DPC817W-C-TU

Overview

The DPC817W-C-TU is a single-channel transistor output optocoupler manufactured by Diodes Incorporated. It features an MDIP-4 through-hole package with 5000 Vrms isolation voltage. The device utilizes a phototransistor output and supports a maximum collector current of 30 mA and collector-emitter voltage of 35 V. Key electrical parameters include a forward voltage of 1.25 V at 5 mA forward current, a saturation voltage of 200 mV, and rise/fall times of 18 µs. The Current Transfer Ratio (CTR) for the C-rank variant typically ranges from 200% to 400%, ensuring reliable signal transmission across the isolation barrier.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits via a phototransistor interface.
• Offers robust signal transmission capabilities suitable for digital and analog switching applications.
• Designed for through-hole mounting in compact MDIP-4 packages for standard PCB integration.

Applications

• Industrial control systems requiring galvanic isolation
• Consumer electronics power supply feedback loops
• Signal isolation in microcontroller interfacing circuits

Procurement Notes

Verify the specific CTR ranking suffix (e.g., -C-) against project requirements, as performance varies significantly between ranks. Confirm package type and tube packaging quantities with the distributor. Ensure compliance with RoHS directives if applicable. Cross-reference datasheet revisions to confirm parameter stability before finalizing procurement orders.

Selection Notes

Select this component when 5000 Vrms isolation is required in a low-cost, through-hole format. The C-rank offers higher gain than A or B ranks, reducing required drive current. Verify that the 30 mA collector current limit meets load requirements. Consider thermal dissipation limits if operating near maximum ratings. Compare rise/fall times against system speed requirements.

Part Context

This part belongs to the DPC817W series, which are general-purpose optocouplers designed for replacing traditional relay contacts in solid-state applications. The series provides various CTR rankings to accommodate different drive conditions. The 'W' indicates wide body packaging, while 'TU' denotes tube packaging. It serves as a direct functional replacement for legacy 817-series components in many designs.

Replacement Considerations

Direct substitutes include other 817-series optocouplers such as PC817 or EL817, provided pinouts and isolation voltages match. Verify that alternative parts meet the same 5000 Vrms isolation and 30 mA collector current specifications. Check CTR compatibility if driving sensitive loads. Ensure package dimensions align with existing footprints.

FAQ

What is the typical Current Transfer Ratio (CTR) for the DPC817W-C-TU?

The C-rank designation typically indicates a CTR range of 200% to 400% at a forward current of 5 mA and collector current of 1 mA.

Does the isolation voltage change with temperature?

The rated 5000 Vrms isolation voltage is a dielectric strength rating. While insulation resistance may vary with humidity and temperature, the breakdown voltage rating remains constant under normal operating conditions as per datasheet specifications.