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Siemens 3RT6024-1BB40 — Contactors

Siemens 3RT6024-1BB40 SIRIUS Power Contactor, 24 V DC Coil

MPN3RT6024-1BB40

Siemens SIRIUS 3RT6024-1BB40 power contactor, Size S0, 24 V DC coil, 45 mm width, 23 kW at 400 V AC-3, screw terminals, DIN rail mount.

Siemens 3RT6024-1BB40 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT6024-1BB40 — Identification
ParameterValue
Contactor frame sizeS0
3RT6024-1BB40 — 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
3RT6024-1BB40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT6024-1BB40 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT6024-1BB40 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusegL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 63 A
Short-circuit coordination type 2, fusegL/gG LV HRC 3NA, DIAZED 5SB, NEOZED 5SE: 25 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT6024-1BB40 — 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
3RT6024-1BB40 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT6024-1BB40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RT6024-1BB40 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth107 mm

Product details

Panel fit and motor ratings

The 3RT6024-1BB40: Depth is 107 mm, so verify the enclosure depth clears the wiring ducts and the coil terminals. At 400 V AC-3 duty this contactor switches 23 kW motor loads at 60 °C ambient — the rating already includes the thermal derating, so no extra headroom calculation is needed for a warm panel. At 690 V AC-3 it handles 40 kW, covering 480 V and 575 V systems common in North American installs.

The terminal layout is standard for S0 — no special torque driver needed beyond the usual 1.2 Nm for the power terminals.

RoHS compliance dated 05/01/2012 covers EU substance restrictions. Pollution degree 3 rating means it tolerates conductive pollution in industrial environments — no conformal coating required for most panel conditions.

Frequently asked questions

What motor power can 3RT6024-1BB40 switch at 400 V?

At 400 V AC-3 duty and 60 °C ambient, it is rated for 23 kW. The rating already includes thermal derating, so no extra margin is needed for a warm enclosure.

What is the width and depth of this contactor?

Width is 45 mm (standard S0 frame), depth is 107 mm. The 45 mm width allows side-by-side mounting with no gap between units on the DIN rail.

Does this contactor have an auxiliary switch option?

Yes, the product extension for auxiliary switches is supported — you can add a side-mounted auxiliary contact block to the S0 frame without increasing the panel width.

MPN
3RT6024-1BB40