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Siemens 3RT1025-1CP04-0KV0 — Contactors

Siemens 3RT1025-1CP04-0KV0 SIRIUS Power Contactor, S0, 7.5 k

MPN3RT1025-1CP04-0KV0

Siemens SIRIUS, power contactor, size S0, 3RT1025-1CP04-0KV0, 7.5 kW at 400 V AC-2, 15.5 A AC-4, 10 A AC-12, screw terminals, built-in varistor, IP20 front.

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

3RT1025-1CP04-0KV0 — Identification
ParameterValue
Contactor frame sizeS0
3RT1025-1CP04-0KV0 — 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
3RT1025-1CP04-0KV0 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz230 V
3RT1025-1CP04-0KV0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1025-1CP04-0KV0 — 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
3RT1025-1CP04-0KV0 — 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
3RT1025-1CP04-0KV0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1025-1CP04-0KV0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1025-1CP04-0KV0 — Mechanical
ParameterValue
Width45 mm
Height88 mm
Depth140 mm

Product details

The Siemens SIRIUS 3RT1025-1CP04-0KV0 is a size S0 power contactor rated for motor switching at 7.5 kW at 400 V AC-2 (cites:) and 15.5 A at 400 V AC-4 (cites:), with a maximum AC-12 resistive switching current of 10 A (cites:). It carries a built-in varistor surge suppressor (cites:) and terminates through screw-type terminals (cites:). The front face is IP20 rated (cites:); the wiring compartment is IP00 (cites:).

The 45 mm width (cites:) and 88 mm height (cites:) fit standard S0 footprint. Depth is 140 mm (cites:).

Wiring and terminal data

Main contact terminals accept 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), or max 2x 10 mm² single or multi-stranded wire (cites:); AWG equivalents are 2x (16 to 12), 2x (14 to 10), or 1x 8 (cites:). Solid wire sizes are 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) (cites:). For type 2 coordination, use a gL/gG 25 A fuse; for type 1, a gL/gG 63 A fuse (cites:,).

Environmental and service conditions

Pollution degree 3 (cites:) suits industrial environments with conductive contamination.

Frequently asked questions

Where can I buy 3RT1025-1CP04-0KV0 and how do I get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

What is the closest functional second-source to 3RT1025-1CP04-0KV0?

The 3RT1023-1AL20 and 3RT1016-1AR11 are peer MPNs in the same SIRIUS S0 family, but the 3RT1025-1CP04-0KV0 carries a built-in varistor and specific AC-2/AC-4 ratings that may differ from those peers. Verify the duty ratings and auxiliary configuration before substituting.

What is 3RT1025-1CP04-0KV0's listed depth?

The depth is 140 mm (cites:).

What is the solid wire capacity of 3RT1025-1CP04-0KV0?

Solid wire sizes accepted are 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or max 2x (0.75 to 4 mm²) (cites:).

Will 3RT1025-1CP04-0KV0 drop into a panel specified around 3RT1023-1AL20 without rewiring?

Both are S0 size on a 45 mm DIN-rail footprint, so the physical mount and terminal layout are the same. However, the 3RT1025-1CP04-0KV0 has a built-in varistor and different AC-2/AC-4 ratings; verify the coil voltage and auxiliary contact configuration match your circuit before swapping.

What compliance documentation does Siemens provide for 3RT1025-1CP04-0KV0?

The part is part of the SIRIUS family and is typically covered by Siemens declarations of conformity for RoHS, REACH, and applicable IEC/EN standards. Specific certificates (UL, CSA, etc.) should be confirmed from the manufacturer's documentation for this exact order code.

MPN
3RT1025-1CP04-0KV0