HCPL-2731#500 Equivalent & Substitute Parts

Part Overview

The HCPL-2731#500 is a 2-channel optoisolator with Darlington output, rated for 3750Vrms isolation voltage. Manufactured by Broadcom Limited, this component operates in the 0°C to 70°C temperature range and delivers 60mA per channel output current. The part is currently active in production status with 1076 units in stock.

Substitute parts are necessary when the original HCPL-2731#500 becomes unavailable, when alternative compliance certifications are required, or when operating temperature ranges or packaging formats differ from application requirements.

Substiute Parts

HCPL-2731#500

Broadcom LimitedIn Stock: 1154HCPL-2731#500 Datasheet

Current PartRFQ

HCPL2731S

onsemiIn Stock: 1131HCPL2731S Datasheet

MFR RecommendedRFQ

HCPL2731SD

onsemiIn Stock: 3156HCPL2731SD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HCPL-2731#500 is determined by the following critical parameters:

• Number of Channels: Must remain 2 channels
• Output Type: Must be Darlington configuration
• Voltage - Output (Max): Must support 18V maximum
• Current - Output / Channel: Must deliver 60mA per channel
• Package / Case: Must be 8-SMD, Gull Wing format
• Input Type: Must be DC input

The substitute parts HCPL2731S and HCPL2731SD share the same base product number (HCPL2731) and maintain identical channel count, output type, maximum output voltage, and output current specifications. Both are manufactured by onsemi and use the same 8-SMD Gull Wing package.

The primary differences between the main part and substitutes are isolation voltage rating (3750Vrms vs. 2500Vrms), operating temperature range, product status, and RoHS compliance certification.

Parameter Comparison

Engineering Selection Recommendations

HCPL2731S and HCPL2731SD are functionally equivalent substitutes for applications where isolation voltage requirements do not exceed 2500Vrms. Both substitute parts are ROHS3 compliant, whereas the main part is RoHS non-compliant. This compliance difference is significant for applications subject to RoHS regulations.

Both substitute parts support extended operating temperature ranges (-40°C to 85°C) compared to the main part (0°C to 70°C), making them suitable for wider environmental conditions.

The substitute parts exhibit faster turn-on and turn-off times (300ns vs. 5µs turn-on) and higher maximum DC forward current (20mA vs. 12mA), providing improved switching performance characteristics.

HCPL2731SD is available in Cut Tape and Digi-Reel packaging, whereas HCPL2731S packaging format is not specified. The main part is supplied in Tape & Reel format.

Selection between HCPL2731S and HCPL2731SD depends on packaging requirements and supply chain availability. Both parts are marked as obsolete, indicating limited future availability.

Frequently Asked Questions (FAQ)

Q: Can HCPL2731S or HCPL2731SD be used as direct replacements for HCPL-2731#500?

A: Both parts maintain identical channel count, output type, maximum output voltage, and output current specifications. Substitution is valid when the application isolation voltage requirement does not exceed 2500Vrms. The lower isolation rating of the substitute parts must be evaluated against circuit design specifications.

Q: What is the primary difference in isolation voltage between the main part and substitutes?

A: The HCPL-2731#500 provides 3750Vrms isolation, while HCPL2731S and HCPL2731SD provide 2500Vrms isolation. Applications requiring higher isolation voltage must use the main part or alternative components rated for 3750Vrms or higher.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both HCPL2731S and HCPL2731SD are ROHS3 compliant. The main part HCPL-2731#500 is RoHS non-compliant. This difference is critical for applications subject to RoHS regulations or customer requirements.

Q: What are the operating temperature differences?

A: The main part operates from 0°C to 70°C. Both substitute parts operate from -40°C to 85°C, providing a wider temperature operating range suitable for industrial and extended-temperature applications.

Q: Do the substitute parts have different switching characteristics?

A: Yes. The substitute parts exhibit faster turn-on time (300ns vs. 5µs) and faster turn-off time (5µs vs. 10µs) compared to the main part. The substitute parts also support higher maximum DC forward current (20mA vs. 12mA).

Q: What packaging options are available for the substitute parts?

A: HCPL2731SD is available in Cut Tape (CT) and Digi-Reel packaging. HCPL2731S packaging format is not specified. The main part is supplied in Tape & Reel (TR) format. Packaging selection depends on assembly equipment compatibility and supply requirements.

Q: Are both substitute parts still in production?

A: Both HCPL2731S and HCPL2731SD are marked as obsolete, indicating they are no longer in active production. Availability may be limited to existing inventory. The main part HCPL-2731#500 is currently active in production.