HCPL2503W Equivalent & Substitute Parts

Part Overview

The HCPL2503W is an optoisolator transistor with base output manufactured by onsemi, rated for 2500Vrms isolation voltage in a single-channel 8-DIP package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The HCPL2503W provides DC input with transistor output including base connection, suitable for applications requiring galvanic isolation with moderate voltage ratings.

Key Parameters

Parameter	HCPL2503W
Manufacturer	onsemi
Product Status	Obsolete
Number of Channels	1
Voltage - Isolation	2500Vrms
Current Transfer Ratio (Min)	12% @ 16mA
Turn On / Turn Off Time (Typ)	450ns, 300ns
Input Type	DC
Output Type	Transistor with Base
Voltage - Output (Max)	20V
Current - Output / Channel	8mA
Voltage - Forward (Vf) (Typ)	1.45V
Current - DC Forward (If) (Max)	25mA
Operating Temperature	-55°C ~ 100°C
Mounting Type	Through Hole
Package / Case	8-DIP (0.400", 10.16mm)
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the HCPL2503W are qualified based on the following criteria:

Functional Compatibility Requirements:

Single-channel optoisolator configuration
Transistor output with base connection
DC input type
Through-hole mounting in 8-DIP package
Maximum output voltage of 20V
Output current capability of 8mA per channel
Moisture Sensitivity Level 1 (Unlimited)

Electrical Compatibility Considerations:

Isolation voltage rating must meet or exceed 2500Vrms
Forward voltage (Vf) and forward current (If) characteristics must be compatible with input drive circuits
Operating temperature range must support the application environment

The HCPL-4562 series from Broadcom Limited meets these functional requirements with enhanced isolation voltage ratings (3750Vrms to 5000Vrms), providing superior performance margins for applications originally designed around the HCPL2503W.

Parameter Comparison

Parameter	HCPL2503W	HCPL-4562	HCPL-4562-000E	HCPL-4562-020E	HCPL-4562-060E
Manufacturer	onsemi	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited
Product Status	Obsolete	Active	Active	Active	Active
Number of Channels	1	1	1	1	1
Voltage - Isolation	2500Vrms	3750Vrms	3750Vrms	5000Vrms	3750Vrms
Input Type	DC	DC	DC	DC	DC
Output Type	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base	Transistor with Base
Voltage - Output (Max)	20V	20V	20V	20V	20V
Current - Output / Channel	8mA	8mA	8mA	8mA	8mA
Voltage - Forward (Vf) (Typ)	1.45V	1.3V	1.3V	1.3V	1.3V
Current - DC Forward (If) (Max)	25mA	12mA	12mA	12mA	12mA
Operating Temperature	-55°C ~ 100°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	8-DIP (0.400", 10.16mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed are active products from Broadcom Limited with ROHS3 compliance, providing regulatory advantage over the obsolete HCPL2503W. The HCPL-4562 series maintains functional equivalence through identical output characteristics (20V maximum, 8mA per channel) and DC input operation.

HCPL-4562 (standard packaging) and HCPL-4562-000E (tube packaging) both provide 3750Vrms isolation, exceeding the HCPL2503W requirement by 50%. These variants are suitable for applications where the original isolation voltage margin is adequate.

HCPL-4562-020E provides 5000Vrms isolation, offering maximum voltage margin for demanding isolation applications. This variant is appropriate when enhanced isolation performance is required.

HCPL-4562-060E (tube packaging) provides 3750Vrms isolation with tube packaging format, matching the HCPL-4562-000E electrical specification.

Package dimensions differ between the HCPL2503W (0.400" width) and all HCPL-4562 variants (0.300" width). PCB layout modifications are required for physical substitution.

Frequently Asked Questions (FAQ)

Q: Can HCPL-4562 series parts directly replace HCPL2503W without circuit modification?

A: Electrical substitution is possible due to matching output voltage (20V max), output current (8mA), and DC input operation. However, physical substitution requires PCB layout changes due to different package widths (0.400" vs 0.300"). Input drive circuit modifications may be necessary due to lower forward current rating (12mA vs 25mA maximum).

Q: What is the difference between HCPL-4562, HCPL-4562-000E, HCPL-4562-020E, and HCPL-4562-060E?

A: HCPL-4562 is supplied in standard packaging. HCPL-4562-000E and HCPL-4562-060E are tube-packaged variants with 3750Vrms isolation. HCPL-4562-020E is tube-packaged with 5000Vrms isolation. All variants share identical electrical output characteristics.

Q: Is the reduced operating temperature range (-40°C to 85°C vs -55°C to 100°C) a concern?

A: The HCPL-4562 series operating range is narrower than the HCPL2503W. Applications requiring operation below -40°C or above 85°C must verify compatibility with the substitute part's temperature specification.

Q: Why is the forward current rating lower on HCPL-4562 variants (12mA vs 25mA)?

A: The HCPL-4562 series has a lower maximum forward current specification. Input drive circuits must be designed to operate within the 12mA maximum limit. This may require resistor value adjustments in the input circuit.

Q: Are all substitute parts RoHS compliant?

A: Yes. All HCPL-4562 series variants are ROHS3 compliant, providing environmental and regulatory compliance advantages over the obsolete HCPL2503W.

Q: Which substitute part should be selected for new designs?

A: Selection depends on isolation voltage requirements. HCPL-4562-000E or HCPL-4562-060E (3750Vrms) are suitable for applications matching the original 2500Vrms specification with margin. HCPL-4562-020E (5000Vrms) is appropriate for applications requiring maximum isolation performance.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message