The 3UG3522-1AC40: Snap-on mounting onto a 35 mm DIN rail per EN 50022 — standard for any 22.5 mm-wide relay. The 1-pole main current circuit and non-removable terminals mean the unit is wired in place; if you need to swap it, you pull the screws, not a plug. Reference code K per DIN EN 81346-2 classifies it as a relay/contactor function in the plant documentation scheme.
Siemens 3UG3522-1AC40 SIRIUS Monitoring Relay, 0.1-10A, DC 2
MPN3UG3522-1AC40
Siemens SIRIUS monitoring relay, 3UG3522-1AC40, 22.5 mm, over/undercurrent monitor 0.1–10 A AC/DC, 1 CO contact, DC 24 V, screw connection, 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 |
|---|---|
| Mounting type | snap-on mounting |
| Parameter | Value |
|---|---|
| During operation | -20 ... +50 °C |
| Removable terminal for main circuit | No |
| Reference code acc. to DIN EN 81346-2 | K |
| Number of poles for main current circuit | 1 |
| Removable terminal for auxiliary and control circuit | No |
Product details
Frequently asked questions
What replaces the 3UG3522-1AC40?
The official replacement is the Siemens 3UG4622-1AW30. A secondary option, 3UG4622-1AA30, is noted as usable if wired correctly, but the -1AW30 is the primary successor.
What is the mounting type for this relay?
Snap-on mounting onto a 35 mm DIN rail according to DIN EN 50022. The 22.5 mm width fits standard rail-mounted terminal blocks and relays.
What are the key ratings of the 3UG3522-1AC40?
It monitors over/undercurrent from 0.1 to 10 A AC/DC, has one CO contact, operates on DC 24 V control supply, and uses screw terminals. The operating temperature range is -20 to +50 °C.
MPN
3UG3522-1AC40