HCPL0730R2 Equivalent & Substitute Parts

Part Overview

The HCPL0730R2 is a 2-channel optoisolator with Darlington output manufactured by onsemi, rated for 2500Vrms isolation voltage. This component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement continuity. The part operates across the industrial temperature range of -40°C to 85°C and is packaged in 8-SOIC surface mount configuration.

Key Parameters

Parameter	Value
Manufacturer Part Number	HCPL0730R2
Manufacturer	onsemi
Category	Optoisolators
Number of Channels	2
Voltage - Isolation	2500Vrms
Current Transfer Ratio (Min)	300% @ 1.6mA
Current Transfer Ratio (Max)	5000% @ 1.6mA
Output Type	Darlington
Voltage - Output (Max)	7V
Current - Output / Channel	60mA
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the HCPL0730R2 is determined by the following critical parameters:

Number of Channels: Must remain 2 channels
Output Type: Must be Darlington output
Package / Case: Must be 8-SOIC form factor
Mounting Type: Must be Surface Mount
Voltage - Isolation: Minimum 2500Vrms (equal or higher acceptable)
Current - Output / Channel: Minimum 60mA (equal or higher acceptable)
Operating Temperature Range: Must support -40°C to 85°C minimum

The HCPL0731R2 qualifies as a direct manufacturer substitute from onsemi with identical isolation voltage and package specifications. The HCPL-073A series from Broadcom Limited represents a higher-specification alternative with enhanced isolation voltage (3750Vrms) and improved current transfer ratio performance, suitable for applications requiring greater isolation margin.

Parameter Comparison

Parameter	HCPL0730R2	HCPL0731R2	HCPL-073A	HCPL-073A-000E	HCPL-073A-500E
Manufacturer	onsemi	onsemi	Broadcom Limited	Broadcom Limited	Broadcom Limited
Number of Channels	2	2	2	2	2
Voltage - Isolation	2500Vrms	2500Vrms	3750Vrms	3750Vrms	3750Vrms
Current Transfer Ratio (Min)	300% @ 1.6mA	400% @ 500µA	600% @ 500µA	600% @ 500µA	600% @ 500µA
Current Transfer Ratio (Max)	5000% @ 1.6mA	5000% @ 500µA	8000% @ 500µA	8000% @ 500µA	8000% @ 500µA
Turn On / Turn Off Time (Typ)	2µs, 7µs	300ns, 1.6µs	3µs, 34µs	3µs, 34µs	3µs, 34µs
Output Type	Darlington	Darlington	Darlington	Darlington	Darlington
Voltage - Output (Max)	7V	18V	18V	18V	18V
Current - Output / Channel	60mA	60mA	60mA	60mA	60mA
Voltage - Forward (Vf) (Typ)	1.35V	1.35V	1.25V	1.25V	1.25V
Current - DC Forward (If) (Max)	20 mA	20 mA	5 mA	5 mA	5 mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Product Status	Obsolete	Active	Active	Active	Active
Packaging	-	Tape & Reel (TR)	-	Tube	Cut Tape (CT) & Digi-Reel®
RoHS Status	-	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

HCPL0731R2 is the primary direct substitute for the HCPL0730R2. Both parts are manufactured by onsemi, share identical isolation voltage (2500Vrms) and package specifications, and maintain the same operating temperature range (-40°C to 85°C). The HCPL0731R2 is currently in active production status with ROHS3 compliance, providing immediate procurement availability and regulatory alignment.

HCPL-073A series (HCPL-073A, HCPL-073A-000E, HCPL-073A-500E) from Broadcom Limited represents an enhanced alternative with 3750Vrms isolation voltage, providing 50% greater isolation margin. These parts maintain identical channel count, output type, and current rating. However, the operating temperature range is restricted to 0°C to 70°C, which does not support the full -40°C to 85°C range of the original part. The HCPL-073A-000E and HCPL-073A-500E variants are ROHS3 compliant, while the base HCPL-073A is RoHS non-compliant.

Selection between onsemi and Broadcom alternatives depends on application temperature requirements and isolation voltage margin needs. For applications requiring the full -40°C to 85°C operating range, HCPL0731R2 is the appropriate choice. For applications operating within 0°C to 70°C with higher isolation voltage requirements, the Broadcom HCPL-073A series is suitable.

Frequently Asked Questions (FAQ)

Q: Can HCPL0731R2 be used as a direct replacement for HCPL0730R2?

A: Yes. Both parts share identical isolation voltage (2500Vrms), channel count (2), output type (Darlington), package configuration (8-SOIC), and current rating (60mA per channel). The HCPL0731R2 is the active production equivalent from the same manufacturer.

Q: What is the key difference between HCPL0731R2 and HCPL-073A series?

A: The primary difference is isolation voltage: HCPL0731R2 provides 2500Vrms isolation, while HCPL-073A series provides 3750Vrms. Additionally, HCPL-073A series has a restricted operating temperature range (0°C to 70°C) compared to HCPL0731R2 (-40°C to 85°C). The HCPL-073A series also exhibits faster turn-on time (300ns vs. 2µs) but slower turn-off time (1.6µs vs. 7µs for HCPL0731R2).

Q: Are the HCPL-073A packaging variants (tube, cut tape, digi-reel) functionally equivalent?

A: Yes. HCPL-073A, HCPL-073A-000E, and HCPL-073A-500E are electrically identical. The designations indicate packaging and delivery format only: standard form, tube packaging, and cut tape with digi-reel respectively. Functional performance and electrical specifications are identical across all three variants.

Q: Can HCPL-073A series be used in applications requiring -40°C operation?

A: No. The HCPL-073A series operating temperature range is 0°C to 70°C. Applications requiring operation below 0°C must use HCPL0731R2, which supports -40°C to 85°C.

Q: What is the significance of the maximum output voltage difference (7V vs. 18V)?

A: The HCPL0730R2 has a maximum output voltage of 7V, while HCPL0731R2 and HCPL-073A series support 18V. This parameter defines the maximum voltage that can be applied to the output stage. Applications designed for the original 7V specification will function with higher-voltage-rated substitutes, but the reverse is not true. Verify that circuit design accommodates the higher voltage rating if substituting with 18V-rated parts.

Q: Are there compliance differences between substitute options?

A: Yes. HCPL0731R2 is ROHS3 compliant. Within the HCPL-073A series, HCPL-073A-000E and HCPL-073A-500E are ROHS3 compliant, while the base HCPL-073A is RoHS non-compliant. All parts are REACH unaffected and carry EAR99 ECCN classification.

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