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Siemens 3RT1025-1AG24 — Contactors

Siemens 3RT1025-1AG24 SIRIUS Power Contactor, S0, 24 VDC, 15

MPN3RT1025-1AG24

Siemens SIRIUS Size S0 power contactor, 3RT1025-1AG24, 24 VDC coil, screw terminals, 15.5 A AC-4 at 400 V, DIN rail mount.

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

3RT1025-1AG24 — Identification
ParameterValue
Contactor frame sizeS0
3RT1025-1AG24 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V15.5 A
Rated value @ 400 V3 A
Rated value @ 500 V10 kW
Rated value @ 690 V11 kW
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1025-1AG24 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz110 V
3RT1025-1AG24 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1025-1AG24 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 63 A
Short-circuit coordination type 2, fusefuse gL/gG: 25 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1025-1AG24 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Side-by-side mountingYes
3RT1025-1AG24 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1025-1AG24 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1025-1AG24 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth140 mm

Product details

Rated for AC-4 duty at 15.5 A at 400 V, this contactor handles the high inrush of reversing or plugging motor applications where the contacts break under full load. For AC-2 at 400 V it carries 7.5 kW, covering slip-ring motor switching.

The screw terminals accept 2x (0.5 to 1.5 mm²) solid or 2x (0.75 to 2.5 mm²) stranded, with a maximum of 2x 4 mm², matching typical control wiring practices.

For standard AC-3 motor starts, the 500 V rating of 10 kW and 690 V rating of 11 kW cover most European 3-phase motor sizes up to 11 kW. Type 2 coordination requires a 25 A gL/gG fuse upstream (type 1 allows 63 A). This matters for selectivity studies — if your panel demands Type 2 coordination to minimize downtime after a fault, the 25 A fuse limit is the binding constraint. The 2000 m maximum altitude limit is standard for low-voltage gear; derate above that.

At 85 mm height and 140 mm depth, the S0 frame fits shallow enclosures. The screw terminals for the main circuit accept AWG 16 to 8, with two conductors per terminal allowed — useful for daisy-chaining power feeds. The 2 instantaneous auxiliary contacts (standard configuration) can be wired for status feedback or interlocking without an add-on block.

Frequently asked questions

What is the closest functional alternative if I cannot get the 3RT1025-1AG24?

The 3RT1017-1AP01 is a smaller S0 frame contactor with a 24 VDC coil, but it is rated for lower motor power (5.5 kW at 400 V AC-3 vs 10 kW for the 3RT1025-1AG24). It will not directly replace the 3RT1025-1AG24 without checking the load current — the 3RT1025-1AG24 carries a higher AC-3 rating.

What wire sizes does the 3RT1025-1AG24 accept?

Main circuit screw terminals accept 2x (0.5 to 1.5 mm²) solid, 2x (0.75 to 2.5 mm²) stranded, or up to 2x 4 mm². AWG equivalents are 2x (16 to 12) solid, 2x (14 to 10) stranded, or 1x 8.

Will the 3RT1025-1AG24 fit a panel designed for the 3RT1017-1AP01?

Both are S0 frame size with identical 45 mm width and DIN rail mounting, so the mechanical footprint is the same. However, the 3RT1025-1AG24 draws higher coil current (10 A vs lower on the 3RT1017-1AP01) and requires a 25 A Type 2 coordination fuse — verify the upstream protection and power supply before swapping.

MPN
3RT1025-1AG24