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Siemens 3RV2321-1AC20 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2321-1AC20 SIRIUS Circuit Breaker, 100 kA at 400

MPN3RV2321-1AC20
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Siemens SIRIUS S0 circuit breaker, 3RV2321-1AC20, for starter combinations, 100 kA breaking capacity at 400 V AC, screw and snap-on mounting on 35 mm DIN rail.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RV2321-1AC20 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2321-1AC20 — Electrical
ParameterValue
Rated operational current (Ie)1.6 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)7.25 W
Power loss, per pole (AC, hot)2.4 W
3RV2321-1AC20 — Protection & Tripping
ParameterValue
Instantaneous short-circuit trip current21 A
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
Short-circuit protectionYes
Phase-failure detectionNo
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2321-1AC20 — 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
3RV2321-1AC20 — Connections
ParameterValue
Main-circuit terminal typespring-loaded terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (1 ... 10 mm²)
Conductor cross-section, finely stranded with ferrule2x (1 ... 6 mm²)
3RV2321-1AC20 — Mechanical
ParameterValue
Height119 mm
Width45 mm
Depth97 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Mounting positionany
3RV2321-1AC20 — 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
3RV2321-1AC20 — Specifications
ParameterValue
Design Of The ProductFor starter combinations

Product details

Rated breaking capacity hits 100 kA at 240 V, 400 V, 500 V, and 690 V AC — that is the same high-interrupt rating across the common industrial voltage bands, meaning you do not need to derate or upsize for a 480 V or 600 V line. The 100 kA figure at 400 V AC is the one that governs most European and Asian panels; at 480 V the motor full-load current rating is 1.6 A, and at 600 V it is also 1.6 A.

Dimensions are 97 mm deep, 45 mm wide, and 119 mm tall — the S0 frame size. Clearance requirements: 50 mm upwards and downwards, 30 mm at the sides, zero forwards or backwards.

Environmental limits and wiring

No ground-fault or phase-failure detection built in — that is handled upstream or by the overload relay in the starter combination.

Frequently asked questions

How do I get current pricing and availability for 3RV2321-1AC20?

Submit an RFQ through this listing. The part is sourced and quoted to order against an RFQ through independent distribution, with availability and current pricing confirmed at quote time.

What is 3RV2321-1AC20's depth?

97 mm. Combined with a width of 45 mm and height of 119 mm, it occupies the standard S0 frame footprint.

Will 3RV2321-1AC20 drop into a panel specified around 3RV2011-0BA20?

Both are S0 frame circuit breakers on 35 mm DIN rail, so the mounting footprint and clearance are the same. The 3RV2321-1AC20 carries a 100 kA breaking capacity at 400 V versus the 3RV2011-0BA20's lower rating — verify the interrupting requirement before substituting.

MPN
3RV2321-1AC20