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Siemens 3RV1321-1HH10-ZX95 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1321-1HH10-ZX95 SIRIUS Circuit Breaker, 8 A, 50 k

MPN3RV1321-1HH10-ZX95

Siemens SIRIUS circuit breaker for starter combinations, 3RV1321-1HH10-ZX95, 8 A continuous, 50 kA breaking at 400 V AC, 3 poles, screw terminals, DIN rail mount.

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

Specifications

3RV1321-1HH10-ZX95 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1321-1HH10-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)3.5 W
Power loss, per pole (AC, hot)1.2 W
3RV1321-1HH10-ZX95 — Protection & Tripping
ParameterValue
Breaking capacity at 240 V (AC)50 kA
Breaking capacity at 400 V (AC)50 kA
Breaking capacity at 500 V (AC)10 kA
Breaking capacity at 690 V (AC)4 kA
Phase-failure detectionNo
Ground-fault detectionNo
3RV1321-1HH10-ZX95 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)100 000
Switching frequency, AC-3 (max.)15 1/h
3RV1321-1HH10-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)
3RV1321-1HH10-ZX95 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth96 mm
Mounting positionany
3RV1321-1HH10-ZX95 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
3RV1321-1HH10-ZX95 — Specifications
ParameterValue
Design Of The Productfor starter combinations

Product details

Rated 8 A continuous current, it handles a 3 kW motor at 400 V AC (AC-3 duty), and its 50 kA breaking capacity at 400 V AC means it can safely interrupt a short-circuit fault up to that level without the upstream device needing to clear it — critical for coordination in a motor branch circuit.

The 45 mm width (3-module footprint) and 96 mm depth fit standard distribution boards and motor control centers. Any mounting position works, and zero clearance at the sides and rear simplifies panel layout.

Breaking capacity drops with voltage: 50 kA at 240 V and 400 V AC, then 10 kA at 500 V, and 4 kA at 690 V. If your panel feeds a 690 V motor, verify the fault current at that point — the 4 kA rating may require upstream current-limiting fuses. The 100 000 mechanical cycles on the main contacts cover most conveyor and pump duty cycles; the 15 operations per hour at AC-3 is fine for normal starting but not for jogging or inching applications. Power dissipation runs 3.5 W total (1.2 W per pole) at rated current — negligible for thermal budget in a standard enclosure.

Main circuit terminals are screw-type, accepting 2x (1 to 2.5 mm²) solid or stranded, or 2x (2.5 to 6 mm²) — covers most panel wiring up to 6 mm². AWG equivalents are 2x (14 to 10) for the main contacts. No ground fault or phase failure detection on this variant — if those are required, look at the 3RV2 series with integrated phase monitoring.

Frequently asked questions

What is the breaking capacity of 3RV1321-1HH10-ZX95 at different voltages?

50 kA at 240 V and 400 V AC, 10 kA at 500 V AC, and 4 kA at 690 V AC. The 690 V rating is the one to watch — verify your available fault current at that voltage level.

Where can I buy 3RV1321-1HH10-ZX95 and how is it quoted?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ with your quantity and target delivery date for current pricing and availability confirmation.

Will 3RV1321-1HH10-ZX95 drop into a panel specified around 3RV6011-0CA10?

Both are 45 mm wide, 3-pole SIRIUS breakers on 35 mm DIN rail, so the footprint and mounting are identical. The 3RV1321 carries 8 A / 3 kW at 400 V with 50 kA breaking; the 3RV6011 is a different current rating — verify your motor FLA against the 8 A continuous rating before swapping.

What compliance documentation does Siemens provide for 3RV1321-1HH10-ZX95?

As a standard SIRIUS product, it carries CE marking for the European market and is designed to IEC/EN 60947-2 and 60947-4-1. RoHS and REACH declarations are available from Siemens upon request. UL/CSA listings are typical for the SIRIUS family but should be confirmed against the specific variant for your jurisdiction.

MPN
3RV1321-1HH10-ZX95