SFH620A-3 Equivalent & Substitute Parts

Part Overview

The SFH620A-3 is a single-channel optoisolator with transistor output, designed for AC and DC input applications requiring galvanic isolation up to 7.5Vpk. This 4-DIP through-hole component provides 50mA output current capability with a current transfer ratio range of 100% to 320% at 10mA input. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating, making it suitable for industrial and consumer electronics applications where isolation between input and output circuits is required.

Substitute parts are identified to address inventory availability, supply chain continuity, or specific application requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

SFH620A-3

Isocom Components 2004 LTDIn Stock: 32353SFH620A-3 Datasheet

Current PartRFQ

SFH620A-3X

Isocom Components 2004 LTDIn Stock: 1155SFH620A-3X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SFH620A-3 is determined by strict equivalence across the following critical parameters:

• Single-channel configuration
• 7.5Vpk isolation voltage
• Current transfer ratio range: 100% to 320% @ 10mA
• Transistor output type
• 70V maximum output voltage
• 50mA maximum output current per channel
• 400mV maximum Vce saturation
• 4-DIP through-hole package (0.300", 7.62mm)
• Operating temperature range: -30°C to 100°C
• Input type: AC and DC compatible

The SFH620A-3X meets all substitution criteria as a parametric equivalent from the same manufacturer and series, maintaining identical electrical specifications and package configuration.

Parameter Comparison

Engineering Selection Recommendations

Both the SFH620A-3 and SFH620A-3X are active production parts with identical ROHS3 compliance and REACH unaffected status. Selection between these parts is based on inventory availability and supply chain requirements rather than electrical or mechanical differences. The SFH620A-3 maintains higher inventory levels (32,319 pcs), while the SFH620A-3X provides an alternative source (1,141 pcs) from the same manufacturer. Both parts satisfy identical design requirements for single-channel optoisolation applications with 7.5Vpk isolation voltage and 50mA output current capability.

Frequently Asked Questions (FAQ)

Q: Can SFH620A-3X be used as a direct replacement for SFH620A-3?

A: Yes. The SFH620A-3X is a parametric equivalent with identical electrical specifications, current transfer ratio, output voltage and current ratings, saturation characteristics, operating temperature range, and 4-DIP package configuration. No circuit modifications are required.

Q: Are there any differences in isolation voltage between these parts?

A: No. Both parts provide 7.5Vpk isolation voltage, meeting the same galvanic isolation requirements.

Q: Do both parts support AC and DC input?

A: Yes. Both SFH620A-3 and SFH620A-3X accept AC and DC input signals with identical input characteristics.

Q: Are the packages mechanically identical?

A: Yes. Both parts use 4-DIP through-hole packages with 0.300" (7.62mm) spacing, allowing direct PCB footprint compatibility without layout modifications.

Q: What is the difference between these part numbers?

A: The suffix "X" in SFH620A-3X indicates a variant designation from the same manufacturer and series. Electrical and mechanical specifications remain identical to the SFH620A-3.

Q: Are both parts RoHS compliant?

A: Yes. Both SFH620A-3 and SFH620A-3X are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity).