HCPL-4503#520 Equivalent & Substitute Parts

Part Overview

The HCPL-4503#520 is an optoisolator transistor output device manufactured by Broadcom Limited, designed for high-voltage isolation applications requiring 5000Vrms isolation rating. This single-channel 8-DIP gull wing package component provides DC input with transistor output configuration, operating across the industrial temperature range of -55°C to 100°C. The part is currently active in production with 1641 units in stock. Equivalent and substitute parts are identified based on matching isolation voltage, channel count, output type, and thermal operating range to ensure functional compatibility in circuit applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	HCPL-4503#520
Manufacturer	Broadcom Limited
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
Output Type	Transistor
Input Type	DC
Current Transfer Ratio (Min)	19% @ 16mA
Current Transfer Ratio (Max)	50% @ 16mA
Turn On / Turn Off Time (Typ)	200ns, 600ns
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	Surface Mount
Package / Case	8-SMD, Gull Wing
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the HCPL-4503#520 are qualified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Single channel configuration
Isolation voltage rating of 5000Vrms or higher
Transistor output type
DC input type
Operating temperature range of -55°C to 100°C
8-pin surface mount gull wing package
Current output capability of 8mA per channel
Maximum forward current rating of 25mA

Substitution Logic: Parts meeting all primary criteria are classified as direct substitutes. The Renesas Electronics PS8502 series (PS8502L2-AX, PS8502L2-E3-AX, PS8502L2-V-AX, PS8502L2-V-E3-AX, PS8502L3-E3-AX, PS8502L3-V-E3-AX) and Vishay Semiconductor SFH6345 series (SFH6345-X007, SFH6345-X007T, SFH6345-X009, SFH6345-X009T) meet these requirements. Packaging variations (Tube vs. Tape & Reel) and RoHS compliance status do not affect electrical substitution eligibility but may impact procurement and assembly workflows.

Parameter Comparison

Parameter	HCPL-4503#520	PS8502L2-AX	PS8502L2-E3-AX	PS8502L2-V-AX	PS8502L2-V-E3-AX	PS8502L3-E3-AX	PS8502L3-V-E3-AX	SFH6345-X007	SFH6345-X007T	SFH6345-X009	SFH6345-X009T
Manufacturer	Broadcom Limited	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Renesas Electronics	Vishay Semiconductor	Vishay Semiconductor	Vishay Semiconductor	Vishay Semiconductor
Number of Channels	1	1	1	1	1	1	1	1	1	1	1
Voltage - Isolation	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5000Vrms	5300Vrms	5300Vrms	5300Vrms	5300Vrms
Output Type	Transistor	Transistor	Transistor	Transistor with Base	Transistor	Transistor	Transistor with Base	Transistor	Transistor	Transistor	Transistor
Input Type	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC
Current Transfer Ratio (Min)	19% @ 16mA	15% @ 16mA	15% @ 16mA	15% @ 16mA	15% @ 16mA	15% @ 16mA	15% @ 16mA	19% @ 16mA	19% @ 16mA	19% @ 16mA	19% @ 16mA
Voltage - Output (Max)	20V	35V	35V	35V	35V	35V	35V	25V	25V	25V	25V
Current - Output / Channel	8mA	8mA	8mA	8mA	8mA	8mA	8mA	8mA	8mA	8mA	8mA
Voltage - Forward (Vf) (Typ)	1.5V	1.7V	1.7V	1.7V	1.7V	1.7V	1.7V	1.33V	1.33V	1.33V	1.33V
Current - DC Forward (If) (Max)	25mA	25mA	25mA	25mA	25mA	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	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C	-55°C ~ 100°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing	8-SMD, Gull Wing
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts listed maintain active product status with continuous manufacturing support. The Renesas Electronics PS8502 series offers ROHS3 compliance across all variants, addressing regulatory requirements for new designs. The Vishay Semiconductor SFH6345 series similarly provides ROHS3 compliance with higher isolation voltage rating (5300Vrms vs. 5000Vrms), offering additional safety margin in high-voltage isolation circuits.

Packaging selection between Tube and Tape & Reel (TR) variants affects procurement logistics and assembly automation compatibility. Tube packaging (PS8502L2-AX, PS8502L2-V-AX, SFH6345-X007, SFH6345-X009) suits lower-volume or manual assembly operations. Tape & Reel variants (PS8502L2-E3-AX, PS8502L2-V-E3-AX, PS8502L3-E3-AX, PS8502L3-V-E3-AX, SFH6345-X007T, SFH6345-X009T) integrate with automated pick-and-place equipment for high-volume production.

Output configuration differences exist between standard transistor output and transistor-with-base variants. PS8502L2-V-AX, PS8502L2-V-E3-AX, and PS8502L3-V-E3-AX provide base output access, enabling additional circuit design flexibility. Standard transistor output variants (PS8502L2-AX, PS8502L2-E3-AX, PS8502L3-E3-AX, SFH6345-X007, SFH6345-X007T, SFH6345-X009, SFH6345-X009T) maintain direct functional equivalence to the HCPL-4503#520.

Frequently Asked Questions (FAQ)

Q: Can PS8502 series parts directly replace HCPL-4503#520 in existing designs?

A: Yes. PS8502 series parts meet all critical substitution parameters: 5000Vrms isolation, single-channel transistor output, 8-pin gull wing package, 8mA output current, and -55°C to 100°C operating range. Higher maximum output voltage (35V vs. 20V) and lower minimum current transfer ratio (15% vs. 19%) require circuit verification to confirm adequate performance margins.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging contains loose components suitable for manual assembly or low-volume production. Tape & Reel packaging presents components on continuous carrier tape compatible with automated assembly equipment. Electrical performance is identical; selection depends on manufacturing process requirements.

Q: Why do some substitute parts have "transistor with base" output configuration?

A: Transistor-with-base variants (PS8502L2-V-AX, PS8502L2-V-E3-AX, PS8502L3-V-E3-AX) expose the base terminal for external circuit control, enabling advanced switching applications. Standard transistor output variants provide simpler two-terminal output suitable for direct load switching. Both configurations are electrically compatible with HCPL-4503#520 in standard applications.

Q: How does the higher isolation voltage of SFH6345 series (5300Vrms) affect substitution?

A: Higher isolation voltage provides additional safety margin and noise immunity in high-voltage isolation circuits. SFH6345 series parts are direct substitutes where 5000Vrms isolation is specified. No circuit modifications are required; the higher rating ensures equivalent or improved performance.

Q: What is the impact of RoHS compliance differences?

A: HCPL-4503#520 is RoHS non-compliant; all substitute parts are ROHS3 compliant. For new designs or applications with RoHS requirements, substitute parts ensure regulatory compliance. Existing designs using HCPL-4503#520 may continue operation; substitution is optional unless regulatory mandates apply.

Q: Are there differences in current transfer ratio between the main part and substitutes?

A: HCPL-4503#520 specifies 19% to 50% current transfer ratio at 16mA. Renesas PS8502 series specifies 15% minimum (maximum not specified). Vishay SFH6345 series specifies 19% minimum (maximum not specified). Lower minimum CTR in PS8502 variants requires circuit analysis to confirm adequate output current under worst-case conditions.

Q: Can I mix substitute parts from different manufacturers in the same design?

A: Yes. All listed substitutes meet identical isolation voltage, channel count, output type, and thermal specifications. However, minor differences in current transfer ratio, forward voltage, and output voltage ratings may affect circuit performance. Consistent part selection within a single design is recommended for predictable behavior.

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