Clamping performance — 28V rail, 45.4V ceiling
The SMAJ28CA-13: When the protected rail exceeds that threshold, the device clamps at 45.4V maximum while shunting 8.8A of peak pulse current (10/1000µs waveform). Peak pulse power is rated at 400W — adequate for suppressing transients on 24V DC supplies, sensor lines, or I/O rails in industrial control panels where the energy content of a typical surge stays below that limit.
Package and board-fit — DO-214AC (SMA)
Supplied in a DO-214AC (SMA) surface-mount package, the SMAJ28CA-13 is intended for reflow assembly on standard FR-4 boards. The operating junction temperature range spans -55°C to +150°C, which covers both commercial and extended industrial environments without derating concerns.