Q817B

Overview

The Q817B is a single-channel optoisolator manufactured by QT Brightek (QTB). It features a DC input and a transistor output, housed in a 4-DIP package with through-hole mounting. The device provides an isolation voltage of 5000Vrms. Key electrical parameters include a maximum collector-emitter voltage of 35V, a maximum forward current of 60mA, and a typical forward voltage of 1.24V. The output can handle up to 50mA per channel. The current transfer ratio ranges from 200% to 400% at a forward current of 5mA. Saturation voltage is typically 200mV. Response times are approximately 6µs for rise and 8µs for fall. It operates within a temperature range of -55°C to 110°C.

Feature Summary

• Provides robust electrical isolation strength of 5000Vrms between input and output circuits.
• Features high output current and voltage specifications suitable for various driving applications.
• Utilizes a standard 4-DIP package design for reliable through-hole integration.

Applications

• General-purpose signal isolation in electronic circuits
• Driving applications requiring flexible output specifications
• Microcontroller interface isolation

Procurement Notes

Verify the specific suffix against official QT Brightek documentation to confirm exact performance characteristics, as variations may exist within the Q817 series. Ensure the component meets required isolation voltage standards for the target application. Cross-reference the manufacturer part number with authorized distributor listings to confirm authenticity and availability status before finalizing procurement decisions.

Selection Notes

Select this component when a single-channel transistor output optocoupler with high isolation voltage is required. Consider the 5000Vrms rating for safety-critical interfaces. Evaluate the 50mA output current capability against load requirements. The wide operating temperature range supports use in harsh environments. Confirm package compatibility with existing PCB footprints.

Part Context

The Q817B belongs to the Q817 series of optoisolators produced by QT Brightek. This series is designed for general-purpose isolation tasks. The Q817B specifically denotes the variant with transistor output characteristics. It shares the same physical footprint and basic isolation principles as other members of the family, differing primarily in internal phototransistor specifications.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult official manufacturer cross-reference guides for verified alternatives.