Its 500 W peak pulse power rating (10/1000 µs waveform) and 114 V clamp voltage at 4.4 A peak pulse current define the surge it can absorb before the protected circuitry sees excess stress. The DO-214AC (SMA) package is a common surface-mount footprint for board-level protection in power supplies, industrial controls, and telecom equipment.
Active production — no replacement needed
Microchip lists the SMAJ64E3/TR13 as Active.
The reverse standoff voltage of 64 V is the maximum continuous DC voltage the TVS can sit across without conducting. When a surge exceeds the minimum breakdown voltage of 71.1 V, the device starts clamping. The clamp voltage of 114 V at 4.4 A is the peak voltage the protected load sees during the surge — verify that the downstream components (MOSFETs, ICs, capacitors) are rated above 114 V at the expected surge duration.
Sourcing and ordering for the BOM line
The SMAJ64E3/TR13 is available through our distribution channel. Because it is an active Microchip part with no known end-of-life, lead times are standard for the DO-214AC package family.