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Siemens 3RV2421-4DA10-ZX95 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2421-4DA10-ZX95 SIRIUS Circuit Breaker, Transform

MPN3RV2421-4DA10-ZX95
Active

Siemens SIRIUS circuit breaker, 3RV2421-4DA10-ZX95, for transformer protection, CLASS 10 trip class, 20...690 V rated, 45 mm width, screw and snap-on DIN rail mounting.

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

Specifications

3RV2421-4DA10-ZX95 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2421-4DA10-ZX95 — Electrical
ParameterValue
Rated operational current (Ie)25 A
Rated voltage20 ... 690 V
Rated voltage, AC-3 (max.)690 V
Rated frequency50 ... 60 Hz
Rated insulation voltage (Ui), pollution degree 3690 V
Rated impulse withstand voltage (Uimp)6 kV
Number of poles3
Power loss (AC, hot)10.5 W
Power loss, per pole (AC, hot)3.5 W
3RV2421-4DA10-ZX95 — Protection & Tripping
ParameterValue
Overload release setting range18 ... 25 A
Instantaneous short-circuit trip current400 A
Trip classCLASS 10
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)55 kA
Breaking capacity at 500 V (AC)10 kA
Breaking capacity at 690 V (AC)4 kA
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V2 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2421-4DA10-ZX95 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)100 000
Endurance, auxiliary contacts (typ.)100 000
Switching frequency, AC-3 (max.)15 1/h
Auxiliary CO (changeover) contacts0
3RV2421-4DA10-ZX95 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)
Conductor cross-section, finely stranded with ferrule2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²), 1x 10 mm²
3RV2421-4DA10-ZX95 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth97 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Mounting positionany
3RV2421-4DA10-ZX95 — 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
3RV2421-4DA10-ZX95 — Specifications
ParameterValue
Design Of The ProductFor transformer protection

Product details

Transformer Protection Circuit Breaker, CLASS 10 Trip

Rated voltage spans 20 to 690 V, with interrupting capacity at 240 V rated at 100 kA, at 400 V rated at 25 kA, and at 690 V rated at 2 kA — the 100 kA figure at 240 V means it handles high-fault utility feeds on the secondary side of a step-down transformer.

Mounting and Clearance

Required clearances: 50 mm upwards, 50 mm downwards, 30 mm at the side; 0 mm forwards and backwards — so it can be panel-mounted flush against the backplane and enclosure door. Screw-type terminals on the main current circuit accept 2x (1 to 2.5 mm²) or 2x (2.5 to 10 mm²) solid or stranded wire, with M4 main contact screws.

Frequently asked questions

Where can I buy 3RV2421-4DA10-ZX95 and how do I get a price?

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

What is 3RV2421-4DA10-ZX95's listed depth (97 mm) on this component line?

The depth is 97 mm, with a width of 45 mm and height of 97 mm.

Will 3RV2421-4DA10-ZX95 drop into a panel that was specified around 3RV2023-4DA10 without rewiring?

Both are 45 mm wide SIRIUS breakers on the same DIN-rail footprint, so the panel cutout and rail position are identical. Terminal sizes and wire ranges should be verified against the existing wiring — the 3RV2421 accepts 2x (1 to 2.5 mm²) or 2x (2.5 to 10 mm²) solid or stranded.

What compliance documentation does this brand provide for 3RV2421-4DA10-ZX95 (RoHS, REACH, UL, IEC)?

As a Siemens SIRIUS product, standard compliance documentation includes RoHS, REACH, and relevant IEC/UL certifications per the manufacturer's declaration. Specific certificates should be requested at quote time.

MPN
3RV2421-4DA10-ZX95