Skip to main content
Log in
Siemens 3RA2125-4CD27-0AP6 — Motor Starters

Siemens 3RA2125-4CD27-0AP6 non-fused motor starter

MPN3RA2125-4CD27-0AP6

Siemens SIRIUS 3RA2125-4CD27-0AP6 non-fused motor starter, S0 size, direct starter, 22 A at 480 V, Class 10, 690 V AC-3 max, thermal bimetallic overload, supplied with contactor 3RT2027-1AP60 and link module 3RA2921-1AA00.

Siemens 3RA2125-4CD27-0AP6 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RA2125-4CD27-0AP6 — Identification
ParameterValue
Product designationnon-fused motor starter 3RA2
Main circuit poles3
BrandSIRIUS
Load feeder sizeS0
Product design / constructiondirect starter
Circuit-breaker sizeS0
Included contactor (type)3RT2027-1AP60
Included circuit-breaker (type)3RV2021-4CA15
Included link module (type)3RA2921-1AA00
3RA2125-4CD27-0AP6 — Ratings & Performance
ParameterValue
Rated motor power at 400 V11 000 W
Operational current Ie, AC-3 at 400 V22 A
Rated voltage at AC-3, max.690 V
Rated motor power at 460/480 V (hp)15 hp
Rated motor power at 575/600 V (hp)20 hp
Rated current at 480 V22 A
Rated current at 600 V21.9 A
Rated operating frequency50 ... 60 Hz
Rated impulse withstand voltage (Uimp)6 kV
Rated insulation voltage Ui (AC, pollution degree 3)690 V
Mechanical service life, typ. (switching cycles)10 000 000
3RA2125-4CD27-0AP6 — Protection & Tripping
ParameterValue
Trip classCLASS 10
Short-circuit protectionYes
Rated short-circuit current at 400 V (IEC 60947-4-1)153 000 A
Overload release setting range (current)17 ... 22 A
Overload release typethermal (bimetallic)
Short-circuit trip typemagnetic
Duty / utilization type (IEC 60947-6-2)2
3RA2125-4CD27-0AP6 — Contacts & Control
ParameterValue
Rated value690 V
Rated voltage range at 50 Hz176 ... 242 V
Auxiliary contacts, NO2
Auxiliary contacts, NC2
Auxiliary switch extensionYes
Switching contact typeelectromechanical
3RA2125-4CD27-0AP6 — Mechanical & Connection
ParameterValue
Main circuit connection typescrew-type terminals
Main contact conductor range (AWG)2x (16 ... 12), 2x (14 ... 8)
Mounting / fastening methodfor snapping onto 60 mm busbar systems
Mounting positionvertical
Width45 mm
Height260 mm
Depth155 mm
3RA2125-4CD27-0AP6 — Environmental
ParameterValue
Operating temperature range-20 ... +60 °C
Storage temperature range-50 ... +80 °C
Transport temperature range-55 ... +80 °C
Pollution degree3
Shock resistance (IEC 60068-2-27)6g / 11 ms

Product details

S0 direct starter with thermal overload

The Siemens 3RA2125-4CD27-0AP6 is a non-fused motor starter from the SIRIUS family, size S0, configured as a direct starter. It ships with the 3RT2027-1AP60 contactor and the 3RA2921-1AA00 link module already integrated — one order code, one assembly, no separate component sourcing.

Panel fit and busbar snap-on

Mounts vertically by snapping onto 60 mm busbar systems — no DIN-rail adapter needed. Dimensions are 45 mm wide, 260 mm high, 155 mm deep, with 30 mm clearance upward and 10 mm forward/downward for wiring and heat dissipation. The S0 footprint is a common size in Siemens load feeder ranges, so panel cutouts and gland-plate planning are straightforward.

MPN
3RA2125-4CD27-0AP6