HCPL-2503 Equivalent & Substitute Parts

Part Overview

The HCPL-2503 is an optoisolator transistor with base output manufactured by Broadcom Limited, designed for high-voltage isolation applications. This 8-DIP through-hole component provides 3750Vrms isolation with a single channel and DC input configuration. The part is currently active in production with 5510 units in stock. Alternative models may be required due to component availability, compliance requirements, or specific application parameters that demand different electrical characteristics.

Substiute Parts

HCPL-2503

Broadcom LimitedIn Stock: 5618HCPL-2503 Datasheet

Current PartRFQ

HCPL-2503-000E

Broadcom LimitedIn Stock: 2824HCPL-2503-000E Datasheet

Parametric EquivalentRFQ

HCPL4503M

onsemiIn Stock: 6122HCPL4503M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HCPL-2503 are classified based on the following substitution criteria:

Parametric Equivalent Classification: Parts that maintain identical or functionally equivalent electrical and mechanical specifications, allowing direct replacement without circuit modification.

Manufacturer Recommended Classification: Parts that offer enhanced or alternative specifications while maintaining the same package footprint and basic functional topology, suitable for applications requiring improved performance characteristics.

The primary parameters determining substitution eligibility are:

• Number of Channels (must be 1)
• Output Type (must be Transistor with Base)
• Package / Case (must be 8-DIP, 0.300", 7.62mm)
• Mounting Type (must be Through Hole)
• Input Type (must be DC)

Secondary parameters that may vary within acceptable substitution ranges:

• Voltage - Isolation (minimum 3750Vrms required)
• Current Transfer Ratio (minimum 15% @ 8mA required)
• Operating Temperature range
• RoHS compliance status
• Voltage - Output (Max)
• Turn On / Turn Off Time

Parameter Comparison

Engineering Selection Recommendations

HCPL-2503-000E (Parametric Equivalent): This Broadcom Limited part is electrically and mechanically identical to the HCPL-2503, with all key parameters matching exactly. The primary distinction is RoHS3 compliance status. Selection of this part is appropriate when RoHS compliance is required for the end application or supply chain requirements. Both parts share identical isolation voltage, current transfer ratio, switching times, and operating temperature range.

HCPL4503M (Manufacturer Recommended Alternative): This onsemi part offers enhanced specifications across multiple parameters while maintaining the same 8-DIP through-hole package. The HCPL4503M provides 5000Vrms isolation (compared to 3750Vrms), higher current transfer ratio range (19% to 50% @ 16mA), faster switching times (250ns/260ns), and higher maximum output voltage (20V). This part is suitable for applications requiring higher isolation voltage or improved switching performance. Both substitute parts and the main part are RoHS3 compliant and active in production. The HCPL4503M has a narrower operating temperature range (-40°C to 100°C versus -55°C to 100°C), which should be verified against application requirements.

Frequently Asked Questions (FAQ)

Q: Can HCPL-2503-000E be used as a direct replacement for HCPL-2503?

A: Yes. The HCPL-2503-000E is a parametric equivalent with identical electrical and mechanical specifications. All key parameters including isolation voltage (3750Vrms), current transfer ratio (15% @ 8mA), switching times (1µs, 1.5µs), and package configuration (8-DIP through-hole) are identical. The primary difference is RoHS3 compliance status.

Q: What are the key differences between HCPL-2503 and HCPL4503M?

A: The HCPL4503M offers enhanced specifications: 5000Vrms isolation (versus 3750Vrms), current transfer ratio range of 19% to 50% @ 16mA (versus 15% @ 8mA minimum), faster switching times (250ns/260ns versus 1µs/1.5µs), and higher maximum output voltage (20V versus 7V). Both maintain the same 8-DIP through-hole package. The HCPL4503M has a narrower operating temperature range (-40°C to 100°C).

Q: Are all substitute parts available in the same package?

A: Yes. All three parts use the 8-DIP (0.300", 7.62mm) through-hole package, enabling direct board-level substitution without layout modifications.

Q: Which substitute part should be selected for RoHS-compliant applications?

A: Both HCPL-2503-000E and HCPL4503M are ROHS3 compliant. The HCPL-2503-000E maintains identical specifications to the original part, while HCPL4503M offers enhanced performance characteristics.

Q: What is the minimum isolation voltage requirement for substitution?

A: The minimum isolation voltage for substitution is 3750Vrms, matching the original HCPL-2503 specification. The HCPL4503M exceeds this requirement at 5000Vrms.

Q: Can HCPL4503M be used in applications with operating temperatures below -40°C?

A: No. The HCPL4503M operating temperature range is -40°C to 100°C. Applications requiring operation below -40°C must use HCPL-2503 or HCPL-2503-000E, which are rated to -55°C.