The SMBJ15CA-13-F: With a 15 V reverse standoff voltage, it clamps transients at 24.4 V max while conducting 24 A peak pulse current — the protection window sits tight enough to shield 15 V rails from surge events without nuisance triggering on normal ripple.
Bidirectional clamping for signal and data lines
A single bidirectional channel means the same device protects both positive and negative transients on a signal pair — useful for RS-485, CAN, or audio lines where the signal swings around ground. The minimum breakdown voltage of 16.7 V ensures the diode stays off during normal operation up to the 15 V standoff, then avalanches cleanly when a surge exceeds that threshold.
Power line protection is not specified, so this device is best suited for signal and data line transient suppression rather than AC mains or DC power bus clamping.