48V rail clamp — unidirectional, 1.5 kW peak pulse
Its reverse standoff voltage of 48V means it sits across the supply without conducting until a surge exceeds the breakdown threshold — no leakage penalty on the rail during normal operation. Rated for 1500W peak pulse power per the 10/1000 µs waveform, it clamps at 85.5V maximum while handling 17.5A peak pulse current. That combination suits it for industrial 48V bus protection, telecom rectifier outputs, or battery-backed DC supplies where the surge energy is moderate but the rail voltage is well above the 12V/24V common range.
DO-214AB (SMC) package — surface-mount footprint
Housed in the DO-214AB (SMC) package, the SMCJ48E3/TR13 offers a compact surface-mount solution with the supplier device package also designated DO-214AB (SMCJ). The SMC body size is larger than the smaller SMA/SMB siblings, which helps dissipate the heat from repeated surge events — a practical consideration when the TVS is placed near the input connector on a 48V board. Operating temperature range from -65°C to 150°C covers the full industrial and automotive under-hood envelope — no derating concern for outdoor or engine-bay placement.
Microchip lists the SMCJ48E3/TR13 as Active, meaning no end-of-life notice is pending and standard factory lead times apply.