Single-channel high-side switch — 12 mOhm Rds(on) for high-current loads
The STMicroelectronics VN5012SAK-E is a VIPower™ series single-channel high-side N-channel power switch rated for continuous output current up to 45 A with a maximum on-resistance of 12 mOhm. The switch integrates fixed current limiting, over-temperature protection, and over-voltage clamping, plus an auto-restart feature that cycles the output after a fault clears.
Thermal and package — PowerSSO-24 rework notes
When reworking, the large pad soaks heat.
This means STMicroelectronics no longer manufactures it, and the only available stock is new-old-stock or surplus inventory held by independent distributors. No pin-compatible second source is documented in the available records.
Fault protection and interface — simple On/Off control
The switch uses a non-inverting On/Off interface with a 1:1 input-to-output ratio. Fault protection includes fixed current limiting, over-temperature shutdown, and over-voltage clamping — all self-contained, no external sense resistors needed. The auto-restart feature re-enables the output after a thermal fault cools down, which suits loads that tolerate brief interruptions like lamps or DC motors.