HCPL-J454 Equivalent & Substitute Parts

Part Overview

The HCPL-J454 is an optoisolator with transistor output manufactured by Broadcom Limited. This 8-DIP through-hole component provides 3750Vrms isolation with a single channel and 1-8mA output current capability. The device is currently active in production with 23,664 units in stock.

Substitute parts are identified when equivalent electrical and mechanical parameters align with the original specification, enabling direct replacement in applications where the primary part becomes unavailable or when alternative compliance certifications are required.

Substiute Parts

HCPL-J454

Broadcom LimitedIn Stock: 23694HCPL-J454 Datasheet

Current PartRFQ

HCPL4503M

onsemiIn Stock: 6122HCPL4503M Datasheet

MFR RecommendedRFQ

SFH6345

Vishay Semiconductor Opto DivisionIn Stock: 2245SFH6345 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute optoisolators for the HCPL-J454 are qualified based on the following critical parameters:

• Package compatibility: 8-DIP (0.300", 7.62mm) through-hole mounting
• Channel configuration: Single channel operation
• Isolation voltage: Minimum 3750Vrms (equal or higher isolation rating acceptable)
• Output type: Transistor output configuration
• Input type: DC input
• Output current capability: 8mA per channel
• Maximum output voltage: 20V or higher
• Current transfer ratio: Minimum 19% @ 16mA
• Operating temperature range: Must encompass or match -55°C ~ 100°C
• Forward current rating: 25mA maximum DC forward current

The HCPL4503M and SFH6345 meet these substitution criteria with equal or superior isolation ratings, compatible package geometry, and matching electrical performance within the specified operating envelope.

Parameter Comparison

Engineering Selection Recommendations

HCPL4503M (onsemi): This substitute provides 5000Vrms isolation, exceeding the HCPL-J454 specification by 1250Vrms. The device achieves faster switching performance (250ns/260ns versus 500ns/800ns) and maintains identical output current and forward current ratings. ROHS3 compliance is available. The operating temperature range is -40°C ~ 100°C, which does not extend to the lower -55°C limit of the original part. This substitute is suitable for applications where the extended low-temperature range is not required and RoHS compliance is beneficial.

SFH6345 (Vishay Semiconductor Opto Division): This substitute provides 5300Vrms isolation, the highest among the three options, with improved switching speed (300ns/300ns) and lower forward voltage (1.33V typical). Maximum output voltage is rated at 25V, providing additional margin. ROHS3 compliance is available. The operating temperature range matches the original specification at -55°C ~ 100°C. This substitute is suitable for applications requiring extended low-temperature operation and maximum isolation voltage margin.

Both substitutes maintain the critical parameters of single-channel configuration, 8-DIP package geometry, 8mA output current, 25mA forward current rating, and DC input operation.

Frequently Asked Questions (FAQ)

Q: Can HCPL4503M replace HCPL-J454 in all applications?

A: HCPL4503M is electrically compatible for most applications due to matching output current, forward current, and isolation voltage exceeding the original specification. However, the operating temperature range is limited to -40°C ~ 100°C. Applications requiring operation below -40°C must use SFH6345 or the original HCPL-J454.

Q: What is the difference between HCPL4503M and SFH6345?

A: Both devices exceed the HCPL-J454 isolation voltage specification. HCPL4503M offers faster switching (250ns/260ns) and is ROHS3 compliant but has a limited low-temperature range (-40°C minimum). SFH6345 matches the full temperature range (-55°C ~ 100°C), provides the highest isolation voltage (5300Vrms), and features lower forward voltage (1.33V). Selection depends on temperature requirements and switching speed priorities.

Q: Are all three parts pin-compatible?

A: All three devices use the 8-DIP (0.300", 7.62mm) package. However, HCPL4503M features transistor output with base access, while HCPL-J454 and SFH6345 provide standard transistor output. Pin configuration must be verified against specific application requirements before substitution.

Q: What compliance certifications apply to these parts?

A: HCPL-J454 is RoHS non-compliant. HCPL4503M and SFH6345 are both ROHS3 compliant. All three parts are REACH unaffected and classified as EAR99 for export control purposes.

Q: Can these parts be used interchangeably in high-isolation applications?

A: Yes, within the specified electrical and temperature parameters. SFH6345 provides the highest isolation voltage (5300Vrms) and is recommended for applications requiring maximum isolation margin. HCPL4503M is suitable where isolation voltage exceeds 5000Vrms and operating temperature remains above -40°C.