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Siemens 3RT2026-1FB40 — Contactors

Siemens 3RT2026-1FB40 SIRIUS Power Contactor, 24 VDC Coil, S

MPN3RT2026-1FB40
Active

Siemens SIRIUS power contactor, Size S0, 24 V DC coil, screw-type terminals, screw and snap-on mounting for 35 mm DIN rail (DIN EN 60715).

$68.58Ref. price · indicative, final on quote
Siemens 3RT2026-1FB40 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT2026-1FB40 — Identification
ParameterValue
Contactor frame sizeS0
3RT2026-1FB40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V15.5 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V3 hp
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2026-1FB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2026-1FB40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2026-1FB40 — 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 — 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 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2026-1FB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2026-1FB40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth107 mm

Product details

SIRIUS 3RT2026-1FB40 — Size S0 Power Contactor, 24 V DC Coil

The coil is rated 24 V DC, pulling in at 0.8 x rated voltage (19.2 V) and holding reliably across the operating range of -25 to +60 °C. The contactor mounts on a 35 mm DIN rail per DIN EN 60715, with screw and snap-on fastening, and can be rotated ±180° on a vertical surface or tilted ±22.5° forward/backward for tight panel layouts.

Switching Frequency & Duty Cycles

Maximum switching frequency depends on the duty class: 1,000 operations per hour at AC-1 (resistive), 750/h at AC-2 and AC-3 (motor starting/running), and 250/h at AC-4 (plugging/inching). The AC-3e rating also caps at 750/h. For a conveyor or pump running continuous start/stop cycles, the AC-3 figure is the practical limit; the AC-4 derating matters if the contactor sees reversing or jogging duty.

These spacings ensure adequate ventilation and arc-quenching volume — skimping on the side clearance risks flashover between adjacent contactors in a dense panel.

Termination & Wiring

Auxiliary contacts (the contactor includes an auxiliary switch) accept 2 x (0.5 to 1.5 mm²) or 2 x (0.75 to 2.5 mm²) solid or stranded. The coil connection uses screw-type terminals.

Frequently asked questions

What is 3RT2026-1FB40's depth?

The depth is 107 mm, with a width of 45 mm and height of 85 mm.

What wire sizes does the 3RT2026-1FB40 accept?

Main contacts accept solid or stranded 1 to 10 mm². Auxiliary contacts accept 2 x (0.5 to 1.5 mm²) or 2 x (0.75 to 2.5 mm²).

Where can I buy 3RT2026-1FB40?

This part is sourced to order through independent distribution. Submit an RFQ for current availability and pricing.

Will 3RT2026-1FB40 drop into a panel specified for 3RT2015-1BW42?

Both are Size S0 contactors on the same 45 mm DIN-rail footprint, so the mechanical fit is identical. The key difference is the coil voltage — the 3RT2026-1FB40 uses a 24 V DC coil, while the 3RT2015-1BW42 uses a different coil voltage. Verify the control circuit voltage before swapping.

MPN
3RT2026-1FB40