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Siemens 3RV2321-4FC10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2321-4FC10 SIRIUS Circuit Breaker, 10 kA at 400 V

MPN3RV2321-4FC10
Active

Siemens SIRIUS circuit breaker for starter combinations, 3RV2321-4FC10, 45 mm wide, 10 kA interrupting capacity at 400 V AC, screw and snap-on mounting on 35 mm DIN rail.

$77.47Ref. price · indicative, final on quote
Siemens 3RV2321-4FC10 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2321-4FC10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2321-4FC10 — Electrical
ParameterValue
Rated operational current (Ie)40 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)16.25 W
Power loss, per pole (AC, hot)5.4 W
3RV2321-4FC10 — Protection & Tripping
ParameterValue
Instantaneous short-circuit trip current480 A
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)20 kA
Breaking capacity at 500 V (AC)6 kA
Breaking capacity at 690 V (AC)3 kA
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V2 kA
Short-circuit trip typemagnetic
Short-circuit protectionYes
Phase-failure detectionNo
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2321-4FC10 — 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
3RV2321-4FC10 — 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)
3RV2321-4FC10 — 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
3RV2321-4FC10 — Environmental
ParameterValue
Operating temperature-20 ... +40 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Relative humidity (operation)10 ... 95 %
Max. installation altitude2 000 m
3RV2321-4FC10 — Specifications
ParameterValue
Design Of The ProductFor starter combinations

Product details

At 460/480 V it's rated for 30 hp motor loads, and at 230 V for 7.5 hp.

Mounting and fit

Depth is 97 mm, height 97 mm.

Termination and ratings

Main current circuit uses screw-type terminals, M4, accepting solid or stranded conductors: 2x (1–2.5 mm²) or 2x (2.5–10 mm²). Rated operational voltage spans 20–690 V. The interrupting capacity at 240 V is 100 kA, at 400 V it's 10 kA, at 500 V it's 3 kA, at 690 V it's 2 kA — the curve drops as voltage rises, which is typical for this class. Maximum switching frequency under AC-3 duty is 15 operations per hour. No ground-fault or phase-failure detection built in.

Frequently asked questions

What is the interrupting capacity of 3RV2321-4FC10 at 400 V?

10 kA at 400 V AC. At 240 V it is 100 kA, at 500 V it drops to 3 kA, and at 690 V to 2 kA.

What are the mounting dimensions and clearances for 3RV2321-4FC10?

Width 45 mm, depth 97 mm, height 97 mm. Clearances: 50 mm above and below, 30 mm to the side, zero forward or backward. Mounts on 35 mm DIN rail per DIN EN 60715.

Where can I buy 3RV2321-4FC10 and how is it quoted?

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

MPN
3RV2321-4FC10