The STMicroelectronics TN2010H-6FP is a sensitive-gate SCR (silicon-controlled rectifier) in a TO-220FPAB full-pack isolated package, rated for 600 V off-state voltage and 20 A RMS on-state current (12.7 A average). The sensitive gate with a maximum trigger current of 10 mA and trigger voltage of 1.3 V lets low-power logic or a microcontroller drive it directly — no separate driver transistor needed, which simplifies the gate-drive circuit and reduces BOM count.
The low trigger threshold eliminates the need for a discrete driver transistor or optocoupler in many designs — a cost and board-area win for high-volume equipment like appliance controls or industrial fan drives. The 1.6 V maximum on-state voltage at rated current means conduction losses stay predictable, helping thermal design in the TO-220FPAB package.
Surge capability and holding current
Non-repetitive surge current is rated at 197 A at 50 Hz and 180 A at 60 Hz, giving headroom for inrush from capacitive loads or short-duration fault events. The maximum holding current of 40 mA means the SCR stays latched once triggered unless the load current drops below that threshold — a typical value for medium-current SCRs that prevents nuisance turn-off in motor or heater circuits. Off-state leakage is specified at a maximum of 5 µA, which is negligible for most AC-line applications.