Hammond 182L240 500VA 240V Single-Secondary Toroidal Transformer

The 182L240 is a 500 VA low-voltage toroidal power transformer from the 182 Series, built for chassis mounting in equipment where a low-profile, lightweight and cool-running transformer is needed. It suits OEM engineers, electronics designers and maintenance teams who need a dual 117/234 VAC primary for 50/60 Hz operation feeding a single 240V secondary rated 2.08 A.

This is a single-secondary model: the manufacturer's connection information shows a dedicated secondary wiring arrangement for single-secondary units. The primary is wired in parallel for 117 VAC or in series for 234 VAC, and the units are designed to have all windings engaged. Leads are flexible and a minimum of 8 in long.

The toroid measures 5.50 in (140 mm) in outside diameter and 2.21 in (56 mm) high, with a listed weight of 8.46 lb and a shipping weight of 8.5 lbs (3.86 kg). It has a potted center for extra mounting strength and mounts through a single center hole using the included 1/4-20 hardware, 2.50 in (64 mm) long, supplied with one bottom rubber insulating pad and mounting hardware.

Each unit is Hi-Pot tested at 4,000 V RMS between primary and secondary. The series is CSA certified to C22.2 #66 (CSA file #209651), UL recognized to UL 506 (UL file #E207860) and CE certified to IEC 950, 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 recommends a slow-blow fuse, time-delayed circuit breaker or soft-start circuitry on the supply line.

Availability note: the 182 Series is being discontinued as a stocked series and is available while quantities last; it has been replaced by the 1182 Series.