Hammond 266JA12 12VA Transformer, 12V C.T. or 6V Parallel, Style V

The 266JA12 is a compact 12 VA power transformer with mounting style V, rated 12 V center tapped at 1 A or 6 V at 2 A in parallel, for small chassis-mounted low-voltage circuits fed from 117 V or 234 V. 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 (12V @ 1A), connected in parallel (6V @ 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 266JA12 uses mounting style V with 0.19 in (5 mm) mounting holes. Its listed dimensions are A 2.88 in (73 mm), B 1.73 in (44 mm), C 2.37 in (60 mm) and D 2.38 in (60 mm). It weighs 1 lbs (0.45 kg) and ships at 1 lbs (0.45 kg).