Description

The ST303 is an 8VA bell transformer with 230V AC input and 8V or 12V AC output, providing double the power output of the ST301. It is suitable for systems with multiple door bells, larger chime units, or other low-voltage signalling loads requiring up to 1A at 8V or 0.67A at 12V.
DIN rail mounted in 2 modules, the ST303 is installed within a distribution board alongside modular circuit protection devices. The 8VA rating suits standard residential and commercial doorbell systems with extended cable runs or multiple call points.
Part of Hager’s bell and signal transformer range, the ST303 is a popular choice for standard domestic installations and is complemented by the ST305 (16VA) for more demanding applications.