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Siemens 3RT1026-3KF80 — Contactors

Siemens 3RT1026-3KF80 SIRIUS Power Contactor, S0, 15.5 A AC-

MPN3RT1026-3KF80

Siemens SIRIUS S0 power contactor, 3RT1026-3KF80, AC-4 15.5 A at 400 V, screw terminals, varistor, snap-on DIN rail.

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

3RT1026-3KF80 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-3KF80 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V15.5 A
Rated value @ 400 V3 A
Rated value @ 500 V11 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
3RT1026-3KF80 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1026-3KF80 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-3KF80 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 100 A
Short-circuit coordination type 2, fusefuse gL/gG: 35 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1026-3KF80 — 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
3RT1026-3KF80 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
3RT1026-3KF80 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1026-3KF80 — Mechanical
ParameterValue
Width45 mm
Height88 mm
Depth100 mm

Product details

It carries a 15.5 A AC-4 rating at 400 V, which is the duty cycle for reversing or inching a motor where the contacts make and break under full load. The built-in varistor surge suppressor clamps the coil flyback spike, so you don't need an external snubber on the control wiring. Saves a DIN-rail slot and a wiring step.

Side-by-side mounting is allowed, with a 6 mm gap to adjacent devices for cooling. Main circuit terminals are screw-type, accepting 2x (0.25...2.5 mm²) solid or 2x (1...2.5 mm²) stranded, up to 2x 10 mm² max. That's enough for the 15.5 A AC-4 path without piggyback lugs.

Frequently asked questions

What is the closest functional second-source to the 3RT1026-3KF80?

The 3RT1015-1BB42 is a smaller S0 contactor (AC-3 rated 7 A at 400 V) but shares the same frame and DIN-rail footprint. It will not drop in for the 15.5 A AC-4 duty of the 3RT1026-3KF80 without derating the load. For a direct swap on the same motor circuit, stick with the 3RT1026-3KF80.

What is the 3RT1026-3KF80's depth?

100 mm, measured from the DIN-rail mounting surface to the front of the housing.

What solid wire sizes does the 3RT1026-3KF80 accept?

Main terminals accept 2x (0.25...2.5 mm²) solid conductors per terminal.

Will the 3RT1026-3KF80 drop into a panel specified around the 3RT1015-1BB42 without rewiring?

Mechanically yes — same S0 frame, same 45 mm width, same DIN-rail clip. Electrically no — the 3RT1026-3KF80 draws higher coil power (4.2 W holding) and switches higher current. Verify the control transformer VA and the motor circuit protection before swapping.

MPN
3RT1026-3KF80