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Siemens 3RV2721-4CD10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2721-4CD10 SIRIUS Circuit Breaker, 25 kA at 400 V

MPN3RV2721-4CD10
Active

Siemens SIRIUS 3RV2721-4CD10 circuit breaker, size S0, 25 kA breaking capacity at 400 V AC, screw and snap-on DIN rail mount, for system protection per UL 489.

$104.14Ref. price · indicative, final on quote
Siemens 3RV2721-4CD10 datasheet (PDF)
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

3RV2721-4CD10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2721-4CD10 — Electrical
ParameterValue
Rated operational current (Ie)22 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)10.5 W
Power loss, per pole (AC, hot)3.5 W
3RV2721-4CD10 — Protection & Tripping
ParameterValue
Instantaneous short-circuit trip current286 A
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)55 kA
Breaking capacity at 500 V (AC)10 kA
Breaking capacity at 690 V (AC)4 kA
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V2 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionNo
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2721-4CD10 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)100 000
Endurance, auxiliary contacts (typ.)100 000
Switching frequency, AC-3 (max.)15 1/h
3RV2721-4CD10 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded1 ... 10 mm², max. 2x 10 mm²
Conductor cross-section, finely stranded with ferrule1 ... 16 mm², max. 6 + 16 mm²
Conductor range, AWG (main contacts)2x (14 ... 10)
3RV2721-4CD10 — Mechanical
ParameterValue
Height144 mm
Width45 mm
Depth97 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Mounting positionany
3RV2721-4CD10 — 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
3RV2721-4CD10 — Specifications
ParameterValue
Design Of The ProductFor system protection according to UL 489/CSA C22.2 No. 5

Product details

The Siemens 3RV2721-4CD10 is a SIRIUS circuit breaker in the S0 frame size, designed for system protection per UL 489 and CSA C22.2 No. 5. Rated voltage range spans 20 to 690 V, with a 25 kA breaking capacity at 400 V AC and 55 kA at 400 V AC under the UL/CSA rating path. At 230 V, it handles motor loads up to 5.5 kW.

Backup fuse ratings are specified per voltage: gG 63 A at 400 V, gG 50 A at 500 V and 690 V. These limit let-through energy and protect downstream components during a high-fault event.

Panel integration and clearances

Required clearances: 70 mm above and below, 30 mm to the side, 0 mm forward and backward. No extra side gap needed if mounted against a panel wall. Main contact screws are M4; use a Pozidriv size 2 screwdriver with a 5–6 mm diameter shaft.

Frequently asked questions

Where can I buy 3RV2721-4CD10 and how do I get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — confirmed at quote time.

What is the closest functional second-source to 3RV2721-4CD10?

The 3RV2023-4DA10 is a peer in the same SIRIUS family and S0 frame size, but it carries different breaking capacity and trip characteristics. Verify coordination and selectivity before substituting — the 3RV2721-4CD10 is designed for system protection per UL 489, while the 3RV2023-4DA10 may target motor protection. They are not drop-in replacements without re-evaluating the circuit.

What compliance documentation does this brand provide for 3RV2721-4CD10?

The breaker is designed for system protection per UL 489 and CSA C22.2 No. 5. Standard compliance documentation (RoHS, REACH, CE, UKCA, EAC) is available from the manufacturer's technical documentation portal.

MPN
3RV2721-4CD10