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Siemens 3RV2021-1AA15 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-1AA15 SIRIUS Motor Protection CB, 100 kA

MPN3RV2021-1AA15
Active

Siemens SIRIUS motor protection circuit breaker, 3RV2021-1AA15, 100 kA SCCR at 400 V, CLASS 10 trip class, 45 mm width, screw and snap-on 35 mm DIN rail mounting.

$40.64Ref. price · indicative, final on quote
Siemens 3RV2021-1AA15 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2021-1AA15 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-1AA15 — 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
3RV2021-1AA15 — Protection & Tripping
ParameterValue
Overload release setting range1.1 ... 1.6 A
Instantaneous short-circuit trip current21 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)100 kA
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V100 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2021-1AA15 — 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
3RV2021-1AA15 — 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)
3RV2021-1AA15 — 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
3RV2021-1AA15 — 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
3RV2021-1AA15 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

Motor protection circuit breaker — 3RV2021-1AA15

The Siemens 3RV2021-1AA15 is a SIRIUS motor protection circuit breaker designed for motor protection, with a 100 kA short-circuit breaking capacity at 400 V (also 100 kA at 230 V, 500 V, and 690 V). Terminals accept 2×(0.5…1.5 mm²) or 2×(0.75…2.5 mm²) solid or stranded, with M4 screws for the main contacts.

Integration notes

Ambient derating above 40 °C applies per the thermal curve. The 97 mm depth and 97 mm height leave clearance for adjacent devices on the DIN rail — maintain 50 mm upwards and downwards, 30 mm at the side for cooling and wiring access.

Frequently asked questions

What is the SCCR of 3RV2021-1AA15 at 400 V?

100 kA at 400 V, and the same 100 kA rating holds at 230 V, 500 V, and 690 V — giving high fault-current headroom in most industrial panel designs.

Will 3RV2021-1AA15 drop into a panel specified for 3RV2021-1FA15?

Both are 45 mm wide SIRIUS motor protection breakers with the same DIN-rail footprint and screw-terminal pattern, so mechanical fit is identical. The difference is in the trip setting range and accessories — verify the thermal-magnetic adjustment range matches your motor FLA before swapping.

Where can I buy 3RV2021-1AA15?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit a request with quantity for a firm quote.

MPN
3RV2021-1AA15