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Siemens 3RT1025-3KC80 — Contactors

Siemens SIRIUS 3RT1025-3KC80 Power Contactor, S0, 24 VDC, 10

MPN3RT1025-3KC80

Siemens SIRIUS power contactor, size S0, 3RT1025-3KC80, 24 VDC coil, screw-type terminals, varistor surge suppression, 45 mm width, snap-on 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

3RT1025-3KC80 — Identification
ParameterValue
Contactor frame sizeS0
3RT1025-3KC80 — 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
3RT1025-3KC80 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1025-3KC80 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1025-3KC80 — 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
3RT1025-3KC80 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.25 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.25 ... 1.5 mm²)
Side-by-side mountingYes
3RT1025-3KC80 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
3RT1025-3KC80 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1025-3KC80 — Mechanical
ParameterValue
Width45 mm
Height88 mm
Depth100 mm

Product details

In AC-3 duty (squirrel-cage motor starting) at 400 V, this contactor is rated for 7.5 kW; at 500 V it handles 10 kW, and at 690 V it reaches 11 kW.

Switching capacity on the coil side: 10 A at 24 V, 2 A at 60 V, 1 A at 110 V, 0.3 A at 220 V, 6 A at 230 V, 3 A at 400 V. The built-in varistor suppressor clips the inductive kick, which saves adding an external diode or RC snubber on the panel layout.

Coordination and fusing

For Type 2 coordination (limited contact damage, minimal downtime) it's gL/gG 25 A. That's the fuse the panel builder needs to spec — not the contactor's own rating.

Environmental and mounting limits

The contactor body carries IP20 on the front (finger-safe), while the terminals themselves are IP00 — so the panel enclosure provides the touch protection. Side-by-side mounting is permitted with 6 mm spacing at the side.

Termination details

Main circuit terminals are screw-type, accepting 2x (0.25 to 2.5 mm²) solid or 2x (1 to 2.5 mm²) stranded, with a maximum of 2x 10 mm². AWG equivalents: 2x (16 to 12) solid, 2x (14 to 10) stranded, or 1x 8. That covers standard panel wire sizes up to about 8 AWG for the power circuit.

Frequently asked questions

How do I get current pricing and availability for 3RT1025-3KC80?

Submit an RFQ through this listing. The part is sourced to order through independent distribution; availability and current pricing are confirmed at quote time.

What is 3RT1025-3KC80's depth?

The listed depth is 100 mm, with a width of 45 mm and height of 88 mm.

What compliance documentation does Siemens provide for 3RT1025-3KC80?

As a SIRIUS power contactor, it carries the standard Siemens industrial approvals (IEC, UL/CSA pending per variant). The varistor surge suppressor is integrated per the design. Specific RoHS/REACH declarations are available from Siemens upon request.

Will 3RT1025-3KC80 drop into a panel specified around 3RT1023-1AL20?

Both are size S0 contactors on the same 45 mm DIN-rail footprint, so the mechanical fit is identical. The main difference is the coil voltage — 3RT1025-3KC80 uses 24 VDC, while 3RT1023-1AL20 uses a different coil. Verify the control voltage before swapping.

MPN
3RT1025-3KC80