DPC1018S-TR

Overview

The DPC1018S-TR is a single-channel transistor output optocoupler manufactured by Diodes Incorporated. It features an LSOP-4 surface-mount package and provides 5000 Vrms isolation voltage between input and output circuits. The device utilizes a phototransistor output with a minimum collector-emitter voltage of 80 V and a maximum collector current of 30 mA. Key electrical parameters include a forward current of 5 mA, a forward voltage of 1.25 V, and a reverse voltage rating of 6 V. The current transfer ratio ranges from 130% to 260%. Switching characteristics specify rise and fall times of 18 µs each. Power dissipation is rated at 250 mW, with an operating temperature range spanning from -55°C to +110°C.

Feature Summary

• Provides high-voltage electrical isolation via optical coupling for signal transmission
• Integrates a GaAs infrared LED emitter with a silicon phototransistor detector
• Designed for surface-mount assembly in compact LSOP-4 packages

Applications

• Signal isolation in industrial control systems
• Interface circuits for microcontrollers and logic families
• Power supply feedback loops requiring galvanic separation

Procurement Notes

Verify the specific manufacturer part number against official Diodes Incorporated documentation to confirm pinout compatibility and electrical ratings. Ensure that the LSOP-4 package dimensions match the target PCB footprint requirements. Confirm compliance with relevant environmental directives such as RoHS standards before finalizing procurement decisions for production integration.

Selection Notes

Select this component when a single channel of transistor-output isolation is required within a small form factor. The 5000 Vrms insulation rating supports applications demanding robust safety barriers. Consider the 130% to 260% current transfer ratio range for circuit gain calculations. Verify that the 5 mA forward current requirement aligns with the driving source capabilities and that the 80 V collector-emitter voltage exceeds the load voltage expectations.

Part Context

This component belongs to the DPC series of transistor output optocouplers produced by Diodes Incorporated. The series offers various current transfer ratio grades to accommodate different sensitivity requirements while maintaining consistent packaging and isolation specifications. The DPC1018S-TR variant specifically targets applications needing moderate speed and high isolation reliability in space-constrained designs.

Replacement Considerations

Consult official substitution guides for equivalent parts with matching CTR ranges and isolation voltages. Verify pin-to-pin compatibility if replacing directly on existing boards. Ensure alternative components meet the same thermal and electrical stress limits.