HCPL0452 Equivalent & Substitute Parts

Part Overview

The HCPL0452 is a single-channel optoisolator with transistor output, rated for 2500Vrms isolation voltage. Manufactured by onsemi, this component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The HCPL0452 operates with a current transfer ratio between 19% and 50% at 16mA input, featuring fast switching characteristics with typical turn-on and turn-off times of 450ns and 300ns respectively. Surface mount packaging in 8-SOIC format enables integration into modern PCB designs.

Key Parameters

Parameter	Value
Manufacturer Part Number	HCPL0452
Manufacturer	onsemi
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	2500Vrms
Current Transfer Ratio (Min)	19% @ 16mA
Current Transfer Ratio (Max)	50% @ 16mA
Turn On / Turn Off Time (Typ)	450ns, 300ns
Output Type	Transistor
Voltage - Output (Max)	20V
Current - Output / Channel	8mA
Voltage - Forward (Vf) (Typ)	1.45V
Current - DC Forward (If) (Max)	25mA
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 of the HCPL0452 is determined by the following critical parameters: single-channel configuration, transistor output topology, isolation voltage rating, current transfer ratio range, switching speed characteristics, maximum output voltage, output current capability, forward voltage drop, and 8-SOIC package compatibility.

Four substitute parts meet these criteria with varying isolation voltage ratings and compliance certifications:

HCPL0453 (Fairchild Semiconductor) - Identical electrical specifications to the HCPL0452 with matching isolation voltage (2500Vrms), current transfer ratio (19-50% @ 16mA), and switching times (450ns, 300ns). Active product status. Packaging: Bulk.

HCPL-0452#500 (Broadcom Limited) - Enhanced isolation voltage (3750Vrms) with reduced current transfer ratio minimum (15% @ 16mA) and slower switching times (1µs typical). Extended operating temperature range (-55°C ~ 100°C). Packaging: Tape & Reel. RoHS non-compliant.

HCPL-0452-000E (Broadcom Limited) - Identical electrical specifications to HCPL-0452#500 with enhanced isolation (3750Vrms) and extended temperature range. Packaging: Tube. ROHS3 compliant.

SFH6343T (Vishay Semiconductor Opto Division) - Highest isolation voltage (4000Vrms) with matching current transfer ratio (19-50% @ 16mA) and fastest switching times (250ns turn-on, 500ns turn-off). Maximum output voltage increased to 25V. Extended operating temperature range (-55°C ~ 100°C). Packaging: Tape & Reel. ROHS3 compliant.

Parameter Comparison

Parameter	HCPL0452	HCPL0453	HCPL-0452#500	HCPL-0452-000E	SFH6343T
Manufacturer	onsemi	Fairchild Semiconductor	Broadcom Limited	Broadcom Limited	Vishay Semiconductor Opto Division
Number of Channels	1	1	1	1	1
Voltage - Isolation	2500Vrms	2500Vrms	3750Vrms	3750Vrms	4000Vrms
Current Transfer Ratio (Min)	19% @ 16mA	19% @ 16mA	15% @ 16mA	15% @ 16mA	19% @ 16mA
Current Transfer Ratio (Max)	50% @ 16mA	50% @ 16mA	—	—	50% @ 16mA
Turn On Time (Typ)	450ns	450ns	1µs	1µs	250ns
Turn Off Time (Typ)	300ns	300ns	1µs	1µs	500ns
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	20V	20V	20V	20V	25V
Current - Output / Channel	8mA	8mA	8mA	8mA	8mA
Voltage - Forward (Vf) (Typ)	1.45V	1.45V	1.5V	1.5V	1.6V
Current - DC Forward (If) (Max)	25mA	25mA	25mA	25mA	25mA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°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)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Replacement (Electrical Equivalence): HCPL0453 provides identical electrical performance to the HCPL0452 with matching isolation voltage, current transfer ratio, and switching characteristics. As an active product from Fairchild Semiconductor, it is the preferred choice for designs requiring exact electrical compatibility without performance trade-offs.

Enhanced Isolation Voltage: HCPL-0452#500 and HCPL-0452-000E both offer increased isolation voltage (3750Vrms) suitable for applications requiring higher dielectric strength. HCPL-0452-000E is ROHS3 compliant, making it appropriate for designs subject to RoHS regulations. Both parts feature extended operating temperature range (-55°C ~ 100°C) compared to the original specification.

Superior Performance with Highest Isolation: SFH6343T delivers the highest isolation voltage (4000Vrms) with the fastest switching times (250ns turn-on, 500ns turn-off) and increased maximum output voltage (25V). ROHS3 compliance and extended temperature range support demanding applications. This part is suitable for designs where enhanced performance margins and regulatory compliance are required.

Compliance Considerations: For new designs subject to RoHS requirements, HCPL-0452-000E and SFH6343T are ROHS3 compliant. HCPL-0452#500 is RoHS non-compliant and should be avoided in regulated applications.

Frequently Asked Questions (FAQ)

Q: Can HCPL0453 be used as a direct replacement for HCPL0452?

A: Yes. HCPL0453 matches all critical electrical parameters including isolation voltage (2500Vrms), current transfer ratio (19-50% @ 16mA), switching times (450ns, 300ns), and 8-SOIC package. It is an active product suitable for new designs.

Q: What is the difference between HCPL-0452#500 and HCPL-0452-000E?

A: Both parts share identical electrical specifications with 3750Vrms isolation voltage and extended temperature range (-55°C ~ 100°C). The primary difference is packaging (Tape & Reel versus Tube) and compliance status: HCPL-0452#500 is RoHS non-compliant, while HCPL-0452-000E is ROHS3 compliant.

Q: Is SFH6343T compatible with HCPL0452 designs?

A: SFH6343T is mechanically and functionally compatible with identical 8-SOIC packaging and single-channel transistor output. Electrical differences include higher isolation voltage (4000Vrms), faster switching times (250ns turn-on, 500ns turn-off), and increased maximum output voltage (25V). These enhancements make it suitable for applications requiring superior performance margins.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution is determined by single-channel configuration, transistor output topology, 8-SOIC package compatibility, isolation voltage rating, current transfer ratio range, switching speed characteristics, maximum output voltage, and output current capability. All listed substitutes meet these core requirements.

Q: Which substitute part should be selected for RoHS-compliant applications?

A: HCPL-0452-000E and SFH6343T are both ROHS3 compliant. HCPL-0452-000E provides electrical equivalence with extended isolation voltage, while SFH6343T offers enhanced performance with the highest isolation rating and fastest switching times.

Q: How do switching times affect circuit performance?

A: Switching times determine the maximum operating frequency and signal fidelity in high-speed applications. HCPL0452 and HCPL0453 feature 450ns turn-on and 300ns turn-off times. HCPL-0452#500 and HCPL-0452-000E have slower 1µs switching times. SFH6343T offers the fastest performance with 250ns turn-on and 500ns turn-off times, suitable for demanding high-frequency applications.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts use 8-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring PCB layout compatibility. Packaging options differ by supplier: HCPL0453 (Bulk), HCPL-0452#500 (Tape & Reel), HCPL-0452-000E (Tube), and SFH6343T (Tape & Reel).

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