Hammond 182T12 300VA 24V CT Toroidal Chassis Mount Transformer

The 182T12 is a 300 VA low-voltage toroidal power transformer for chassis mounting, from the 182 Series. Its dual secondary delivers 24V C.T. @ 12.5A when the windings are connected in series, or 12V @ 25A when they are connected in parallel, making it a fit for OEM engineers and equipment builders who need a 24V centre-tapped or 12V supply from a single core.

The primary is a dual 117/234 VAC winding for 50/60 Hz operation: wire the two primary halves in parallel for 117 VAC or in series for 234 VAC. The manufacturer's short description for this part reads "REPLACED WITH 1182T12". The toroidal design is described as low profile, lightweight and cool running thanks to its high efficiency, and the units are designed to have all windings engaged. Flexible leads are a minimum of 8" long, and every unit is Hi-Pot tested at 4,000V RMS between primary and secondary.

Physically, the 182T12 measures 5.06 in (129 mm) in outside diameter and 2.27 in (58 mm) high, with a table weight of 5.58 lbs and a listed shipping weight of 7 lbs (3.18 kg). It uses center single-hole mounting through a potted center for extra mounting strength, and ships with one bottom rubber insulating pad and mounting hardware: a 1/4-20 center bolt 2.50 in (64 mm) long (bottom rubber washer only, no top steel washer).

The series is CSA certified to C22.2 #66 (CSA file #209651), UL recognized to UL506 (UL file #E207860) and CE certified to IEC950, and this part is listed as RoHS and REACH compliant. Because toroidal transformers can draw a high magnetizing inrush current when first energized, the manufacturer advises a slow-blow fuse, time-delayed circuit breaker or other soft-start circuitry on the supply line.

Note: the 182 Series will soon be discontinued as a stocked series and is available while quantities last. The manufacturer lists 1182T12 as the replacement for the 182T12, within the 1182 Series.