HCPL2503SV Equivalent & Substitute Parts

Part Overview

The HCPL2503SV is an optoisolator transistor with base output manufactured by onsemi, rated for 2500Vrms isolation voltage in a single-channel 8-SMD surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The HCPL2503SV provides DC input with transistor output including base connection, suitable for applications requiring galvanic isolation with moderate voltage ratings.

Key Parameters

Parameter	HCPL2503SV
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
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	Surface Mount
Package / Case	8-SMD, Gull Wing
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the HCPL2503SV are grouped based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

Number of Channels: 1 (single channel required)
Output Type: Transistor with Base (base connection required for circuit compatibility)
Mounting Type: Surface Mount (PCB assembly compatibility)
Package / Case: 8-SMD, Gull Wing (footprint compatibility)
Voltage - Output (Max): 20V (output voltage rating)
Current - Output / Channel: 8mA (output current capability)
Input Type: DC (input signal type)

Isolation Voltage Consideration: Substitute parts with isolation voltage ratings equal to or greater than 2500Vrms maintain or exceed the original specification. Parts rated at 3750Vrms and 5000Vrms provide enhanced isolation margin and are functionally compatible for applications designed for the HCPL2503SV.

Current Transfer Ratio: The HCPL2503SV specifies a minimum CTR of 12% @ 16mA. Substitute parts with specified CTR values at or above this threshold ensure equivalent or superior signal transfer characteristics.

Parameter Comparison

Parameter	HCPL2503SV	HCPL-4504#300	HCPL-4562-300E	HCPL-4562-500E	HCPL-4562-520E	HCPL-J454-400E	HCPL-J454-600E
Manufacturer	onsemi	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited	Broadcom Limited
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Number of Channels	1	1	1	1	1	1	1
Voltage - Isolation	2500Vrms	3750Vrms	3750Vrms	3750Vrms	5000Vrms	3750Vrms	3750Vrms
Current Transfer Ratio (Min)	12% @ 16mA	25% @ 16mA	—	—	—	19% @ 16mA	19% @ 16mA
Current Transfer Ratio (Max)	—	60% @ 16mA	—	—	—	60% @ 16mA	60% @ 16mA
Turn On / Turn Off Time (Typ)	450ns, 300ns	200ns, 300ns	—	—	—	500ns, 800ns	500ns, 800ns
Output Type	Transistor with Base	Transistor	Transistor with Base	Transistor with Base	Transistor with Base	Transistor	Transistor
Voltage - Output (Max)	20V	20V	20V	20V	20V	20V	20V
Current - Output / Channel	8mA	8mA	8mA	8mA	8mA	8mA	8mA
Voltage - Forward (Vf) (Typ)	1.45V	1.5V	1.3V	1.3V	1.3V	1.59V	1.59V
Current - DC Forward (If) (Max)	25mA	25mA	12mA	12mA	12mA	25mA	25mA
Operating Temperature	-55°C ~ 100°C	-55°C ~ 100°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°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
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
RoHS Status	—	RoHS non-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)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Primary Substitutes with Base Output (Direct Functional Equivalents):

The HCPL-4562 series (HCPL-4562-300E, HCPL-4562-500E, HCPL-4562-520E) are the most direct functional equivalents, maintaining the transistor with base output configuration required for circuits designed around the HCPL2503SV. All three variants are manufactured by Broadcom Limited with active product status and ROHS3 compliance. These parts provide isolation voltage ratings of 3750Vrms to 5000Vrms, exceeding the original 2500Vrms specification. Operating temperature range is -40°C to 85°C, which is narrower than the original -55°C to 100°C range; applications requiring the full original temperature range should be evaluated accordingly.

Secondary Substitutes without Base Output:

The HCPL-4504#300 and HCPL-J454 series (HCPL-J454-400E, HCPL-J454-600E) provide transistor output without base connection. These parts are suitable only for applications where the base connection is not required by the circuit design. HCPL-4504#300 carries RoHS non-compliant status, while HCPL-J454 variants are ROHS3 compliant. HCPL-J454 parts maintain the full -55°C to 100°C operating temperature range of the original component.

Compliance Considerations:

For new designs subject to RoHS3 requirements, the HCPL-4562 series and HCPL-J454 series are compliant. HCPL-4504#300 is not RoHS compliant and should be avoided in applications with regulatory compliance mandates.

Frequently Asked Questions (FAQ)

Q: Can HCPL-4562-300E, HCPL-4562-500E, and HCPL-4562-520E be used interchangeably as substitutes for HCPL2503SV?

A: Yes, all three HCPL-4562 variants maintain the transistor with base output configuration and are functionally compatible. The primary difference is isolation voltage rating: HCPL-4562-300E and HCPL-4562-500E are rated at 3750Vrms, while HCPL-4562-520E is rated at 5000Vrms. All exceed the original 2500Vrms specification. Selection depends on packaging requirements (tube, cut tape, or tape & reel) and inventory availability.

Q: Why do HCPL-4504#300 and HCPL-J454 series not have base output?

A: These parts are designed with transistor output only, without the base connection. They are not direct functional equivalents for circuits requiring base access. Use these only if your circuit design does not depend on base connection functionality.

Q: What is the impact of the narrower operating temperature range in HCPL-4562 parts?

A: HCPL-4562 series operates from -40°C to 85°C, compared to the original HCPL2503SV range of -55°C to 100°C. Applications requiring operation below -40°C or above 85°C must use HCPL-J454 variants, which maintain the full -55°C to 100°C range.

Q: Are all substitute parts in the same 8-SMD package?

A: Yes, all substitute parts listed use 8-SMD, Gull Wing packaging, ensuring PCB footprint compatibility with the original HCPL2503SV design.

Q: What is the significance of RoHS compliance status?

A: HCPL-4562 series and HCPL-J454 series are ROHS3 compliant, meeting current environmental and regulatory standards. HCPL-4504#300 is RoHS non-compliant and should not be used in applications subject to RoHS3 requirements.

Q: How do current transfer ratios compare across substitute parts?

A: The original HCPL2503SV specifies a minimum CTR of 12% @ 16mA. HCPL-4504#300 provides 25% minimum CTR, and HCPL-J454 variants provide 19% minimum CTR, both exceeding the original specification. HCPL-4562 series does not specify CTR values in the provided data.

Q: Can I use HCPL-J454-600E instead of HCPL-J454-400E?

A: Yes, both variants are electrically identical with the same electrical specifications. The difference is packaging: HCPL-J454-400E is supplied in tube packaging, while HCPL-J454-600E is supplied in tape & reel format. Selection depends on your procurement and assembly process requirements.

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