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Siemens 3RA2120-4DA27-0AK6 — Motor Starters

Siemens 3RA2120-4DA27-0AK6 SIRIUS Load Feeder

MPN3RA2120-4DA27-0AK6

Siemens SIRIUS 3RA2120-4DA27-0AK6 non-fused load feeder, S0 size, direct starter, CLASS 10, 22.2 A at 480 V AC-3, 45 mm wide, screw and snap-on DIN rail mount.

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

Specifications

3RA2120-4DA27-0AK6 — Identification
ParameterValue
Product designationnon-fused load feeders 3RA2
Main circuit poles3
BrandSIRIUS
Load feeder sizeS0
Product design / constructiondirect starter
Circuit-breaker sizeS0
Included contactor (type)3RT2027-1AK60
Included circuit-breaker (type)3RV2021-4DA10
Included link module (type)3RA2921-1AA00
3RA2120-4DA27-0AK6 — 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 V22.2 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
3RA2120-4DA27-0AK6 — 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)20 ... 25 A
Overload release typethermal (bimetallic)
Short-circuit trip typemagnetic
Duty / utilization type (IEC 60947-6-2)2
3RA2120-4DA27-0AK6 — Contacts & Control
ParameterValue
Rated value690 V
Rated voltage range at 50 Hz110 V
Auxiliary switch extensionYes
Switching contact typeelectromechanical
3RA2120-4DA27-0AK6 — Mechanical & Connection
ParameterValue
Main circuit connection typescrew-type terminals
Main contact conductor range (AWG)2x (16 ... 12), 2x (14 ... 8)
Mounting / fastening methodscrew and snap-on mounting onto 35 mm standard mounting rail
Mounting positionvertical
Width45 mm
Height193.1 mm
Depth97.1 mm
3RA2120-4DA27-0AK6 — Environmental
ParameterValue
Operating temperature range-20 ... +60 °C
Storage temperature range-50 ... +80 °C
Transport temperature range-50 ... +80 °C
Pollution degree3
Shock resistance (IEC 60068-2-27)6g / 11 ms

Product details

What this SIRIUS load feeder delivers

Rated for AC-3 duty up to 690 V, it delivers 22.2 A at 480 V and 21.9 A at 600 V, with motor power ratings of 11 kW at 400 V, 15 kW at 500 V, and 22 kW at 690 V. The CLASS 10 trip class means the overload relay will trip within 10 seconds at 7.2× the set current — standard protection for standard induction motor starts where the acceleration time stays under 10 seconds. This is a direct-starter assembly: the contactor and overload relay are integrated into one unit, so it switches the motor directly across the line without a soft-start or VFD.

Mounts on a 35 mm DIN rail via the screw and snap-on mechanism, occupying 45 mm of rail width with a height of 193.1 mm and depth of 97.1 mm. Clearance requirements: 30 mm upward, 10 mm forward, 10 mm downward, 9 mm at the sides, and 0 mm backward — the back sits flush against the mounting surface. Main contact wiring accepts stranded conductors from 1 to 10 mm², or two conductors of 2.5 to 6 mm² each.

Environmental range

Coil rated for 110 V at 50 Hz and 120 V at 60 Hz (type of assignment 2), meaning the control circuit is separate from the main power circuit.

Frequently asked questions

Does 3RA2120-4DA27-0AK6 include a contactor and overload relay?

Yes, it is a complete direct-starter assembly that includes the supplied contactor (3RT2027-1AK60) and link module (3RA2921-1AA00), integrating the contactor and overload relay into one unit.

Where can I buy 3RA2120-4DA27-0AK6 with fast delivery?

This part is sourced to order against an RFQ. Availability and pricing are confirmed at quote time.

MPN
3RA2120-4DA27-0AK6