What the 1500W rating means for your protection design
The 1.5SMC18CA: For a 24V DC bus or a 12V automotive rail, the 15.3V reverse standoff means it sits across the line without conducting under normal operation, then clamps at 25.2V when a transient hits, shunting up to 60.3A away from the protected circuit. The bidirectional channel means one device protects against both positive and negative surges — useful on AC signal lines or DC rails where reverse polarity is a risk.
Active lifecycle — no EOL risk for current BOMs
This is a standard-production part in the 1.5SMC series, widely used across general-purpose circuit protection applications.