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Siemens 3RT1026-1CD25 — Contactors

Siemens 3RT1026-1CD25 SIRIUS Power Contactor, S0 Frame, 15.5

MPN3RT1026-1CD25

Siemens SIRIUS, power contactor, 3RT1026-1CD25, S0 frame, screw terminals, AC-4 15.5 A at 400 V, snap-on 35 mm 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

3RT1026-1CD25 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-1CD25 — 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
3RT1026-1CD25 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz42 V
3RT1026-1CD25 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-1CD25 — 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
3RT1026-1CD25 — 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
3RT1026-1CD25 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-1CD25 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1026-1CD25 — Mechanical
ParameterValue
Width55 mm
Height88 mm
Depth91 mm

Product details

Rated for AC-4 duty at 15.5 A at 400 V, this contactor handles the severe switching conditions of plugging, inching, and reversing motor starts where the contacts make and break full locked-rotor current.

Screw-type terminals on the main circuit accept 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), or up to 2x (0.75 to 4 mm²) solid/stranded, plus AWG equivalents. The auxiliary contact block is a single instantaneous contact (1 NO/NC configurable). Side-by-side mounting is allowed with a 6 mm spacing to adjacent devices, keeping DIN-rail density practical. Pollution degree 3 means it tolerates conductive pollution typical of industrial control rooms — no special coating required.

Frequently asked questions

What are the key ratings for this contactor?

AC-4 at 400 V is 15.5 A — that is the rating for motor reversing and inching duty. AC-2 at 400 V is 11 kW. The auxiliary contact handles 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V. Coil voltage is 42 V at 50/60 Hz.

What compliance documentation is available for this contactor?

The part carries the SIRIUS brand and is designed to IEC/EN 60947-4-1 standards. Typical documentation includes a CE declaration of conformity, RoHS/REACH compliance statements, and a UL/CSA file for the US/Canadian markets. Specific cert numbers are on the product label.

MPN
3RT1026-1CD25