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Siemens 3RT2326-1BB40 — Contactors

Siemens 3RT2326-1BB40 SIRIUS Contactor, S0, 24 V DC, Aux Swi

MPN3RT2326-1BB40
Active

Siemens SIRIUS 3RT2326-1BB40, S0 size contactor, 24 V DC coil, screw-type terminals, integrated auxiliary switch.

$293.77Ref. price · indicative, final on quote
Siemens 3RT2326-1BB40 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT2326-1BB40 — Identification
ParameterValue
Contactor frame sizeS0
3RT2326-1BB40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated operational current, AC-4 @ 400 V7.5 kW
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V10 A
Rated value @ 24 V10 A
Rated value @ 60 V6 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT2326-1BB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT2326-1BB40 — Contacts & Poles
ParameterValue
Main poles4
Main NO contacts4
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT2326-1BB40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegG: 63 A (690 V, 100 kA)
Short-circuit coordination type 2, fusegG: 20 A (690 V, 100 kA)
Aux. switch short-circuit protection, fusegG: 10 A (690 V, 1 kA)
3RT2326-1BB40 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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
3RT2326-1BB40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT2326-1BB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT2326-1BB40 — Mechanical
ParameterValue
Width60 mm
Height85 mm
Depth107 mm

Product details

Mounting and wiring – panel-fitting notes

Clearance minimums: 10 mm upward/downward, 6 mm sideways – typical for a contactor that shares a DIN rail with breakers or relays. Main power terminals accept stranded wire up to 10 mm²; auxiliary and coil terminals accept solid 0.5–1.5 mm² or stranded 0.75–2.5 mm². All are screw-type terminals (Pozidriv).

Lifecycle and supply posture

This is a current-production item. It is quoted against a BOM line through standard Siemens distribution. If you are freezing a panel design, this part will be available for future batches.

Frequently asked questions

What is the depth of the 3RT2326-1BB40?

The depth is listed as 107 mm. Combined with the 85 mm height and 60 mm width, it fits the standard S0 DIN-rail footprint.

What solid wire sizes does the 3RT2326-1BB40 accept on its auxiliary and coil terminals?

The auxiliary and coil terminals accept solid wire: 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²). Main terminals accept stranded wire up to 10 mm².

MPN
3RT2326-1BB40