SFH6156-4T

Overview

The SFH6156-4T is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It features an NPN phototransistor output and operates with a maximum collector-emitter voltage of 70 V and a peak forward current of 60 mA. The device provides high isolation capability with an insulation voltage of 5300 Vrms. Key electrical parameters include a typical forward voltage of 1.65 V, a maximum collector-emitter saturation voltage of 400 mV, and a power dissipation rating of 150 mW. The component supports a wide operating temperature range from -55°C to +100°C and utilizes a compact 4-SMD surface-mount package.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits
• Features fast switching characteristics suitable for digital signal transmission
• Offers high current transfer ratio for efficient signal coupling

Applications

• Industrial control systems requiring galvanic isolation
• Signal isolation in microprocessor-based circuits
• Power supply feedback loops for noise immunity

Procurement Notes

Verify the specific suffix designation to confirm the current transfer ratio bin, as variants exist within the SFH6156 family. Ensure the ordering code matches the required packaging format, such as cut tape or reel, for automated assembly compatibility. Cross-reference the manufacturer datasheet to validate compliance with relevant safety certifications like UL and EN before finalizing procurement specifications.

Selection Notes

Select this component when high isolation voltage and moderate speed are required for single-channel applications. Consider the NPN phototransistor output configuration for standard logic interfacing. Evaluate the thermal management requirements given the 150 mW power dissipation limit and the operational temperature range. Compare the current transfer ratio specifications against the driving circuit capabilities to ensure reliable switching performance under varying conditions.

Part Context

This component belongs to the SFH6156 series of high-reliability optocouplers designed for demanding industrial environments. The series emphasizes robust insulation and consistent performance across wide temperature ranges. The SFH6156-4T specifically denotes a variant with defined current transfer ratio characteristics, distinguishing it from other bins in the product line while sharing the same physical footprint and basic electrical architecture.

Replacement Considerations

SFH6156-4X001T is a documented substitute part number within the same series offering identical functional specifications.