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Siemens 3RT1026-1DB44-0KV0 — Contactors

Siemens 3RT1026-1DB44-0KV0 SIRIUS Power Contactor, 24 VDC, 1

MPN3RT1026-1DB44-0KV0

Siemens SIRIUS 3RT1026-1DB44-0KV0 power contactor, size S0, 24 V DC coil, 11 kW at 400 V AC-2, 15.5 A at 400 V AC-4, built-in varistor surge suppression, screw terminals, 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

3RT1026-1DB44-0KV0 — Identification
ParameterValue
Contactor frame sizeS0
3RT1026-1DB44-0KV0 — 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
3RT1026-1DB44-0KV0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1026-1DB44-0KV0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1026-1DB44-0KV0 — 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
3RT1026-1DB44-0KV0 — 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
3RT1026-1DB44-0KV0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1026-1DB44-0KV0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1026-1DB44-0KV0 — Mechanical
ParameterValue
Width45 mm
Height88 mm
Depth150 mm

Product details

The Siemens 3RT1026-1DB44-0KV0 is a SIRIUS power contactor in frame size S0, rated for switching motor loads up to 11 kW at 400 V in AC-2 duty (slip-ring motors, reversing) and 15.5 A at 400 V in AC-4 duty (plugging, inching). The 24 V DC magnet coil draws 5.4 W closing and holding, with a built-in varistor surge suppressor across the coil — no external snubber needed for DC switching. Screw-type terminals on the main circuit accept up to 2x 10 mm² stranded or 2x 4 mm² solid, and the two instantaneous auxiliary contacts (1 NO + 1 NC) are rated 10 A at 24 V.

The 45 mm wide, 88 mm tall, 150 mm deep footprint fits standard S0 panel layouts. Side-by-side mounting is allowed with zero gap — no derating required for adjacent units.

For Type 1 coordination (contactor may need replacement) the fuse can be 100 A gL/gG.

This part carries a current lifecycle status. No official successor order code is recorded — this remains the active catalog number for the S0 24 VDC contactor with built-in varistor.

Frequently asked questions

Where can I buy 3RT1026-1DB44-0KV0 and get a price?

This part is sourced to order against an RFQ through independent distribution. Submit an RFQ for current pricing and availability — confirmed at quote time.

What is the closest functional alternative to 3RT1026-1DB44-0KV0?

The 3RT1023-1AL20 is a smaller S0 frame contactor but with a 24 V AC coil and a different auxiliary contact configuration. It will not drop into the same panel without rewiring the coil supply and checking the auxiliary contact count. The 3RT1016-1AR11 and 3RT1015-1BB42 are also S0 but with different coil voltages and auxiliary arrangements. For a direct functional match with the 24 V DC coil and built-in varistor, the 3RT1026-1DB44-0KV0 is the active catalog number.

What are the key ratings for this contactor?

AC-2 motor rating: 11 kW at 400 V. AC-4 rating: 15.5 A at 400 V. Coil: 24 V DC, 5.4 W. Auxiliary contacts: 2 instantaneous (1 NO + 1 NC), rated 10 A at 24 V. Built-in varistor surge suppressor.

What compliance documentation does Siemens provide for this part?

As a current SIRIUS product, it carries CE marking for the European market and is designed to meet relevant IEC/EN standards. Specific documentation (RoHS, REACH, UL file) is available through Siemens Industry Online Support or upon request with the RFQ.

MPN
3RT1026-1DB44-0KV0