What this automotive-grade power switch delivers
The RJF0613JSP-00#J0 is a single-channel N-channel power switch from the Automotive AEC-Q101 series, designed for general-purpose on/off switching of loads up to 5 A continuous within a 3.5 V to 12 V load supply range. Its 58 mOhm typical Rds(on) keeps conduction losses low enough that the 8-SOIC package can handle 5 A without excessive board copper for heat spreading, though the 150°C operating temperature ceiling means the junction must stay below that limit under worst-case ambient and load. The non-inverting input with a simple on/off interface means a logic-level GPIO from an MCU or ECU can drive it directly — no Vcc supply needed for the switch itself.
Built-in protection for harsh environments
Fault protection includes fixed current limiting and over-temperature shutdown, which together protect the switch and the load from short-circuit and thermal runaway without external sense resistors or a supervisory controller. The latch function holds the output state after a fault clears until the input is cycled — a deliberate behaviour that prevents automatic restart into a persistent fault condition.