SFH608-2

Overview

The SFH608-2 is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It features an NPN phototransistor output housed in a PDIP-6 through-hole package. The device provides an insulation voltage of 5300 Vrms and supports a maximum collector-emitter voltage of 55 V with a peak collector current of 50 mA. The forward current is rated at 50 mA, with a typical forward voltage of 1.5 V. The current transfer ratio ranges from 63% to 125%. Electrical characteristics include a maximum collector-emitter saturation voltage of 400 mV, a reverse voltage of 6 V, and power dissipation of 150 mW. Switching times are specified as 5 µs rise time and 7 µs fall time. The component operates within a temperature range of -55°C to +100°C.

Feature Summary

• High current transfer ratio capability at low input currents
• Integrated base connection for improved switching speed control
• Robust insulation performance suitable for high-voltage isolation applications

Applications

• Industrial control systems requiring signal isolation
• Power supply feedback loops
• Communication interface isolation

Procurement Notes

Verify availability status carefully as the SFH608-2 is listed as obsolete or end-of-life by the manufacturer. Confirm if alternative distributors hold remaining stock or if replacement components are required. Ensure that the PDIP-6 through-hole package format meets the target PCB design constraints before procurement. Check RoHS compliance details against specific project requirements.

Selection Notes

Select this component when a high current transfer ratio is needed at low drive currents. The integrated base pin allows for faster turn-off times compared to standard phototransistors. Consider the PDIP-6 package size and through-hole mounting requirements. Verify that the 5300 Vrms isolation rating meets the safety standards of the application environment.

Part Context

The SFH608 series includes variants like SFH608-3 and SFH608-4, which differ primarily in their current transfer ratio specifications. The SFH608-2 specifically targets applications requiring a CTR between 63% and 125%. This family is designed for general-purpose isolation where moderate speed and high reliability are prioritized over ultra-high speed performance found in other Vishay families.

Replacement Considerations

Public confirmed substitute part numbers: None available.