Is there a pin-compatible replacement for GL3528(10-20K)?

While no replacement is guaranteed to be pin-to-pin without a full datasheet comparison, GL5626（10-15K） is the strongest candidate. It uses the same package type and has 2 pins, making it very likely to be a form-fit match. Other options like GL5528 are electrically similar but have different packages and are not pin-compatible.

What risks should I check before replacing GL3528(10-20K)?

Before replacing GL3528(10-20K), first check the package dimensions to ensure a physical fit. Second, verify that any differences in secondary parameters, like the lower power rating (90mW) of GL5626 or the different dark resistance of other parts, are within your circuit's tolerance.

GL3528(10-20K) Alternatives, Datasheet & Cross Reference | HL (Haolin Elec)

The GL3528(10-20K) is a miniature CdS photoresistor for light sensing applications. Several functional alternatives are available, with GL5626（10-15K） being a strong candidate due to its matching package and light resistance.

AI replacement insight

Electrical risklow

Several candidates match key electricals like light resistance and voltage. Minor differences in power or dark resistance are the main check points.

Package riskmedium

Some alternatives have different packages (e.g., Radial) requiring board redesign. Even for matching package types, physical dimensions should be verified.

Sourcing risklow

Photoresistors are a mature technology with multiple vendors offering similar parts, suggesting good availability of alternatives.

Can it be replaced directly?

No confirmed direct drop-in replacement exists. However, GL5626（10-15K） is a strong candidate with a matching package and key electricals, but requires review of its slightly lower power rating.

Best replacement path

GL5626（10-15K） is the most promising alternative. It shares the same package type and critical light resistance range. Engineers should verify the slightly lower power rating (90mW vs 100mW) is acceptable.

Main risk

The primary risk when substituting is ensuring mechanical fit and tolerance for minor parametric differences, such as power rating or dark resistance.

Recommended alternatives

Strong functional match with same package and light resistance, but has a slightly lower power rating.

View details

Alternative comparison matrix

Feature / factor	GL3528(10-20K)	GL5626（10-15K）	GL5528	Compatibility / risk
Package	Miniature Open Frame	Miniature Open Frame	Radial, 5mm	Miniature Open Frame / Radial, 5mm — Package type matches, but physical dimensions require verification.; GL5528: Package is different (Radial vs Miniature Open Frame) and will require board layout changes.
Resistance	1 MΩ	2 MΩ	10-20 kΩ	2 MΩ / 10-20 kΩ — Candidate has higher dark resistance.; GL5528: Light resistance at 10 Lux matches.
Power	100 mW	90 mW	100 mW	90 mW / 100 mW — Candidate has slightly lower max power rating.; GL5528: Max power rating matches.
Voltage	150 V	150 V	150 V	150 V — Max voltage matches.; GL5528: Max voltage rating matches.

Application & sourcing insights

Questions & answers

The best alternative for GL3528(10-20K) is likely GL5626（10-15K）. It features the same 'Miniature Open Frame' package and identical 10-20kΩ light resistance. However, you must verify its slightly lower 90mW power rating is suitable for your design.