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Siemens 3RT1025-1AL24 — Contactors

Siemens 3RT1025-1AL24 SIRIUS Power Contactor, 7.5 kW AC-2

MPN3RT1025-1AL24

Siemens SIRIUS power contactor, Size S0, 3RT1025-1AL24, 7.5 kW at 400 V AC-2, 15.5 A AC-4, screw terminals, IP20 front, 24 VDC coil.

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

3RT1025-1AL24 — Identification
ParameterValue
Contactor frame sizeS0
3RT1025-1AL24 — 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 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
3RT1025-1AL24 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz230 V
3RT1025-1AL24 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1025-1AL24 — 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
3RT1025-1AL24 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control 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, solid or stranded2x (1 ... 2,5 mm²), 2x (2,5 ... 6 mm²), max. 2x 10 mm²
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Side-by-side mountingYes
3RT1025-1AL24 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1025-1AL24 — Environmental
ParameterValue
Installation altitude, max.2 000 m
3RT1025-1AL24 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth140 mm

Product details

For reversing or plugging duty (AC-4), it carries 15.5 A at 400 V — that's the rating that governs frequent inching or reversing applications where the contacts break full motor current.

Pollution degree 3 (conductive pollution) suits it for industrial environments where occasional condensation or light dust is present. Type 1 coordination requires a 63 A gL/gG fuse upstream; Type 2 coordination needs a 25 A gL/gG fuse. That distinction matters for selectivity: Type 2 leaves the contactor operational after a short-circuit, while Type 1 allows the contactor to be damaged but clears the fault. Pick your fuse per the coordination class your panel design specifies. IP20 on the front protects against finger contact; IP00 at the terminals means the connection area must be inside a closed enclosure. The screw-type terminals on both main and auxiliary circuits accept solid or stranded copper: main terminals take 2x (1 to 2.5 mm²) or up to 2x 10 mm² max, auxiliary terminals take 2x (0.5 to 1.5 mm²) or up to 2x 4 mm² max. That covers most panel wiring from 16 AWG down to 8 AWG for the mains.

Substance prohibition per RoHS applies from 01.07.2006. Verify UL/CSA certification for your jurisdiction at quote.

The 45 mm width and 85 mm height fit the S0 footprint. Depth is 140 mm. Side-by-side mounting is permitted. Coil ratings at other voltages: 2 A at 60 VDC, 1 A at 110 VDC, 0.3 A at 220 VDC, 6 A at 230 VAC, 3 A at 400 VAC. The coil operates on 50 Hz or 60 Hz with a tolerance band of 0.8 to 1.1 times nominal at 50 Hz and 0.85 to 1.1 at 60 Hz. That means the coil pulls in reliably even if the control supply sags to 80% of nominal at 50 Hz.

MPN
3RT1025-1AL24