TLP185(TPR,E)

Overview

The TLP185(TPR,E) is a single-channel transistor output optocoupler manufactured by Toshiba Semiconductor and Storage. It features a compact surface-mount package with four pins, designed for efficient signal transmission while maintaining electrical isolation between input and output circuits. The device provides an isolation voltage of 3750 Vrms, ensuring robust protection against high-voltage transients. Key electrical parameters include a maximum forward current of 50 mA and a collector-emitter breakdown voltage of 80 V. The unit operates within a temperature range of -55°C to +110°C, supporting reliable performance in demanding industrial environments.

Feature Summary

• Provides high-voltage electrical isolation between input LED and output phototransistor circuits
• Delivers fast switching response times suitable for digital signal transmission applications
• Features a compact surface-mount package design for automated PCB assembly processes

Applications

• Digital I/O interface isolation in programmable logic controllers
• Feedback control loop isolation in switch-mode power supplies
• Signal level translation between microcontrollers and high-voltage loads

Procurement Notes

Verify the specific suffix designation to confirm the exact current transfer ratio grade and packaging configuration. Ensure that the selected variant meets the required isolation voltage standards for your application safety certification. Cross-reference the datasheet pinout to confirm compatibility with your printed circuit board footprint before finalizing component orders.

Selection Notes

Select this component when high isolation voltage and moderate speed are required for digital signal coupling. Consider the current transfer ratio requirements based on the load conditions connected to the phototransistor collector. Evaluate thermal management needs given the operating temperature range and power dissipation limits specified in the official documentation.

Part Context

This component belongs to the TLP185 series of transistor output optocouplers from Toshiba. The series is widely recognized for its reliability in industrial automation and power electronics. Variants within the family differ primarily in current transfer ratio grades and packaging options, allowing designers to optimize for cost or performance without changing the fundamental isolation architecture.

Replacement Considerations

Consult official Toshiba substitution guides for direct replacements. Verify pin compatibility and electrical parameter equivalence before integrating alternative components into existing designs.