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Siemens 3RT1023-1AR64 — Contactors

Siemens 3RT1023-1AR64 SIRIUS Power Contactor, S0, 4 kW AC-2,

MPN3RT1023-1AR64

Siemens SIRIUS, power contactor, size S0, 3RT1023-1AR64, 4 kW at AC-2 400 V, 8.5 A AC-4, screw terminals, 45 mm width, IP20 front.

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

3RT1023-1AR64 — Identification
ParameterValue
Contactor frame sizeS0
3RT1023-1AR64 — 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
3RT1023-1AR64 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz400 V
3RT1023-1AR64 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1023-1AR64 — 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
3RT1023-1AR64 — 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
3RT1023-1AR64 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1023-1AR64 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1023-1AR64 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth140 mm

Product details

The Siemens 3RT1023-1AR64 is a SIRIUS S0-frame power contactor rated for switching motor loads at 4 kW under AC-2 duty at 400 V, and 8.5 A under AC-4 duty at 400 V — the AC-4 figure governs reversing or inching applications where the contacts break full motor current. Screw-type terminals on the main circuit accept up to 2x 10 mm² stranded, with auxiliary contacts rated 10 A at 24 V and 6 A at 230 V. The coil operates on 50/60 Hz with a pick-up range of 0.8...1.1 x rated voltage at 50 Hz and 0.85...1.1 at 60 Hz.

Coordination and protection requirements

Active lifecycle — current production

This part carries a lifecycle status of current production. No successor or replacement has been designated — the 3RT1023-1AR64 remains the active order code for this S0 contactor variant.

Frequently asked questions

What are the key motor ratings for 3RT1023-1AR64?

The contactor is rated 4 kW at AC-2 duty (400 V) for normal starting of slip-ring motors, and 8.5 A at AC-4 duty (400 V) for reversing or inching applications. For AC-1 resistive loads, the maximum operating current is 10 A.

What is the mounting footprint and terminal capacity?

Width is 45 mm, height 85 mm, depth 140 mm. It snaps onto 35 mm DIN rail per EN 50022. Main circuit screw terminals accept 2x (1...2.5 mm²) solid/stranded, up to 2x 10 mm² max. Auxiliary terminals accept 2x (0.5...1.5 mm²) to 2x (0.75...4 mm²).

Where can I buy 3RT1023-1AR64 and how is it quoted?

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

What compliance documentation is available for 3RT1023-1AR64?

As a Siemens SIRIUS product, it is designed to meet IEC/EN 60947-4-1 standards for contactors and motor starters. The IP20 front and pollution degree 3 rating are per IEC 60529 and IEC 60947-1. Specific RoHS/REACH declarations are available from Siemens on request.

MPN
3RT1023-1AR64