxiliary CO (changeover) contacts0
3RV1041-4KA15 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals with box terminals
Main-circuit connector arrangementfront side
Conductor cross-section, finely stranded with ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor range, AWG (main contacts)2x (10 ... 1), 1x (10 ... 2)
3RV1041-4KA15 — Mechanical
ParameterValue
Height165 mm
Width70 mm
Depth174 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 50022
Mounting positionany
3RV1041-4KA15 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1041-4KA15 — Specifications
ParameterValue
Design Of The Productfor motor protection

Product details

The Siemens 3RV1041-4KA15 is a SIRIUS motor protection circuit breaker rated for 75 A continuous current, delivering 37 kW at 400 V AC-3.

Short-Circuit Ratings and Coordination

The interrupting capacity is 100 kA at 240 V AC, 50 kA at 400 V AC, 8 kA at 500 V AC, and 5 kA at 690 V AC (–). That gives headroom for most panel designs without needing a current-limiting upstream fuse.

Mounting position is any orientation. IP20 on the front face means finger-safe from the front but not sealed — keep it inside a locked enclosure, not on a washdown floor.

Main circuit terminals accept solid conductors: 2x (0.5–1.5 mm²) and 2x (0.75–2.5 mm²). Stranded main conductors: 2x (10–50 mm²) or 1x (10–70 mm²). AWG equivalents for main contacts: 2x (10–1) or 1x (10–2). Auxiliary and control circuit terminals are screw-type. The auxiliary switch is transverse design and field-installable. That's another SKU I don't need to pre-order — the base breaker ships ready for the add-on block.

Frequently asked questions

Where can I buy 3RV1041-4KA15 and get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm quote.

What is the closest functional second-source to 3RV1041-4KA15?

The 3RV2021-4NA25 is a peer in the SIRIUS family but it's a different generation (3RV2 vs 3RV1). The 3RV1041-4KA15 has a 75 A continuous rating and 37 kW at 400 V; the 3RV2021-4NA25 has different ratings. They share the same DIN-rail footprint and screw-terminal format, but verify the trip curve and SCCR for your specific application before swapping — the interrupting capacities differ across the voltage range.

What is 3RV1041-4KA15's depth?

The depth is 174 mm. That's the dimension from the DIN-rail mounting surface to the front of the breaker body — critical for enclosure depth clearance.

What solid conductor sizes does 3RV1041-4KA15 accept?

The main circuit terminals accept solid conductors in two configurations: 2x (0.5–1.5 mm²) and 2x (0.75–2.5 mm²). Stranded conductors go up to 2x (10–50 mm²) or 1x (10–70 mm²).

Will 3RV1041-4KA15 drop into a panel specified around 3RV2021-4NA25 without rewiring?

Both mount on 35 mm DIN rail and use screw-type terminals, so the mechanical fit and terminal format are the same. However, the 3RV1041-4KA15 has a 75 A rating versus the 3RV2021-4NA25's rating — verify the load current and SCCR at your system voltage. The terminal wire ranges overlap but check your specific conductor sizes against the 3RV1041-4KA15's acceptance ranges.

MPN
3RV1041-4KA15