Hammond 162E120 2.4VA 120V Center-Tapped PCB Transformer, 115/230V

The 162E120 is a low-profile, PC board mount power transformer from the 162-164 Series, rated at 2.4 VA with a universal dual primary for 115V or 230V operation at 50/60 Hz. It is intended for designers and OEM engineers who need a low-voltage AC source mounted directly on a printed circuit board. The 120V center-tapped series connection delivers .02A, and wiring the two secondaries in parallel gives 60V at .04A.

Construction uses a low profile, split bobbin design with dual winding secondaries that are non-concentrically wound. Primary to secondary coupling is low, so no electrostatic shield is required. Insulation is Class B (130 degrees C) and the unit is hipot rated at 2,500V RMS; the drawing lists a primary-to-secondary hipot test of 2500V, 60Hz for 1 second. Pin numbers are embossed on the bobbin flange. The units are designed so that all windings must be used.

Per the part drawing, the 162E120 measures 1.375" long, 1.125" wide and 1.170" high (inches, ±0.030"), with a series table nominal size of 1.38 x 1.13 x 1.19 in. The series table lists a weight of 0.25 lbs, and the listed shipping weight is 0.25 lbs (0.11 kg). At the 2.4 VA size no mounting hardware is required: the transformer is held by its PC board pins, which use industry standard pin spacing.

Electrically, the drawing shows two 115V primary windings (pins 1-2 and 3-4) and two 60V secondary windings (pins 5-6 and 7-8) marked 20mA each. Test criteria include a maximum excitation current of 26.4mA at 115V, 60Hz, and a secondary no-load voltage of 73.21V ±2% per winding. The part is cULus recognized and is listed as RoHS and REACH compliant. A single-primary 115V version of the same rating is available as the 164E120.