500 W bidirectional Zener TVS in a SQ-MELF B package
The bidirectional single-channel configuration means it clamps both polarities, simplifying layout on AC or bipolar DC rails. Housed in a surface-mount SQ-MELF B package, this part is suited for general-purpose circuit protection where board space is constrained but a hermetic glass-passivated die is preferred for reliability.
The 22.3 V maximum clamping voltage at 22.4 A defines the upper voltage the protected circuitry sees during a surge. For a 12 V nominal rail, the 12.2 V standoff leaves margin below the clamp threshold; the 500 W peak pulse rating handles typical industrial transient events per IEC 61000-4-5 if the source impedance is high enough. Because power line protection is not specified, this device is intended for signal or low-power secondary-side rails rather than mains input stages. The bidirectional nature eliminates orientation concerns during assembly — a practical advantage for high-mix production.