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Siemens 3RT1023-1AB04 — Contactors

Siemens 3RT1023-1AB04 SIRIUS Power Contactor, S0, 3NO, 24V 5

MPN3RT1023-1AB04

Siemens SIRIUS, power contactor, size S0, 3 NO main contacts, 24 V 50 Hz coil, screw-type terminals, IP20 front, 45 mm width.

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

3RT1023-1AB04 — Identification
ParameterValue
Contactor frame sizeS0
3RT1023-1AB04 — 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
3RT1023-1AB04 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz24 V
3RT1023-1AB04 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1023-1AB04 — 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
3RT1023-1AB04 — 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
3RT1023-1AB04 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1023-1AB04 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1023-1AB04 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth140 mm

Product details

S0 frame, 3 NO main contacts, 24 V 50 Hz coil

The 45 mm width and 85 mm height mean it fits a standard 4-module-wide panel slot. Front protection is IP20; the terminals themselves are IP00, so the contactor needs enclosure protection against accidental contact with live parts.

Motor switching ratings and coordination

For AC-2 duty at 400 V it handles 4 kW, and for AC-4 (reversing/inching) at 400 V it's rated 8.5 A. At 500 V it switches 4.5 kW motor loads; at 690 V it switches 5.5 kW. Type 1 coordination requires a 63 A gL/gG fuse; Type 2 coordination needs a 25 A gL/gG fuse.

The 140 mm depth fits standard 200 mm deep enclosures.

Frequently asked questions

Where can I buy 3RT1023-1AB04 and get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit an RFQ for current availability and pricing — no stock or price figures are listed here because they change daily.

What is the closest functional second-source to 3RT1023-1AB04?

The 3RT1023-1AL20 is a close peer — same S0 frame, same 3 NO contacts, but with a 24 V DC coil instead of 24 V 50 Hz. The 3RT1023-1AP00 uses a 110 V 50 Hz coil. All three share the same footprint, terminal layout, and main contact ratings, so they drop into the same panel wiring without rewiring the power circuit — only the coil supply differs.

What wire sizes does the 3RT1023-1AB04 accept?

The screw terminals accept 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or max 2x (0.75...4 mm²) for the coil/auxiliary circuit. For the main power circuit: 2x (1...2.5 mm²), 2x (2.5...6 mm²), or max 2x 10 mm². AWG equivalents: 2x (16...12), 2x (14...10), or 1x 8 for the main contacts.

Will 3RT1023-1AB04 drop into a panel wired for 3RT1023-1AL20?

Yes — both are size S0 with the same 45 mm width, 85 mm height, 140 mm depth, and screw terminal layout. The only difference is the coil voltage: 24 V 50 Hz on this part versus 24 V DC on the -1AL20. The power wiring and mounting hole pattern are identical, so no rewiring of the main circuit is needed — just verify the coil supply matches.

MPN
3RT1023-1AB04