Skip to main content
Log in
Siemens 3RT1935-5AK61 — Contactors

Siemens 3RT1935-5AK61 SIRIUS Magnet Coil, 110 VAC 50 Hz / 12

MPN3RT1935-5AK61

Siemens SIRIUS 3RT1935-5AK61 magnet coil, Size S2, screw terminal, 110 V AC at 50 Hz / 120 V AC at 60 Hz, phased-out product.

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

3RT1935-5AK61 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz110 V
3RT1935-5AK61 — Other specifications
ParameterValue
At 60 Hz rated value120 V

Product details

The Siemens SIRIUS 3RT1935-5AK61 is a replacement magnet coil for Size S2 contactors in the SIRIUS family. The coil draws a holding power in the range of 0.8 to 1.1 at 50 Hz, which is the power needed to keep the contactor closed once it has picked up.

The coil mounts onto a Size S2 SIRIUS contactor frame via screw terminals. The control voltage is AC only — 110 V at 50 Hz or 120 V at 60 Hz — so verify your control transformer taps before installing. The coil's holding power (0.8 to 1.1 at 50 Hz) is low enough that the control transformer can typically share a circuit with the PLC output driving it, but check the inrush at pickup if the transformer is lightly sized.

Frequently asked questions

What replaces the 3RT1935-5AK61?

The official successor is the SIRIUS 3RT2 series. The exact order code depends on the contactor frame size and voltage; the 3RT2 family covers the same Size S2 footprint with updated coil technology.

What are the key ratings for this coil?

Control voltage is 110 V AC at 50 Hz / 120 V AC at 60 Hz. Holding power at 50 Hz is in the range of 0.8 to 1.1. It is designed for Size S2 SIRIUS contactors with screw terminals.

Will the 3RT1935-5AK61 fit a panel designed for the 3RT7036-1AG20?

The 3RT1935-5AK61 is a coil for a Size S2 contactor, while the 3RT7036-1AG20 is a complete Size S2 contactor. The coil itself is the same frame size, so it will physically mount on the contactor base. However, the 3RT7036-1AG20 has a different coil (110 V at 50 Hz / 110 V at 60 Hz, 0.36 holding power), so the 3RT1935-5AK61 is not a direct electrical replacement without verifying the control voltage match.

MPN
3RT1935-5AK61