Hammond 166L50 50V CT 2A Power Transformer, 100 VA

The 166L50 is a low voltage/filament power transformer from the 166 Series of economical single-primary, open style chassis mount transformers. It takes a 115V 60 Hz. primary and delivers a 50 V center-tapped (C.T.) secondary rated 2 A RMS, for a power rating of 100 VA. It suits OEM engineers, equipment builders and technicians who need a compact line-to-low-voltage transformer that bolts directly to a chassis. Its 50 V C.T. secondary at 2 A gives 100 VA in a 4.50 in long body, and its drawing lists a 0.203 in (5.2 mm) mounting hole.

Construction is open style with a channel bracket and two-hole chassis mounting. A dual bobbin design means no electrostatic shield is required, and the series uses Class B insulation (130 °C) for extra protection, while the design is UL listed as Class A (105 °C). Leads are a minimum of 6 in long. The drawing schematic shows black primary leads and green secondary leads, with a green/yellow center-tap lead.

Overall dimensions from the series table are A 4.50 in (114 mm), B 2.50 in (64 mm) and C 3.00 in (76 mm), with a D (hole-to-hole mounting) dimension of 4.00 in (102 mm); the mounting dimension column lists 0.20 in (5 mm) (mounting ref. C). The part drawing gives A 4.5 in / 114.3 mm, B 2.5 in / 63.5 mm, C 3 in / 76.2 mm, D 4 in / 101.6 mm and a width-wise mounting hole size of 0.203 in / 5.2 mm. Shipping weight is 3.5 lbs (1.59 kg).

The 166 Series is hi-pot tested at 2,000V RMS, UL listed and CSA certified, and this part is listed as RoHS and REACH compliant. For 117/234 V or 50/60 Hz operation or dual secondaries, the series literature points to the 266 Series instead.