Gyd-9e Datasheet

| Symptom | Possible Cause | Solution | |---------|----------------|----------| | Output stuck ON (load always powered) | Output triac shorted due to overcurrent or voltage spike | Replace SSR; add snubber (100 Ω + 0.1 µF) across load terminals | | Output stuck OFF (load never turns on) | Input LED or control circuit failed; or output open-circuit | Check control voltage (3–32 V must reach pins). If input diode tests bad, replace. | | Intermittent switching | Loose connection, cold solder joint, or exceeding max ambient temperature | Reflow solder; reduce load current; add forced-air cooling | | Load chatters or buzzes | Input voltage near threshold (2–3 V) | Increase control voltage to >5 VDC | | Overheating | Undersized heatsink | Use derating curve; measure case temp (<85°C) |

| Pin Number | Symbol | Description | |-------------|--------|-----------------| | 1 | IN+ | Positive control voltage (3–32 VDC) | | 2 | IN- | Control voltage ground (common negative) | | 3 | LOAD+ | AC load terminal (L1 – Line input) | | 4 | LOAD- | AC load terminal (L2 – Switched output to load) | | N/C (pin 5) | NC | Not connected (if present, for mechanical stability) | gyd-9e datasheet

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