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Siemens 3RT2025-2XB40-0LA2 — Contactors

Siemens 3RT2025-2XB40-0LA2 SIRIUS Power Contactor, 24 VDC Co

MPN3RT2025-2XB40-0LA2
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Siemens SIRIUS power contactor, 3RT2025-2XB40-0LA2, S0 frame size, 24 VDC coil with spring-type terminals, screw and snap-on 35 mm DIN rail mounting.

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

3RT2025-2XB40-0LA2 — Identification
ParameterValue
Contactor frame sizeS0
3RT2025-2XB40-0LA2 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V15.5 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V3 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2025-2XB40-0LA2 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2025-2XB40-0LA2 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
3RT2025-2XB40-0LA2 — 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)
3RT2025-2XB40-0LA2 — Connection & Mounting
ParameterValue
Main circuit connectionspring-loaded terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid2x (1 ... 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
3RT2025-2XB40-0LA2 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2025-2XB40-0LA2 — Environmental
ParameterValue
Operating temperature range-40 ... +70 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2025-2XB40-0LA2 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth107 mm

Product details

The S0 size means it occupies a 45 mm width on the rail, with a depth of 107 mm and height of 102 mm — a compact footprint for a contactor rated for AC-3 duty cycles up to 1,000 operations per hour.

The 24 VDC coil draws a 3 A inrush peak, with a hold-in range that drops out below roughly 18 V — standard for DC-operated contactors. The spring-type terminals on the coil accept solid conductors from 1 to 10 mm² and stranded from 0.5 to 2.5 mm², which covers most control-circuit wiring in panel builds. The main contacts are rated for AC-3 switching at up to 1,000 cycles per hour, and for AC-4 (plugging/reversing) at 300 cycles per hour — the derating for severe duty is built in. The contactor's mechanical life is typical at 10 million operations, so it suits high-cycle applications like conveyor or pump control where the contactor sees frequent switching.

Mounting and Integration Details

The auxiliary switch is included, so no separate add-on block is needed for basic signaling. The spring-type terminals on the coil reduce wiring time compared to screw terminals — strip to 8 mm, insert, and the cage holds. For the main contacts, the solid wire range is 2x (1 to 10 mm²), which handles motor feeds up to the contactor's rating.

Frequently asked questions

What is the depth of this contactor?

The depth is 107 mm, with a width of 45 mm and height of 102 mm, fitting the S0 frame size.

What wire sizes does the coil terminal accept?

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

Will this drop into a panel specified for the 3RT2024-2BB40?

Both are S0 frame contactors with the same DIN-rail footprint, so the mechanical fit is identical. However, verify the coil voltage — this unit is 24 VDC — and the terminal type (spring vs screw) before substituting.

MPN
3RT2025-2XB40-0LA2