Toroidal Transformer max 5 A/60VA Transformer 230 V to 1x 12 V AC Ring : Amazon.de: DIY & Tools
Amazon.com: 60VA-102/12V Solid State Transformer : Tools & Home Improvement
24VAC 40VA Plug in Transformer,Doorbell Transformer Compatible with All of Doorbell,Nest, Ecobee, Sensi and Honeywell Thermostat - - Amazon.com
24V 830mA Thermostat and Doorbell Transformer, Wall Transformer with PTC Fuse Compatible with Nest, Honeywell, Ecobee and Sensi Thermostat, Nest Hello and All of Doorbells - - Amazon.com
Dayton Class 2 Transformer, 60Va, 24Vac, Foot: Electronic Power Transformers: Amazon.com: Industrial & Scientific