GL5506（4-7K）
JCHL
Needs validationmedium risk
GL5506 is a close 5mm LDR candidate, but its 10Lux resistance is lower than GL5516.
Best Alternatives to GL5516
GL5516 is a 5mm CdS photoresistor. The closest supplied alternatives need FAE review because pinout and datasheet checks are pending.
AI replacement insight
Electrical riskmedium
R-light, dark R, and power margin differ.
Package riskmedium
5mm TH matches, but lead details need check.
Firmware risklow
Analog threshold may need calibration.
Sourcing riskmedium
Lifecycle is not clearly stated.
Can it be replaced directly?
Direct replacement for GL5516 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Review GL5506 first for same package and close LDR behavior; GL5616 is a cross-vendor option.
Main risk
Light-resistance curve and pin/lead details can shift circuit thresholds.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | GL5516 | GL5506（4-7K） | GL5616（5-10K） | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 5mm TH | 5mm TH | 5mm TH | 5mm TH — same mounting class; GL5616（5-10K）: same package class | |
| Pinout | 2 pin | 2 pin | 2 pin | 2 pin — pinout not checked; GL5616（5-10K）: pinout not checked | |
| Resistance | 5-10kΩ; dark 0.5MΩ | 4-7kΩ; dark 0.5MΩ | 5-10kΩ; dark 0.8MΩ | 4-7kΩ; dark 0.5MΩ / 5-10kΩ; dark 0.8MΩ — lower light R; GL5616（5-10K）: higher dark R | |
| Voltage | 150V | 150V | 150V | 150V — no 1.1x margin; GL5616（5-10K）: no 1.1x margin | |
| Power | 90mW | 90mW | 100mW | 90mW / 100mW — no derating gain; GL5616（5-10K）: still below 1.5x rule |
Application & sourcing insights
Questions & answers
Verified drop-in options for GL5516 are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.