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Siemens 3RT2026-1FB40-1KS0 — Contactors

Siemens 3RT2026-1FB40-1KS0 SIRIUS Power Contactor, 35A, 24VD

MPN3RT2026-1FB40-1KS0

Siemens SIRIUS, power contactor, 3RT2026-1FB40-1KS0, S0 frame, 35 A at 24 V DC rated value, 4.4 kW at 400 V, screw-type terminals, auxiliary switch, snap-on DIN rail mounting.

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

3RT2026-1FB40-1KS0 — Identification
ParameterValue
Contactor frame sizeS0
3RT2026-1FB40-1KS0 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V15.5 A
Rated value @ 400 V4.4 kW
Rated value @ 500 V11 kW
Rated value @ 690 V7.7 kW
Rated value @ 230 V3 hp
Rated value @ 24 V35 A
Rated value @ 60 V35 A
Rated value @ 110 V35 A
Rated value @ 220 V10 A
3RT2026-1FB40-1KS0 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2026-1FB40-1KS0 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2026-1FB40-1KS0 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 100 A (690 V, 100 kA), aM: 50 A (690 V, 100 kA), BS88: 100 A (415 V, 80 kA)
Short-circuit coordination type 2, fusegG: 35A (690V, 100kA), aM: 20A (690V, 100kA), BS88: 35A (415V, 80kA)
Aux. switch short-circuit protection, fusegG: 10 A (500 V, 1 kA)
3RT2026-1FB40-1KS0 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid1 ... 10 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mountingYes
3RT2026-1FB40-1KS0 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2026-1FB40-1KS0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2026-1FB40-1KS0 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth107 mm

Product details

The Siemens SIRIUS 3RT2026-1FB40-1KS0 is a Size S0 power contactor rated for 35 A at 24 V DC and 4.4 kW motor load at 400 V AC. The 24 V DC coil pulls in reliably down to 0.9× rated voltage and drops out cleanly; the screw-type coil terminals accept up to 2.5 mm² stranded. An integrated auxiliary switch is included, saving a separate block on the DIN rail.

Duty-cycle limits and mounting

Switching frequency caps at 1 000 operations per hour for AC-1 resistive loads, 750/h for AC-2 and AC-3 motor duty, and 250/h for AC-4 plugging/reversing.

Frequently asked questions

What is the motor rating for 3RT2026-1FB40-1KS0?

It is rated for 4.4 kW at 400 V AC, which covers common 4-pole induction motors in that power band. The DC rating is 35 A at 24 V for resistive loads.

Where can I buy 3RT2026-1FB40-1KS0?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — send the RFQ for a firm position.

What are the switching frequency limits on this contactor?

Maximum 1 000 operations per hour for AC-1 resistive loads, 750/h for AC-2 and AC-3 motor duty, and 250/h for AC-4 plugging/reversing. These are the contactor's thermal limits, not the coil's.

Does this contactor include an auxiliary switch?

Yes, an auxiliary switch is integrated into the base unit, eliminating the need for a separate add-on block for basic feedback or interlocking.

MPN
3RT2026-1FB40-1KS0