HCPL-0452 Optoisolator Equivalent & Substitute Parts

Part Overview

The HCPL-0452 is a single-channel optoisolator with transistor output manufactured by Broadcom Limited, rated for 3750Vrms isolation voltage. This component is designed for high-speed signal isolation applications requiring galvanic isolation between input and output circuits. The part is currently in active production status with 1252 units in stock. Alternative models are necessary to address specific application requirements including RoHS compliance, enhanced performance specifications, or alternative sourcing strategies.

Key Parameters

Parameter	Value
Manufacturer	Broadcom Limited
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	3750Vrms
Current Transfer Ratio (Min)	15% @ 16mA
Output Type	Transistor
Voltage - Output (Max)	20V
Current - Output / Channel	8mA
Operating Temperature	-55°C ~ 100°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the HCPL-0452 are classified based on the following substitution criteria:

Parametric Equivalents maintain identical electrical and mechanical specifications:

Voltage isolation: 3750Vrms
Current transfer ratio: 15% @ 16mA minimum
Output voltage maximum: 20V
Output current: 8mA per channel
Package: 8-SOIC form factor
Operating temperature range: -55°C ~ 100°C

Manufacturer Recommended Alternatives provide functionally compatible solutions with variations in isolation voltage, current transfer ratio range, switching speed, or compliance certifications while maintaining the same package footprint and output current capability.

The key parameters determining substitution eligibility are: isolation voltage rating, current transfer ratio specifications, maximum output voltage, output current capacity, package type, and operating temperature range.

Parameter Comparison

Parameter	HCPL-0452	HCPL-0452-000E	HCPL-0453-000E	HCPL0453 (Fairchild)	SFH6343T	HCPL-0453
Manufacturer	Broadcom	Broadcom	Broadcom	Fairchild	Vishay	Broadcom
Voltage - Isolation	3750Vrms	3750Vrms	3750Vrms	2500Vrms	4000Vrms	3750Vrms
Current Transfer Ratio (Min)	15% @ 16mA	15% @ 16mA	15% @ 16mA	19% @ 16mA	19% @ 16mA	15% @ 16mA
Current Transfer Ratio (Max)	—	—	—	50% @ 16mA	50% @ 16mA	—
Turn On / Turn Off Time (Typ)	1µs, 1µs	1µs, 1µs	1µs, 1µs	450ns, 300ns	250ns, 500ns	1µs, 1µs
Voltage - Output (Max)	20V	20V	20V	20V	25V	20V
Current - Output / Channel	8mA	8mA	8mA	8mA	8mA	8mA
Voltage - Forward (Vf) (Typ)	1.5V	1.5V	1.5V	1.45V	1.6V	1.5V
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-40°C ~ 85°C	-55°C ~ 100°C	-55°C ~ 100°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	Non-compliant
Inventory (Pcs)	1252	1150	2202	3130	12560	1352

Engineering Selection Recommendations

HCPL-0452-000E is a direct parametric equivalent with identical electrical specifications and RoHS3 compliance certification. This substitute is suitable for applications requiring regulatory compliance without performance trade-offs.

HCPL-0453-000E maintains parametric equivalence to the HCPL-0452 with RoHS3 compliance and higher inventory availability (2202 units). This part is recommended for high-volume procurement scenarios.

HCPL-0453 (Broadcom) is a parametric equivalent without RoHS compliance. Selection of this part is appropriate only when regulatory compliance is not a design requirement.

HCPL0453 (Fairchild Semiconductor) operates at reduced isolation voltage (2500Vrms versus 3750Vrms) and narrower operating temperature range (-40°C ~ 85°C versus -55°C ~ 100°C). This substitute is suitable only for applications with lower isolation voltage requirements and standard industrial temperature ranges. Faster switching characteristics (450ns/300ns) may provide performance benefits in high-speed applications.

SFH6343T (Vishay) provides enhanced isolation voltage (4000Vrms) and higher maximum output voltage (25V) with superior switching speed (250ns/500ns). This substitute is appropriate for applications requiring higher isolation margins or faster signal transitions. RoHS3 compliance and extended temperature range (-55°C ~ 100°C) are supported. Highest inventory availability (12560 units) supports immediate procurement.

Frequently Asked Questions (FAQ)

Q: Can HCPL0453 from Fairchild replace HCPL-0452 in all applications?

A: HCPL0453 is not a direct replacement. The isolation voltage is reduced from 3750Vrms to 2500Vrms, and the operating temperature range is narrower (-40°C ~ 85°C versus -55°C ~ 100°C). Substitution is valid only for applications that do not require the full 3750Vrms isolation rating or extended low-temperature operation below -40°C.

Q: What is the difference between HCPL-0452 and HCPL-0452-000E?

A: Both parts are parametrically identical with matching electrical specifications. The primary difference is RoHS3 compliance certification on the HCPL-0452-000E. The suffix "-000E" indicates the RoHS-compliant variant. Selection depends on regulatory requirements for the end application.

Q: Is SFH6343T a suitable substitute for cost reduction?

A: SFH6343T is functionally compatible and offers higher isolation voltage (4000Vrms) and faster switching performance. However, cost comparison requires current pricing data. The part is suitable from a technical standpoint for applications benefiting from enhanced isolation margins or higher output voltage capability (25V maximum).

Q: Can I use HCPL-0453 instead of HCPL-0452?

A: Yes, HCPL-0453 is a parametric equivalent with identical isolation voltage (3750Vrms), current transfer ratio, output specifications, and temperature range. The primary consideration is RoHS compliance status; HCPL-0453 is non-compliant, matching the original HCPL-0452.

Q: What package considerations apply to these substitutes?

A: All substitute parts use the 8-SOIC (0.154", 3.90mm width) package footprint, ensuring mechanical and electrical compatibility on printed circuit boards. No layout modifications are required for package-level substitution.

Q: Which substitute offers the best availability?

A: SFH6343T has the highest inventory level at 12560 units in stock, followed by HCPL-0453-000E with 2202 units. For immediate procurement of large quantities, SFH6343T is the preferred choice from an availability standpoint.

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