Microchip Technology SMAJ85CAE3/TR13, Zener TVS diode, bidirectional, 85V reverse standoff, 137V clamp at 3.6A, 500W peak pulse, DO-214AC (SMA) surface-mount package, Tape & Reel.
| Parameter | Value |
|---|---|
| Type | Zener |
| Mounting | Surface Mount |
| Voltage - breakdown | 94.4V |
| Voltage - clamping (Max) @ ipp | 137V |
| Voltage - reverse standoff | 85V |
| Current - peak pulse (10/1000μs) | 3.6A |
| Power - peak pulse | 500W |
| Power line protection | No |
| Operating temperature | -65°C~150°C(TJ) |
| Package | Tape & Reel (TR) |
| Applications | General Purpose |
| Case | DO-214AC, SMA |
| Bidirectional channels | 1 |
Its reverse standoff voltage of 85V means it sits across the supply without conducting during normal operation, then breaks down at a minimum of 94.4V to shunt the surge to ground. That clamping ceiling is what the downstream silicon sees — keep it below the absolute maximum rating of the protected IC.
Yes, it is a single bidirectional channel, meaning it clamps both positive and negative transients relative to ground. This is useful for AC-coupled lines or supplies where the surge polarity is unknown.
The unidirectional version SMAJ85A (same 85V standoff, same DO-214AC package) is a direct footprint match but only clamps one polarity. For a bidirectional replacement, any SMAJ85CA from Microchip or a second-source like Littelfuse's SMAJ85CA shares the same ratings and package.