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Siemens 3RT1023-3AN20 — Contactors

Siemens 3RT1023-3AN20 SIRIUS Power Contactor, S0 Frame, 8.5

MPN3RT1023-3AN20

Siemens SIRIUS 3RT1023-3AN20 power contactor, S0 frame, screw-type terminals, 8.5 A AC-4 at 400 V, 4 kW AC-2 at 400 V, 90 mm depth, 45 mm width, screw and snap-on 35 mm DIN rail.

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

3RT1023-3AN20 — Identification
ParameterValue
Contactor frame sizeS0
3RT1023-3AN20 — 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
3RT1023-3AN20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz220 V
3RT1023-3AN20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1023-3AN20 — 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
3RT1023-3AN20 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Side-by-side mountingYes
3RT1023-3AN20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1023-3AN20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1023-3AN20 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth90 mm

Product details

The 4 kW AC-2 rating at 400 V covers slip-ring motor starting, a less punishing cycle but still a real motor load, not a resistive heater.

Panel Fit & Wiring

Screw terminals accept solid or stranded conductors: 2x (0.25 to 2.5 mm²) for control wiring, and up to 2x 10 mm² or 1x 8 AWG for the main circuit. IP20 on the front, IP00 at the terminals: the terminal area is live and needs finger-safe shrouding in the panel build.

Coordination & Protection

Type 1 coordination (contactor may be damaged but no fire risk) allows a 63 A gL/gG fuse.

Frequently asked questions

Where can I buy 3RT1023-3AN20 and get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm quote.

What are the key ratings for 3RT1023-3AN20?

The contactor is rated 8.5 A in AC-4 duty at 400 V for severe motor switching, and 4 kW in AC-2 duty at 400 V for slip-ring motor starting. It accepts screw terminals up to 2x 10 mm² or 1x 8 AWG for the main circuit.

What is the depth of 3RT1023-3AN20?

The depth is 90 mm, with a width of 45 mm and height of 85 mm. It mounts on 35 mm DIN rail.

Will 3RT1023-3AN20 drop into a panel specified around 3RT1023-1AL20?

Both are S0 frame contactors from the same SIRIUS family, sharing the same 45 mm width and 35 mm DIN rail mounting. The terminal layout and footprint are identical, so it will physically fit without rewiring. The difference is in the coil voltage and auxiliary contact configuration — verify those against your control circuit before swapping.

MPN
3RT1023-3AN20