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Siemens 3RK1304-5KS40-4AA3 — Remote I/O & Fieldbus Modules

Siemens 3RK1304-5KS40-4AA3 SIMATIC Motor Starter, IP65

MPN3RK1304-5KS40-4AA3

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Siemens SIMATIC motor starter, 3RK1304-5KS40-4AA3, direct starter, CLASS 10, IP65, 150 x 110 x 230 mm, PROFINET and PROFIBUS DP.

$240.58Ref. price · indicative, final on quote

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Siemens 3RK1304-5KS40-4AA3 datasheet (PDF)

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

Specifications

3RK1304-5KS40-4AA3 — Identification
Parameter	Value
Product designation	Motor starters
Product design	direct starter

3RK1304-5KS40-4AA3 — Communication
Parameter	Value
PROFIBUS DP support	Yes
PROFINET support	Yes
AS-Interface support	No
Bus communication	Yes

3RK1304-5KS40-4AA3 — I/O
Parameter	Value
Digital inputs	0
Digital input signals	0
Digital output signals	0
Digital inputs parameterizable	No
Digital outputs parameterizable	No

3RK1304-5KS40-4AA3 — Electrical
Parameter	Value
Rated value (DC)	20.4 ... 28.8 V
Control supply voltage type	DC
Rated surge voltage	6 kV
Voltage type	AC
Adjustable Current Response Value Current Of The Current-Dependent Overload Release	0.15 ... 2 A
Operating Voltage Rated Value	200 ... 400 V
Number Of Poles For Main Current Circuit	3

3RK1304-5KS40-4AA3 — Environmental
Parameter	Value
Ingress protection (IP)	IP65
Operating temperature range	-25 ... +55 °C
Storage temperature range	-40 ... +70 °C
Shock resistance	15g / 11 ms
Pollution degree	3

3RK1304-5KS40-4AA3 — Mechanical
Parameter	Value
Width	110 mm
Depth	150 mm
Height	230 mm
Mounting method	screw fixing

3RK1304-5KS40-4AA3 — Specifications
Parameter	Value
At 400 V rated value	100 000 A
At AC-3 at 400 V rated value	900 W
Reverse Starting	No
Type Of The Motor Protection	solid-state
Trip Class	CLASS 10

Product details

SIMATIC direct starter with fieldbus

The 3RK1304-5KS40-4AA3: It communicates over both PROFINET and PROFIBUS DP, so it fits into Siemens S7-based control architectures without a separate gateway (cite:,).

Physical fit and mounting

Dimensions are 150 mm deep, 110 mm wide, and 230 mm high — a compact footprint for a motor starter with integrated fieldbus and bypass (cite:,). Fastening is by screw fixing; the mounting position is vertical or horizontal, giving flexibility in panel layout or machine-side mounting (cite:,).