The Siemens 3UG3531-1AC40 is a SIRIUS monitoring relay in a 22.5 mm housing that measures a voltage from 0.2 to 60 V AC/DC and switches a single changeover contact (1 CO) based on an adjustable threshold and hysteresis. The control supply is 24 V DC, and connections are via screw terminals.
Siemens 3UG3531-1AC40 SIRIUS Monitoring Relay, 0.2-60 V AC/D
MPN3UG3531-1AC40
Siemens SIRIUS monitoring relay 3UG3531-1AC40, 22.5 mm, measuring voltage 0.2-60 V AC/DC, threshold value + hysteresis, 1 CO contact, 24 V DC coil, screw terminal, IP20, snap-on mounting.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Product line / brand name | SIRIUS |
| Parameter | Value |
|---|---|
| Ingress protection (IP rating), wired | IP20 |
| Parameter | Value |
|---|---|
| Mounting type | snap-on mounting |
| Parameter | Value |
|---|---|
| During operation | -20 ... +50 °C |
| Reference code acc. to DIN EN 81346-2 | K |
| Number of poles for main current circuit | 1 |
Product details
Frequently asked questions
What is the mounting type for 3UG3531-1AC40?
Snap-on mounting onto a 35 mm DIN rail according to DIN EN 50022.
What is the operating temperature range?
-20 to +50 °C during operation.
What is the IP rating?
IP20 at the front.
MPN
3UG3531-1AC40