Skip to main content
Siemens 3RV2021-1CA15 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-1CA15 SIRIUS Motor Protection Circuit Breake

MPN3RV2021-1CA15
Active

Siemens SIRIUS 3RV2021-1CA15 motor protection circuit breaker, Class 10, 20–690 V, 100 kA SCCR at 400 V, 45 mm wide, screw and snap-on DIN rail mount.

Siemens 3RV2021-1CA15 datasheet (PDF)
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026

Specifications

Identification

3RV2021-1CA15 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0

Electrical

3RV2021-1CA15 — Electrical
ParameterValue
Rated operational current (Ie)2.5 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

Protection & Tripping

3RV2021-1CA15 — Protection & Tripping
ParameterValue
Overload release setting range1.8 ... 2.5 A
Instantaneous short-circuit trip current33 A
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)10 kA
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V10 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes

Endurance & Switching

3RV2021-1CA15 — 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

Connections

3RV2021-1CA15 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, finely stranded with ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor range, AWG (main contacts)2x (16 ... 12), 2x (14 ... 8)

Mechanical

3RV2021-1CA15 — 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

Environmental

3RV2021-1CA15 — 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

Specifications

3RV2021-1CA15 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

What it is and what it does

The Siemens 3RV2021-1CA15 is a SIRIUS motor protection circuit breaker designed for motor protection duty, with phase failure detection and a Class 10 trip characteristic. It is rated for operating voltages from 20 to 690 V AC and delivers a 100 kA short-circuit current rating (SCCR) at both 240 V and 400 V, dropping to 10 kA at 690 V — meaning it can safely clear faults up to those levels without upstream damage in most industrial panels.

Mounting and panel fit

Mounts via screw and snap-on onto 35 mm DIN rail per DIN EN 60715, in any orientation. The 45 mm width and 97 mm depth fit standard motor starter footprints — same envelope as the 3RV2021-1FA15 sibling, so a panel spec'd around that variant accepts this one without rewiring.

Frequently asked questions

Where can I buy 3RV2021-1CA15 and how do I get a price?

This part is sourced 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.

Will 3RV2021-1CA15 drop into a panel that was specified around 3RV2021-1FA15 without rewiring?

Yes — the 45 mm width and 97 mm depth are identical to the 3RV2021-1FA15, and both use the same screw and snap-on DIN rail mount, so no rewiring or panel modification is needed.

What is 3RV2021-1CA15's listed depth?

97 mm.

What is 3RV2021-1CA15's listed width?

45 mm.

MPN
3RV2021-1CA15