BL-331602-03 is a Jewell Modutec series electronic controller manufactured by Jewell Instruments, LLC. It is a three-phase controller with a voltage rating of 240VAC and an operating temperature range of -40°F (-40°C) to 176°F (80°C). This controller is designed for use with Omron and other major brand DC static relays and features opto-isolated inputs, adjustable trip and reset points, adjustable run time parameters, and a signal output. This controller also includes a 5-way screw terminal block for ease of wiring.