Hammond 266J48 48VA Transformer, 48V C.T. or 24V Parallel, Style V

The 266J48 is a 48 VA open-style power transformer rated 48 V center tapped at 1 A, or 24 V at 2 A with the secondaries in parallel, built in mounting style V for chassis installation. It belongs to the Hammond 266 Series of low voltage/filament transformers and is aimed at OEM engineers, repair technicians and panel builders who mount the transformer directly to a chassis.

The primary is a dual 117/234 VAC, 50/60 Hz winding: connect the two primary halves in parallel for 117 V or in series for 234 V. The dual secondaries can be used as a center-tapped secondary (48V @ 1A), connected in parallel (24V @ 2A) or used individually, and the unit is designed for use with all windings engaged.

Construction is open style with a dual bobbin design, so no electrostatic shield is required. Hammond uses Class B (130 °C) insulation for extra protection, while the design is UL listed as Class A (105 °C). Every unit is hi-pot tested at 2,000V RMS, and all leads are a minimum of 6 in long. The transformer is UL listed (# E207860) Type 3AH, CSA certified (209651), and RoHS and REACH compliant.

The 266J48 uses mounting style V with 0.19 in (5 mm) mounting holes. Its listed dimensions are A 3.56 in (90 mm), B 2.20 in (56 mm), C 3.12 in (79 mm) and D 3.13 in (80 mm). It weighs 2.5 lbs and ships at 2.5 lbs (1.13 kg).