Skip to main content
Siemens 3RV2021-1HA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-1HA10 SIRIUS Motor Protection Circuit Breake

MPN3RV2021-1HA10
Active

Siemens SIRIUS 3RV2021-1HA10 motor protection circuit breaker, Class 10, 100 kA interrupting capacity at 400 V AC, 45 mm wide, screw and snap-on 35 mm DIN rail mounting.

Siemens 3RV2021-1HA10 datasheet (PDF)
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026

Specifications

Identification

3RV2021-1HA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0

Electrical

3RV2021-1HA10 — Electrical
ParameterValue
Rated operational current (Ie)8 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)9.25 W
Power loss, per pole (AC, hot)3.1 W

Protection & Tripping

3RV2021-1HA10 — Protection & Tripping
ParameterValue
Overload release setting range5.5 ... 8 A
Instantaneous short-circuit trip current104 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)42 kA
Breaking capacity at 690 V (AC)6 kA
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V4 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes

Endurance & Switching

3RV2021-1HA10 — 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

3RV2021-1HA10 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)
Conductor cross-section, finely stranded with ferrule2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²), 1x 10 mm²
Conductor range, AWG (main contacts)2x (16 ... 12), 2x (14 ... 8)

Mechanical

3RV2021-1HA10 — 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

3RV2021-1HA10 — 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

3RV2021-1HA10 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

The Siemens 3RV2021-1HA10 is a SIRIUS motor-protection circuit breaker designed for Class 10 trip characteristics, meaning it will open within 10 seconds under a locked-rotor condition — matching the thermal curve of standard IEC induction motors up to about 5 hp at 460/480 V. It carries a 100 kA interrupting capacity at 400 V AC, which covers most industrial service-entrance and distribution-panel fault levels without requiring upstream current-limiting fuses.

Mounting and integration

Mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715. The 45 mm width matches the standard SIRIUS compact frame — fits alongside contactors in a motor starter assembly without extra panel space. Any mounting position is permitted. Main circuit terminals accept 2x (1 to 2.5 mm²) or 2x (2.5 to 10 mm²) solid or stranded copper, M4 screw-type.

Frequently asked questions

Where can I buy 3RV2021-1HA10 and how do I get a price?

This part is sourced to order against an RFQ through independent distribution. Submit an RFQ to confirm availability and current pricing.

Will 3RV2021-1HA10 drop into a panel that was specified around 3RV2021-1FA15 without rewiring?

Both are 45 mm wide SIRIUS motor-protection breakers on the same DIN-rail footprint, so mechanical fit is identical. However, the 3RV2021-1FA15 may have a different trip current or interrupting rating — verify the specific settings before substitution.

What compliance documentation does this brand provide for 3RV2021-1HA10?

Siemens SIRIUS products typically carry UL, CSA, CE, and IEC certifications. Specific documentation (RoHS, REACH, UL file) is available on request with an RFQ.

MPN
3RV2021-1HA10