TLP121(GB-TPL,F)

Overview

The TLP121(GB-TPL,F) is a single-channel transistor output optocoupler manufactured by Toshiba Semiconductor and Storage. It integrates a gallium arsenide infrared emitting diode with a phototransistor in a compact surface-mount package. The device provides an isolation voltage of 3750Vrms and supports a collector-emitter breakdown voltage of at least 80V. The GB rank ensures a minimum current transfer ratio of 100% at a forward current of 5mA. It operates within a temperature range of -25°C to 85°C.

Feature Summary

• Integrates a GaAs infrared LED with a phototransistor for optical signal transmission
• Provides high electrical isolation between input and output circuits
• Features a low-profile surface-mount package suitable for automated assembly

Applications

• Office machines such as copiers and printers
• Programmable controllers and industrial I/O modules
• Telecommunication equipment interfaces

Procurement Notes

Verify the specific suffix (TPL,F) against official Toshiba documentation to confirm package type and tape-and-reel specifications. Ensure compliance with RoHS directives if required, noting that some historical variants may differ. Confirm lead times and availability directly with authorized distributors, as stock levels fluctuate. Validate that the component meets all environmental and safety certifications relevant to the target application region.

Selection Notes

Select this component when a small form factor is required for AC/DC input modules or logic interfacing. The GB rank offers higher current transfer ratio consistency compared to standard ranks. Consider the 80V collector-emitter voltage rating for switching applications. Verify that the surface-mount footprint matches the PCB design constraints and that the operating temperature range aligns with the system environment.

Part Context

This part belongs to the TLP121 series of mini flat couplers designed for space-constrained applications. The series is widely used in office automation and industrial control systems where reliable galvanic isolation is necessary. The specific variant includes packaging and ranking details indicated by the suffix codes, distinguishing it from through-hole or different ranking versions within the same family.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Evaluate alternative transistor-output optocouplers with similar isolation ratings and pin configurations only after verifying functional compatibility with the existing circuit design.