HCPL-2730#320 Equivalent & Substitute Parts

Part Overview

The HCPL-2730#320 is a 2-channel optoisolator with Darlington output, rated for 5000Vrms isolation voltage. This component is designed for applications requiring high-voltage isolation between logic and power circuits. The main part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain compatibility across isolation voltage, channel count, output type, and package configuration.

Key Parameters

Parameter	Value
Number of Channels	2
Voltage - Isolation	5000Vrms
Output Type	Darlington
Current Transfer Ratio (Min)	300% @ 1.6mA
Voltage - Output (Max)	7V
Current - Output / Channel	60mA
Package / Case	8-SMD, Gull Wing
Operating Temperature	0°C ~ 70°C
Input Type	DC

Substitute Part Grouping Explanation

Substitution eligibility for the HCPL-2730#320 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
Input Type: Must be DC
Voltage - Output (Max): Must be 7V
Current - Output / Channel: Must be 60mA

The HCPL-2730#320 operates at 5000Vrms isolation voltage. Substitute parts with lower isolation ratings (2500Vrms) are functionally compatible in applications where the lower isolation specification is acceptable. All identified substitutes maintain the same channel count, output type, package configuration, and output current rating.

Parameter Comparison

Parameter	HCPL-2730#320	HCPL-2730-320E	HCPL2730S	HCPL2730SD
Manufacturer	Broadcom Limited	Broadcom Limited	Fairchild Semiconductor	onsemi
Number of Channels	2	2	2	2
Voltage - Isolation	5000Vrms	5000Vrms	2500Vrms	2500Vrms
Current Transfer Ratio (Min)	300% @ 1.6mA	300% @ 1.6mA	300% @ 1.6mA	300% @ 1.6mA
Turn On / Turn Off Time (Typ)	5µs, 10µs	5µs, 10µs	300ns, 5µs	300ns, 5µs
Output Type	Darlington	Darlington	Darlington	Darlington
Voltage - Output (Max)	7V	7V	7V	7V
Current - Output / Channel	60mA	60mA	60mA	60mA
Voltage - Forward (Vf) (Typ)	1.4V	1.4V	1.3V	1.3V
Current - DC Forward (If) (Max)	12 mA	12 mA	20 mA	20 mA
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing
Product Status	Discontinued at DiGi Electronics	Active	Active	Obsolete
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: HCPL-2730-320E

The HCPL-2730-320E is the direct equivalent from Broadcom Limited. It maintains identical electrical specifications including 5000Vrms isolation voltage, current transfer ratio, output voltage, and current ratings. The part is currently Active and ROHS3 Compliant. This substitute is the preferred choice for direct replacement in new designs and production continuity.

Secondary Substitutes: HCPL2730S and HCPL2730SD

Both HCPL2730S (Fairchild Semiconductor) and HCPL2730SD (onsemi) operate at 2500Vrms isolation voltage, which is lower than the original 5000Vrms specification. These parts maintain identical channel count, output type, package configuration, and output current ratings. HCPL2730S is Active and available in bulk packaging. HCPL2730SD is Obsolete and should not be selected for new designs. Both parts feature extended operating temperature ranges (-40°C ~ 85°C) compared to the original specification (0°C ~ 70°C).

Selection between primary and secondary substitutes depends on application isolation voltage requirements. Applications requiring 5000Vrms isolation must use HCPL-2730-320E. Applications tolerant of 2500Vrms isolation may use HCPL2730S.

Frequently Asked Questions (FAQ)

Q: Can HCPL2730S or HCPL2730SD be used as direct replacements for HCPL-2730#320?

A: Both parts are functionally compatible in applications where 2500Vrms isolation voltage is acceptable. The lower isolation rating is the only electrical difference. All other parameters including channel count, output type, current ratings, and package configuration are identical.

Q: What is the difference between HCPL-2730#320 and HCPL-2730-320E?

A: Both parts are manufactured by Broadcom Limited and share identical electrical specifications. HCPL-2730-320E is the active production variant with ROHS3 compliance. HCPL-2730#320 is discontinued. HCPL-2730-320E is the direct replacement.

Q: Are there temperature operating range differences between substitutes?

A: Yes. HCPL-2730#320 and HCPL-2730-320E operate from 0°C ~ 70°C. HCPL2730S and HCPL2730SD operate from -40°C ~ 85°C, providing extended temperature capability.

Q: Does packaging differ between these parts?

A: All four parts use 8-SMD, Gull Wing package configuration. Packaging format differs (Tube for HCPL-2730-320E, Bulk for HCPL2730S, Cut Tape for HCPL2730SD), but the physical package remains identical.

Q: Why is HCPL2730SD marked as Obsolete?

A: HCPL2730SD from onsemi is listed as Obsolete and should not be selected for new designs or long-term production applications. HCPL2730S from Fairchild Semiconductor remains Active and is the preferred alternative if 2500Vrms isolation is acceptable.

Q: What are the compliance differences between substitutes?

A: HCPL-2730-320E and HCPL2730SD are ROHS3 Compliant. HCPL-2730#320 is RoHS non-compliant. HCPL2730S compliance status is not specified in available data.

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