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Siemens 3RV1421-1FA15 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1421-1FA15 SIRIUS Circuit Breaker, 5 A, CLASS 10,

MPN3RV1421-1FA15

Siemens SIRIUS 3RV1421-1FA15 circuit breaker for transformer protection, 5 A continuous, CLASS 10 trip, 100 kA breaking at 400 V AC, screw-type terminals, 45 mm wide, DIN-rail mount.

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

Specifications

3RV1421-1FA15 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1421-1FA15 — 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
3RV1421-1FA15 — Protection & Tripping
ParameterValue
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
3RV1421-1FA15 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)100 000
Switching frequency, AC-3 (max.)15 1/h
3RV1421-1FA15 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementfront side
Conductor cross-section, finely stranded with ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
3RV1421-1FA15 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth96 mm
Mounting positionany
3RV1421-1FA15 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
3RV1421-1FA15 — Specifications
ParameterValue
Design Of The Productfor transformer protection

Product details

Transformer-protection circuit breaker, 5 A, CLASS 10

At 45 mm wide, it takes one standard module slot. Terminals are screw-type on the main circuit; solid wire accepted: 2×(0.5…1.5 mm²) and 2×(0.75…2.5 mm²). Stranded: 2×(1…2.5 mm²) and 2×(2.5…6 mm²). No side or backward clearance needed — zero mm spacing — so you can pack modules tight on the rail. IP20 on the front; any mounting position allowed.

Electrical ratings and environment

Rated insulation voltage 690 V. Operating temperature -20…+60 °C; storage/transport -50…+80 °C. Shock resistance 25 g / 11 ms. Max operating altitude 2 000 m. At AC-3 duty, max switching rate 15 cycles/hour. Mechanical life of main contacts: 100 000 operations typical.

Frequently asked questions

What is the breaking capacity of 3RV1421-1FA15 at 400 V?

100 kA at 400 V AC, and the same at 240 V and 500 V AC. At 690 V AC it drops to 6 kA.

What compliance documentation does Siemens provide for 3RV1421-1FA15?

The evidence does not list specific RoHS, REACH, UL, or IEC certificates for this order code. Typically Siemens SIRIUS components carry CE, UL, and CSA marks; verify the specific declarations on the nameplate or request them at quote time.

Where can I buy 3RV1421-1FA15 and how is it quoted?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

MPN
3RV1421-1FA15