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Siemens 3RV1021-1AA15 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1021-1AA15 SIRIUS Motor Protection CB, 1.6 A, CLA

MPN3RV1021-1AA15

Siemens SIRIUS motor-protection circuit breaker, 3RV1021-1AA15, 1.6 A rated continuous current, CLASS 10 trip class, 100 kA breaking capacity at 400 V AC, screw terminals, IP20 front, for 35 mm DIN rail.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RV1021-1AA15 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1021-1AA15 — Electrical
ParameterValue
Rated voltage690 V
Rated voltage, AC-3 (max.)690 V
Rated impulse withstand voltage (Uimp)6 000 V
Number of poles3
Power loss (AC, hot)7.25 W
Power loss, per pole (AC, hot)2.4 W
3RV1021-1AA15 — Protection & Tripping
ParameterValue
Overload release setting range1.1 ... 1.6 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
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV1021-1AA15 — Endurance & Switching
ParameterValue
Auxiliary CO (changeover) contacts0
3RV1021-1AA15 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementfront side
Conductor cross-section, finely stranded with ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor range, AWG (main contacts)2x (14 ... 10)
3RV1021-1AA15 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth96 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 50022
Mounting positionany
3RV1021-1AA15 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1021-1AA15 — Specifications
ParameterValue
Design Of The Productfor motor protection

Product details

Rated power at 400 V is 0.55 kW, which aligns the breaker with a standard small-frame motor for light-duty industrial drives.

Snap-on mounting onto 35 mm DIN rail per DIN EN 50022, with screw-type terminals for both main and auxiliary circuits — the main terminals accept 2x (0.5…1.5 mm²) solid or 2x (1…2.5 mm²) stranded, and the auxiliary terminals share the same range.

For a BOM freeze or critical-spare holding, this part is a safe choice: no imminent obsolescence, and the SIRIUS family has long lifecycle support typical of Siemens industrial controls.

Auxiliary contact ratings: 1 A at 24 V, 0.5 A at 230 V, 0.15 A at 60 V — these are the switching limits for the signal contacts, not the main power path. If you need to switch a 24 VDC PLC input, 1 A is ample; for a 230 VAC contactor coil, 0.5 A covers most small contactors. Operating frequency at AC-3 duty is 15 operations per hour maximum — this is a motor-protection device, not a cycled load switch; it is designed to trip on fault, not to serve as a daily start-stop contactor. Rated insulation voltage is 690 V, and the device is rated for AC-3 duty up to 690 V — suitable for 400 V and 480 V systems with headroom.

Shock resistance rated at 25 g for 11 ms — survives shipping and typical industrial vibration. Substance prohibitance date of 05/01/2012 aligns with RoHS compliance — the part is RoHS-compliant and REACH-registered as standard for Siemens industrial controls.

Frequently asked questions

What is the closest functional alternative to 3RV1021-1AA15?

The 3RV2021-0HA15 is a functional peer in the same SIRIUS family, but it uses spring-cage terminals instead of screw terminals. The 3RV1011-1AA15 and 3RV1011-0HA10 are also close siblings with the same 1.6 A rating and CLASS 10 trip, differing in terminal type and auxiliary contact configuration. For a drop-in replacement without rewiring, verify terminal style and auxiliary contact count against your panel design.

What is the depth of 3RV1021-1AA15?

The depth is 96 mm, with a width of 45 mm and height of 97 mm. It fits a standard 45 mm DIN-rail slot with zero clearance required at sides or rear.

What wire sizes does the 3RV1021-1AA15 accept?

Solid wire: 2x (0.5…1.5 mm²) and 2x (0.75…2.5 mm²). Stranded wire: 2x (1…2.5 mm²) and 2x (2.5…6 mm²). AWG equivalents for main contacts are 2x (14…10). All terminals are screw-type.

Where can I buy the 3RV1021-1AA15?

This part is sourced and quoted 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.

MPN
3RV1021-1AA15