HCPL-4701 Equivalent & Substitute Parts

Part Overview

The HCPL-4701 is an optoisolator with Darlington output configuration, designed for high-voltage isolation applications. Manufactured by Broadcom Limited, this component provides 3750Vrms isolation in a standard 8-DIP through-hole package. The part is currently active in production with 1900 units in stock. Alternative equivalent and substitute parts are available to support procurement flexibility, inventory management, and application-specific requirements where electrical and mechanical parameters align with the original specification.

Substiute Parts

HCPL-4701

Broadcom LimitedIn Stock: 1950HCPL-4701 Datasheet

Current PartRFQ

HCPL-4701-000E

Broadcom LimitedIn Stock: 5791HCPL-4701-000E Datasheet

Parametric EquivalentRFQ

6N139M

onsemiIn Stock: 211196N139M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HCPL-4701 are classified based on electrical and mechanical compatibility within the optoisolator Darlington category. The substitution logic is determined by the following critical parameters:

Mechanical Compatibility: All substitute parts must use the 8-DIP (0.300", 7.62mm) through-hole package to ensure direct socket compatibility.

Electrical Compatibility: Substitute parts must maintain the Darlington with Base output configuration and support the same maximum output voltage (18V) and current per channel (60mA).

Isolation Voltage: The HCPL-4701 specifies 3750Vrms isolation. Substitute parts with equal or higher isolation voltage ratings are electrically compatible for this application.

Input/Output Characteristics: All substitutes must accept DC input and provide Darlington output with base connection.

Current Transfer Ratio: Substitute parts must demonstrate adequate current transfer ratio performance to support the intended switching and signal isolation function.

Parameter Comparison

Engineering Selection Recommendations

HCPL-4701-000E (Broadcom Limited): This part is a parametric equivalent to the HCPL-4701, offering identical electrical specifications and package configuration. The primary distinction is RoHS3 compliance status. Selection of HCPL-4701-000E is appropriate for applications requiring RoHS3 compliance or when higher inventory availability (5700 units) is advantageous for supply chain planning.

6N139M (onsemi): This part provides higher isolation voltage (5000Vrms versus 3750Vrms) and extended operating temperature range (-40°C to 100°C versus 0°C to 70°C). The 6N139M maintains mechanical and functional compatibility through identical package, output type, and maximum output specifications. This substitute is suitable for applications requiring enhanced isolation margin, wider temperature operation, or RoHS3 compliance. The significantly higher inventory level (21055 units) supports extended procurement windows.

Frequently Asked Questions (FAQ)

Q: Can HCPL-4701-000E be used as a direct replacement for HCPL-4701?

A: Yes. HCPL-4701-000E is a parametric equivalent with identical isolation voltage, current transfer ratio, output voltage, output current, and package configuration. Both parts are manufactured by Broadcom Limited and are pin-compatible in 8-DIP through-hole applications.

Q: What are the key differences between HCPL-4701 and 6N139M?

A: The 6N139M offers higher isolation voltage (5000Vrms versus 3750Vrms) and wider operating temperature range (-40°C to 100°C versus 0°C to 70°C). Both parts share identical package, output type, maximum output voltage, and output current specifications. The 6N139M is manufactured by onsemi rather than Broadcom Limited.

Q: Is the 6N139M pin-compatible with HCPL-4701?

A: Yes. Both parts use the 8-DIP (0.300", 7.62mm) through-hole package with identical pin assignments for Darlington output optoisolators. Direct socket substitution is supported.

Q: Which substitute part should be selected for RoHS3 compliance?

A: Both HCPL-4701-000E and 6N139M carry ROHS3 Compliant status. The original HCPL-4701 is RoHS non-compliant. Selection between the two compliant alternatives depends on isolation voltage requirements and operating temperature range.

Q: Are there differences in current transfer ratio between these parts?

A: The HCPL-4701 and HCPL-4701-000E specify 600% minimum CTR at 500µA input. The 6N139M specifies 500% minimum CTR at 1.6mA input. All three parts meet the functional requirement for Darlington output signal isolation. Input current requirements differ slightly between the Broadcom and onsemi designs.

Q: What is the significance of the higher isolation voltage in 6N139M?

A: The 6N139M provides 5000Vrms isolation compared to 3750Vrms in HCPL-4701. This higher rating offers additional safety margin in high-voltage isolation applications and supports use in more demanding electrical environments without redesign.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes, all three parts are mechanically and functionally compatible for through-hole PCB designs using 8-DIP sockets. No PCB layout modifications are required for substitution.