TLP521GB

Transistor, Photovoltaic Output Optoisolators Overview

The TLP521GB is a single-channel optocoupler from Isocom Components, featuring an infrared LED and NPN silicon phototransistor. It utilizes a 4-pin DIP package with a 10mm pin spacing, indicated by the 'G' suffix. Key electrical parameters include a maximum forward current of 50mA, a typical forward voltage of 1.15V, and a high isolation voltage of 5300Vrms. The device offers a minimum current transfer ratio (CTR) of 50% and supports a collector-emitter saturation voltage of 400mV at specific test conditions. Operating temperatures range from -30°C to +100°C.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• High isolation voltage capability for safe signal transmission across potential barriers
• High current transfer ratio ensuring efficient signal coupling between input and output
• Robust construction using infrared LED and NPN phototransistor technology
• Space-saving dual in-line plastic package design suitable for through-hole mounting

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial control systems requiring galvanic isolation
• Power supply units for feedback loop isolation
• Signal transmission in noisy electrical environments
• Microcontroller interface circuits for level shifting and protection

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix 'GB' confirms the 10mm pin spacing DIP-4 package variant. Ensure the required current transfer ratio meets the minimum 50% specification for the target circuit design. Confirm that the 5300Vrms isolation rating aligns with safety standards applicable to the end application. Cross-reference datasheet limits for forward current and operating temperature ranges before integration.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high isolation voltage and reliable digital switching are required in a standard DIP footprint. The 50% minimum CTR distinguishes it from lower-performance variants. Consider the 10mm pin pitch if board layout constraints require wider spacing compared to standard 7.62mm packages. Evaluate thermal dissipation requirements given the 200mW total power dissipation limit under continuous operation.

Transistor, Photovoltaic Output Optoisolators Part Context

The TLP521 series represents a family of transistor-output optocouplers designed for general-purpose isolation. The TLP521GB specifically denotes the single-channel version with extended pin spacing. This series is widely used as a replacement for legacy components in industrial and consumer electronics where robust electrical isolation is critical for system safety and noise immunity.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct replacements include other single-channel DIP-4 optocouplers with comparable CTR and isolation ratings. Verify pinout compatibility and package dimensions when substituting. Ensure the alternative device meets the same 5300Vrms isolation requirement and operates within the specified temperature range.