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Siemens 3RT6024-1AC20 — Contactors

Siemens 3RT6024-1AC20 SIRIUS Power Contactor, 23 kW at 400 V

MPN3RT6024-1AC20

Siemens SIRIUS power contactor, size S0, 3RT6024-1AC20, 24 V AC coil, screw terminals, 23 kW at 400 V AC-3, 45 mm width.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RT6024-1AC20 — Identification
ParameterValue
Contactor frame sizeS0
3RT6024-1AC20 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 690 V1 A
Rated value @ 230 V10 A
Rated value @ 24 V6 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT6024-1AC20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz24 V
3RT6024-1AC20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT6024-1AC20 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 63 A
Short-circuit coordination type 2, fusegL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 25 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT6024-1AC20 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 50022
Side-by-side mountingYes
3RT6024-1AC20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT6024-1AC20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT6024-1AC20 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth97 mm
3RT6024-1AC20 — Specifications
ParameterValue
At AC5 000 1/h

Product details

Its 24 V AC coil draws 6 A at rated voltage, and the main contacts are rated for AC-3 duty up to 690 V — so it handles the inrush and breaking of squirrel-cage motors up to 23 kW at 400 V and 40 kW at 690 V. Side-by-side mounting is allowed, which saves rail space when grouping multiple contactors in a motor control center.

The coil holds at 24 V AC, and the switching frequency at AC-3 is rated up to 1 000 operations per hour, which covers most conveyor, pump, and fan duty cycles without derating. For motor loads, the key number is the AC-3 rating: 23 kW at 400 V and 40 kW at 690 V. That is the current the contactor can make and break under motor starting conditions. If your motor nameplate exceeds those figures, step up to the next SIRIUS frame size.

Frequently asked questions

What is the closest functional second-source to 3RT6024-1AC20?

The 3RT6025-1AL20 is a size S0 contactor with a 24 V DC coil instead of AC. If your control circuit runs on DC, that is a direct drop-in replacement on the same DIN rail footprint. For AC coil applications, the 3RT6024-1AC20 is the correct variant.

Will 3RT6024-1AC20 fit into a panel designed for 3RT6025-1AL20?

Yes — both are size S0 with the same 45 mm width, 85 mm height, and 97 mm depth, and both snap onto 35 mm DIN rail. The only difference is the coil voltage type (AC vs DC). No rewiring of the main power circuit is needed.

What compliance documentation does Siemens provide for 3RT6024-1AC20?

The contactor carries a RoHS substance prohibition date of 05/01/2012, indicating compliance with EU RoHS. Standard Siemens documentation includes the CE declaration, UL/CSA file numbers, and the REACH compliance statement. Request the specific certificate with your RFQ.

Where can I buy 3RT6024-1AC20?

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

MPN
3RT6024-1AC20