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Siemens 3RT2316-1BM40 SIRIUS Contactor, 9 A AC-3

MPN3RT2316-1BM40

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Siemens SIRIUS 3RT2316-1BM40 contactor, size S00, 9 A at 400 V AC-3, 4 kW motor rating, screw-type terminals, 45 mm width, 73 mm depth, 58 mm height, DIN rail mount.

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Siemens 3RT2316-1BM40 datasheet (PDF)

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RT2316-1BM40 — Identification
Parameter	Value
Contactor frame size	S00

3RT2316-1BM40 — Ratings & Performance
Parameter	Value
Rated operational current, AC-4 @ 400 V	4 kW
Rated value @ 400 V	9 A

3RT2316-1BM40 — Control & Coil
Parameter	Value
Control supply voltage type	DC

3RT2316-1BM40 — Contacts & Poles
Parameter	Value
Main poles	4
Main NO contacts	4

3RT2316-1BM40 — Protection & Coordination
Parameter	Value
Short-circuit coordination type 1, fuse	gG: 35 A (690 V, 100 kA)
Short-circuit coordination type 2, fuse	gG: 20 A (690 V, 100 kA)
Aux. switch short-circuit protection, fuse	gG: 10 A (690 V, 1 kA)

3RT2316-1BM40 — Connection & Mounting
Parameter	Value
Main circuit connection	screw-type terminals
Aux. / control circuit connection	screw-type terminals
Conductor cross-section, solid	2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Conductor cross-section, solid or stranded	2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²
Conductor cross-section, finely stranded w/ ferrule	2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting method	screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Side-by-side mounting	Yes

3RT2316-1BM40 — Durability
Parameter	Value
Durability (operating cycles, typ.)	30 000 000
Durability with aux. switch block (cycles, typ.)	10 000 000

3RT2316-1BM40 — Environmental
Parameter	Value
Operating temperature range	-25 ... +60 °C
Storage temperature range	-55 ... +80 °C
Installation altitude, max.	2 000 m

3RT2316-1BM40 — Mechanical
Parameter	Value
Width	45 mm
Height	58 mm
Depth	73 mm

Product details

Motor-switching capacity at 400 V

The 3RT2316-1BM40 is a SIRIUS contactor in size S00, rated 9 A at 400 V in AC-3 duty, which translates to a 4 kW motor-switching capability at that voltage. This is the figure that governs the real motor load it can handle — a 4 kW three-phase induction motor at 400 V draws roughly 8.5 A full-load, so the contactor sits just above that line, provided the starting current and duty cycle stay within the AC-3 envelope.

Termination and conductor sizes

Both the main current circuit and the magnet coil use screw-type terminals. For a panel builder wiring a 4 kW motor circuit, the 4 mm² stranded capacity covers the full-load conductors without needing a separate terminal block.

Frequently asked questions

What is the 3RT2316-1BM40's motor-switching rating at 400 V?

The contactor is rated 9 A at 400 V in AC-3 duty, corresponding to a 4 kW motor-switching capability. This is the AC-3 rating that governs real motor load switching, not the thermal continuous current.