HCPL-4503-320E Equivalent & Substitute Parts

Part Overview

The HCPL-4503-320E is an optoisolator transistor output device manufactured by Broadcom Limited, designed for high-voltage isolation applications requiring 5000Vrms isolation rating. This single-channel optoisolator operates with DC input and transistor output configuration, housed in an 8-DIP Gull Wing surface mount package. The device is currently in active production status with 1036 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within the specified parameter ranges.

Key Parameters

Parameter	Value
Manufacturer Part Number	HCPL-4503-320E
Manufacturer	Broadcom Limited
Category	Optoisolators
Number of Channels	1
Voltage - Isolation	5000Vrms
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	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the HCPL-4503-320E are qualified based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

Voltage - Isolation: Minimum 5000Vrms (equal or higher)
Number of Channels: 1 channel
Input Type: DC
Output Type: Transistor or Transistor with Base
Current - Output / Channel: 8mA
Operating Temperature Range: -55°C ~ 100°C minimum
Mounting Type: Surface Mount
Package / Case: 8-SMD, Gull Wing
RoHS Status: ROHS3 Compliant
Product Status: Active

Acceptable Parameter Variations:

Current Transfer Ratio (Min): 15% or higher @ 16mA
Voltage - Output (Max): 20V or higher
Voltage - Forward (Vf) (Typ): 1.33V to 1.7V
Turn On / Turn Off Time: Within application timing requirements

Renesas Electronics Corporation PS8502 series parts meet all primary criteria with higher maximum output voltage (35V) and equivalent isolation rating. Vishay Semiconductor Opto Division SFH6345 series parts exceed isolation requirements (5300Vrms) with matching current transfer ratio minimums and equivalent output specifications.

Parameter Comparison

Parameter	HCPL-4503-320E	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
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
Turn On / Turn Off Time (Typ)	200ns, 600ns	220ns, 350ns	220ns, 350ns	—	220ns, 350ns	220ns, 350ns	—	300ns, 300ns	300ns, 300ns	300ns, 300ns	300ns, 300ns
Input Type	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC	DC
Output Type	Transistor	Transistor	Transistor	Transistor with Base	Transistor	Transistor	Transistor with Base	Transistor	Transistor	Transistor	Transistor
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	ROHS3 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
Packaging	Tube	Tube	Tape & Reel (TR)	Tube	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tube	Tape & Reel (TR)	Tube	Tape & Reel (TR)
Inventory (Pcs)	1036	1645	1525	1890	1745	3400	1927	4646	1716	2543	2400

Engineering Selection Recommendations

All substitute parts listed maintain active product status and ROHS3 compliance equivalent to the HCPL-4503-320E. Selection between substitute options depends on specific application requirements and packaging preferences.

Renesas Electronics PS8502 Series: These parts provide 5000Vrms isolation matching the primary device specification. The PS8502L2 and PS8502L3 variants differ in current transfer ratio binning. Parts designated with "-V-" suffix feature transistor with base output configuration, offering additional design flexibility compared to standard transistor output. Tape & Reel packaging (E3 designation) is available for high-volume production environments, while tube packaging supports lower-volume applications.

Vishay Semiconductor SFH6345 Series: These parts exceed isolation requirements at 5300Vrms and maintain the 19% minimum current transfer ratio matching the HCPL-4503-320E. The SFH6345-X007 and SFH6345-X009 variants provide equivalent electrical performance with different inventory levels. Tape & Reel packaging (T designation) is available for automated assembly processes.

All substitute parts operate across the -55°C to 100°C temperature range, support 8mA output current per channel, and are housed in 8-SMD Gull Wing packages compatible with existing PCB layouts designed for the HCPL-4503-320E.

Frequently Asked Questions (FAQ)

Q: Can PS8502L2-AX replace HCPL-4503-320E directly?

A: Yes. The PS8502L2-AX meets all primary substitution criteria: 5000Vrms isolation, single channel, DC input, transistor output, 8mA output current, -55°C to 100°C operating range, 8-SMD Gull Wing package, and ROHS3 compliance. The 15% minimum current transfer ratio is acceptable for applications designed within the HCPL-4503-320E's 19% to 50% range. Maximum output voltage is higher at 35V versus 20V, providing additional design margin.

Q: What is the difference between PS8502L2-E3-AX and PS8502L2-AX?

A: Both parts are electrically identical. The primary difference is packaging: PS8502L2-AX is supplied in tube packaging for lower-volume applications, while PS8502L2-E3-AX is supplied in Tape & Reel format optimized for automated assembly and higher-volume production runs.

Q: Why do SFH6345 parts have higher isolation voltage (5300Vrms)?

A: The SFH6345 series is designed with enhanced isolation capability. The 5300Vrms rating exceeds the HCPL-4503-320E requirement of 5000Vrms, providing additional safety margin in high-voltage isolation applications. This does not prevent substitution; it represents a higher-specification alternative.

Q: Are PS8502L2-V-AX and PS8502L2-AX interchangeable?

A: Both parts share identical electrical specifications and packaging. The "-V-" designation indicates transistor with base output configuration versus standard transistor output. Interchangeability depends on circuit design: applications requiring base access for additional control must use the "-V-" variant, while standard transistor output applications can use either part.

Q: What packaging options are available for high-volume production?

A: Tape & Reel packaging is available for all substitute series: PS8502L2-E3-AX, PS8502L2-V-E3-AX, PS8502L3-E3-AX, PS8502L3-V-E3-AX from Renesas Electronics, and SFH6345-X007T, SFH6345-X009T from Vishay Semiconductor. Tube packaging is available for lower-volume requirements across all manufacturers.

Q: Do all substitute parts meet the same temperature operating range?

A: Yes. All listed substitute parts operate across -55°C to 100°C, matching the HCPL-4503-320E specification. Moisture sensitivity level is MSL 1 (Unlimited) for all parts, indicating no special storage or handling requirements.

Q: Which substitute has the highest inventory availability?

A: SFH6345-X007 from Vishay Semiconductor has the highest inventory at 4646 units in stock, followed by PS8502L3-E3-AX from Renesas Electronics at 3400 units.

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