Obsolete — what that means for sourcing
The STD7NS20T4 carries an Obsolete lifecycle status from STMicroelectronics. Sourcing is limited to the independent distribution market — new-old-stock, surplus, or verified pulled inventory.
200 V, 7 A N-channel — the headline ratings
This is a single N-channel MOSFET from the MESH OVERLAY™ series, built for medium-voltage switching applications. These numbers are modest — the driver sees a light capacitive load, so switching losses stay manageable even with a simple gate resistor.
Housed in the TO-252-3 (DPAK) surface-mount package, the STD7NS20T4 has two leads plus a drain tab. The 150°C maximum junction temperature is the absolute ceiling — the datasheet's thermal derating curve should be followed for continuous operation above 25°C case temperature.
