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Siemens 3RV2342-4KC10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2342-4KC10 SIRIUS Circuit Breaker, 50 kA at 400 V

MPN3RV2342-4KC10
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Siemens SIRIUS 3RV2342-4KC10 circuit breaker for starter combinations, screw and snap-on mounting onto 35 mm DIN rail per EN 60715, 50 kA at 400 V AC, 176 x 70 x 165 mm.

Siemens 3RV2342-4KC10 datasheet (PDF)
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

3RV2342-4KC10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS3
3RV2342-4KC10 — Electrical
ParameterValue
Rated operational current (Ie)75 A
Rated voltage20 ... 690 V
Rated voltage, AC-3 (max.)690 V
Rated frequency50 ... 60 Hz
Rated insulation voltage (Ui), pollution degree 31 000 V
Rated impulse withstand voltage (Uimp)8 kV
Number of poles3
Power loss (AC, hot)38 W
Power loss, per pole (AC, hot)12.7 W
3RV2342-4KC10 — Protection & Tripping
ParameterValue
Instantaneous short-circuit trip current975 A
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
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V3 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionNo
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2342-4KC10 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)25 000
Endurance, auxiliary contacts (typ.)25 000
Switching frequency, AC-3 (max.)15 1/h
3RV2342-4KC10 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (2,5 ... 50 mm²), 1x (10 ... 70 mm²)
Conductor cross-section, finely stranded with ferrule2x (2.5 ... 35 mm²), 1x (2.5 ... 50 mm²)
3RV2342-4KC10 — Mechanical
ParameterValue
Height165 mm
Width70 mm
Depth176 mm
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
Mounting positionany
3RV2342-4KC10 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Relative humidity (operation)10 ... 95 %
Max. installation altitude2 000 m
3RV2342-4KC10 — Specifications
ParameterValue
Design Of The ProductFor starter combinations

Product details

What this breaker does in a motor branch

At 240 V AC it's rated 100 kA, so in lower-voltage North American panels the fault-clearing headroom is even wider.

Motor horsepower coverage across common voltages

This breaker covers a broad motor horsepower range depending on line voltage: 7.5 hp at 110/120 V, 15 hp at 230 V, 30 hp at 220/230 V, 60 hp at 460/480 V, and 75 hp at 575/600 V. That 75 A continuous rating at 600 V lines up with the 75 hp motor curve at that voltage.

Physical fit: 176 mm deep, 70 mm wide, 165 mm tall. The screw-type terminals accept 2x (2.5 to 16 mm²) solid or stranded on the main circuit, and up to 2x (2.5 to 50 mm²) or 1x (10 to 70 mm²) on the line/load side. No ground-fault or phase-failure detection built in — that's handled by the upstream supply or a separate module.

Frequently asked questions

What is the breaking capacity of 3RV2342-4KC10 at 400 V?

At 400 V AC the 3RV2342-4KC10 is rated 50 kA. At 240 V AC it's rated 100 kA, and at 690 V AC it's rated 3 kA.

Will the 3RV2342-4KC10 drop into a panel designed for 3RV2021-4NA25?

The 3RV2342-4KC10 shares the same 35 mm DIN rail mounting standard and similar screw-terminal topology, but the 3RV2021-4NA25 is a different frame size in the SIRIUS family. Verify the 70 mm width and 176 mm depth against your panel's cutout and clearance — the 3RV2342-4KC10 requires 150 mm free space above and below, which may differ from the 3RV2021 frame.

Where can I buy the 3RV2342-4KC10 and how is it quoted?

The 3RV2342-4KC10 is sourced to order against an RFQ through independent distribution. Submit a request with quantity and target delivery window; we return a firm price and lead time at quote.

MPN
3RV2342-4KC10