SFH610AX Optocoupler Technical Summary

Overview

The SFH610AX is a high-performance optocoupler designed for applications requiring reliable signal isolation and high current transfer efficiency. This component features a GaAs infrared emitting diode optically coupled to a silicon planar phototransistor detector, all housed in a compact plastic DIP-4 package. The SFH610AX is engineered to deliver superior performance in terms of current transfer ratio (CTR), low coupling capacitance, and high isolation voltage, making it suitable for a wide range of industrial and consumer applications.

Features

• High Current Transfer Ratio (CTR): Ensures efficient signal transmission between input and output.
• Low Coupling Capacitance: Minimizes noise and improves signal integrity in high-frequency applications.
• High Isolation Voltage: Provides robust electrical isolation between input and output circuits, enhancing safety and reliability.
• GaAs Infrared Emitting Diode: Offers high efficiency and long operational life.
• Silicon Planar Phototransistor Detector: Delivers fast response times and consistent performance.
• Plastic DIP-4 Package: Compact and easy to integrate into various circuit designs.

Applications

The SFH610AX is versatile and can be used in a variety of applications where electrical isolation and signal transmission are critical. Some common applications include:

• Industrial Control Systems: Isolates sensitive control circuits from high-voltage or noisy environments.
• Power Supply Feedback Circuits: Provides feedback isolation in switch-mode power supplies (SMPS).
• Medical Equipment: Ensures patient safety by isolating sensitive medical electronics from power lines.
• Telecommunications: Protects communication circuits from voltage surges and noise.
• Automotive Electronics: Used in vehicle control systems where isolation and reliability are paramount.
• Consumer Electronics: Isolates signals in audio and video equipment to prevent ground loops and noise interference.

Electrical Characteristics

The following table summarizes the key electrical characteristics of the SFH610AX under standard operating conditions (unless otherwise specified):

Absolute Maximum Ratings

• Input Forward Current (I_F): 60 mA
• Reverse Voltage (V_R): 5 V
• Output Collector-Emitter Voltage (V_CEO): 70 V
• Output Emitter-Collector Voltage (V_ECO): 7 V
• Total Power Dissipation (P_tot): 150 mW
• Isolation Voltage (V_ISO): 5300 V_RMS

Recommended Operating Conditions

• Input Forward Current (I_F): 10 mA (typical), 20 mA (maximum)
• Output Collector Current (I_C): 50 mA (maximum)
• Operating Temperature Range (T_A): -55°C to +100°C
• Storage Temperature Range (T_stg): -55°C to +125°C

Optoelectronic Characteristics

• Current Transfer Ratio (CTR): 50% to 600% (at I_F = 10 mA, V_CE = 5 V)
• Response Time (t_r): 3 µs (typical)
• Fall Time (t_f): 2 µs (typical)
• Coupling Capacitance (C_IO): 0.6 pF (typical)

Package Information

The SFH610AX is available in a standard 4-pin Dual In-line Package (DIP-4). The package is designed for through-hole mounting and provides excellent mechanical and thermal stability. Below are the key dimensions and specifications:

• Package Type: Plastic DIP-4
• Pin Configuration:
  • Pin 1: Anode
  • Pin 2: Cathode
  • Pin 3: Emitter
  • Pin 4: Collector
• Package Dimensions:
  • Length: 6.35 mm
  • Width: 4.57 mm
  • Height: 3.81 mm
  • Lead Pitch: 2.54 mm
• Weight: Approximately 0.25 grams

Conclusion

The SFH610AX optocoupler is a reliable and high-performance component designed for applications requiring electrical isolation and efficient signal transmission. With its high current transfer ratio, low coupling capacitance, and robust isolation voltage, it is well-suited for industrial, medical, telecommunications, and automotive applications. The compact DIP-4 package ensures easy integration into a wide range of circuit designs, making the SFH610AX a versatile choice for engineers and designers.