IS205 Optoisolator Transistor Output Equivalent & Substitute Parts

Part Overview

The IS205 is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This 6-pin DIP component provides galvanic isolation rated at 5300Vrms with a single channel transistor output configuration. The device is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Alternative part numbers become necessary when primary inventory is unavailable or when design flexibility across qualified manufacturers is required for supply chain resilience.

Substiute Parts

IS205

Isocom Components 2004 LTDIn Stock: 791IS205 Datasheet

Current PartRFQ

IS205X

Isocom Components 2004 LTDIn Stock: 1097IS205X Datasheet

Parametric EquivalentRFQ

CNY17F-3

Lite-On Inc.In Stock: 93367CNY17F-3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IS205 are classified into two categories based on parametric alignment:

Parametric Equivalent (IS205X): This part maintains identical electrical specifications across all critical isolation, switching, and output parameters. The IS205X is manufactured by the same supplier (Isocom Components 2004 LTD) within the same product series. Substitution is valid when inventory constraints require an alternative part number without design modification.

Similar Substitute (CNY17F-3): This part from Lite-On Inc. shares the same package format (6-DIP), single-channel transistor output topology, and core isolation voltage class. However, it exhibits measurable differences in isolation voltage (5000Vrms vs. 5300Vrms), output voltage rating (70V vs. 30V), output current capability (150mA vs. 50mA), switching speed (5µs vs. 2µs rise/fall time), and saturation voltage (300mV vs. 400mV). Substitution requires verification that the application tolerates these parameter variations.

Parameter Comparison

Engineering Selection Recommendations

IS205X Selection: Use IS205X as the primary substitute when the IS205 is unavailable. Both parts carry Active product status, ROHS3 compliance, and identical electrical specifications. No circuit redesign or application re-qualification is required. This substitution is suitable for all applications currently using IS205.

CNY17F-3 Selection: Use CNY17F-3 only when application requirements accommodate the parameter differences listed in the comparison table. The CNY17F-3 offers superior output current capability (150mA vs. 50mA) and lower saturation voltage (300mV vs. 400mV), making it suitable for applications requiring higher drive capability. However, the reduced isolation voltage (5000Vrms vs. 5300Vrms) and slower switching speed (5µs vs. 2µs) must be evaluated against circuit timing and isolation margin requirements. Both parts maintain Active status and full RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can IS205X be used as a direct replacement for IS205? A: Yes. IS205X is a parametric equivalent with identical electrical specifications, package format, and compliance certifications. No design changes are required.

Q: What are the key differences between IS205 and CNY17F-3? A: The CNY17F-3 has lower isolation voltage (5000Vrms vs. 5300Vrms), higher output voltage rating (70V vs. 30V), higher output current (150mA vs. 50mA), slower switching speed (5µs vs. 2µs), and lower saturation voltage (300mV vs. 400mV). These differences must be evaluated for circuit compatibility.

Q: Is the 6-DIP package identical across all three parts? A: Yes. All three parts use the same 6-DIP (0.300", 7.62mm) package format and are pin-compatible at the mechanical level.

Q: Are all three parts RoHS3 compliant? A: Yes. IS205, IS205X, and CNY17F-3 all carry ROHS3 compliance certification.

Q: Which part should I select if isolation voltage is critical to my application? A: IS205 or IS205X provide 5300Vrms isolation. CNY17F-3 provides 5000Vrms isolation. Select based on your application's minimum isolation voltage requirement.

Q: Can CNY17F-3 replace IS205 in high-speed switching applications? A: CNY17F-3 has slower rise and fall times (5µs vs. 2µs). Applications requiring faster switching response should use IS205 or IS205X.