The SMCJ48CA-13: It is designed for general-purpose circuit protection where a single device clamps transients on both polarities. The 53.3 V minimum breakdown voltage gives the designer a clear avalanche threshold above the 48 V working rail.
The DO-214AB (SMC) package is a JEDEC-standard footprint with a large copper tab on the cathode side — in a bidirectional device both terminals are equivalent, so orientation is non-polar. Available in Tape & Reel (TR) or Cut Tape (CT) options, the part is pick-and-place ready. The SMC body is large enough that hand rework with a hot-air station is straightforward — the package markings include the full part code, so identification after reflow is unambiguous.