1500W Zener TVS in DO-214AB – SMCJ22AE3/TR13
The SMCJ22AE3/TR13 is a unidirectional Zener TVS diode from Microchip Technology, rated for 1500W peak pulse power at 10/1000µs waveform. It protects a single DC rail with a 22V reverse standoff voltage, clamping transients to 35.5V maximum at 42.2A peak pulse current. Housed in a surface-mount package, it suits general-purpose transient suppression on power supplies, telecom lines, and industrial control inputs.
Clamping and surge ratings for rail protection
The 22V reverse standoff voltage means the diode does not conduct at normal rail voltage up to 22V, making it a fit for 18V or 24V nominal rails where the DC bus stays below that threshold. When a surge hits, the breakdown voltage minimum is 24.4V, and the clamping voltage is held to 35.5V maximum at the rated 42.2A peak pulse current. That clamping ceiling tells the downstream circuit designer what voltage the load must survive. The 1500W peak pulse power is the headline energy rating — at lower peak currents the clamping voltage drops, but the 1.5kW capability covers most industrial surge requirements.
Active production – sourcing and lifecycle
That means the BOM line is stable for ongoing builds and future last-time-buy planning is not needed yet.