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Siemens 3RA6120-2CP32 — Motor Starters

Siemens 3RA6120-2CP32 SIRIUS Compact Starter, 53 kA at 400 V

MPN3RA6120-2CP32
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Siemens SIRIUS 3RA6120-2CP32 compact direct starter, 53 kA at 400 V, adjustable Trip Class 10 and 20, 110-240 V AC/DC coil, spring-loaded terminals, 45 mm width.

StockContact for availability
Lead timeIn Stock wk
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

Identification

3RA6120-2CP32 — Identification
ParameterValue
Product designationcompact starter
Main circuit poles3
BrandSIRIUS
Product design / constructiondirect starter
Reference designation (IEC 81346-2)Q

Ratings & Performance

3RA6120-2CP32 — Ratings & Performance
ParameterValue
Rated motor power at 400 V1 500 W
Rated motor power at 460/480 V (hp)2 hp
Rated motor power at 575/600 V (hp)3 hp
Rated current at 480 V4 A
Rated current at 600 V4 A
Rated impulse withstand voltage (Uimp)6 000 V

Protection & Tripping

3RA6120-2CP32 — Protection & Tripping
ParameterValue
Trip classCLASS 10 and 20 adjustable
Short-circuit protectionYes
Overload release setting range (current)1 ... 4 A
Duty / utilization type (IEC 60947-6-2)continous operation according to IEC 60947-6-2

Contacts & Control

3RA6120-2CP32 — Contacts & Control
ParameterValue
Rated voltage range at 50 Hz240 V
Auxiliary contacts, NO1
Auxiliary contacts, NC1
Auxiliary switch extensionYes

Mechanical & Connection

3RA6120-2CP32 — Mechanical & Connection
ParameterValue
Main contact conductor range (AWG)2x (16 ... 10), 1x 8
Mounting / fastening methodscrew and snap-on mounting
Mounting positionany
Width45 mm
Height191 mm
Depth165 mm

Environmental

3RA6120-2CP32 — Environmental
ParameterValue
Operating temperature range-20 ... +60 °C
Storage temperature range-55 ... +80 °C
Transport temperature range-55 ... +80 °C
Pollution degree3

Product details

Compact starter with 53 kA interrupting capacity

The 3RA6120-2CP32: The adjustable trip class (Class 10 and 20) lets you match the overload release to the motor start profile: Class 10 for fast-ramping loads like pumps, Class 20 for high-inertia fans or conveyors that need a longer acceleration window before the overload trips.

Control supply and wiring

The coil accepts 110-240 V AC/DC — one part covers both 120 V and 240 V control systems without a separate transformer tap, and the DC rating means it works on battery-backed or rectified control buses. Main circuit wiring uses spring-loaded terminals accepting 2x (0.25-1.5 mm²) solid conductor — no screw torque check, just strip and push, which shaves a few minutes per termination on a multi-starter panel.

Mounting and environmental fit

Snap-on mounting to a standard DIN rail with a screw-down option for vibration-heavy environments — the 45 mm width fits a standard 8-module enclosure row, and the 191 mm height clears most shallow gland-plate enclosures. Rated for continuous operation per IEC 60947-6-2, pollution degree 3, and any mounting position — install it sideways or upside down if the panel layout demands it, with no derating penalty. Shock rated at 60 m/s² (6 g) for 10 ms, three shocks per axis, and vibration tested to 20 m/s² up to 500 Hz — it holds up on a machine frame next to a press or a conveyor drive without relay chatter.

Frequently asked questions

What is the breaking capacity of the 3RA6120-2CP32 at 400 V?

53 kA at 400 V — this is the maximum fault current the starter can safely interrupt without upstream protection needing to clear the fault.

Can I use this starter with a 240 V control system?

Yes, the coil is rated 110-240 V AC/DC, so it works on both 120 V and 240 V control circuits without modification.

MPN
3RA6120-2CP32