TIL191BX

Overview

The TIL191BX is a single-channel optocoupler manufactured by Isocom Components 2004 LTD. It integrates an infrared LED with an NPN silicon phototransistor in a 4-pin DIP package. The device provides electrical isolation with a rated voltage of 5300Vrms. It features a minimum current transfer ratio of 20% and supports a maximum collector current of 50 mA. The component is RoHS compliant and designed for high-density mounting applications requiring reliable signal transmission across isolated circuits.

Feature Summary

• Integrates an infrared light emitting diode and an NPN silicon phototransistor within a single compact unit.
• Provides high-voltage electrical isolation between input and output circuits to prevent noise interference.
• Utilizes a 4-pin dual in-line package structure suitable for standard PCB mounting techniques.

Applications

• Signal isolation in industrial control systems
• Interface circuits for microprocessor-based logic systems
• Switching power supply feedback loops

Procurement Notes

Verify the specific suffix BX against official Isocom documentation to confirm pinout configuration and packaging specifications. Ensure that the procurement source provides valid datasheets confirming the 5300Vrms isolation rating and transistor output characteristics. Cross-reference the part number with authorized distributors to guarantee authenticity and compliance with RoHS standards before finalizing orders.

Selection Notes

Select this component when a single-channel isolation solution with moderate current handling capabilities is required. The 50 mA collector current limit defines its suitability for driving low-power loads or logic inputs. Consider the 4-pin DIP form factor for compatibility with existing through-hole manufacturing processes. Evaluate the 20% minimum current transfer ratio to ensure adequate signal gain for the intended application circuit design.

Part Context

The TIL191 series belongs to Isocom's lineup of high-density optically coupled isolators. These devices are engineered to replace traditional relay-based isolation methods in space-constrained designs. The BX variant specifically denotes a particular packaging or testing configuration within the broader TIL191 family, maintaining the core functional architecture of LED-to-phototransistor optical coupling.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with direct replacements by matching pin configurations, isolation voltages, and current transfer ratios using official manufacturer cross-reference guides.