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Siemens 3RT1024-1BB40-ZW98 — Contactors

Siemens 3RT1024-1BB40-ZW98 SIRIUS Power Contactor, 24 VDC Co

MPN3RT1024-1BB40-ZW98

Siemens SIRIUS 3RT1024-1BB40-ZW98 power contactor, Size S0, 24 VDC coil 5.4 W hold, screw terminals, 45 mm wide, snap-on 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

3RT1024-1BB40-ZW98 — Identification
ParameterValue
Contactor frame sizeS0
3RT1024-1BB40-ZW98 — Ratings & Performance
ParameterValue
Rated operational current, AC-4 @ 400 V12.5 A
Rated value @ 400 V3 A
Rated value @ 500 V7.5 kW
Rated value @ 690 V7.5 kW
Rated value @ 230 V6 A
Rated value @ 24 V10 A
Rated value @ 60 V2 A
Rated value @ 110 V1 A
Rated value @ 220 V0.3 A
3RT1024-1BB40-ZW98 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RT1024-1BB40-ZW98 — Contacts & Poles
ParameterValue
Main poles3
Main NO contacts3
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RT1024-1BB40-ZW98 — Protection & Coordination
ParameterValue
Short-circuit coordination type 1, fusefuse gL/gG: 63 A
Short-circuit coordination type 2, fusefuse gL/gG: 25 A
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RT1024-1BB40-ZW98 — Connection & Mounting
ParameterValue
Main circuit connectionscrew-type terminals
Conductor cross-section, solid2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), max. 2x (0.75 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Side-by-side mountingYes
3RT1024-1BB40-ZW98 — Durability
ParameterValue
Durability (operating cycles, typ.)10 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RT1024-1BB40-ZW98 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
3RT1024-1BB40-ZW98 — Mechanical
ParameterValue
Width45 mm
Height85 mm
Depth101 mm

Product details

The Siemens SIRIUS 3RT1024-1BB40-ZW98 is a Size S0 power contactor with a 24 VDC magnet coil drawing 5.4 W for both closing and holding. It switches motor loads in AC-3 duty up to 7.5 kW at 400 V and 500 V, and handles AC-4 reversing duty at 12.5 A. The coil holds at 24 VDC nominal; dropout happens below the listed minimum operating threshold.

Accepts solid conductors 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). For stranded or multi-stranded wire, it takes 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), max 2x 10 mm². AWG equivalents: 2x (16 to 12), 2x (14 to 10), 1x 8. Short-circuit coordination: Type 2 requires a 25 A gL/gG fuse; Type 1 allows up to 63 A gL/gG.

Frequently asked questions

What are the key contact ratings for this contactor?

AC-3 motor switching: 7.5 kW at 400 V and 500 V, 7.5 kW at 690 V. AC-4 reversing duty: 12.5 A at 400 V. Resistive load (AC-1): 10 A at 24 V, 6 A at 230 V, 3 A at 400 V. Coil is 24 VDC, 5.4 W hold.

What is the physical size and mounting?

Size S0 frame: 45 mm wide, 85 mm high, 101 mm deep. Mounts via screw or snap-on onto 35 mm DIN rail per EN 50022. Side-by-side mounting allowed with 6 mm gap.

What wire sizes does it accept?

Solid: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), max 2x (0.75 to 4 mm²). Stranded: 2x (1 to 2.5 mm²), 2x (2.5 to 6 mm²), max 2x 10 mm². AWG: 2x (16 to 12), 2x (14 to 10), 1x 8. Screw-type terminals on main circuit.

MPN
3RT1024-1BB40-ZW98