Your 5.5V rail is getting hammered by transients and your downstream gear keeps tripping. The P4KE 5.5V Zener diode clamps that spike before it reaches the sensitive stuff. Low Zener impedance means it soaks the surge fast. Steady-state rating is 1W, peak standoff hits 6.8A at 400W DC. DO-41 body, runs from −55 °C to 175 °C. Solder it in line and stop chasing phantom resets
| brand | Jaycar |
| part_number | P4KE |
| zener_voltage | 5.5V |
| standoff_current | 6.8A |
| peak_power_rating | 400W DC |
| steady_state_power | 1W |
| package | DO-41 |
| operating_temperature | -55°C to 175°C |
| type | Zener Diode |
| category | Electronics & Components |
| subcategory | Electronic Components |
