HCPL-4503#500 Equivalent & Substitute Parts Reference

Part Overview

The HCPL-4503#500 is an optoisolator with transistor output manufactured by Broadcom Limited, rated for 3750Vrms isolation voltage in a single-channel configuration. This component is designed for DC input applications requiring galvanic isolation with transistor-based switching output. The part is currently active in production status with 725 units in stock. Substitute parts are identified to address packaging availability, compliance requirements, or enhanced electrical performance specifications.

Key Parameters

Parameter	Value
Manufacturer	Broadcom Limited
Part Number	HCPL-4503#500
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	3750Vrms
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	Surface Mount
Package / Case	8-SMD, Gull Wing
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Isolation Voltage: Minimum 3750Vrms (equal or higher acceptable)
Number of Channels: Must be 1 channel
Output Type: Transistor output configuration
Input Type: DC input
Current - Output / Channel: 8mA
Operating Temperature Range: -55°C ~ 100°C minimum
Mounting Type: Surface Mount
Package / Case: 8-SMD, Gull Wing

Substitute parts are grouped into three categories:

Direct Substitutes (Identical Electrical Performance): Parts with matching isolation voltage (3750Vrms), identical current transfer ratio range, and equivalent switching characteristics.

Parametric Equivalents (Enhanced Performance): Parts with higher isolation voltage (5000Vrms or 5300Vrms) that maintain all critical output parameters, allowing direct replacement with improved isolation margin.

Manufacturer Recommended Alternatives: Parts from alternative manufacturers (Renesas Electronics, Vishay Semiconductor) meeting or exceeding all electrical specifications with different packaging options.

Parameter Comparison

Part Number	Manufacturer	Isolation Voltage	CTR Min @ 16mA	Turn On / Turn Off Time (Typ)	Voltage - Output (Max)	Vf (Typ)	Packaging	RoHS Status	Inventory
HCPL-4503#500	Broadcom Limited	3750Vrms	19%	200ns, 600ns	20V	1.5V	Tape & Reel (TR)	RoHS non-compliant	725 Pcs
HCPL-4503-500E	Broadcom Limited	3750Vrms	19%	200ns, 600ns	20V	1.5V	Cut Tape (CT) & Digi-Reel®	ROHS3 Compliant	2100 Pcs
HCPL-4502-500E	Broadcom Limited	3750Vrms	19%	200ns, 600ns	20V	1.5V	Tape & Reel (TR)	ROHS3 Compliant	1725 Pcs
PS8502L2-AX	Renesas Electronics Corporation	5000Vrms	15%	220ns, 350ns	35V	1.7V	Tube	ROHS3 Compliant	1645 Pcs
PS8502L2-E3-AX	Renesas Electronics Corporation	5000Vrms	15%	220ns, 350ns	35V	1.7V	Tape & Reel (TR)	ROHS3 Compliant	1525 Pcs
PS8502L2-V-AX	Renesas Electronics Corporation	5000Vrms	15%	—	35V	1.7V	Tube	ROHS3 Compliant	1890 Pcs
PS8502L2-V-E3-AX	Renesas Electronics Corporation	5000Vrms	15%	220ns, 350ns	35V	1.7V	Tape & Reel (TR)	ROHS3 Compliant	1745 Pcs
PS8502L3-E3-AX	Renesas Electronics Corporation	5000Vrms	15%	220ns, 350ns	35V	1.7V	Tape & Reel (TR)	ROHS3 Compliant	3400 Pcs
PS8502L3-V-E3-AX	Renesas Electronics Corporation	5000Vrms	15%	—	35V	1.7V	Tape & Reel (TR)	ROHS3 Compliant	1927 Pcs
SFH6345-X007	Vishay Semiconductor Opto Division	5300Vrms	19%	300ns, 300ns	25V	1.33V	Tube	ROHS3 Compliant	4646 Pcs
SFH6345-X007T	Vishay Semiconductor Opto Division	5300Vrms	19%	300ns, 300ns	25V	1.33V	Tape & Reel (TR)	ROHS3 Compliant	1716 Pcs

Engineering Selection Recommendations

For RoHS3 Compliance Requirement: Select HCPL-4503-500E or HCPL-4502-500E. Both are Broadcom Limited products with ROHS3 compliant status, maintaining identical electrical specifications to the original HCPL-4503#500. HCPL-4503-500E offers higher inventory availability (2100 units) with Cut Tape and Digi-Reel packaging options.

