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Siemens 3RT1023-1AH04 — Contactors

Siemens 3RT1023-1AH04 SIRIUS Power Contactor, 10A 24V DC, S0

MPN3RT1023-1AH04

Siemens SIRIUS power contactor, Size S0, 3 NO main contacts, 10 A at 24 V DC coil, screw-type terminals, 45 mm width, snap-on DIN rail mounting.

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

3RT1023-1AH04 — Identification
ParameterValue
Contactor frame sizeS0
3RT1023-1AH04 — 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
3RT1023-1AH04 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz48 V
3RT1023-1AH04 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1023-1AH04 — 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
3RT1023-1AH04 — 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
3RT1023-1AH04 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1023-1AH04 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1023-1AH04 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth140 mm

Product details

Motor duty and switching capability

At 500 V it handles 4.5 kW, and at 690 V it handles 5.5 kW, both under AC-3 duty. The auxiliary contact block (2 NO) is rated for 10 A at 24 V DC, 6 A at 230 V, and derates down to 0.3 A at 220 V DC — watch the DC switching curve if you're breaking inductive loads on the aux side.

Screw-type terminals on the main circuit accept 2x (1 to 2.5 mm²) stranded or 2x (2.5 to 6 mm²) solid, with a maximum of 2x 10 mm² or 1x 8 AWG. The auxiliary terminals take 2x (0.5 to 1.5 mm²) or 2x (0.75 to 2.5 mm²). Side-by-side mounting is allowed with a 6 mm gap to adjacent devices — no derating required if ambient stays within -25 to +60 °C.

Frequently asked questions

Who supplies 3RT1023-1AH04 and how is it quoted for volume purchases?

This part is sourced through independent industrial distribution channels and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — no stock figures or firm prices are published here.

What is the closest functional second-source for 3RT1023-1AH04?

The peer MPN 3RT1023-1AL20 is the same Size S0 frame and same 3-pole NO configuration, but its coil is 230 V AC instead of 24 V DC. It will drop into the same DIN rail footprint and wiring pattern, but the coil voltage difference means the control circuit must be rewired if swapping between the two.

What are the key ratings for 3RT1023-1AH04?

The contactor is rated 10 A at 24 V DC coil, 8.5 A at 400 V AC-4 motor duty, 4.5 kW at 500 V AC-3, and 5.5 kW at 690 V AC-3. It has 3 NO main contacts and 2 NO auxiliary contacts. Dimensions are 45 mm wide, 85 mm high, 140 mm deep.

MPN
3RT1023-1AH04