The OSB3SA3131A is a part from Optosupply's line of devices that are designed to protect sensitive electronic components from over-voltage, over-current and short circuit conditions. This device uses a multi-stage crowbar protection circuit to help protect against damaging overvoltages. It is available as a single, dual, or triple channel variant, and includes internal protection bypass diodes and temperature protection. It is UL recognized, IP67 rated, and RoHS compliant, making it ideal for a variety of applications and markets.