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Siemens 3RV1421-1DA10-ZW97 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1421-1DA10-ZW97 SIRIUS Circuit Breaker, 3.2 A, 10

MPN3RV1421-1DA10-ZW97

Siemens SIRIUS circuit breaker for transformer protection, 3RV1421-1DA10-ZW97, 3.2 A rated continuous current, Class 10 trip, 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

3RV1421-1DA10-ZW97 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1421-1DA10-ZW97 — 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
3RV1421-1DA10-ZW97 — Protection & Tripping
ParameterValue
Overload release setting range2.2 ... 3.2 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)8 kA
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV1421-1DA10-ZW97 — Endurance & Switching
ParameterValue
Auxiliary CO (changeover) contacts0
3RV1421-1DA10-ZW97 — 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)
3RV1421-1DA10-ZW97 — 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
3RV1421-1DA10-ZW97 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1421-1DA10-ZW97 — Specifications
ParameterValue
Design Of The Productfor transformer protection

Product details

Transformer-protection circuit breaker, 3.2 A, Class 10, 100 kA

It delivers 100 kA breaking capacity at 400 V AC (100 kA at 240 V and 500 V as well), dropping to 8 kA at 690 V — the high fault clearing at distribution voltages makes it suitable for transformer primary-side protection in industrial panels. IP20 on the front, finger-safe touch protection. Screw terminals accept solid or stranded copper: 2x (1 to 2.5 mm²) and 2x (2.5 to 6 mm²) per clamp, AWG 14-10 for the main circuit. Auxiliary switch extension is supported.

Substance compliance date is 01.05.2012, indicating RoHS/REACH conformance from that date onward. Standard documentation (CE, UL/CSA pending verification) accompanies the unit.

Frequently asked questions

What is the breaking capacity of the 3RV1421-1DA10-ZW97 at 400 V?

100 kA at 400 V AC. The same 100 kA rating applies at 240 V and 500 V; at 690 V it drops to 8 kA.

Where can I buy the 3RV1421-1DA10-ZW97?

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

What is the trip class and what does it mean?

Class 10 means the breaker will trip within 10 seconds at 600% of the rated current — fast enough to protect transformer windings from sustained overloads.

Does the 3RV1421-1DA10-ZW97 detect phase failure?

Yes, phase failure detection is included. This prevents single-phasing damage on transformer or motor loads.

MPN
3RV1421-1DA10-ZW97