Hammond 266J26 26.5VA Transformer, 26.8V C.T. or 13.4V Parallel

The 266J26 is a 26.5 VA chassis-mount power transformer delivering 26.8 V center tapped at 1 A, or 13.4 V at 2 A with its two secondaries in parallel, for builders who need a slightly higher output than a 25.2 V design. 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 (26.8V @ 1A), connected in parallel (13.4V @ 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 266J26 uses mounting style A with 0.19 in (5 mm) mounting holes. Its listed dimensions are A 3.25 in (83 mm), B 2.06 in (52 mm), C 2.00 in (51 mm) and D 2.81 in (71 mm). It weighs 1.3 lbs (0.59 kg) and ships at 1.5 lbs (0.68 kg).