HCPL2730S Equivalent & Substitute Parts

Part Overview

The HCPL2730S is a 2-channel optoisolator with Darlington output manufactured by onsemi, rated for 2500Vrms isolation voltage. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The HCPL2730S operates as a DC input optoisolator with dual Darlington outputs, suitable for applications requiring galvanic isolation in industrial and power management circuits.

Substiute Parts

HCPL2730S

onsemiIn Stock: 2266HCPL2730S Datasheet

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HCPL-2730-320E

Broadcom LimitedIn Stock: 5830HCPL-2730-320E Datasheet

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HCPL-273L-500E

Broadcom LimitedIn Stock: 781HCPL-273L-500E Datasheet

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HCPL-4731#300

Broadcom LimitedIn Stock: 1135HCPL-4731#300 Datasheet

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HCPL-4731-300E

Broadcom LimitedIn Stock: 2481HCPL-4731-300E Datasheet

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HCPL-4731-320E

Broadcom LimitedIn Stock: 875HCPL-4731-320E Datasheet

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HCPL-4731-500E

Broadcom LimitedIn Stock: 1110HCPL-4731-500E Datasheet

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HCPL-4731-520E

Broadcom LimitedIn Stock: 1088HCPL-4731-520E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the HCPL2730S is determined by the following critical parameters:

• Number of Channels: Must be 2 channels
• Output Type: Must be Darlington output
• Voltage - Isolation: Minimum 2500Vrms (equal or higher acceptable)
• Current Transfer Ratio (Min): Minimum 300% @ 1.6mA (equal or higher acceptable)
• Voltage - Output (Max): Maximum 7V (equal or higher acceptable)
• Current - Output / Channel: Minimum 60mA (equal or higher acceptable)
• Input Type: Must be DC
• Package / Case: 8-SMD, Gull Wing format

Substitute parts are grouped into two categories based on isolation voltage rating and current transfer ratio specifications:

Group 1 - Enhanced Isolation (5000Vrms): HCPL-2730-320E, HCPL-4731-320E, HCPL-4731-520E

Group 2 - Standard Isolation (3750Vrms): HCPL-273L-500E, HCPL-4731#300, HCPL-4731-300E, HCPL-4731-500E

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed meet the core functional requirements of the HCPL2730S: 2-channel Darlington output optoisolators with 8-SMD Gull Wing packaging and DC input operation.

For RoHS3 Compliant Applications: HCPL-2730-320E, HCPL-273L-500E, HCPL-4731-300E, HCPL-4731-320E, HCPL-4731-500E, and HCPL-4731-520E are all ROHS3 compliant. HCPL-4731#300 is RoHS non-compliant and should not be selected for applications requiring RoHS compliance.

For Extended Temperature Range: The HCPL2730S operates from -40°C to 85°C. All substitute parts operate within 0°C to 70°C, representing a narrower temperature range. Applications requiring operation below 0°C or above 70°C cannot use these substitutes.

For Enhanced Isolation Voltage: HCPL-2730-320E, HCPL-4731-320E, and HCPL-4731-520E provide 5000Vrms isolation, exceeding the HCPL2730S specification of 2500Vrms. These are suitable for applications requiring higher isolation margins.

For Standard Isolation Voltage: HCPL-273L-500E, HCPL-4731#300, HCPL-4731-300E, and HCPL-4731-500E provide 3750Vrms isolation, which exceeds the minimum 2500Vrms requirement.

For Higher Output Voltage Capability: HCPL-4731 series parts (HCPL-4731#300, HCPL-4731-300E, HCPL-4731-320E, HCPL-4731-500E, HCPL-4731-520E) support 18V maximum output voltage compared to 7V for the HCPL2730S and HCPL-2730-320E. This provides additional design flexibility for higher voltage switching applications.

Frequently Asked Questions (FAQ)

Q: Can HCPL-4731 series parts directly replace HCPL2730S?

A: HCPL-4731 series parts meet all core substitution criteria: 2 channels, Darlington output, 8-SMD Gull Wing package, and DC input. However, they feature higher maximum output voltage (18V vs 7V) and different current transfer ratio specifications (600% @ 500µA vs 300% @ 1.6mA). Circuit design must account for these parameter differences.

Q: What is the difference between HCPL-2730-320E and HCPL-273L-500E?

A: Both are 2-channel Darlington optoisolators in 8-SMD Gull Wing packages. HCPL-2730-320E provides 5000Vrms isolation with 300% CTR @ 1.6mA and 12mA maximum forward current. HCPL-273L-500E provides 3750Vrms isolation with 300% CTR @ 1.6mA and 20mA maximum forward current. Selection depends on isolation voltage requirements and input LED current budget.

Q: Are all substitute parts ROHS3 compliant?

A: No. HCPL-4731#300 is RoHS non-compliant. All other listed substitutes (HCPL-2730-320E, HCPL-273L-500E, HCPL-4731-300E, HCPL-4731-320E, HCPL-4731-500E, HCPL-4731-520E) are ROHS3 compliant.

Q: What is the operating temperature limitation when substituting?

A: The HCPL2730S operates from -40°C to 85°C. All substitute parts operate within 0°C to 70°C. Applications requiring operation outside this range cannot use these substitutes.

Q: Can I use HCPL-4731-520E in place of HCPL2730S?

A: HCPL-4731-520E meets all core functional requirements and is ROHS3 compliant. It provides 5000Vrms isolation (exceeding the 2500Vrms requirement) and 18V maximum output voltage. The primary consideration is the narrower operating temperature range (0°C to 70°C vs -40°C to 85°C).

Q: What packaging formats are available for substitutes?

A: All substitute parts use 8-SMD Gull Wing package format, matching the HCPL2730S. Packaging options differ by part number: some are supplied in Tube format, others in Tape & Reel (TR) format. Verify packaging availability with your supplier for production requirements.