SFH6156-2

Overview

The SFH6156-2 is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It features an NPN phototransistor output and utilizes surface-mount SMD-4 packaging. The device provides high isolation with a rated insulation voltage of 5300 Vrms. Key electrical parameters include a maximum collector-emitter voltage of 70 V, a maximum collector current of 100 mA, and a power dissipation of 150 mW. The forward current rating is 60 mA with a forward voltage of 1.65 V. The current transfer ratio ranges from 63% to 125%. Typical switching times are 2 µs for both rise and fall durations.

Feature Summary

• Provides galvanic isolation between input and output circuits using infrared LED and phototransistor technology.
• Features a compact surface-mount package designed for automated assembly processes.
• Delivers high dielectric strength to protect sensitive control electronics from high voltage transients.

Applications

• Industrial automation control systems requiring signal isolation
• Power supply feedback loops for voltage regulation
• Solid-state relay driver circuits

Procurement Notes

Verify the specific suffix code on the component marking to confirm the exact current transfer ratio bin and packaging type. Ensure that the procurement source provides valid RoHS compliance documentation as required by regulatory standards. Cross-reference the manufacturer part number with official Vishay distribution channels to avoid counterfeit components. Confirm that the delivered units match the specified SMD-4 package dimensions for proper PCB footprint compatibility.

Selection Notes

Select this component when a moderate current transfer ratio between 63% and 125% is sufficient for the application logic levels. Consider the 5300 Vrms isolation rating for applications involving high-voltage separation requirements. Evaluate the 2 µs switching speed against the system's timing constraints to ensure adequate response rates. Compare the 100 mA collector current limit against the load requirements to prevent saturation issues during operation.

Part Context

This component belongs to the SFH series of optocouplers from Vishay, which are designed for general-purpose isolation applications. The series offers various current transfer ratio bins to accommodate different sensitivity requirements in digital and analog signal transmission. The SFH6156-2 specifically targets cost-sensitive designs while maintaining reliable performance in industrial environments.

Replacement Considerations

SFH6156-2T

FAQ

What is the typical switching speed of the SFH6156-2?

The typical rise and fall times are both 2 microseconds.

Does the SFH6156-2 support automotive qualification?

No, the SFH6156-2 is not AEC-Q102 qualified; automotive versions require specific suffixes or different part numbers within the family.