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Siemens 3RT2023-2AL20 — Contactors

Siemens 3RT2023-2AL20 SIRIUS Power Contactor, Size S0, 45mm

MPN3RT2023-2AL20
Active

Siemens SIRIUS power contactor, size S0, 3RT2023-2AL20, 45 mm width, spring-type coil terminals, 1,000 switching cycles per hour at AC-1.

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

Specifications

3RT2023-2AL20 — Identification
ParameterValue
Contactor frame sizeS0
3RT2023-2AL20 — 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
3RT2023-2AL20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz230 V
3RT2023-2AL20 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2023-2AL20 — 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)
3RT2023-2AL20 — 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
3RT2023-2AL20 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2023-2AL20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2023-2AL20 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth97 mm
3RT2023-2AL20 — Specifications
ParameterValue
At AC4 ... 16 ms

Product details

It snaps onto a 35 mm DIN rail per DIN EN 60715 or screws down, and it's rated for 1,000 switching cycles per hour at AC-1 duty — that's where it handles resistive loads at full rated current without derating. The coil connection uses spring-type terminals, so you're not cranking down screws on a ladder.

At 45 mm wide and 102 mm tall, this S0 contactor fits a standard 8-inch panel depth with room for a finger-safe cover.

Wire it up

Coil terminals are spring-cage; strip 10 mm and push in. Clearance to adjacent devices: 10 mm above and below, 6 mm to the side.

Frequently asked questions

Will the 3RT2023-2AL20 drop into a panel designed for the 3RT2024-2BB40?

Both are S0 frame size contactors with the same 45 mm width and DIN-rail mounting, so the footprint and panel cut-out are identical. The main difference is in the coil voltage and auxiliary contact configuration — check your control voltage before swapping.

What are the key dimensions for panel layout?

Width 45 mm, height 102 mm, depth 97 mm. Allow 10 mm clearance above and below the contactor, 6 mm at the sides for airflow and wiring access.

What wire sizes does the 3RT2023-2AL20 accept?

Main terminals accept 1 to 10 mm² solid or stranded copper. The auxiliary and coil terminals use spring-cage connections; the coil terminals accept 2x (0.5 to 2.5 mm²) solid or stranded.

MPN
3RT2023-2AL20