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Siemens 3RV1421-4AA10-0FJ0-ZX95 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1421-4AA10-0FJ0-ZX95 SIRIUS Circuit Breaker, 16 A

MPN3RV1421-4AA10-0FJ0-ZX95

Siemens SIRIUS circuit breaker for transformer protection, 3RV1421-4AA10-0FJ0-ZX95, 16 A continuous, CLASS 10 trip, 50 kA breaking capacity at 400 V AC, screw terminals, IP20 front, DIN rail mount.

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

Specifications

3RV1421-4AA10-0FJ0-ZX95 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1421-4AA10-0FJ0-ZX95 — 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)9.25 W
Power loss, per pole (AC, hot)3.1 W
3RV1421-4AA10-0FJ0-ZX95 — Protection & Tripping
ParameterValue
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)10 kA
Breaking capacity at 690 V (AC)4 kA
Phase-failure detectionYes
Ground-fault detectionNo
3RV1421-4AA10-0FJ0-ZX95 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)100 000
Switching frequency, AC-3 (max.)15 1/h
3RV1421-4AA10-0FJ0-ZX95 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementfront side
Conductor cross-section, finely stranded with ferrule2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)
3RV1421-4AA10-0FJ0-ZX95 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth96 mm
Mounting positionany
3RV1421-4AA10-0FJ0-ZX95 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
3RV1421-4AA10-0FJ0-ZX95 — Specifications
ParameterValue
Design Of The Productfor transformer protection

Product details

Rated 16 A continuous, it carries a CLASS 10 trip class, so it will disconnect within 10 seconds at 7.2× the current setting, matching the thermal withstand of standard transformers and motor starters.

Breaking capacity is voltage-dependent: 100 kA at 240 V AC, 50 kA at 400 V AC, 10 kA at 500 V AC, and 4 kA at 690 V AC. Rated impulse withstand voltage is 6 kV, and surge voltage resistance is rated at 6 000 V, covering installation category III environments.

Shock-rated to 25 g for 11 ms, so it survives the vibration on a compressor skid or a conveyor drive. Maximum switching rate is 15 operations per hour under AC-3 duty. Mechanical endurance is 100 000 operations typical.

Frequently asked questions

What is the breaking capacity of 3RV1421-4AA10-0FJ0-ZX95 at 400 V?

At 400 V AC, the breaking capacity is 50 kA. It also carries 100 kA at 240 V, 10 kA at 500 V, and 4 kA at 690 V.

Where can I buy 3RV1421-4AA10-0FJ0-ZX95?

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

Does 3RV1421-4AA10-0FJ0-ZX95 have phase failure detection?

Yes, phase failure detection is built in. It will trip on a lost phase, protecting transformers and motors from single-phasing.

What is the trip class of 3RV1421-4AA10-0FJ0-ZX95?

It is CLASS 10, meaning it will trip within 10 seconds at 7.2× the current setting, matching the thermal withstand of standard transformers and motor starters.

MPN
3RV1421-4AA10-0FJ0-ZX95