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Siemens 3RT2025-2AG24 — Contactors

Siemens 3RT2025-2AG24 SIRIUS Power Contactor, S0, 24 VDC

MPN3RT2025-2AG24
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Siemens SIRIUS 3RT2025-2AG24 power contactor, size S0, 24 VDC coil, spring-type terminals, screw and snap-on mounting on 35 mm DIN rail.

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

Specifications

3RT2025-2AG24 — Identification
ParameterValue
Contactor frame sizeS0
3RT2025-2AG24 — 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 V6 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2025-2AG24 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.25
Rated value @ 50 Hz110 V
3RT2025-2AG24 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2025-2AG24 — 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)
3RT2025-2AG24 — 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
3RT2025-2AG24 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2025-2AG24 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2025-2AG24 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth144 mm
3RT2025-2AG24 — Specifications
ParameterValue
At AC4 ... 16 ms

Product details

The AC-4 rating drops to 300 cycles per hour, reflecting the heavier duty of plugging or inching operations. The contactor mounts via screw or snap-on onto a 35 mm DIN rail per DIN EN 60715, with a mounting position that allows +/-180° rotation on a vertical surface and +/-22.5° tilt forward or backward.

The 24 VDC coil draws 6 A at rated value, which is the pickup current — the holding current will be lower. This matters for DC supply sizing, especially if multiple contactors pull in simultaneously. These are the AC-3 motor ratings; the actual load current must be within these limits for reliable switching without contact welding.

The spring-type terminals on the coil save wiring time compared to screw terminals — no torque driver needed.

Integration notes

Wire range for solid or stranded conductors is 1 to 10 mm² for the main circuit, and 2x (0.5 to 2.5 mm²) for the coil terminals. The spring-type terminals accept ferruled or bare wire; strip length is not specified here but typically 10 mm for this terminal type. The contactor has no built-in auxiliary switch block — if you need aux contacts for status feedback or interlocking, order a separate auxiliary switch block that mounts on the S0 frame. Dimensions are 45 mm wide, 102 mm high, and 144 mm deep. The S0 frame is one of the most common sizes, so panel cutouts and busbar systems for this footprint are widely available.

Frequently asked questions

What are the key ratings for this contactor?

It is a 3-pole SIRIUS S0 contactor with a 24 VDC coil, rated for AC-3 switching at 1000 cycles/h, with a mechanical life of 10,000,000 operations. Operating temperature range is -25 to +60 °C.

Does this contactor include auxiliary contacts?

No, it ships without an auxiliary switch block. An add-on block is required for auxiliary contacts.

What wire sizes does the spring terminal accept?

Main circuit terminals accept 1 to 10 mm² solid or stranded. Coil terminals accept 2x (0.5 to 2.5 mm²).

MPN
3RT2025-2AG24