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Siemens 3RA2120-1KD24-0AP0 — Motor Starters

Siemens 3RA2120-1KD24-0AP0 SIRIUS Direct Starter, S0, 45 mm

MPN3RA2120-1KD24-0AP0
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Siemens SIRIUS 3RA2120-1KD24-0AP0 direct-on-line starter, Size S0, 45 mm width, 155 mm depth, 260 mm height, Class 10 trip, for 60 mm busbar systems, includes 3RT2024-1AP00 contactor and 3RA2921-1AA00 link module.

StockContact for availability
Lead time3-5 Days wk
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

Identification

3RA2120-1KD24-0AP0 — Identification
ParameterValue
Product designationDirect (on-line) starter
Main circuit poles3
BrandSIRIUS
Load feeder sizeS0
Product design / constructionfor 60 mm busbars
Circuit-breaker sizeS00
Included contactor (type)3RT2024-1AP00
Included circuit-breaker (type)3RV2011-1KA10
Included link module (type)3RA2921-1AA00

Ratings & Performance

3RA2120-1KD24-0AP0 — Ratings & Performance
ParameterValue
Rated motor power at 400 V5 500 kW
Rated voltage at AC-3, max.690 V
Rated motor power at 460/480 V (hp)7.5 hp
Rated motor power at 575/600 V (hp)10 hp
Rated current at 480 V11 A
Rated current at 600 V10 A
Rated operating frequency50 ... 60 Hz
Rated impulse withstand voltage (Uimp)6 kV
Rated insulation voltage Ui (AC, pollution degree 3)690 V

Protection & Tripping

3RA2120-1KD24-0AP0 — Protection & Tripping
ParameterValue
Trip classCLASS 10
Short-circuit protectionYes
Rated short-circuit current at 400 V (IEC 60947-4-1)150 000 A
Overload release setting range (current)9 ... 12.5 A
Overload release typethermal (bimetallic)
Short-circuit trip typemagnetic
Duty / utilization type (IEC 60947-6-2)2

Contacts & Control

3RA2120-1KD24-0AP0 — Contacts & Control
ParameterValue
Rated value690 V
Rated voltage range at 50 Hz230 ... 230 V
Control supply voltage typeAC
Auxiliary switch extensionYes
Switching contact typeelectromechanical

Communication

3RA2120-1KD24-0AP0 — Communication
ParameterValue
AS-Interface protocol supportNo

Mechanical & Connection

3RA2120-1KD24-0AP0 — Mechanical & Connection
ParameterValue
Mounting / fastening methodfor snapping onto 60 mm busbar systems
Mounting positionvertical
Width45 mm
Height260 mm
Depth155 mm

Environmental

3RA2120-1KD24-0AP0 — Environmental
ParameterValue
Operating temperature range-20 ... +60 °C
Storage temperature range-50 ... +80 °C
Transport temperature range-50 ... +80 °C
Shock resistance (IEC 60068-2-27)6g / 11 ms

Product details

What's in the box — integrated starter package

This 3RA2120-1KD24-0AP0 is a pre-assembled direct-on-line starter from the SIRIUS family, Size S0. It ships with the 3RT2024-1AP00 contactor and the 3RA2921-1AA00 link module already matched — no separate ordering or wiring of the contactor-coil circuit.

Trip class and motor protection

The maximum rated operational voltage is 690 V, covering 400 V and 480 V common in North American and European panels.

Mounting and panel fit

Mounts vertically on a 60 mm busbar system or standard 35 mm DIN rail. The 45 mm width and 155 mm depth leave room alongside other S0 feeders in a multi-motor panel. Clearance requirements: 50 mm upward, 20 mm forward, 20 mm at the sides, 10 mm downward — plan your enclosure depth and gland-plate layout accordingly.

Frequently asked questions

What contactor and link module come with this starter?

The package includes the 3RT2024-1AP00 contactor and the 3RA2921-1AA00 link module, pre-assembled as a matched set.

MPN
3RA2120-1KD24-0AP0