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Siemens 3RV1042-4MA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1042-4MA10 SIRIUS Motor Protection Circuit Breake

MPN3RV1042-4MA10

Siemens SIRIUS motor protection circuit breaker, 3RV1042-4MA10, 100 A rated continuous current, 45 kW at 400 V, Trip Class 10, 100 kA breaking capacity at 400 V, screw terminals, DIN rail mount.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RV1042-4MA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1042-4MA10 — 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)44 W
Power loss, per pole (AC, hot)14.7 W
3RV1042-4MA10 — Protection & Tripping
ParameterValue
Overload release setting range80 ... 100 A
Trip classCLASS 10
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)100 kA
Breaking capacity at 500 V (AC)10 kA
Breaking capacity at 690 V (AC)6 kA
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV1042-4MA10 — Endurance & Switching
ParameterValue
Auxiliary CO (changeover) contacts0
3RV1042-4MA10 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals with box terminals
Main-circuit connector arrangementfront side
Conductor cross-section, finely stranded with ferrule2x (2.5 ... 35 mm²), 2.5 ... 50 mm²
Conductor range, AWG (main contacts)2x (10 ... 1), 1x (10 ... 2)
3RV1042-4MA10 — Mechanical
ParameterValue
Height165 mm
Width70 mm
Depth174 mm
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Mounting positionany
3RV1042-4MA10 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1042-4MA10 — Specifications
ParameterValue
Design Of The Productfor motor protection

Product details

The Siemens SIRIUS 3RV1042-4MA10 is a motor protection circuit breaker rated for 100 A continuous current and 45 kW at 400 V. Trip Class 10 ensures the breaker trips within 10 seconds at 7.2× rated current, matching standard motor start profiles for pumps, fans, and compressors. Screw-type box terminals for the main circuit accept solid 2x (2.5 … 16 mm²) or stranded 2x (10 … 50 mm²), covering most motor feeder sizes up to 70 mm² single. Mounts via screw and snap-on onto 35 mm DIN rail per EN 50022, with 0 mm clearance needed at the sides or rear — tight panel layouts are fine.

Integration notes

The 3RV1042-4MA10 occupies 70 mm width on the DIN rail, with 174 mm depth and 165 mm height. Any mounting position — horizontal or vertical — works, but derate the 44 W power dissipation if enclosed without airflow. The auxiliary switch slot accepts standard SIRIUS blocks for remote status.

Frequently asked questions

What is the breaking capacity of 3RV1042-4MA10 at 400 V?

100 kA at 400 V AC. At 690 V it drops to 6 kA, so verify the available fault current at your service voltage.

Will 3RV1042-4MA10 drop into a panel specified for 3RV6021-4DA10 without rewiring?

Both are SIRIUS motor protection breakers on the same 35 mm DIN rail footprint, but terminal ratings differ. The 3RV1042-4MA10 uses screw-type box terminals for the main circuit; the 3RV6021-4DA10 may have different lug sizes. Check the conductor cross-section range against your existing wiring before swapping.

What compliance documentation does Siemens provide for 3RV1042-4MA10?

The part carries a RoHS substance prohibition date of 07/01/2006, confirming compliance with EU RoHS. Standard Siemens documentation includes the CE declaration and IEC/EN 60947-2 test certificates; request them with your RFQ.

Where can I buy 3RV1042-4MA10 and how is it quoted?

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 offer.

MPN
3RV1042-4MA10