The 3UG3532-1AL20: The 15-600 V AC/DC measurement range is unusually wide — it covers everything from 24 V control circuits up to 480/600 V line monitoring on a single device, so you don't need separate voltage-sensing variants for different panel sections. The single-pole (1-pole) main current circuit and one changeover contact (1 CO) mean this relay monitors one voltage and signals one alarm or trip condition; it is not a multi-channel monitor. The 22.5 mm housing width is the standard narrow form factor that stacks efficiently on a DIN rail — six units fit in the space of one 45 mm contactor.
Siemens 3UG3532-1AL20 SIRIUS Monitoring Relay, 15-600 V AC/D
MPN3UG3532-1AL20
Siemens SIRIUS 3UG3532-1AL20 monitoring relay, 22.5 mm, measuring voltage 15-600 V AC/DC, 1 changeover contact, 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 replaces the 3UG3532-1AL20?
The manufacturer-specified replacement is the 3UG4632-1AW30. It maintains the same 22.5 mm width, screw terminals, and SIRIUS series, with a similar voltage monitoring range.
What is the mounting type for this relay?
Snap-on mounting onto a 35 mm standard mounting rail per DIN EN 50022.
MPN
3UG3532-1AL20