SCR (Semi-controlled Silicon Rectifier)
Control method
The circuit is triggered by a pulse current, maintained by the main current, and automatically turns off when the current crosses zero. (Common application)
AC phase control: dimming lights, fan speed controllers, AC solid-state relays, simple AC power regulation (typical applications include AC brushed motors, temperature control, etc.).
Product Appearance
Surface mount packaging:SOT-23、SOT-89、SO-T223-2L/3L、TO-252、T0-263
External program packaging:TO-92、TO-251、TO-126、TO-202B、TO-220系列、TO-3P、TO-247、TO-247S、ITO247
insulation:In the plug-in package, both 220A and 220F are insulated.
Chip attribute classification：Unidirectional controlled silicon, bidirectional controlled silicon
Chip process：Single-mesa process (low voltage, good packaging reliability), dual-mesa process (high voltage, poor packaging reliability).
Wire bonding process：Aluminum wire bonding and copper strip sintering processes
Application areas
bidirectional：
Temperature control (PTC type load)：Small household appliances such as ion perm, water heater, smart toilet, hair dryer, electric kettle, electric iron, electric folding iron, electric oven, and electric frying pan.
Speed regulation (motor load)：Electric fans, blenders, vacuum cleaners (AC), washing machines, power tools, etc.
dimming：LED driver
unidirectional:
Power failure protection (reverse protection)：Leak Treasure , Charger, Micro Photovoltaic Inverter
UPS：UPS bypass application
Power quality：Controlled rectification