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Siemens 3RV1421-1FA10-ZX95 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1421-1FA10-ZX95 SIRIUS Circuit Breaker, 5 A, Clas

MPN3RV1421-1FA10-ZX95

Siemens SIRIUS circuit breaker for transformer protection, 3RV1421-1FA10-ZX95, 5 A rated, Class 10, 100 kA breaking capacity at 400 V AC, screw terminals, IP20 front.

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

Specifications

3RV1421-1FA10-ZX95 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1421-1FA10-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)7.25 W
Power loss, per pole (AC, hot)2.4 W
3RV1421-1FA10-ZX95 — Protection & Tripping
ParameterValue
Overload release setting range3.5 ... 5 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)100 kA
Breaking capacity at 690 V (AC)6 kA
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV1421-1FA10-ZX95 — Endurance & Switching
ParameterValue
Auxiliary CO (changeover) contacts0
3RV1421-1FA10-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)
Conductor range, AWG (main contacts)2x (14 ... 10)
3RV1421-1FA10-ZX95 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth96 mm
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Mounting positionany
3RV1421-1FA10-ZX95 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1421-1FA10-ZX95 — Specifications
ParameterValue
Design Of The Productfor transformer protection

Product details

Rated 5 A continuous with a Class 10 trip characteristic, it gives you a 10-second maximum trip time at 7.2× rated current, which is the standard for protecting motor and transformer circuits where the start-up transient is brief. The 100 kA breaking capacity holds at 240 V, 400 V, and 500 V AC, dropping to 6 kA at 690 V AC — that SCCR headroom means it can sit upstream of smaller branch protectors without needing a current-limiting fuse ahead of it, as long as the available fault current stays under those numbers.

At 45 mm wide, it takes up a single modular slot, so it fits standard distribution boards and motor control centers without crowding. The IP20 front means it's finger-safe for touch protection, but it's intended for inside an enclosure, not washdown areas.

Terminal and wiring

Screw-type terminals on both the main and auxiliary circuits accept solid or stranded copper: 2× (1 … 2.5 mm²) and 2× (2.5 … 6 mm²), or 2× (14 … 10 AWG). That dual-range clamping lets you daisy-chain a feed-through conductor alongside the outgoing wire without needing a separate terminal block — a time-saver on the panel wireman's bench. The auxiliary switch option (product extension available) means you can wire a remote status signal back to a PLC input without an interposing relay.

Frequently asked questions

Who supplies 3RV1421-1FA10-ZX95 and how is it quoted for volume purchases?

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

What is 3RV1421-1FA10-ZX95's breaking capacity at 400 V?

It has a 100 kA breaking capacity at 400 V AC, which is the same rating it holds at 240 V and 500 V AC. At 690 V AC the rating drops to 6 kA.

What compliance documentation does this part carry?

The RoHS compliance date is 01.05.2012, indicating it meets the EU RoHS substance restrictions. The front face carries IP20 finger-safe touch protection.

MPN
3RV1421-1FA10-ZX95