QT4504

Overview

The QT4504 is a high-speed optocoupler manufactured by QT Brightek (QTB). It features a single channel with an infrared emitting diode input and a phototransistor output. The device provides electrical isolation of 5000Vrms between input and output circuits. It is housed in an 8-DIP package with a pin pitch of 7.62mm. The component supports a DC input type and offers a typical switching time of 350ns for both turn-on and turn-off operations. It operates within a temperature range of -55°C to 100°C.

Feature Summary

• High-speed operation with 350ns switching times
• 5000Vrms electrical isolation capability
• Single-channel configuration with phototransistor output

Applications

• High-speed data transmission interfaces
• Industrial control systems requiring signal isolation
• Computer peripheral interface circuits

Procurement Notes

Verify the specific datasheet version for the QT4504, as it may share characteristics with similar models like the QT4502 or 6N138 series from the same manufacturer. Confirm that the 8-DIP package dimensions match your PCB footprint requirements. Ensure the operating temperature range meets your environmental specifications. Check for RoHS compliance status if required by your manufacturing standards. Validate the isolation voltage rating against your safety regulations.

Selection Notes

Select the QT4504 when high-speed signal transfer is critical compared to standard optocouplers. Consider its 5000Vrms isolation for applications requiring robust noise immunity. Evaluate the 8-DIP package compatibility with existing assembly processes. Compare its switching speed against other available options if timing constraints are tight. Ensure the phototransistor output current capability suits the load requirements of the receiving circuit.

Part Context

The QT4504 belongs to the family of high-speed optocouplers produced by QT Brightek. It is designed for applications demanding fast response times and reliable electrical isolation. Similar products in the QTB lineup include the QT4502 and various 6N13x series devices. These components are commonly used in digital communication interfaces where signal integrity and isolation are paramount. The 8-DIP format ensures compatibility with through-hole mounting technologies.

Replacement Considerations

Public confirmed substitute part numbers: None identified.