HCPL0730 Equivalent & Substitute Parts

Part Overview

The HCPL0730 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 requirements. The HCPL0730 operates as a DC input optocoupler with Darlington output configuration, suitable for applications requiring galvanic isolation in 8-SOIC surface mount packages.

Key Parameters

Parameter	HCPL0730 (onsemi)
Number of Channels	2
Voltage - Isolation	2500Vrms
Current Transfer Ratio (Min)	300% @ 1.6mA
Current Transfer Ratio (Max)	5000% @ 1.6mA
Turn On / Turn Off Time (Typ)	2µs, 7µs
Output Type	Darlington
Voltage - Output (Max)	7V
Current - Output / Channel	60mA
Voltage - Forward (Vf) (Typ)	1.35V
Current - DC Forward (If) (Max)	20mA
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the HCPL0730 is determined by the following critical parameters: 2-channel configuration, Darlington output type, 8-SOIC package, surface mount mounting, and isolation voltage rating. The substitute parts are grouped into two categories based on electrical compatibility:

Direct Functional Substitute (Active Status):

HCPL0731 (onsemi) - Maintains 2500Vrms isolation, 2-channel Darlington output, identical package, and active product status. Differs in current transfer ratio test conditions and turn-on/turn-off timing specifications.

Higher Isolation Voltage Substitutes (3750Vrms):

HCPL-0730 (Broadcom Limited)
HCPL-0730-000E (Broadcom Limited)
HCPL-0730-500E (Broadcom Limited)
HCPL-073A (Broadcom Limited)
HCPL-073A-000E (Broadcom Limited)
HCPL-073A-500E (Broadcom Limited)

These Broadcom parts provide enhanced isolation voltage (3750Vrms vs. 2500Vrms), maintaining 2-channel Darlington output and 8-SOIC package compatibility. Differences exist in current transfer ratio specifications, timing characteristics, and maximum output voltage ratings.

Parameter Comparison

Parameter	HCPL0730 (onsemi)	HCPL0731 (onsemi)	HCPL-0730 (Broadcom)	HCPL-0730-000E (Broadcom)	HCPL-0730-500E (Broadcom)	HCPL-073A (Broadcom)	HCPL-073A-000E (Broadcom)	HCPL-073A-500E (Broadcom)
Manufacturer	onsemi	onsemi	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited
Number of Channels	2	2	2	2	2	2	2	2
Voltage - Isolation	2500Vrms	2500Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms	3750Vrms
Current Transfer Ratio (Min)	300% @ 1.6mA	400% @ 500µA	300% @ 1.6mA	300% @ 1.6mA	300% @ 1.6mA	600% @ 500µA	600% @ 500µA	600% @ 500µA
Current Transfer Ratio (Max)	5000% @ 1.6mA	5000% @ 500µA	2600% @ 1.6mA	2600% @ 1.6mA	2600% @ 1.6mA	8000% @ 500µA	8000% @ 500µA	8000% @ 500µA
Turn On / Turn Off Time (Typ)	2µs, 7µs	300ns, 1.6µs	5µs, 10µs	5µs, 10µs	5µs, 10µs	3µs, 34µs	3µs, 34µs	3µs, 34µs
Output Type	Darlington	Darlington	Darlington	Darlington	Darlington	Darlington	Darlington	Darlington
Voltage - Output (Max)	7V	18V	7V	7V	7V	18V	18V	18V
Current - Output / Channel	60mA	60mA	60mA	60mA	60mA	60mA	60mA	60mA
Voltage - Forward (Vf) (Typ)	1.35V	1.35V	1.4V	1.4V	1.4V	1.25V	1.25V	1.25V
Current - DC Forward (If) (Max)	20mA	20mA	12mA	12mA	12mA	5mA	5mA	5mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (Active Product Status): HCPL0731 (onsemi) is the primary active substitute, maintaining identical isolation voltage (2500Vrms), channel count, and package configuration. This part carries active product status and ROHS3 compliance, making it suitable for new designs requiring the original electrical specifications.

