BT137-600D,127 is an SCR from NXP (formerly Phillips/NXP Semiconductors) designed for use in mains ac switching applications such as light dimmer switches and heater control. The BT137-600D,127 is a 1600V, 6A SCR that is UL Recognized and CSA Certified. It features a 0.8V holding current, a high sensitive trigger gate, and very fast dynamic performance. It also has a low on-state voltage of 0.8V and a high surge current rating of 16A. The SCR is available in a TO-220AB package and is RoHS compliant.