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Siemens 3RT1023-1AN24 — Contactors

Siemens 3RT1023-1AN24 SIRIUS Power Contactor, S0, 4.5 kW at

MPN3RT1023-1AN24

Siemens SIRIUS 3RT1023-1AN24, S0 power contactor, 45 mm wide, screw terminals, 4.5 kW at 500 V, 8.5 A AC-4, DIN-rail mount.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RT1023-1AN24 — Identification
ParameterValue
Contactor frame sizeS0
3RT1023-1AN24 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V8.5 A
Rated value @ 400 V3 A
Rated value @ 500 V4.5 kW
Rated value @ 690 V5.5 kW
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1023-1AN24 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz220 V
3RT1023-1AN24 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1023-1AN24 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 63 A
Short-circuit coordination type 2, fusefuse gL/gG: 25 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1023-1AN24 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Side-by-side mountingYes
3RT1023-1AN24 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1023-1AN24 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1023-1AN24 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth140 mm

Product details

The S0 frame keeps it to 45 mm wide, 85 mm tall, 140 mm deep — that's the same footprint as the rest of the SIRIUS S0 family, meaning a swap from a 3RT1023-1AL20 or similar S0 contactor is a direct mechanical fit.

For straight across-the-line starting (AC-3), the motor power ratings of 4.5 kW at 500 V and 5.5 kW at 690 V are the numbers to size against your motor nameplate.

Main power terminals accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or up to 2x 4 mm² solid, with AWG equivalents at 2x (16 to 12), 2x (14 to 10), and 1x 8. That's enough for the main circuit wiring on a motor up to 5.5 kW. Auxiliary contacts are rated for 10 A at 24 V, 6 A at 230 V, 3 A at 400 V — enough for PLC-level control circuits.

Frequently asked questions

Will the 3RT1023-1AN24 drop into a panel designed for the 3RT1023-1AL20?

Yes. Both are S0-frame SIRIUS contactors with the same 45 mm width, 85 mm height, and 140 mm depth, and the same screw-and-snap-on DIN-rail mounting. The mechanical fit is identical. The difference is the coil voltage — the 1AN24 uses a 24 V AC coil (the 'N' in the code), while the 1AL20 is a different coil variant. Check your control voltage before swapping.

What are the key motor power ratings for this contactor?

Rated for 4.5 kW at 500 V and 5.5 kW at 690 V. The AC-4 switching current is 8.5 A at 400 V, which is the rating for reversing or inching duty.

MPN
3RT1023-1AN24