Skip to main content
Siemens 3RT2023-4XJ40-0LA2 — Contactors

Siemens 3RT2023-4XJ40-0LA2 SIRIUS Contactor, Size S0, DC Coi

MPN3RT2023-4XJ40-0LA2

Siemens SIRIUS contactor, size S0, 3RT2023-4XJ40-0LA2, DC operated, ring cable lug coil connection, 45 mm width, screw and snap-on 35 mm DIN rail mounting.

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

Specifications

3RT2023-4XJ40-0LA2 — Identification
ParameterValue
Contactor frame sizeS0
3RT2023-4XJ40-0LA2 — 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
3RT2023-4XJ40-0LA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2023-4XJ40-0LA2 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
3RT2023-4XJ40-0LA2 — 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)
3RT2023-4XJ40-0LA2 — Connection & Mounting
ParameterValue
Main circuit connectionRing cable lug connection
Aux. / control circuit connectionring terminal lug connection
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2023-4XJ40-0LA2 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2023-4XJ40-0LA2 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2023-4XJ40-0LA2 — Mechanical
ParameterValue
Width45 mm
Height91 mm
Depth107 mm

Product details

The DC-operated coil uses a ring cable lug connection, which is a specific termination style for the magnet coil — not a standard screw terminal. This matters for panel wiring: you need a ring terminal crimped to the coil leads, not a ferrule or bare wire. The 45 mm width means it fits the standard S0 footprint — no surprises in an existing panel layout.

Integration notes

The S0 frame size is a workhorse form factor for up to about 7.5 kW motor loads at 400 V AC-3 duty. The dimensions — 45 mm wide, 91 mm high, 107 mm deep — are the standard S0 envelope, so it fits existing panel cutouts and busbar layouts without rework. The ring cable lug connection on the coil is the key wiring detail. Standard contactors often use blade or screw-clamp terminals; this one expects a ring terminal bolted to the coil posts. Verify your control wiring ends match before committing the panel — a field change from ring to fork terminal isn't possible without adapter hardware.

Frequently asked questions

What are the key dimensions for panel fit?

Width is 45 mm, height is 91 mm, depth is 107 mm — the standard S0 frame size.

What is special about the coil connection on this contactor?

The magnet coil termination is a ring cable lug connection, not a standard screw terminal. You must use ring terminals crimped to the coil supply wires.

What mounting options does this contactor support?

It can be screw-mounted or snapped onto a 35 mm DIN rail per EN 60715. Mounting position is flexible: ±180° rotation on vertical surfaces and ±22.5° tilt forward/backward.

What temperature range can this contactor handle?

Operating range is -40 to +70 °C; storage range is -55 to +80 °C.

MPN
3RT2023-4XJ40-0LA2