SFH601-4 Equivalent & Substitute Parts

Part Overview

The SFH601-4 is an optoisolator transistor with base output manufactured by Vishay Semiconductor Opto Division. This component provides 5300Vrms isolation in a 6-DIP package and is designed for applications requiring galvanic isolation with transistor output capability. The SFH601-4 is currently listed as obsolete, making identification of active equivalent parts essential for ongoing production and maintenance applications.

Substiute Parts

SFH601-4

Vishay Semiconductor Opto DivisionIn Stock: 1560SFH601-4 Datasheet

Current PartRFQ

CNY17-4

Lite-On Inc.In Stock: 89867CNY17-4 Datasheet

MFR RecommendedRFQ

SFH601-1

Vishay Semiconductor Opto DivisionIn Stock: 16407SFH601-1 Datasheet

MFR RecommendedRFQ

SFH601-2

Vishay Semiconductor Opto DivisionIn Stock: 16696SFH601-2 Datasheet

MFR RecommendedRFQ

SFH601-3

Vishay Semiconductor Opto DivisionIn Stock: 5213SFH601-3 Datasheet

MFR RecommendedRFQ

SFH601-4

Vishay Semiconductor Opto DivisionIn Stock: 1560SFH601-4 Datasheet

MFR RecommendedRFQ

SFH601-5

Isocom Components 2004 LTDIn Stock: 1862SFH601-5 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SFH601-4 is determined by the following critical parameters:

• Package compatibility: 6-DIP (0.300", 7.62mm) form factor
• Isolation voltage: Minimum 5000Vrms required
• Output type: Transistor with base configuration
• Current transfer ratio: Minimum 160% @ 10mA
• Maximum output voltage: 100V or greater
• Operating temperature range: -55°C to 100°C
• Input type: DC
• Compliance: ROHS3 compliant, MSL 1

Substitute parts are grouped into two categories based on isolation voltage specification:

Category A - Equivalent Isolation (5300Vrms): SFH601-1, SFH601-2, SFH601-3, SFH601-4 These parts maintain the same isolation voltage as the main part and differ only in current transfer ratio specifications.

Category B - Reduced Isolation (5000Vrms): CNY17-4 This part operates at 5000Vrms isolation, which is 300Vrms lower than the SFH601-4 but remains within acceptable substitution parameters for applications not requiring the full 5300Vrms rating.

Category C - Enhanced Isolation (7500Vpk): SFH601-5 This part provides higher isolation voltage (7500Vpk) and is suitable for applications requiring greater isolation margin.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Recommended)

SFH601-2 and SFH601-3 are active Vishay products maintaining the same 5300Vrms isolation voltage and 6-DIP package as the SFH601-4. Both are ROHS3 compliant with MSL 1 rating. SFH601-2 provides 63-125% current transfer ratio, while SFH601-3 provides 100-200% current transfer ratio. Selection between these depends on the required current transfer ratio range for your application.

Secondary Substitute (Reduced Isolation)

CNY17-4 from Lite-On Inc. is an active product with 5000Vrms isolation (300Vrms lower than SFH601-4). It matches the current transfer ratio range (160-320% @ 10mA) and provides higher output current capability (150mA vs. 50mA). This part is suitable for applications where 5000Vrms isolation is acceptable and higher output current is beneficial. ROHS3 compliant with MSL 1 rating.

Enhanced Isolation Option

SFH601-5 from Isocom Components provides 7500Vpk isolation with active product status. This part is suitable for applications requiring greater isolation margin than the SFH601-4. ROHS3 compliant with MSL 1 rating. Note that turn-on/turn-off times and rise/fall times are slower than the SFH601-4.

Compliance Considerations

All substitute parts maintain ROHS3 compliance and MSL 1 (unlimited moisture sensitivity) ratings, ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can SFH601-3 directly replace SFH601-4 in my circuit?

A: SFH601-3 is mechanically and electrically compatible with SFH601-4. Both use the 6-DIP package, operate at -55°C to 100°C, and provide 5300Vrms isolation. The primary difference is the current transfer ratio range: SFH601-3 provides 100-200% @ 10mA versus SFH601-4's 160-320% @ 10mA. Substitution is valid if your circuit design accommodates the lower current transfer ratio range of SFH601-3.

Q: What is the difference between SFH601-2 and SFH601-3?

A: Both parts are Vishay products with 5300Vrms isolation and identical timing characteristics. SFH601-2 provides 63-125% current transfer ratio @ 10mA, while SFH601-3 provides 100-200% @ 10mA. Selection depends on whether your application requires the higher current transfer ratio range of SFH601-3 or can operate with the lower range of SFH601-2.

Q: Is CNY17-4 a suitable replacement for SFH601-4?

A: CNY17-4 is suitable if your application can operate at 5000Vrms isolation instead of 5300Vrms. It matches the current transfer ratio range (160-320% @ 10mA) and provides higher output current (150mA vs. 50mA). The 6-DIP package, operating temperature range, and compliance ratings are identical. Applications requiring the full 5300Vrms isolation should use SFH601-2 or SFH601-3 instead.

Q: What are the timing differences between SFH601-4 and CNY17-4?

A: SFH601-4 has turn-on/turn-off times of 3µs and 2.3µs with rise/fall times of 2µs and 2µs. CNY17-4 has slower timing with rise/fall times of 5µs and 5µs. Turn-on/turn-off times are not specified for CNY17-4. Applications with strict timing requirements should use SFH601-2 or SFH601-3 to maintain identical timing characteristics.

Q: Can I use SFH601-5 as a drop-in replacement?

A: SFH601-5 is mechanically compatible (6-DIP package) and operates within the same temperature range. However, it provides higher isolation voltage (7500Vpk) and has significantly slower timing characteristics (6µs turn-on, 25µs turn-off, 4.6µs and 15µs rise/fall times). Use SFH601-5 only if your application requires the enhanced isolation voltage and can accommodate the slower switching times.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. SFH601-1, SFH601-2, SFH601-3, SFH601-4, CNY17-4, and SFH601-5 are all ROHS3 compliant with MSL 1 (unlimited) moisture sensitivity level, ensuring compatibility with standard manufacturing and storage protocols.