Grothe GT 3139 S ovikellomuuntaja 8/12V 1,3/1A verkkokytkimellä 14049

Doorbell installations often require a safe low voltage supply, but standard power sources can be risky. The Grothe GT 3139 S solves this by converting 230V mains to 8V or 12V AC, with an integrated mains switch for convenient control.

Who is it for

Electricians and DIY installers who need a reliable, switchable transformer for doorbells, chimes, or other low-voltage AC devices in residential or commercial settings.

Main features

• Dual output: 8V AC (1.3A) or 12V AC (1A) selectable via terminal connections.
• Integrated mains switch for easy on/off control without unplugging.
• Safety transformer design with thermal overload and short-circuit protection.
• Compact DIN rail mounting (2 modules, 35mm) for tidy distribution boards.
• Screw terminals for secure wiring.

Specifications

• Input voltage: 230V AC, 50/60Hz
• Output 1: 8V AC, 1.3A
• Output 2: 12V AC, 1A
• Rated power: 15VA
• Mounting: DIN rail, 2 TE (35mm)
• Protection class: IP20
• Overload protection: thermal
• Short-circuit proof: yes
• Operating temperature: -5°C to +40°C
• Housing material: plastic

Tips

Select the appropriate output voltage based on your doorbell's requirements. The integrated switch allows you to disconnect power during maintenance without touching the mains circuit.