SFH615A-3

Overview

The SFH615A-3 is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It features an NPN phototransistor output and operates in a DIP-4 through-hole package. Key electrical parameters include a maximum collector-emitter voltage of 70 V, a maximum collector current of 50 mA, and a forward current rating of 60 mA. The device provides an isolation voltage of 5300 Vrms with a typical rise time of 3 µs and fall time of 14 µs. Current transfer ratio ranges from 100% to 200%, and it functions within a temperature range of -55°C to +100°C.

Feature Summary

• High isolation test voltage of 5300 Vrms for robust signal transmission between isolated circuits
• Fast switching times with low coupling capacitance for efficient data transfer
• Excellent current transfer ratio linearity dependent on forward current
• End-stackable design with .100 inch spacing for compact board layout

Applications

• Signal transmission between electrically isolated sections of industrial control systems
• Interface circuits in measurement and testing equipment requiring high isolation
• Power supply feedback loops where galvanic isolation is critical
• Microcontroller input/output isolation in embedded systems

Procurement Notes

Verify the specific suffix designation when ordering, as variations such as X009T indicate surface mount packaging while standard suffixes denote through-hole DIP configurations. Confirm RoHS compliance status and lead times directly with authorized distributors or the manufacturer, as these details are subject to change and vary by region. Ensure the selected variant matches the required PCB mounting style and thermal management needs for the final assembly.

Selection Notes

Select this component when high isolation voltage and fast switching speeds are required in a single-channel configuration. The NPN phototransistor output suits applications needing direct logic interface capabilities. Consider the operating temperature range and power dissipation limits relative to the ambient environment. Verify that the current transfer ratio meets the minimum drive requirements of the downstream circuitry under expected operating conditions.

Part Context

This component belongs to the SFH615 series of transistor output optocouplers designed for general-purpose isolation applications. The series offers various current transfer ratios and packaging options to accommodate different design constraints. Vishay manufactures these devices using GaAs infrared diodes and silicon phototransistors to ensure reliability and performance consistency across production batches.

Replacement Considerations

The VO615A-3 is listed as a recommended alternative with similar specifications. Verify pinout compatibility and exact electrical parameter tolerances before substitution. Other variants within the SFH615 family may offer different CTR ranges or packaging styles suitable for specific design modifications.