The SMAJ70A-13-F: The reverse standoff voltage is 70V — the rail should never exceed this in normal operation. The minimum breakdown voltage is 77.8V, so the device starts conducting between 77.8V and the clamping voltage of 113V. That 35V window between breakdown and clamp gives the diode room to handle the surge energy without letting the protected circuit see a full spike. Rated for continuous operation from -55°C to 150°C junction temperature, this TVS suits equipment exposed to wide thermal swings — outdoor telecom cabinets, industrial control enclosures, or automotive under-hood environments where the ambient cycles hard.
Housed in the DO-214AC (SMA) package, the SMAJ70A-13-F is a surface-mount device with a low profile suited for dense PCB layouts. The SMA footprint is standard — the cathode band and package outline match the industry-common SMA land pattern, so no special pad geometry is needed.
The base product number is SMAJ70, with the -13-F suffix indicating the tape-and-reel packaging variant. General-purpose application rating means it is not specifically qualified for power-line protection (the Power Line Protection flag is No), so it is best deployed on signal or low-voltage DC buses rather than AC mains.