Bidirectional 43V TVS for general-purpose rail clamping
The SMAJ43CA-13-F: Rated for 400W peak pulse power, this part sits in the standard SMAJ power class — adequate for secondary protection on 24V and 36V rails where the upstream series impedance limits the surge current. The single bidirectional channel means symmetrical clamping for AC-coupled or floating lines where polarity is not fixed.
Package, footprint, and temperature grade
Housed in the DO-214AC (SMA) package with supplier device package designation SMA, the footprint is shared across the SMAJ family — a single copper pad pattern on the PCB serves the full voltage range from 5V to 188V. The junction temperature range spans -55°C to 150°C, covering industrial enclosures and automotive underhood environments where ambient peaks at 125°C leave 25°C margin for self-heating during a transient. Supplied in Tape & Reel (TR) or Cut Tape (CT) options, the reel quantity suits automated pick-and-place for volume production. Surface-mount termination means no through-hole soldering step — the reflow profile follows standard SAC305 solder paste recommendations for the SMA body size.
Active production and sourcing posture
No official second-source or pin-compatible cross-reference is recorded for this specific bidirectional 43V variant. The SMAJ family is widely second-sourced across the TVS industry — parametric equivalents from other manufacturers exist at the same 43V standoff and 400W rating, but pinout and package dimensions should be verified against the DO-214AC footprint before substituting.