MG MGT1650P
3 screw terminal output
MG Electronics MGT1650P 16.5VAC 50VA Class II Plug-In Transformer
Plug-in Class II power supply with 120VAC input and 16.5VAC 50VA output, auto-reset PTC fuse, LED power indicator and 3-screw terminal block—ideal for alarm, access and CCTV loads. (alarmax.com)