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Siemens 3RA2318-8XB30-1AP0 — Motor Starters

Siemens 3RA2318-8XB30-1AP0 SIRIUS Reversing Contactor

MPN3RA2318-8XB30-1AP0
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Siemens SIRIUS 3RA2318-8XB30-1AP0 reversing contactor assembly, size S00, 7.5 kW at 400 V AC-3, screw terminals, 35 mm DIN rail mount.

Siemens 3RA2318-8XB30-1AP0 datasheet (PDF)
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

3RA2318-8XB30-1AP0 — Identification
ParameterValue
Product designationReversing contactor assembly
Main circuit poles3
BrandSIRIUS
Reference designation (IEC 81346-2)Q
3RA2318-8XB30-1AP0 — Ratings & Performance
ParameterValue
Rated motor power at 400 V7.5 kW
Rated motor power at 460/480 V (hp)10 hp
Rated motor power at 575/600 V (hp)10 hp
Rated current at 480 V14 A
Rated current at 600 V11 A
3RA2318-8XB30-1AP0 — Contacts & Control
ParameterValue
Rated voltage range at 50 Hz230 V
Control supply voltage typeAC
Auxiliary switch extensionYes
3RA2318-8XB30-1AP0 — Communication
ParameterValue
AS-Interface protocol supportNo
3RA2318-8XB30-1AP0 — Mechanical & Connection
ParameterValue
Main contact conductor range (AWG)2x (20 ... 16), 2x (18 ... 14)
Mounting / fastening methodscrew and snap-on mounting onto 35 mm standard mounting rail
Mounting position+/-180° rotation possible on vertical mounting surface; can be tilted forward and backward by +/- 22.5° on vertical mounting surface
Width90 mm
Height68 mm
Depth73 mm
3RA2318-8XB30-1AP0 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C

Product details

Motor ratings and AC-3 duty across voltages

The 3RA2318-8XB30-1AP0: For AC-4 duty (plugging, inching) at 400 V, the rating drops to 5.5 kW — a typical derating for reversing applications where the contactor breaks stalled rotor current.

Clearance around the assembly: 6 mm upwards, forwards, downwards, and to the side; 0 mm backwards — so it can sit flush against a backplane.

Environmental and compliance

Shock resistance is rated at 11.4 g for 5 ms and 7.3 g for 10 ms on both AC and DC supplies — robust enough for machine-mounted applications near presses or conveyors. RoHS compliance date is 10/01/2009 — the assembly meets EU substance restrictions for the current production run.

Frequently asked questions

What compliance documentation does Siemens provide for 3RA2318-8XB30-1AP0?

Standard Siemens documentation includes the CE declaration and manufacturer's declaration for the SIRIUS series.

MPN
3RA2318-8XB30-1AP0