VEMER VN319000 model TMC 30/24 DIN-rail mounting safety transformer for continuous service 230V/12-24V. Color Grey

Bought this Vemer transformer to wire up a Reolink Doorbell Camera, and so far it’s been working perfectly. Wiring was pretty straightforward. I used it with a UK 240V mains supply: 230/240V supply: Terminal 1 – Live (L) Terminal 6 – Neutral (N) 24V AC output to the doorbell: Terminal 7 – Doorbell wire Terminal 12 – Doorbell wire I also used a Wylex WBE3 All Purpose DIN enclosure (Toolstation AE405) to house the transformer, which worked well. Overall, a good quality transformer and exactly what I needed for the installation.

Transformer blew up. Worked for a while after it was professionally installed then one day - no charging. Discovered the device to be swollen and not working. Could have caught fire so we were lucky.

I recently purchased the VEMER VN319000 TMC 30/24 Continuous Operation Transformer for a project requiring a stable 12-24V power supply, and it has not disappointed. The 230V to 12-24V output range is perfect for powering my system, providing just the right amount of power at 30 VA. One of the standout features of this transformer is its continuous operation. It has been running non-stop since I installed it and has proven to be reliable, with no issues with overheating or performance dips. The white color blends in seamlessly with my setup, and the compact design doesn’t take up too much space. Setting it up was straightforward, with clear instructions included. The transformer feels solid and well-built, providing peace of mind knowing that it will perform efficiently over time. It’s also quiet, which is a big plus when used in a workspace or home environment where noise could be a concern. Overall, I’m very satisfied with the VEMER VN319000 Transformer. It’s reliable, efficient, and durable—perfect for any application requiring a stable power source. If you're in need of a dependable transformer for continuous operation, I’d definitely recommend this one.

Purchased in December 2023. Used for Google Doorbell with a separate Honeywell door chimer. Worked perfect for a few years and has now died April 2026. Both outputs provide zero volts. Not sure what failed in the unit but I had hoped it would last longer.

The Unifi Protect G4 Doorbell is by far and away the best consumer video doorbell on the market, and with no ongoing subscription costs, beats the heck out of Ring, Nest & Eufy offerings. Unifi Protect depends upon local video storage - I much prefer this model over the 'someone else's computer' cloud-approach. As of right now though it's targeted at the US market and for US doorbell chime voltages (16 to 24v AC) so requires a bit of thought to work in the UK. Not wanting to miss out here in the UK, and having just moved into a new house which happily had a mains supply near the door from a 30 year old faulty alarm system, I was able to chase in a cable and fused spur switch and fit a 5/6-way DIN enclosure and a Honeywell D117 electromechanical chime box. There are limited 240v mains transformer options available that would fit this setup but the Vemer 30/24 can supply both 24v AC and 12v AC, so along with an AC relay, I was able to supply the Unifi Protect G4 doorbell with 24v AC and the chime box with 12v AC. Everything works a treat, no sign of the 'instant smoke' referred to by other reviewers; one has to suspect user error in those cases though manufacturing faults could also explain it I suppose... though surely they are tested before leaving the factory? Mine seems perfect however and has been happily supplying my video doorbell for a week or more with no problems. A bit pricey but recommended and it should last for years.

it's dead after less than 2 yrs.....

Easy to fit and does the job I wanted it for

This transformer is designed for 230V input. Because the UK never actually harmonised on 230V and stayed on 240V this means that the transformer output voltage will be higher than 24V as the transformer is being supplied with a voltage that is a bit higher than it was designed for. Worse still, the mains voltage in UK homes frequently rises to 250V or over, particularly at night. This will further raise the output voltage of the transformer above its rated output. With an input voltage of 251V tonight the transformer was outputting 32V while loaded with a video doorbell. This is significantly higher (25%) than the maximum voltage specified for many video doorbells. Normally these tolerances do not result in equipment failures but in this case the doorbell is rated at 24V which its maximum operating voltage. While other reviews state that these transformers are perfect, they clearly are far from optimal. Many doorbells will “work” but they risk having a reduced lifespan due to the continuous over voltage. Time will tell. Not recommended.

perfetto per la mia centralina d'irrigazione.

Pour mes commandes 24VAC 30VA bien

Voldoet aan mijn verwachting!

Fungerar perfekt.

Voldeed aan de verwachtingen en goed om men videodeurbel van stroom te voorzien.