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Siemens 3RV1421-0CA10-ZX95 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1421-0CA10-ZX95 SIRIUS Circuit Breaker, 0.25 A, T

MPN3RV1421-0CA10-ZX95

Siemens SIRIUS circuit breaker for transformer protection, 3RV1421-0CA10-ZX95, 0.25 A rated continuous current, CLASS 10 trip class, 100 kA breaking capacity at 400 V AC, screw and snap-on mounting on 35 mm DIN rail.

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

Specifications

3RV1421-0CA10-ZX95 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1421-0CA10-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)5.5 W
Power loss, per pole (AC, hot)1.8 W
3RV1421-0CA10-ZX95 — Protection & Tripping
ParameterValue
Overload release setting range0.18 ... 0.25 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)100 kA
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV1421-0CA10-ZX95 — Endurance & Switching
ParameterValue
Auxiliary CO (changeover) contacts0
3RV1421-0CA10-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)
3RV1421-0CA10-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
3RV1421-0CA10-ZX95 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1421-0CA10-ZX95 — Specifications
ParameterValue
Design Of The Productfor transformer protection

Product details

It carries a 0.25 A continuous current rating and a CLASS 10 trip class, so it coordinates with downstream contactors and overloads on motor-starting or transformer-energizing duty.

The part delivers 100 kA breaking capacity at 240 V, 400 V, 500 V, and 690 V AC — a flat 100 kA across the voltage range. The 6 000 V surge voltage resistance (rated impulse withstand) supports coordination with Type 2 surge arrestors.

Wiring and terminal details

Screw-type terminals on both the main current circuit and the auxiliary/control circuit. The main terminals accept 2x (1... 2.5 mm²) solid or stranded, and 2x (2.5... 6 mm²) solid or stranded — so you can land a single 6 mm² feed or double up 2.5 mm² for a loop-through. Finely stranded with core-end processing (ferrules) is also accepted in the same ranges. The auxiliary switch option (product extension auxiliary switch: Yes) means you can add a signal contact for remote status indication without a separate terminal block. Finger-safe touch protection on the front (IP20) keeps panel builders safe during commissioning.

Shock resistance is 25 g for 11 ms — rated for transport and machine-mounted vibration. The backwards and at-the-side clearance is 0 mm — no air gap required behind or beside the device, which is useful when packing breakers tight on a DIN rail.

Frequently asked questions

Where can I buy 3RV1421-0CA10-ZX95 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 — send your volume and target price, and we will come back with a friend price for you.

What is the closest functional second-source for 3RV1421-0CA10-ZX95?

The peer candidates 3RV1011-0GA10 and 3RV1011-0HA10 are functionally similar SIRIUS breakers, but they are not transformer-protection variants — the 3RV1421-0CA10-ZX95 is specifically designed for transformer inrush. If you are replacing a 3RV1011-0GA10 in a panel, check the trip curve and continuous current rating; the 0.25 A and CLASS 10 of this part may not match the original spec without rewiring.

What is the depth of 3RV1421-0CA10-ZX95?

The depth is 96 mm. Combined with the 45 mm width and 97 mm height, it fits a standard 45 mm modular slot on DIN rail with zero side clearance required.

What wire sizes does the 3RV1421-0CA10-ZX95 accept?

The screw-type terminals accept 2x (1... 2.5 mm²) solid or stranded, and 2x (2.5... 6 mm²) solid or stranded. Finely stranded wire with ferrules is also accepted in the same ranges.

What compliance documentation is available for this part?

The part carries RoHS compliance with a substance prohibitance date of 01.05.2012. The SIRIUS series typically holds UL, CSA, and CE certifications for the European and North American markets, though specific marks for this variant should be verified against the manufacturer's declaration.

MPN
3RV1421-0CA10-ZX95