This part is an IELK1-1RS4-35390-10-V reset module manufactured by Sensata. It is rated for a self-holding voltage of 10VDC and a forced hold voltage of 12VDC. It is a 1 form C, single pole, normally open/locked relay that is designed for a wide range of applications such as industrial electronics, telecommunications, security and access control, HVAC systems, home automation, and more. It features an integrated diode for surge protection, a low profile design, and is UL, CUR, and MET approved.