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Siemens 3RT6026-1BB40 — Contactors

Siemens 3RT6026-1BB40 SIRIUS Power Contactor, 24 VDC Coil

MPN3RT6026-1BB40

Siemens SIRIUS 3RT6026-1BB40 power contactor, size S0, 24 VDC coil, screw-type terminals, for 35 mm DIN rail, rated 23 kW at 400 V AC-3e.

StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
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Specifications

Identification

3RT6026-1BB40 — Identification
ParameterValue
Contactor frame sizeS0

Ratings & Performance

3RT6026-1BB40 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 690 V1 A
Rated value @ 230 V10 A
Rated value @ 24 V6 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A

Control & Coil

3RT6026-1BB40 — Control & Coil
ParameterValue
Control supply voltage typeDC

Contacts & Poles

3RT6026-1BB40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)

Protection & Coordination

3RT6026-1BB40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 100 A
Short-circuit coordination type 2, fusegL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 35 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A

Connection & Mounting

3RT6026-1BB40 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Aux. / control circuit connectionscrew-type terminals
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 50022
Side-by-side mountingYes

Durability

3RT6026-1BB40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000

Environmental

3RT6026-1BB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m

Mechanical

3RT6026-1BB40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth107 mm

Specifications

3RT6026-1BB40 — Specifications
ParameterValue
At AC5 000 1/h

Product details

Its 24 VDC coil draws 6 A at the rated value, so the control-circuit supply must be sized for that inrush — a standard 24 VDC power supply handles it, but a marginal one may drop out during pickup. The contactor is rated for AC-3e duty at 23 kW at 400 V and 40 kW at 690 V, meaning it switches standard squirrel-cage motors up to those power levels under full load.

The headline AC-3e rating of 23 kW at 400 V (at 60 °C ambient) is the figure that governs motor switching for most European and Asian 400 V line supplies. At 690 V the same contactor handles 40 kW, and at 230 V it manages 13.3 kW. These are the practical limits for starting and stopping induction motors under load — exceed them and the contacts may weld or wear prematurely. For resistive loads (AC-1) the contactor can switch at up to 1,000 operations per hour, while motor loads (AC-3) max out at 750 ops/h and the more severe plugging/inching duty (AC-4) at 250 ops/h. The DC switching capacity is lower: 1,500 ops/h. These limits are thermal — the contactor needs time to dissipate arc heat between operations.

The 45 mm width (S0 frame) fits a standard 9 mm-module DIN rail grid — it occupies 5 modules. Depth is 107 mm, height 85 mm. Main and control circuits use screw-type terminals accepting 2x (0.5…1.5 mm²) solid/stranded or 2x (0.75…2.5 mm²), with AWG equivalents of 2x (16…12) or 2x (14…8). Minimum conductor size at 40 °C or 60 °C is 10 mm² for the main circuit.

Frequently asked questions

What is the equivalent or replacement for the 3RT6026-1BB40?

The closest functional peer is the 3RT6026-1BM40, which shares the same S0 frame, AC-3e power ratings, and screw terminals but uses a different coil voltage. The 3RT6026-1AN20 and 3RT6023-1BW40 are also in the same SIRIUS family but differ in coil voltage or frame size. Verify your control voltage before substituting.

How do I mount the 3RT6026-1BB40 contactor?

It snaps onto a 35 mm DIN rail per DIN EN 50022, or can be screw-mounted. Side-by-side mounting is allowed. The unit can be rotated ±180° on a vertical surface and tilted ±22.5° forward or backward.

MPN
3RT6026-1BB40