Active TVS for 90V Rails – SMCJ90AE3/TR13
The SMCJ90AE3/TR13 is a unidirectional Zener TVS diode from Microchip Technology, rated for 90V reverse standoff and capable of clamping a 10.3A peak pulse (10/1000µs) to 146V. The 1.5kW peak pulse power rating tells you it can handle a substantial surge — think industrial power supplies, telecom rectifiers, or motor-drive DC buses — without the part failing short. It is housed in a DO-214AB (SMC) package, surface-mount, and supplied on Tape & Reel.
What the Clamping and Breakdown Specs Mean for Your Board
The minimum breakdown voltage is 100V. If your rail sits at 90V nominal, the TVS stays off during normal operation. When a transient pushes the line above 100V, the diode starts to avalanche, and at 146V it clamps the pulse to 10.3A. That 146V ceiling is the number to check against the downstream components' absolute maximum ratings — if your DC-DC converter's input rating is 150V, you have 4V of margin.
Available on Tape & Reel in DO-214AB. No stock-holding claim; availability confirmed at quote time.
