IS202 Optoisolator Transistor Output Equivalent & Substitute Parts

Part Overview

The IS202 is a 6-pin high-density transistor output optoisolator manufactured by Isocom Components 2004 LTD. This component provides galvanic isolation with a single channel, transistor output configuration, and is designed for applications requiring DC input switching with isolated transistor output control. The IS202 is currently in active production status with 1945 units available in stock.

Substitute parts become necessary when the IS202 reaches end-of-life status, when supply constraints occur, or when design requirements necessitate enhanced isolation voltage ratings or extended operating temperature ranges. The SFH600-3 represents a viable alternative with comparable electrical characteristics and identical mechanical packaging.

Substiute Parts

IS202

Isocom Components 2004 LTDIn Stock: 2021IS202 Datasheet

Current PartRFQ

SFH600-3

Vishay Semiconductor Opto DivisionIn Stock: 1651SFH600-3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IS202 is determined by strict alignment with the following critical parameters:

• Package / Case: Must be 6-DIP (0.300", 7.62mm) for mechanical compatibility
• Number of Channels: Must be 1 channel
• Output Type: Must be Transistor or Transistor with Base
• Voltage - Output (Max): Must be ≥70V
• Current - Output / Channel: Must be ≥50mA
• Vce Saturation (Max): Must be ≤400mV
• Input Type: Must be DC
• RoHS Status: Must be ROHS3 Compliant
• Mounting Type: Must be Through Hole

The SFH600-3 meets all substitution criteria. While it features a higher isolation voltage rating (5300Vrms versus 7.5Vpk) and an extended operating temperature range (-55°C to 100°C versus -25°C to 100°C), these represent enhancements rather than deviations from the IS202 specification. The SFH600-3 includes a base connection on the transistor output, providing additional design flexibility.

Parameter Comparison

Engineering Selection Recommendations

For Active Production and New Designs: The IS202 is the primary selection. It maintains active product status with 1945 units in current inventory, ensuring supply continuity and long-term availability for production volumes.

For Replacement and End-of-Life Scenarios: The SFH600-3 is a qualified substitute. Both components are ROHS3 compliant and carry identical MSL ratings. The SFH600-3 is currently in Last Time Buy status, indicating limited future availability. Selection of the SFH600-3 should be reserved for applications where the enhanced isolation voltage (5300Vrms) or extended low-temperature operating range (-55°C) provides design advantages over the IS202.

Compliance Considerations: Both parts carry identical REACH Unaffected and EAR99 ECCN classifications, ensuring equivalent regulatory compliance for export and supply chain purposes.

Frequently Asked Questions (FAQ)

Q: Can the SFH600-3 be used as a direct replacement for the IS202 in existing designs?

A: The SFH600-3 is mechanically and electrically compatible with the IS202 in terms of package, pin count, output voltage, output current, and saturation characteristics. However, the SFH600-3 includes a base connection on the transistor output, which the IS202 does not provide. PCB layouts and schematic designs must be reviewed to ensure the additional base pin does not create conflicts. If the base pin is left unconnected, the SFH600-3 functions as a standard transistor output optoisolator.

Q: What is the significance of the isolation voltage difference between the IS202 (7.5Vpk) and SFH600-3 (5300Vrms)?

A: The isolation voltage specification defines the maximum voltage that can be safely applied between the input and output sides of the optoisolator without risk of electrical breakdown. The SFH600-3 provides substantially higher isolation capability (5300Vrms) compared to the IS202 (7.5Vpk). This difference reflects different measurement standards and does not indicate incompatibility. The SFH600-3 is suitable for applications requiring either isolation voltage level.

Q: Are there pin-to-pin compatibility concerns between the IS202 and SFH600-3?

A: Both components use the 6-DIP (0.300", 7.62mm) package with identical mechanical dimensions. Pin assignments must be verified against individual datasheets, as the SFH600-3 includes a base pin that the IS202 does not. Standard 6-DIP sockets and through-hole PCB footprints are compatible with both parts.

Q: Why is the SFH600-3 listed as Last Time Buy?

A: Last Time Buy status indicates that the manufacturer (Vishay Semiconductor Opto Division) has announced the end of production for this component. Existing inventory may be available from authorized distributors, but future procurement cannot be guaranteed. For new designs requiring long-term supply assurance, the IS202 is the recommended selection.

Q: What are the implications of the different operating temperature ranges?

A: The IS202 operates from -25°C to 100°C, while the SFH600-3 operates from -55°C to 100°C. The SFH600-3 provides extended low-temperature capability, making it suitable for applications in cold environments or equipment requiring broader thermal performance. For standard industrial applications within the -25°C to 100°C range, both components are equivalent.