HCPL-4502#020 Equivalent & Substitute Parts

Part Overview

The HCPL-4502#020 is a 5000Vrms optoisolator with transistor output in 8-DIP packaging, manufactured by Broadcom Limited. This component provides galvanic isolation for single-channel DC input applications with 8mA output current capability. The part is discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain electrical and mechanical compatibility for ongoing system support and new designs.

Key Parameters

Parameter	Value
Voltage - Isolation	5000Vrms
Number of Channels	1
Current Transfer Ratio (Min)	19% @ 16mA
Current Transfer Ratio (Max)	50% @ 16mA
Turn On / Turn Off Time (Typ)	200ns, 600ns
Input Type	DC
Output Type	Transistor
Voltage - Output (Max)	20V
Current - Output / Channel	8mA
Voltage - Forward (Vf) (Typ)	1.5V
Current - DC Forward (If) (Max)	25mA
Operating Temperature	-55°C ~ 100°C
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the HCPL-4502#020 is determined by strict equivalence across the following critical parameters:

Voltage - Isolation: 5000Vrms (mandatory match)
Number of Channels: 1 (mandatory match)
Current Transfer Ratio range: 19% to 50% @ 16mA (mandatory match)
Input Type: DC (mandatory match)
Output Type: Transistor (mandatory match)
Voltage - Output (Max): 20V (mandatory match)
Current - Output / Channel: 8mA (mandatory match)
Package / Case: 8-DIP (0.300", 7.62mm) (mandatory match)
Operating Temperature: -55°C ~ 100°C (mandatory match)

Substitute parts are grouped into two categories:

Direct Manufacturer Equivalents (Broadcom Limited): Parts with identical base specifications and same manufacturer lineage, differing only in packaging format or RoHS compliance status.

Parametric Equivalents (Cross-Manufacturer): Parts from alternative manufacturers (Broadcom HCPL-4503 series, Everlight EL4502 series) that meet all electrical and mechanical parameters within specified tolerances.

Parameter Comparison

Parameter	HCPL-4502#020	HCPL-4502-020E	HCPL-4503#020	HCPL-4503-020E	EL4502	EL4502-V
Manufacturer	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Everlight Electronics	Everlight Electronics
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms
Number of Channels	1	1	1	1	1	1
Current Transfer Ratio (Min)	19% @ 16mA	19% @ 16mA	19% @ 16mA	19% @ 16mA	19% @ 16mA	19% @ 16mA
Current Transfer Ratio (Max)	50% @ 16mA	50% @ 16mA	50% @ 16mA	50% @ 16mA	50% @ 16mA	50% @ 16mA
Turn On / Turn Off Time (Typ)	200ns, 600ns	200ns, 600ns	200ns, 600ns	200ns, 600ns	350ns, 300ns	350ns, 300ns
Input Type	DC	DC	DC	DC	DC	DC
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	20V	20V	20V	20V	20V	20V
Current - Output / Channel	8mA	8mA	8mA	8mA	8mA	8mA
Voltage - Forward (Vf) (Typ)	1.5V	1.5V	1.5V	1.5V	1.45V	1.45V
Current - DC Forward (If) (Max)	25mA	25mA	25mA	25mA	25mA	25mA
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For RoHS3 Compliance Requirements: HCPL-4502-020E, HCPL-4503-020E, EL4502, and EL4502-V are all ROHS3 compliant and suitable for applications requiring regulatory compliance with modern environmental standards.

For Legacy Non-Compliant Systems: HCPL-4503#020 maintains RoHS non-compliant status matching the original HCPL-4502#020, appropriate for systems where compliance status must remain unchanged.

For Broadcom Ecosystem Continuity: HCPL-4502-020E and HCPL-4503 series parts maintain Broadcom manufacturer lineage with active product status, ensuring long-term availability and consistent supply chain management.

For Cross-Manufacturer Flexibility: EL4502 and EL4502-V from Everlight Electronics provide parametric equivalence with higher inventory availability (9063 and 803 units respectively) and active product status, offering alternative sourcing options.

Timing Considerations: EL4502 and EL4502-V exhibit slightly different turn-on/turn-off timing (350ns, 300ns versus 200ns, 600ns) and forward voltage (1.45V versus 1.5V). These variations remain within acceptable tolerances for most DC isolation applications but should be evaluated against specific circuit timing requirements.

Frequently Asked Questions (FAQ)

Q: Can HCPL-4502#020 be directly replaced with HCPL-4502-020E?

A: Yes. HCPL-4502-020E is the direct equivalent with identical electrical specifications. The primary difference is packaging format (Tube) and RoHS3 compliance status. Pin configuration and functional performance are identical.

Q: What is the difference between HCPL-4503 and HCPL-4502 series?

A: Both series meet identical electrical and mechanical parameters for isolation voltage, channel count, current transfer ratio, output voltage, output current, and operating temperature. They are parametric equivalents suitable for interchangeable use in circuit designs.

Q: Are Everlight EL4502 parts suitable replacements?

A: EL4502 and EL4502-V meet all critical electrical parameters and package specifications. Turn-on/turn-off timing differs (350ns/300ns versus 200ns/600ns) and forward voltage is slightly lower (1.45V versus 1.5V). These differences are within acceptable tolerances for DC isolation applications but should be evaluated against specific circuit timing constraints.

Q: Does package format affect compatibility?

A: No. All substitute parts use identical 8-DIP (0.300", 7.62mm) through-hole packaging. Packaging format differences (Tube versus other formats) refer to supply packaging only and do not affect PCB mounting or electrical performance.

Q: Which substitute offers the best long-term availability?

A: EL4502 and EL4502-V from Everlight Electronics show the highest current inventory levels (9063 and 803 units) with active product status, providing the strongest long-term supply assurance.

Q: Are there RoHS compliance implications when substituting?

A: Yes. The original HCPL-4502#020 is RoHS non-compliant. Substitution with ROHS3-compliant alternatives (HCPL-4502-020E, HCPL-4503-020E, EL4502, EL4502-V) may trigger compliance documentation updates. HCPL-4503#020 maintains non-compliant status if compliance status must remain unchanged.

Q: What is the moisture sensitivity level for all substitute parts?

A: All parts, including the original HCPL-4502#020 and all substitutes, have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

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