Manufacturer: Littelfuse / Teccor Brand Thyr  •  RoHS/pb-free: RoHS   Pb-free  •  Voltage - Off State: 400V  •  Voltage - Gate Trigger (Vgt) (Max): 800mV  •  Current - On State (It (AV)) (Max): 510mA  •  Current - On State (It (RMS) (Max): 800mA  •  Current - Gate Trigger (Igt) (Max): 200µA  •  Current - Hold (Ih) (Max): 5mA  •  Current - Non Rep. Surge 50, 60Hz (Itsm): 8A, 10A  •  SCR Type: Sensitive Gate  •  Mounting Type: Through Hole  •  Package / Case: TO-92-3 (Standard Body), TO-226  •  Other PartNo: S4X8ESRP-ND, S4X8ESRPTR