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Siemens 3RT2023-2AC20 — Contactors

Siemens 3RT2023-2AC20 SIRIUS Power Contactor, S0, 24 VDC, Sp

MPN3RT2023-2AC20
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Siemens SIRIUS 3RT2023-2AC20 power contactor, size S0, 24 VDC coil, spring-type terminals, screw and snap-on 35 mm DIN rail mounting.

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

Specifications

3RT2023-2AC20 — Identification
ParameterValue
Contactor frame sizeS0
3RT2023-2AC20 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V8.5 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V1 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2023-2AC20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz24 V
3RT2023-2AC20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2023-2AC20 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 63A (690V,100kA), aM: 32A (690V,100kA), BS88: 63A (415V,80kA)
Short-circuit coordination type 2, fusegG: 25A (690V,100kA), aM: 20A (690V,100kA), BS88: 25A (415V,80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2023-2AC20 — Connection & Mounting
ParameterValue
Main circuit connectionspring-loaded terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid1 ... 10 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2023-2AC20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2023-2AC20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2023-2AC20 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth97 mm
3RT2023-2AC20 — Specifications
ParameterValue
At AC4 ... 16 ms

Product details

Panel Integration and Fit

Its 45 mm width, 102 mm height, and 97 mm depth fit standard panel layouts, with a mounting position that allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward and backward. The spring-type terminals on the magnet coil accept solid or stranded conductors from 1 to 10 mm², and dual conductors from 0.5 to 2.5 mm², so it integrates directly into a control cabinet without needing lug adapters.

Duty Cycle and Switching Performance

This contactor is rated for 1,000 operating cycles per hour under AC-1, AC-2, AC-3, and AC-3e duty, and 300 cycles per hour under AC-4. The arcing time is 10 ms. For auxiliary contact switching, the 24 V rated value is 10 A, with derated values at higher voltages (2 A at 48 V and 60 V, 1 A at 110 V, 0.9 A at 125 V, 0.3 A at 220 V, 3 A at 400 V, 0.6 A at 440 V). The typical mechanical service life of the contactor is 10,000,000 operations.

Frequently asked questions

What are the key dimensions for panel layout?

The contactor is 45 mm wide, 102 mm high, and 97 mm deep. It mounts on a 35 mm DIN rail with screw or snap-on fastening, and the mounting position allows +/-180° rotation on a vertical surface.

What wire sizes does the spring terminal accept?

The spring-type terminals accept solid or stranded conductors from 1 to 10 mm², and dual conductors from 0.5 to 2.5 mm².

What is the switching frequency under motor load (AC-3)?

Under AC-3 duty, the contactor is rated for 1,000 operating cycles per hour maximum.

MPN
3RT2023-2AC20