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Siemens 3RV2742-5GD10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2742-5GD10 SIRIUS Circuit Breaker, 40 A, 50 kA at

MPN3RV2742-5GD10
Active

Siemens SIRIUS circuit breaker, size S3, 40 A rated operational current, 50 kA breaking capacity at 400 V AC, for system protection per UL 489/CSA C22.2 No. 5, screw and snap-on 35 mm DIN rail mount.

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

Specifications

3RV2742-5GD10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS3
3RV2742-5GD10 — Electrical
ParameterValue
Rated operational current (Ie)40 A
Rated voltage20 ... 600 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)18 W
Power loss, per pole (AC, hot)6 W
3RV2742-5GD10 — Protection & Tripping
ParameterValue
Instantaneous short-circuit trip current520 A
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)100 kA
Breaking capacity at 240 V100 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionNo
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2742-5GD10 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)25 000
Endurance, auxiliary contacts (typ.)25 000
3RV2742-5GD10 — 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)
Conductor range, AWG (main contacts)8
3RV2742-5GD10 — Mechanical
ParameterValue
Height170 mm
Width70 mm
Depth176 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Mounting positionany
3RV2742-5GD10 — 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
3RV2742-5GD10 — Specifications
ParameterValue
Design Of The ProductFor system protection according to UL 489/CSA C22.2 No. 5

Product details

Integrator note: 3RV2742-5GD10

The Siemens 3RV2742-5GD10 is a SIRIUS size S3 circuit breaker rated 40 A operational current with a 50 kA breaking capacity at 400 V AC (100 kA at 240 V AC). The thermal-magnetic overload release (thermal for overload, magnetic for short-circuit) provides motor and feeder protection. The 50/60 Hz rated frequency matches standard industrial line supplies.

Compliance documentation includes RoHS substance prohibition date 03/01/2017.

Main circuit terminals are screw-type, accepting 2x (2.5... 16 mm²) solid or 1x (10... 70 mm²) stranded. The screwdriver shaft requires a 4 mm hexagonal socket tip. Auxiliary contact terminals accept 2x (2.5... 16 mm²) solid. AWG 8 cables are accepted for main contacts.

Operates at -20 to +60 °C, stores/transports at -50 to +80 °C. Relative humidity during operation: 10 to 95 %. Electrical endurance: 25,000 typical cycles for main and auxiliary contacts. Power dissipation at AC in hot state: 18 W.

Frequently asked questions

Where can I buy 3RV2742-5GD10 and get a price?

It is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What is the depth of 3RV2742-5GD10?

176 mm depth, 70 mm width, 170 mm height.

What compliance documentation does 3RV2742-5GD10 have?

RoHS compliant (substance prohibition date 03/01/2017), UL 489 and CSA C22.2 No. 5 approved for system protection.

MPN
3RV2742-5GD10