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Siemens 3RV2421-0EA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2421-0EA10 SIRIUS Circuit Breaker, 100 kA, Class

MPN3RV2421-0EA10
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Siemens SIRIUS circuit breaker 3RV2421-0EA10, Size S0, for transformer protection, Trip Class 10, 100 kA breaking capacity at 400 V AC, screw and snap-on mounting on 35 mm DIN rail.

Siemens 3RV2421-0EA10 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2421-0EA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2421-0EA10 — Electrical
ParameterValue
Rated operational current (Ie)0.4 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)5.5 W
Power loss, per pole (AC, hot)1.8 W
3RV2421-0EA10 — Protection & Tripping
ParameterValue
Overload release setting range0.28 ... 0.4 A
Instantaneous short-circuit trip current8.2 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
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V100 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2421-0EA10 — 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
3RV2421-0EA10 — 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
Conductor range, AWG (main contacts)2x (16 ... 12), 2x (14 ... 8)
3RV2421-0EA10 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth97 mm
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
Mounting positionany
3RV2421-0EA10 — 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
3RV2421-0EA10 — Specifications
ParameterValue
Design Of The ProductFor transformer protection

Product details

Transformer protection breaker with Class 10 trip

The Siemens 3RV2421-0EA10 is a SIRIUS circuit breaker specifically designed for transformer protection, with a Trip Class 10 characteristic that clears overloads quickly enough to protect the transformer winding without nuisance tripping on inrush. Rated breaking capacity reaches 100 kA at 240 V, 400 V, 500 V, and 690 V AC — that is the maximum fault current it can safely interrupt without welding contacts or cascading upstream, so it fits high-fault panels where the available short-circuit current is substantial.

Main circuit terminals accept screw-type connections: 2 x (1–2.5 mm²) or 2 x (2.5–10 mm²) solid or stranded. Use a Pozidriv size 2 screwdriver with a 5–6 mm shaft diameter.

Environmental and lifecycle

Rated for operation from -20 °C to +60 °C with temperature compensation active across that range. Storage and transport tolerate -50 °C to +80 °C.

Frequently asked questions

Where can I buy 3RV2421-0EA10 and 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 — submit an RFQ to get a firm price and lead time.

Will 3RV2421-0EA10 drop into a panel specified around 3RV2011-0AA10?

The 3RV2421-0EA10 is a different design — it is a Size S0 breaker for transformer protection with a 100 kA breaking capacity, while the 3RV2011-0AA10 is a standard motor-protective circuit breaker. Both mount on 35 mm DIN rail, but the trip characteristic, ratings, and auxiliary options differ. Check the nameplate ratings before swapping.

What is the depth of 3RV2421-0EA10?

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

MPN
3RV2421-0EA10