HCPL-2730#300 Equivalent & Substitute Parts

Part Overview

The HCPL-2730#300 is a 2-channel optoisolator with Darlington output, rated for 3750Vrms isolation voltage. Manufactured by Broadcom Limited, this component is designed for applications requiring high-voltage isolation with dual-channel switching capability. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs.

Substiute Parts

HCPL-2730#300

Broadcom LimitedIn Stock: 1204HCPL-2730#300 Datasheet

Current PartRFQ

HCPL-2730-300E

Broadcom LimitedIn Stock: 1149HCPL-2730-300E Datasheet

DirectRFQ

HCPL2730S

Fairchild SemiconductorIn Stock: 2300HCPL2730S Datasheet

MFR RecommendedRFQ

HCPL2730SD

onsemiIn Stock: 4478HCPL2730SD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HCPL-2730#300 is determined by the following critical parameters:

• Number of Channels: Must be 2
• Output Type: Must be Darlington
• Package / Case: Must be 8-SMD, Gull Wing
• Voltage - Isolation: Minimum 2500Vrms (acceptable tolerance for high-voltage isolation applications)
• Current Transfer Ratio (Min): Minimum 300% @ 1.6mA
• Current - Output / Channel: Minimum 60mA
• Voltage - Output (Max): Maximum 7V
• Input Type: Must be DC

The substitute parts listed below meet these core electrical and mechanical requirements, enabling direct replacement in circuit designs.

Parameter Comparison

Engineering Selection Recommendations

HCPL-2730-300E (Broadcom Limited, Active Status)

This part is the direct successor to the HCPL-2730#300. It maintains identical electrical specifications including 3750Vrms isolation voltage, 300% minimum current transfer ratio, and 60mA output current per channel. The primary distinction is product status: HCPL-2730-300E is currently active and ROHS3 compliant, making it the preferred choice for new designs and ongoing production support. Packaging is supplied in tube format.

HCPL2730S (Fairchild Semiconductor, Active Status)

This alternative provides equivalent 2-channel Darlington output functionality with 2500Vrms isolation voltage. While isolation voltage is reduced compared to the original part, it remains within acceptable parameters for most applications. Operating temperature range extends to -40°C ~ 85°C, providing broader environmental coverage. Current transfer ratio and output specifications are identical. This part is actively manufactured and available in bulk packaging.

HCPL2730SD (onsemi, Obsolete Status)

This part matches the electrical specifications of HCPL2730S with 2500Vrms isolation voltage and identical channel, output type, and current characteristics. However, product status is listed as obsolete, limiting its suitability for new designs. It is ROHS3 compliant and supplied in cut tape format. This option is viable only for legacy system maintenance where existing inventory is available.

Frequently Asked Questions (FAQ)

Q: Can HCPL2730S or HCPL2730SD be used as direct replacements for HCPL-2730#300?

A: Yes, with isolation voltage consideration. Both parts maintain the same 2-channel Darlington output configuration, 300% minimum current transfer ratio, 60mA output current per channel, and 8-SMD Gull Wing package. The primary difference is isolation voltage: HCPL-2730#300 is rated 3750Vrms, while HCPL2730S and HCPL2730SD are rated 2500Vrms. Applications requiring the full 3750Vrms isolation specification must use HCPL-2730-300E.

Q: What is the difference between HCPL-2730#300 and HCPL-2730-300E?

A: These parts are electrically identical with matching isolation voltage (3750Vrms), current transfer ratio (300% minimum), and output specifications. The primary differences are product status and compliance: HCPL-2730-300E is currently active and ROHS3 compliant, while HCPL-2730#300 is discontinued and RoHS non-compliant. HCPL-2730-300E is the recommended replacement for new designs.

Q: Are there packaging differences between substitute parts?

A: All substitute parts use the same 8-SMD Gull Wing package configuration. However, supplier packaging differs: HCPL-2730-300E is supplied in tube format, HCPL2730S in bulk, and HCPL2730SD in cut tape. These packaging variations do not affect electrical performance or circuit compatibility.

Q: What is the impact of reduced isolation voltage in HCPL2730S and HCPL2730SD?

A: The 2500Vrms isolation rating of HCPL2730S and HCPL2730SD is lower than the 3750Vrms specification of HCPL-2730#300. Applications designed for 3750Vrms isolation must use HCPL-2730-300E to maintain the original isolation specification. For applications with 2500Vrms isolation requirements or lower, HCPL2730S and HCPL2730SD provide equivalent functionality.

Q: Why is HCPL2730SD listed as obsolete?

A: HCPL2730SD is marked as obsolete by onsemi, indicating it is no longer in active production. While existing inventory may be available, this part is not recommended for new designs. HCPL2730S (Fairchild Semiconductor, active status) or HCPL-2730-300E (Broadcom Limited, active status) are preferred alternatives.

Q: Do the substitute parts have different operating temperature ranges?

A: Yes. HCPL-2730#300 and HCPL-2730-300E operate from 0°C to 70°C. HCPL2730S and HCPL2730SD extend this range to -40°C to 85°C, providing broader environmental capability for applications requiring extended temperature operation.