For Enhanced Isolation Requirements: Broadcom HCPL-073A series (HCPL-073A, HCPL-073A-000E, HCPL-073A-500E) provides 3750Vrms isolation with higher current transfer ratios (600-8000% @ 500µA) and increased maximum output voltage (18V). These parts are active and available in ROHS3 compliant variants. Selection among these three depends on packaging requirements: standard tube, tube with suffix -000E, or cut tape/digi-reel with suffix -500E.

For Standard Isolation with Broadcom Sourcing: HCPL-0730 series (HCPL-0730, HCPL-0730-000E, HCPL-0730-500E) maintains 3750Vrms isolation with specifications closer to the original HCPL0730. HCPL-0730-000E and HCPL-0730-500E offer ROHS3 compliance. Packaging variants are available in tube and tape & reel formats.

Compliance Considerations: Parts with ROHS3 compliance designation are preferred for applications subject to RoHS directives. HCPL0731, HCPL-0730-000E, HCPL-0730-500E, HCPL-073A-000E, and HCPL-073A-500E meet this requirement. Operating temperature range narrows from -40°C ~ 85°C (HCPL0730, HCPL0731) to 0°C ~ 70°C (Broadcom variants), which must be evaluated against application requirements.

Frequently Asked Questions (FAQ)

Q: Can HCPL0731 be used as a direct replacement for HCPL0730? A: Yes. HCPL0731 maintains the same 2-channel Darlington output configuration, 2500Vrms isolation voltage, 8-SOIC package, and 60mA output current per channel. Both operate across -40°C to 85°C. The primary differences are in current transfer ratio test conditions and switching timing specifications, which do not prevent functional substitution in most applications.

Q: What is the difference between HCPL-073A and HCPL-0730 from Broadcom? A: Both are 3750Vrms isolation optoisolators with 2-channel Darlington output in 8-SOIC packages. HCPL-073A provides higher current transfer ratios (600-8000% @ 500µA) and maximum output voltage of 18V, compared to HCPL-0730 (300-2600% @ 1.6mA, 7V max output). HCPL-073A also features lower forward current requirements (5mA max vs. 12mA max). Selection depends on circuit requirements for output voltage swing and current transfer characteristics.

Q: What do the suffixes -000E and -500E indicate on Broadcom parts? A: These suffixes denote packaging format. The -000E suffix indicates tube packaging, while -500E indicates tape & reel (TR) or cut tape (CT) & digi-reel packaging. The electrical specifications remain identical; selection is based on procurement and assembly requirements.

Q: Are there temperature range limitations when substituting with Broadcom parts? A: Yes. The original HCPL0730 and HCPL0731 operate from -40°C to 85°C, while all Broadcom substitutes (HCPL-0730 and HCPL-073A series) operate from 0°C to 70°C. Applications requiring operation below 0°C or above 70°C must use HCPL0731 or remain with the original HCPL0730 if available.

Q: Which substitute offers the best RoHS compliance? A: HCPL0731 (onsemi), HCPL-0730-000E, HCPL-0730-500E, HCPL-073A-000E, and HCPL-073A-500E all carry ROHS3 compliance designation. HCPL-0730 and HCPL-073A (without suffix) are RoHS non-compliant. For applications requiring RoHS compliance, select parts with explicit ROHS3 designation.

Q: Can HCPL-073A be used in applications designed for HCPL0730? A: Functional substitution is possible with design review. HCPL-073A provides higher isolation voltage (3750Vrms vs. 2500Vrms), higher current transfer ratios, and higher maximum output voltage (18V vs. 7V). These characteristics are generally compatible with HCPL0730 applications. However, the narrower operating temperature range (0°C ~ 70°C vs. -40°C ~ 85°C) and different switching timing (3µs/34µs vs. 2µs/7µs) must be evaluated against specific circuit requirements.

Q: What inventory status should influence part selection? A: All substitute parts listed carry active product status with available inventory. HCPL0731 (2629 pcs), HCPL-0730 (1666 pcs), HCPL-0730-000E (3862 pcs), HCPL-0730-500E (2200 pcs), HCPL-073A (2200 pcs), HCPL-073A-000E (1480 pcs), and HCPL-073A-500E (2800 pcs) are all in stock. Selection should prioritize active status parts to ensure long-term availability and design continuity.

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