SFH620A-1

Overview

The SFH620A-1 is a single-channel transistor output optocoupler manufactured by Vishay Semiconductors. It features an NPN phototransistor output and utilizes a DIP-4 through-hole package. The device provides an insulation voltage of 5300 Vrms, ensuring robust electrical isolation. Key electrical parameters include a maximum collector-emitter voltage of 70 V and a maximum collector current of 100 mA. The forward current is rated at 60 mA with a forward voltage of 1.65 V. The current transfer ratio ranges from 40% to 125%. Switching characteristics include rise and fall times of 2 µs each. Power dissipation is limited to 250 mW, and the operating temperature range spans from -55°C to +100°C.

Feature Summary

• Provides high-voltage isolation with 5300 Vrms insulation rating for safe signal transmission between isolated circuits.
• Features a standard NPN phototransistor output suitable for interfacing with digital logic and microcontroller inputs.
• Designed for through-hole mounting in a compact DIP-4 package, facilitating easy integration into printed circuit boards.

Applications

• Isolation of control signals in AC mains-powered equipment
• Interface between low-voltage logic circuits and high-voltage switching loads
• Signal transmission in industrial automation systems requiring galvanic isolation

Procurement Notes

Verify the specific manufacturer part number against official Vishay documentation to ensure authenticity. Confirm that the component matches the required DIP-4 package and electrical specifications for your design. Check RoHS compliance status as indicated in the product datasheet. Ensure that the supplier provides valid traceability documents. Validate that the received units meet the specified current transfer ratio and insulation voltage requirements before implementation.

Selection Notes

Select this component when a single-channel isolation solution with moderate speed and high voltage capability is required. The SFH620A-1 is appropriate for applications needing reliable galvanic separation between input and output sides. Consider the 40-125% current transfer ratio range when designing biasing networks. Ensure the PCB layout supports the through-hole DIP-4 footprint. Verify that the thermal environment stays within the -55°C to +100°C operating range for long-term reliability.

Part Context

The SFH620A-1 belongs to the SFH series of optocouplers produced by Vishay Semiconductor Opto Division. This series includes various configurations tailored for different isolation needs. The SFH620A-1 specifically targets general-purpose isolation tasks where cost-effectiveness and standard packaging are prioritized. It complements other variants in the family that may offer different current transfer ratios or package types.

Replacement Considerations

Direct substitutes within the same family include SFH620A-2 and SFH620A-3, which share similar electrical characteristics but differ in current transfer ratio ranges. Verify pin compatibility and package dimensions before substitution. Ensure that any replacement part meets the same insulation voltage and current ratings required by the original design.