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Siemens 3RT2026-2BW40 — Contactors

Siemens 3RT2026-2BW40 SIRIUS Power Contactor, S0 Size, 48 VD

MPN3RT2026-2BW40
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Siemens SIRIUS 3RT2026-2BW40 power contactor, size S0, 48 VDC coil, spring-type terminals, screw and snap-on mounting for 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

3RT2026-2BW40 — Identification
ParameterValue
Contactor frame sizeS0
3RT2026-2BW40 — 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
3RT2026-2BW40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2026-2BW40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2026-2BW40 — 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)
3RT2026-2BW40 — Connection & Mounting
ParameterValue
Main circuit connectionspring-loaded terminals
Aux. / control circuit connectionspring-loaded terminals
Conductor cross-section, solid1 ... 10 mm²
Conductor cross-section, solid or stranded2x (0.5 ... 2.5 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 60715
Side-by-side mountingYes
3RT2026-2BW40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2026-2BW40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2026-2BW40 — Mechanical
ParameterValue
Width45 mm
Height102 mm
Depth107 mm

Product details

Spring-type terminals on the magnet coil accept solid or stranded wire from 1 to 10 mm², and dual-wire entry (2x 0.5 to 2.5 mm²) is supported for daisy-chaining control wiring. This saves a terminal block row in dense panels.

At 400 V, it switches 3 A, suitable for smaller three-phase motors or resistive heater banks. DC switching capability at 48 V is 2 A, which matters if you're breaking DC control circuits or small DC motor loads — the arc extinguishes differently than AC, so this rating is the one to check for DC applications. Maximum mechanical life is 10 million operations, with electrical life depending on load category: 1000 cycles/hour at AC-1 (resistive), 750 at AC-3 (motor running), and 250 at AC-4 (plugging/inching). Arcing time is 10 ms, and DC operating time (pull-in/drop-out) is 15 to 17.5 ms — fast enough for most sequencing but worth noting if your safety circuit requires a specific break time.

Panel Integration and Clearance

Dimensions are 45 mm wide, 102 mm high, and 107 mm deep — the S0 frame fits in a standard 45 mm slot on the DIN rail, leaving room for adjacent contactors or overload relays. These ensure proper ventilation and wiring access; skimping on side clearance when mounting multiple contactors side-by-side can trap heat. This helps when fitting into angled sub-panels or tight enclosures where a flat vertical mount isn't possible.

This covers most indoor industrial environments; for outdoor cabinets in direct sun, verify the internal enclosure temperature stays under 60 °C.

Frequently asked questions

What are the key dimensions for panel fit?

Width is 45 mm, height 102 mm, depth 107 mm. Required clearances: 10 mm up, 10 mm down, 10 mm forward, 6 mm at sides.

What wire sizes does the spring terminal accept?

Solid or stranded wire from 1 to 10 mm². Dual-wire entry accepts 2x 0.5 to 2.5 mm² for looping control wiring.

What is the DC switching capacity at 48 V?

Rated at 2 A at 48 V DC. This is the figure to use when switching DC loads — AC ratings don't apply.

Does it include an auxiliary switch?

Yes, an auxiliary switch is built in, providing feedback for status indication or interlocking circuits.

MPN
3RT2026-2BW40