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Siemens 3RK1304-5KS40-4AA0 — Remote I/O & Fieldbus Modules

Siemens 3RK1304-5KS40-4AA0 Motor Starter, IP65, Trip Class 1

MPN3RK1304-5KS40-4AA0
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Siemens SIMATIC motor starter 3RK1304-5KS40-4AA0, direct starter, 24 V DC, IP65, trip class 10, 150x110x230 mm.

$122.22Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RK1304-5KS40-4AA0 — Identification
ParameterValue
Product designationMotor starters
Product designdirect starter
3RK1304-5KS40-4AA0 — Communication
ParameterValue
PROFIBUS DP supportYes
PROFINET supportYes
AS-Interface supportNo
Bus communicationYes
3RK1304-5KS40-4AA0 — I/O
ParameterValue
Digital inputs0
Digital input signals0
Digital output signals0
Digital inputs parameterizableNo
Digital outputs parameterizableNo
3RK1304-5KS40-4AA0 — Electrical
ParameterValue
Rated value (DC)20.4 ... 28.8 V
Control supply voltage typeDC
Rated surge voltage6 kV
Voltage typeAC
Adjustable Current Response Value Current Of The Current-Dependent Overload Release0.15 ... 2 A
Operating Voltage Rated Value200 ... 400 V
Number Of Poles For Main Current Circuit3
3RK1304-5KS40-4AA0 — Environmental
ParameterValue
Ingress protection (IP)IP65
Operating temperature range-25 ... +55 °C
Storage temperature range-40 ... +70 °C
Shock resistance15g / 11 ms
Pollution degree3
3RK1304-5KS40-4AA0 — Mechanical
ParameterValue
Width110 mm
Depth150 mm
Height230 mm
Mounting methodscrew fixing
3RK1304-5KS40-4AA0 — Specifications
ParameterValue
At 400 V rated value100 000 A
At AC-3 at 400 V rated value900 W
Reverse StartingNo
Type Of The Motor Protectionsolid-state
Trip ClassCLASS 10

Product details

It provides 2 bytes of input and output data over the network, with no digital I/O on the unit itself—signal interfaces are via M12 sockets for the motor connection. The 150 x 110 x 230 mm footprint and screw fixing let it land on a backplate or in a cabinet, and the IP65 rating keeps the electronics clean on the machine frame.

Ratings that drive fit

This motor starter has Trip Class 10 overload protection. Supply voltage range is 20.4 to 28.8 V DC, so a 24 V DC bus with 5% regulation covers it; note the rated value is 24 V DC exactly. Vibration resistance is 2 g, shock resistance 15 g / 11 ms—tough enough for machine-mount near the motor.

Lifecycle status is current—no end-of-life or last-time-buy window. The 3RK1304-5KS40-4AA0 can be specified into new designs and added to existing BOM lines without obsolescence planning.

Frequently asked questions

What are the physical dimensions of the 3RK1304-5KS40-4AA0?

The motor starter is 150 mm deep, 110 mm wide, and 230 mm high. It mounts with screw fixing and can be installed vertically or horizontally.

MPN
3RK1304-5KS40-4AA0