SFH618A-3X016

Overview

The SFH618A-3X016 is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It features an NPN phototransistor output and utilizes a through-hole PDIP-4 package. The device provides an insulation voltage of 5300 Vrms, ensuring robust electrical isolation between input and output circuits. Key electrical parameters include a forward current of 60 mA with a forward voltage of 1.65 V. The collector-emitter saturation voltage is specified at 400 mV maximum. Dynamic performance characteristics include a rise time of 3 µs and a fall time of 14 µs. The component supports a maximum collector current of 50 mA and operates within a temperature range of -55°C to +100°C.

Feature Summary

• Provides high-voltage galvanic isolation via 5300 Vrms insulation rating for safe signal transmission across potential differences.
• Delivers fast switching performance with a typical rise time of 3 µs and fall time of 14 µs for efficient digital signal coupling.
• Features a standard four-pin through-hole DIP package designed for reliable mechanical mounting in industrial PCB layouts.

Applications

• Industrial control systems requiring isolated signal interfaces
• Power supply feedback loops for voltage regulation
• Microcontroller input/output isolation in embedded systems

Procurement Notes

Verify the specific suffix '3X016' to confirm the current transfer ratio range of 100% to 200%, as other suffixes indicate different CTR specifications. Ensure the procurement documentation matches the PDIP-4 through-hole package type rather than surface mount variants. Confirm RoHS compliance status through official manufacturer datasheets prior to finalizing orders to meet regulatory standards.

Selection Notes

Select this component when a moderate speed response with 3 µs rise time is sufficient for the application circuit. The 50 mA collector current limit defines the maximum load capacity for the output stage. Consider the 1.65 V forward voltage drop when designing the input drive circuitry to ensure adequate LED activation without exceeding power dissipation limits.

Part Context

This part belongs to the SFH618A series of transistor output optocouplers from Vishay. It shares the same physical footprint and basic isolation architecture with other variants like SFH618A-5X016, differing primarily in the graded Current Transfer Ratio (CTR) bins. The series is designed for general-purpose isolation tasks where cost-effective through-hole solutions are preferred over surface mount alternatives.

Replacement Considerations

Direct substitutes include SFH618A-4X016 and SFH618A-5X016, which share identical pinouts and packages but offer higher CTR ranges of 160-320% and 250-500% respectively. Cross-reference VO618A-4X016 for similar functionality with slight variations in collector voltage ratings.