SFH600 Optocoupler Technical Summary

Overview

The SFH600 is a high-performance optocoupler featuring a GaAs (Gallium Arsenide) LED emitter optically coupled with a silicon planar phototransistor. This component is designed to provide reliable signal isolation while maintaining excellent electrical characteristics. The SFH600 series is particularly noted for its high current transfer ratios (CTR) and robust isolation capabilities, making it suitable for demanding industrial and commercial applications.

With its premium quality construction and long-term stability, the SFH600 ensures consistent performance over extended periods. The device operates across a wide temperature range and offers excellent noise immunity, making it ideal for use in electrically noisy environments.

Key Features

• High Current Transfer Ratios (CTR):
  • SFH600-0: 40% to 80%
  • SFH600-1: 63% to 125%
  • SFH600-2: 100% to 200%
  • SFH600-3: 160% to 320%
• Excellent Isolation Characteristics: 5300 V_ACRMS isolation test voltage for 1 second
• Low Saturation Voltage: V_CEsat of 0.25V (max 0.4V) at I_F=10mA, I_C=2.5mA
• Premium Quality Construction: Designed for reliability and long-term performance
• Wide Temperature Range: Suitable for operation in various environmental conditions
• Long-Term Stability: Maintains consistent performance over time
• Extended Storage Capability: Storage temperature range from -55°C

Applications

The SFH600 optocoupler is designed for a wide range of applications requiring signal isolation and noise immunity:

• Industrial Control Systems: PLCs, motor controls, and automation equipment
• Power Supply Regulation: Feedback circuits in switched-mode power supplies
• Medical Equipment: Patient-isolated monitoring systems
• Telecommunications: Signal isolation in communication interfaces
• Automotive Electronics: Noise-sensitive control circuits
• Test and Measurement Equipment: Isolated signal acquisition
• Consumer Electronics: Appliances requiring reliable isolation

Electrical Characteristics

Absolute Maximum Ratings

• Collector-Emitter Voltage: 70V
• Emitter-Collector Voltage: 7V
• Collector Current: 50mA
• LED Forward Current: 60mA
• Total Power Dissipation: 150mW
• Isolation Voltage: 5300V_ACRMS
• Operating Temperature Range: -55°C to +100°C
• Storage Temperature Range: -55°C to +125°C

Optical Characteristics

• LED Forward Voltage (Typical): 1.15V at I_F=10mA
• LED Reverse Current: ≤10μA at V_R=3V
• Current Transfer Ratio (CTR): As specified per variant (see Features section)
• Response Time (Turn-on): 3μs typical
• Response Time (Turn-off): 4μs typical

Switching Characteristics

• Rise Time (t_r): 3μs typical
• Fall Time (t_f): 4μs typical
• Propagation Delay Time (t_PHL): 3μs typical
• Propagation Delay Time (t_PLH): 4μs typical

Package Information

The SFH600 is available in a standard 6-pin DIP (Dual In-line Package) configuration:

• Package Type: DIP-6
• Mounting: Through-hole
• Pin Spacing: 2.54mm (standard DIP pitch)
• Package Material: Black plastic, UL 94 V-0 rated
• Lead Material: Tin-plated copper alloy
• Weight: Approximately 0.35g

Pin Configuration

• Pin 1: Anode of LED
• Pin 2: Cathode of LED
• Pin 3: No Connection
• Pin 4: Emitter of Phototransistor
• Pin 5: Collector of Phototransistor
• Pin 6: No Connection

Reliability and Safety

The SFH600 optocoupler meets stringent quality and safety standards:

• UL Recognized (File E52744)
• CSA Certified
• IEC/EN/DIN EN 60747-5-2 compliant
• RoHS compliant
• Flammability rating UL 94 V-0

Design Considerations

When implementing the SFH600 in circuit designs, consider the following:

• Proper current limiting for the LED is essential for long-term reliability
• The CTR varies with temperature - consult derating curves for critical applications
• For high-speed applications, consider the propagation delay characteristics
• Maintain proper creepage and clearance distances for high-voltage isolation
• Consider using a snubber circuit for inductive loads

Environmental Characteristics

• Moisture Sensitivity Level (MSL): 1 (unlimited floor life at ≤30°C/85%RH)
• ESD Sensitivity: HBM Class 1B (500V to <1000V)
• Flammability Rating: UL 94 V-0
• Lead-free and RoHS compliant

Ordering Information

The SFH600 is available in several variants differentiated by CTR range:

• SFH600-0: CTR 40-80%
• SFH600-1: CTR 63-125%
• SFH600-2: CTR 100-200%
• SFH600-3: CTR 160-320%

Standard packaging options include tubes, trays, and tape-and-reel for automated assembly.