IS201 Optoisolator Transistor Output - Equivalent & Substitute Parts

Part Overview

The IS201 is a 6-pin optoisolator with transistor output manufactured by Isocom Components 2004 LTD. It provides galvanic isolation up to 7.5Vpk with a single channel configuration suitable for DC input applications. The device is currently in active production status with 8925 units in stock.

Finding equivalent and substitute parts becomes necessary when the IS201 reaches end-of-life status, when supply constraints occur, or when design requirements call for enhanced isolation voltage ratings or extended temperature operating ranges. The SFH600-2 represents a viable alternative with higher isolation voltage capability, though it carries a Last Time Buy status indicating limited future availability.

Substiute Parts

IS201

Isocom Components 2004 LTDIn Stock: 9023IS201 Datasheet

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SFH600-2

Vishay Semiconductor Opto DivisionIn Stock: 3664SFH600-2 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the IS201 is determined by the following critical parameters:

• Package Compatibility: Both parts must use 6-DIP (0.300", 7.62mm) through-hole mounting to ensure direct PCB compatibility without layout modifications.
• Output Configuration: The IS201 features transistor output; substitutes must maintain the same output type to preserve circuit functionality.
• Electrical Performance: Maximum output voltage (70V) and output current per channel (50mA) must be met or exceeded.
• Isolation Voltage: The substitute must provide isolation voltage equal to or greater than the original specification.
• Saturation Voltage: Vce saturation must not exceed 400mV to maintain switching performance characteristics.
• Operating Temperature Range: The substitute must cover the required temperature envelope or provide an extended range.
• Compliance Standards: RoHS3 compliance and REACH unaffected status ensure regulatory alignment.

The SFH600-2 qualifies as a substitute based on these criteria: it maintains 6-DIP packaging, transistor output configuration, 70V maximum output voltage, 50mA output current, 400mV saturation voltage, and ROHS3 compliance. The SFH600-2 provides enhanced isolation voltage (5300Vrms versus 7.5Vpk) and extended operating temperature range (-55°C to 100°C).

Parameter Comparison

Engineering Selection Recommendations

IS201 (Primary Selection)

The IS201 remains the preferred choice for new designs and ongoing production. It maintains active product status with 8925 units currently in stock, ensuring supply continuity. Full ROHS3 compliance and REACH unaffected status satisfy regulatory requirements. The device is suitable for applications requiring isolation voltage of 7.5Vpk or higher and operating temperatures between -25°C and 100°C.

SFH600-2 (Alternative Selection)

The SFH600-2 is suitable as a substitute when the IS201 becomes unavailable or when design specifications require enhanced isolation voltage (5300Vrms) or extended low-temperature operation (-55°C). The SFH600-2 carries Last Time Buy status, indicating limited future availability; therefore, it should be considered only for immediate replacement needs or legacy system maintenance. The addition of base output on the SFH600-2 provides enhanced circuit design flexibility compared to the standard transistor output of the IS201. Both devices maintain identical maximum output voltage (70V), output current (50mA), and saturation voltage (400mV) specifications, ensuring functional compatibility in most applications.

Frequently Asked Questions (FAQ)

Q: Can the SFH600-2 be used as a direct replacement for the IS201 in existing designs?

A: Yes, the SFH600-2 is pin-compatible and functionally compatible for most applications. Both devices use 6-DIP packaging with identical pinout, maximum output voltage (70V), and output current (50mA). The SFH600-2 provides higher isolation voltage and extended temperature range. The base output feature on the SFH600-2 is an additional capability that does not prevent its use in IS201 applications.

Q: What are the key differences between IS201 and SFH600-2?

A: The primary differences are isolation voltage rating (7.5Vpk versus 5300Vrms), operating temperature range (-25°C to 100°C versus -55°C to 100°C), current transfer ratio specifications (75% minimum versus 100-200%), and output configuration (transistor versus transistor with base). Both maintain identical maximum output voltage, output current, and saturation voltage.

Q: Is the SFH600-2 suitable for new product designs?

A: The SFH600-2 carries Last Time Buy status, indicating limited future availability. For new product designs requiring long-term supply assurance, the IS201 is the recommended choice due to its active production status.

Q: Are both parts RoHS3 compliant?

A: Yes, both the IS201 and SFH600-2 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: What is the significance of the base output on the SFH600-2?

A: The base output on the SFH600-2 provides direct access to the transistor base, enabling advanced circuit configurations such as active pull-up or pull-down control. The IS201 standard transistor output does not include this feature. For applications using only the collector and emitter, the base output does not affect functionality.