28VAC plug/socket?

[pwnell]

The 2.5mm DC plug is ubiquitous.  AFAIK they can be  rated for 24V DC and up to about 8A.

What connector can I use - panel mount type - for 24V AC?  I want to connect a 115 - 24V AC transformer's secondary to a small project box, but need a connector that can be panel mounted and will accept 24V AC and at most 100mA.

I tried searching but can only find line voltage AC plugs.

[calzap]

Are you looking for a plug or socket or both?  If you go to the Digikey or Mouser website, you’ll find a huge number of styles that can handle 24 VAC and 0.1 A.  Not sure what you mean by ubiquitous 2.5 mm connector.  2.5 mm JST? … not exactly ubiquitous.  2.1 x 5.5 mm connectors are ubiquitous though.  Unless it’s critical or going commercial, I wouldn’t be too concerned about 24 VAC at 0.1 A into connector rated 24 VDC at 8 A.  Most connectors have an AC as well as DC rating … just have to find it.  Line voltage plugs can easily handle 24 VAC, but for safety reasons, do not use standard line voltage plugs for low voltage connections.

Mike

[pwnell]

Thanks - I did try to search on digikey and mouser and newark but I get like 1 or 2 socket/plug pairs when I filter on low voltage AC - and they cost $500 or something  crazy.

https://www.mouser.ca/c/connectors/power-connectors/ac-power-plugs-receptacles/?mounting%20style=Panel~~Panel%20Mount&voltage%20rating=30%20VAC%2C%20125%20VAC%2C%20250%20VAC%2C%2032%20VDC%2C%2042.4%20VDC~~48%20VAC%2FDC&rp=connectors%2Fpower-connectors%2Fac-power-plugs-receptacles%7C~Voltage%20Rating%7C~Mounting%20Style

Not sure what I am doing wrong.

[calzap]

Not sure either what you are doing wrong.  Likely going too low on voltage.  If a connector can handle 120 or 240 V, it can handle a lower voltage.  If you limit search to low voltage only, the selection will be limited.  Also search for plugs and sockets separately, not for pairs.

Mike

[mariush]

Most barrel jacks will be fine with 24v ... lots of laptop adapters use barrel jacks and output 20v DC ... 24v AC is not a big difference.

Also Digikey has a bunch of barrel jacks rated for 48v AC/DC , here's a link : https://www.digikey.com/short/5pj74hzd

You may want to use a 3 pin keyed connector or maybe a PowerDIN connector , just in case you'll get a transformer with center tap as that would make it easier to get positive and negative voltages.

example : https://www.digikey.com/short/p57j30t3

You could even go to more basics like plain RJ45 connectors ... they do power over ethernet up to 56v so they'll handle 24v AC easily ... Just use a couple pairs for the ac- and ac+

[pwnell]

Thanks!