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Siemens 3RK1325-6KS71-1AA5 — Remote I/O & Fieldbus Modules

Siemens 3RK1325-6KS71-1AA5 SIRIUS Reversing Starter, 0.75 kW

MPN3RK1325-6KS71-1AA5
NRND

Siemens SIRIUS reversing motor starter, 3RK1325-6KS71-1AA5, 0.75 kW at 400 V, IP65, AS-Interface, trip classes 5/10/15/20.

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

Specifications

3RK1325-6KS71-1AA5 — Identification
ParameterValue
Product designationMotor starters
Product designreversing starter
3RK1325-6KS71-1AA5 — Communication
ParameterValue
PROFIBUS DP supportNo
PROFINET supportNo
AS-Interface supportYes
AS-Interface supportYes
Bus communicationYes
3RK1325-6KS71-1AA5 — I/O
ParameterValue
Digital inputs4
Digital input signals4
Digital output signals1
Digital inputs parameterizableYes
Digital outputs parameterizableYes
3RK1325-6KS71-1AA5 — Electrical
ParameterValue
Rated value (DC)20.4 ... 28.8 V
Control supply voltage typeDC
Rated surge voltage6 000 V
Adjustable Current Response Value Current Of The Current-Dependent Overload Release0.15 ... 2 A
Operating Voltage Rated Value200 ... 440 V
Number Of Poles For Main Current Circuit3
3RK1325-6KS71-1AA5 — Environmental
ParameterValue
Ingress protection (IP)IP65
Operating temperature range-25 ... +55 °C
Storage temperature range-40 ... +70 °C
Shock resistance12g / 11 ms
Pollution degree3
3RK1325-6KS71-1AA5 — Mechanical
ParameterValue
Width294 mm
Depth159 mm
Height215 mm
Mounting methodscrew fixing
3RK1325-6KS71-1AA5 — Specifications
ParameterValue
At 400 V rated value0.75 kW
At AC-3 at 400 V rated value2 A
Reverse StartingYes
Type Of The Motor Protectionfull motor protection
Trip ClassCLASS 5, 10, 15, 20

Product details

It's rated for 0.75 kW at 400 V, and you can set the trip class to 5, 10, 15, or 20 via the onboard selector, which means you match the overload protection to your motor's startup profile: faster trip for high-inertia loads, slower for standard starts. The enclosure is IP65, so it's built for washdown environments or outdoor installation — no separate cabinet needed if the location is within the -25 to +55 °C operating range. Communication is over AS-Interface (the M12 addressing plug is standard), and the main power connects via a HAN Q4/2 plug per ISO 23570.

The 0.75 kW at 400 V rating is the AC-3 motor-switching capability — that's the number that governs whether it handles your load. The IP65 rating means the entire starter, including the electronics and the HAN Q4/2 connector, survives hose-down cleaning, so it's suited for food-and-bev lines or outdoor conveyor sections without a separate panel. Trip class flexibility (5/10/15/20) is the practical differentiator here: you dial in the overload curve to match the motor's starting duration without nuisance tripping. A 0.75 kW pump on a direct start might use Class 10; a crusher with a long acceleration could need Class 20. The 24 V DC control supply is standard for modern PLC-driven panels.

Mounting is by screw fixing, and the unit can be installed vertically, horizontally, or flat — so it adapts to whatever orientation the enclosure or machine frame allows. The dimensions are 294 mm wide by 215 mm high by 159 mm deep, which is a compact footprint for a reversing starter with integrated overload and AS-i interface. The HAN Q4/2 power connector and M12 AS-i addressing plug mean field wiring is plug-and-play, not a terminal-by-terminal exercise.

Frequently asked questions

What is the closest functional alternative if this part is unavailable?

There is no direct plug-and-play functional second-source that drops into the same panel without rewiring. The HAN Q4/2 connector and AS-Interface addressing are specific to this SIRIUS design. Any replacement would require re-terminating the power and communication connections.

What are the key physical dimensions for panel layout?

The unit measures 294 mm wide, 215 mm high, and 159 mm deep. It mounts via screw fixing and can be oriented vertically, horizontally, or flat.

What trip classes are available on this starter?

The overload relay can be set to Class 5, 10, 15, or 20, giving flexibility to match the motor's starting characteristics.

What compliance documentation is available for this part?

As a Siemens SIRIUS product, it carries CE marking and is designed to meet relevant IEC/EN standards for motor starters. Specific RoHS/REACH declarations are part of the standard Siemens documentation package available on request.

MPN
3RK1325-6KS71-1AA5