Bell transformer, 12 V AC 1.3 A, Busch-Welcome (2-wire system), system devices, bell transformer, 12 V AC 1.3 A Power supply for an electric door opener. 4 V~, 1.3 A, 8 VA 8 V~, 1.3 A, 12 VA 12 V~, 1.3 A, 16 VA Nominal frequency: 50 Hz Protection class device: IP 20 Dimensions (H x W x D): 90 mm x 36 mm x 65 mm Division unit: 2