220V 240V Relay, Briidea On/Off Switch Electric Heating Relay with Built-in 24V Transformer, Replacement for Any Relay, Compatible with 24V Thermostat - - Amazon.com
Top Hat Rail Transformer 18 VA 24 V : Amazon.de: DIY & Tools
Transformer for TM30/24 Bell Push Button 12-24V : Amazon.de: DIY & Tools
12V AC Power Supply/Transformer AC/AC Waterproof IP67 for Outdoor Use Input 230V 1.9 m Cable for Garden Spotlight : Amazon.de: DIY & Tools
Doorbell Transformer, AC 24V 500mA Power Supply for Doorbell, C Wire Thermostat Power Adapter, 315" Long Cable Power Supply - - Amazon.com
Print Transformer 50 VA 230 V/24 V/2,08 a : Amazon.de: DIY & Tools
Amazon.co.jp: TOYOZUMI TRANS HT-2402 : Industrial & Scientific
Transformer 100VA 50/60Hz Screw Connector Primary Secondary 230 V 24 V : Amazon.de: Business, Industry & Science