Skip to main content
Log in
Siemens 3RV2421-1HA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2421-1HA10 SIRIUS Circuit Breaker, 100 kA @ 400 V

MPN3RV2421-1HA10
Active

Siemens SIRIUS circuit breaker, 3RV2421-1HA10, for transformer protection, 100 kA breaking capacity at 400 V, Class 10 trip, 45 mm wide, screw and snap-on DIN rail mount.

Siemens 3RV2421-1HA10 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

3RV2421-1HA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2421-1HA10 — 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
3RV2421-1HA10 — Protection & Tripping
ParameterValue
Overload release setting range5.5 ... 8 A
Instantaneous short-circuit trip current163 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
3RV2421-1HA10 — 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
3RV2421-1HA10 — 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)
3RV2421-1HA10 — 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
3RV2421-1HA10 — 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
3RV2421-1HA10 — Specifications
ParameterValue
Design Of The ProductFor transformer protection

Product details

Rated operating voltage spans 20 to 690 V, with a breaking capacity of 100 kA at 400 V and 42 kA at 500 V.

Trip class and protection features

Fuse backup ratings are specified: gL/gG 50 A at 400 V, 40 A at 500 V, 35 A at 690 V. If you need series coordination with upstream fuses, those are the maximum allowed ratings to maintain the breaking capacity.

Clearance requirements: 50 mm above and below, 30 mm to the sides, zero forward and backward. That 45 mm width (three 15 mm module spaces) fits a standard DIN-rail slot count. Main circuit terminals are M4 screw-type, accepting 2×(1–2.5 mm²) or 2×(2.5–10 mm²) solid or stranded copper. Strip length isn't given in the spec, but M4 screw terminals typically need 8–10 mm strip for a proper bite.

Frequently asked questions

What is 3RV2421-1HA10's listed depth (97 mm) on this component line?

The listed depth is 97 mm, with a width of 45 mm and height of 97 mm. Clearance required: 50 mm above and below, 30 mm to the sides, zero forward and backward.

Will 3RV2421-1HA10 drop into a panel that was specified around 3RV1011-1HA10 without rewiring?

Both mount on 35 mm DIN rail per DIN EN 60715, so the mechanical fit is the same. However, the 3RV2421-1HA10 is a transformer-protection design (Class 10 trip, phase failure detection), while the 3RV1011-1HA10 is a motor-protective breaker — verify the trip curve and protection requirements before swapping. Terminal sizes and wiring capacity may differ; check the specific terminal specs for each.

MPN
3RV2421-1HA10