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Siemens 3RA2125-4AA26-0AP6 — Motor Starters

Siemens 3RA2125-4AA26-0AP6 SIRIUS Motor Starter

MPN3RA2125-4AA26-0AP6

Siemens SIRIUS 3RA2125-4AA26-0AP6 non-fused motor starter, S0 size, direct starter design, 7.5 kW at 400 V, Class 10, thermal bimetallic overload, 45 x 97.1 x 193.1 mm.

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

Specifications

3RA2125-4AA26-0AP6 — 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)3RT2026-1AP60
Included circuit-breaker (type)3RV2021-4AA15
Included link module (type)3RA2921-1AA00
3RA2125-4AA26-0AP6 — Ratings & Performance
ParameterValue
Rated motor power at 400 V7 500 W
Operational current Ie, AC-3 at 400 V15.5 A
Rated voltage at AC-3, max.690 V
Rated motor power at 460/480 V (hp)10 hp
Rated motor power at 575/600 V (hp)10 hp
Rated current at 480 V15.2 A
Rated current at 600 V12.2 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
3RA2125-4AA26-0AP6 — 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)11 ... 16 A
Overload release typethermal (bimetallic)
Short-circuit trip typemagnetic
Duty / utilization type (IEC 60947-6-2)2
3RA2125-4AA26-0AP6 — 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
3RA2125-4AA26-0AP6 — Mechanical & Connection
ParameterValue
Main circuit connection typescrew-type terminals
Main contact conductor range (AWG)2x (16 ... 12), 2x (14 ... 8)
Mounting / fastening methodSnap-mounted to DIN rail or screw-mounted with additional push-in lug
Mounting positionvertical
Width45 mm
Height193.1 mm
Depth97.1 mm
3RA2125-4AA26-0AP6 — 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

Active production — what that means for your BOM line

The 3RA2125-4AA26-0AP6: The part ships as a factory-assembled unit: a 3RT2026-1AP60 contactor paired with a 3RA2921-1AA00 link module and a thermal bimetallic overload relay, all in one S0-size package.

Motor ratings across supply voltages

At 575/600 V the output is 12.2 A and 10 hp. For 230 V single-phase or low-line three-phase applications: 2 hp at 230 V, 5 hp at 220/230 V. At 200/208 V it delivers 3 hp. The control coil accepts 176–242 V at 50 Hz and 192–264 V at 60 Hz — covers the common 208–240 V control transformer taps without a separate coil change.

Trip class and overload protection

The bimetallic overload release is ambient-compensated across the -20 to +60 °C operating range, so the trip point stays stable whether the panel sits in a conditioned room or a hot enclosure.

Panel fit and mounting

Snap-mounts onto 35 mm DIN rail or screw-mounts with an additional push-in lug. The 45 mm width and 97.1 mm depth fit standard S0 feeder spacing — three units side-by-side occupy 135 mm of rail. Mounting position is vertical. Clearance requirements: 30 mm upwards, 10 mm forwards, 10 mm downwards, 9 mm at the side, zero backwards. Wire range for main contacts: 1–10 mm² stranded, or 2× (2.5–6 mm²) — covers most motor feeder cables up to 10 AWG.

Frequently asked questions

How do I get pricing and availability for 3RA2125-4AA26-0AP6?

Submit an RFQ against your BOM quantity. No stock-holding claim is made here — the quote reflects real-time factory and distributor inventory.

What is the depth of 3RA2125-4AA26-0AP6?

97.1 mm. Combined with the 45 mm width and 193.1 mm height, the envelope fits standard S0-size load feeder spacing in most IEC enclosures.

MPN
3RA2125-4AA26-0AP6