HCPL-3700-520 Equivalent & Substitute Parts

Part Overview

The HCPL-3700-520 is an optoisolator with Darlington output, rated for 5000Vrms isolation voltage, housed in an 8-DIP Gull Wing surface mount package. This component provides galvanic isolation for single-channel applications requiring high voltage isolation and AC/DC input compatibility. The main part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

HCPL-3700-520

Broadcom LimitedIn Stock: 748HCPL-3700-520 Datasheet

Current PartRFQ

HCPL-3700-520E

Broadcom LimitedIn Stock: 920HCPL-3700-520E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the HCPL-3700-520 is determined by strict equivalence across the following critical parameters:

• Isolation Voltage: 5000Vrms (mandatory match)
• Number of Channels: 1 (mandatory match)
• Output Type: Darlington (mandatory match)
• Package / Case: 8-SMD, Gull Wing (mandatory match)
• Voltage - Output (Max): 20V (mandatory match)
• Current - Output / Channel: 30mA (mandatory match)
• Input Type: AC, DC (mandatory match)
• Operating Temperature Range: -40°C ~ 85°C (mandatory match)

The HCPL-3700-520E meets all substitution criteria as a direct equivalent from the same manufacturer, with identical electrical and mechanical specifications. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The HCPL-3700-520E is the direct substitute for the HCPL-3700-520. Both components are manufactured by Broadcom Limited and share identical electrical and mechanical specifications. The HCPL-3700-520E is currently in active production status, ensuring long-term availability and supply chain continuity.

The HCPL-3700-520E offers improved compliance posture, meeting ROHS3 standards compared to the non-compliant status of the original part. For new designs or procurement requiring regulatory compliance, the HCPL-3700-520E is the appropriate selection. The packaging difference (Tape & Reel versus bulk) reflects standard distribution formats and does not affect component functionality or performance.

Frequently Asked Questions (FAQ)

Q: Can the HCPL-3700-520E be used as a direct replacement for the HCPL-3700-520?

A: Yes. The HCPL-3700-520E is electrically and mechanically identical to the HCPL-3700-520. All critical parameters—isolation voltage, output type, current rating, timing characteristics, and package configuration—are equivalent. No circuit modifications are required.

Q: What is the difference between the HCPL-3700-520 and HCPL-3700-520E?

A: The primary differences are product status and packaging format. The HCPL-3700-520 is discontinued; the HCPL-3700-520E is active. The HCPL-3700-520E is supplied in Tape & Reel format, while the original was available in bulk. The HCPL-3700-520E also meets ROHS3 compliance standards.

Q: Are there any compatibility concerns when switching to the HCPL-3700-520E?

A: No compatibility concerns exist. The 8-DIP Gull Wing surface mount package, electrical ratings, and performance characteristics are identical. PCB footprints and circuit designs require no modification.

Q: Why is the HCPL-3700-520 discontinued?

A: Product discontinuation is determined by manufacturer production decisions and market demand. The HCPL-3700-520E remains in active production as the current equivalent offering.

Q: What does ROHS3 compliance mean for the HCPL-3700-520E?

A: ROHS3 compliance indicates the component meets Restriction of Hazardous Substances Directive requirements, restricting specific hazardous materials in electrical and electronic equipment. This is relevant for applications subject to environmental and regulatory standards.