For Enhanced Isolation Voltage with Broadcom Sourcing: HCPL-4502-500E provides 3750Vrms isolation in ROHS3 compliant packaging with Tape & Reel format and 1725 units in stock.

For Higher Isolation Voltage (5000Vrms) with Renesas Electronics: PS8502L2-E3-AX or PS8502L3-E3-AX are recommended. Both feature 5000Vrms isolation, ROHS3 compliance, and Tape & Reel packaging. PS8502L3-E3-AX has superior inventory availability (3400 units). These parts accept higher output voltage (35V vs 20V) and maintain 8mA output current specification.

For Higher Isolation Voltage (5300Vrms) with Vishay Semiconductor: SFH6345-X007T provides 5300Vrms isolation, ROHS3 compliance, and Tape & Reel packaging with 1716 units in stock. This part matches the original 19% minimum current transfer ratio and offers lower forward voltage (1.33V vs 1.5V).

For Tube Packaging Format: PS8502L2-AX (Renesas, 1645 units) or SFH6345-X007 (Vishay, 4646 units) are available with 5000Vrms and 5300Vrms isolation respectively.

Frequently Asked Questions (FAQ)

Q: Can HCPL-4503-500E directly replace HCPL-4503#500?

A: Yes. HCPL-4503-500E is a direct substitute with identical electrical specifications (3750Vrms isolation, 19% minimum CTR, 200ns/600ns switching times). The primary difference is packaging format (Cut Tape & Digi-Reel vs Tape & Reel) and RoHS3 compliance status. Both are Broadcom Limited products with the same base part number HCPL-4503.

Q: What is the difference between HCPL-4502-500E and HCPL-4503-500E?

A: Both parts share identical electrical specifications and RoHS3 compliance. The difference is the base part number designation (HCPL-4502 vs HCPL-4503). Both are suitable substitutes for HCPL-4503#500 with equivalent performance characteristics.

Q: Can Renesas PS8502 series parts replace the Broadcom HCPL-4503#500?

A: Yes, with design considerations. PS8502 series parts provide higher isolation voltage (5000Vrms vs 3750Vrms), higher maximum output voltage (35V vs 20V), and ROHS3 compliance. The minimum current transfer ratio is lower (15% vs 19%), and switching times differ slightly (220ns/350ns vs 200ns/600ns). These parts are electrically compatible for applications where the enhanced isolation voltage is acceptable.

Q: Can Vishay SFH6345-X007 series parts replace the Broadcom HCPL-4503#500?

A: Yes. SFH6345-X007 and SFH6345-X007T provide 5300Vrms isolation, matching the original 19% minimum current transfer ratio, with ROHS3 compliance. Maximum output voltage is 25V (vs 20V), and forward voltage is lower (1.33V vs 1.5V). Switching times are 300ns for both turn-on and turn-off (vs 200ns/600ns).

Q: What packaging options are available for substitutes?

A: Tape & Reel (TR) format is available across all substitute families. Cut Tape & Digi-Reel format is available for HCPL-4503-500E. Tube packaging is available for PS8502L2-AX, PS8502L2-V-AX, and SFH6345-X007.

Q: Which substitute has the highest inventory availability?

A: SFH6345-X007 (Vishay Semiconductor) has 4646 units in stock, followed by PS8502L3-E3-AX (Renesas Electronics) with 3400 units.

Q: Are all substitutes RoHS3 compliant?

A: All substitute parts listed are ROHS3 compliant. The original HCPL-4503#500 is RoHS non-compliant. For RoHS3 compliance requirements, select HCPL-4503-500E, HCPL-4502-500E, or any Renesas or Vishay alternative.

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