600 V / 12 A SCR in an isolated full-pack
The STMicroelectronics TYN612MFP is a standard-recovery SCR rated for 600 V off-state blocking and 12 A RMS on-state conduction, housed in a TO-220FPAB full-pack isolated package.
Gate trigger and conduction parametrics
Gate trigger current is 5 mA maximum, with a gate trigger voltage ceiling of 1.3 V. On-state voltage is 1.6 V maximum at rated current. Holding current is 20 mA maximum, and off-state leakage is only 10 µA — the low leakage matters in battery-backed or energy-meter applications where the off-state power budget is tight. The 125 A non-repetitive surge rating (60 Hz half-sine) covers the inrush from a motor start or capacitor bank charging; the SCR survives the surge as long as the junction temperature stays within the SOA.
Industrial temperature range and compliance
The part carries ROHS3 compliance, so it passes the material restrictions for EU and most global markets without an exemption expiry concern. The base product number TYN612 covers a family of voltage and package variants; the MFP suffix identifies the isolated full-pack TO-220. For dual-sourcing, the same die in a standard TO-220 (non-isolated) is available under sibling order codes within the TYN612 family, but the footprint and isolation strategy differ.