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Siemens 3RK1304-5LS70-2AA3 — Remote I/O & Fieldbus Modules

Siemens 3RK1304-5LS70-2AA3 SIMATIC Motor Starter, 12 A, IP65

MPN3RK1304-5LS70-2AA3
Active

Siemens SIMATIC motor starter, direct starter design, 12 A at 400 V AC, adjustable trip class 5/10/20/30, IP65, PROFINET, 100 kA SCCR.

Siemens 3RK1304-5LS70-2AA3 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RK1304-5LS70-2AA3 — Identification
ParameterValue
Product designationMotor starters
Product designdirect starter
3RK1304-5LS70-2AA3 — Communication
ParameterValue
PROFIBUS DP supportYes
PROFINET supportYes
AS-Interface supportNo
Bus communicationYes
3RK1304-5LS70-2AA3 — I/O
ParameterValue
Digital inputs4
Digital input signals4
Digital output signals0
Digital inputs parameterizableYes
Digital outputs parameterizableNo
3RK1304-5LS70-2AA3 — 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 Release1.5 ... 12 A
Operating Voltage Rated Value200 ... 400 V
Number Of Poles For Main Current Circuit3
3RK1304-5LS70-2AA3 — Environmental
ParameterValue
Ingress protection (IP)IP65
Operating temperature range-25 ... +55 °C
Storage temperature range-40 ... +70 °C
Shock resistance15g / 11 ms
Pollution degree3
3RK1304-5LS70-2AA3 — Mechanical
ParameterValue
Width110 mm
Depth160 mm
Height230 mm
Mounting methodscrew fixing
3RK1304-5LS70-2AA3 — Specifications
ParameterValue
At 400 V rated value100 000 A
At AC-3 at 400 V rated value12 A
Reverse StartingNo
Type Of The Motor Protectionfull motor protection
Trip ClassCLASS 5, 10, 20 and 30 adjustable

Product details

What this motor starter delivers

Its adjustable trip class — selectable between CLASS 5, 10, 20, and 30 — lets you match the thermal overload curve to the motor's starting profile: fast tripping for short acceleration times, slower for high-inertia loads like fans or centrifuges. It runs on a 24 V DC control supply (20.4 to 28.8 V range) and supports both PROFINET and PROFIBUS DP protocols, so it drops into a Siemens automation network without a separate gateway.

Mounting is by screw fixing, and the unit can be installed vertically or horizontally. The main energy infeed uses a socket per ISO 23570, which simplifies pre-wired harness integration. It provides 4 digital inputs via M12 sockets and 2 bytes of input/output data to the controller — enough for feedback and basic interlocks without a separate I/O block.

Frequently asked questions

What are the key ratings for this motor starter?

Rated 12 A at 400 V AC for motor starting, with an adjustable trip class of 5, 10, 20, or 30. The unit has a 100 kA SCCR at 400 V and operates on a 24 V DC control supply (20.4–28.8 V).

What communication protocols does it support?

It supports both PROFINET and PROFIBUS DP, allowing direct connection to Siemens automation networks without additional interface modules.

What is the enclosure protection rating?

IP65, meaning it is dust-tight and protected against water jets — suitable for mounting in washdown or dusty environments.

MPN
3RK1304-5LS70-2AA3