SFH6156-4

Overview

The SFH6156-4 is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It features an NPN phototransistor output and operates within a surface-mount SMD-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 maximum collector-emitter voltage of 70 V and a maximum collector current of 100 mA. The forward current rating is 60 mA with a typical forward voltage of 1.65 V. The current transfer ratio ranges from 160% to 320%. Switching characteristics specify a rise time of 4 µs and a fall time of 15 µs. Power dissipation is rated at 150 mW, and the unit supports an operating temperature range from -55°C to +100°C.

Feature Summary

• Provides high-voltage isolation capability through a 5300 Vrms dielectric barrier between the infrared LED and phototransistor.
• Delivers precise signal transmission via a dedicated NPN phototransistor output stage designed for digital switching applications.
• Ensures reliable performance across wide thermal conditions with an extended industrial operating temperature range.

Applications

• Industrial control systems requiring galvanic isolation for signal integrity
• Solid-state relay interfaces for switching AC or DC loads
• Microcontroller input/output isolation in embedded hardware designs

Procurement Notes

Verify the specific suffix designation when ordering, as packaging formats vary significantly between tube, reel, and cut tape configurations. Confirm that the selected variant matches the required current transfer ratio binning for the target application circuit. Ensure compliance with RoHS directives and check moisture sensitivity levels prior to soldering processes to maintain component reliability during assembly.

Selection Notes

Select this component when a standard NPN phototransistor output is sufficient for logic-level interfacing tasks. The SFH6156-4 offers a higher current transfer ratio compared to lower-bin variants like the SFH6156-2, making it suitable for applications demanding stronger output drive capabilities. Consider the 4-SMD footprint constraints and verify that the 70 V collector-emitter voltage meets the load requirements of the isolated circuit section.

Part Context

This device belongs to the SFH6156 series of high-reliability optocouplers produced by Vishay. The series utilizes advanced semiconductor technology to achieve consistent current transfer ratios and fast switching speeds. The SFH6156-4 specifically targets applications needing moderate speed and high isolation voltage, distinguishing itself from other series members through its specific CTR binning and standardized SMD packaging options.

Replacement Considerations

Direct substitutes within the same family include the SFH6156-4T (tape and reel packaging) and SFH6156-4X001T. Other variants such as SFH6156-2 or SFH6156-3 share identical pinouts and mechanical dimensions but differ in current transfer ratio specifications. Verify that any replacement part maintains the required 5300 Vrms isolation rating and compatible switching times.