HC8LP-100-R Equivalent & Substitute Parts

Part Overview

The HC8LP-100-R is a 10 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 4.3 A continuous current with a maximum DC resistance of 62.9 mOhm and operates across the temperature range of -40°C to 155°C. The part is ROHS3 compliant and carries an active product status with 676 pieces currently in stock. Substitute parts are identified when equivalent inductance values, current ratings, and thermal operating ranges meet or exceed the original specification requirements while maintaining compatible package dimensions and mounting characteristics.

Substiute Parts

HC8LP-100-R

Eaton - Electronics DivisionIn Stock: 726HC8LP-100-R Datasheet

Current PartRFQ

SRP1038A-100M

Bourns Inc.In Stock: 72869SRP1038A-100M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HC8LP-100-R is determined by the following critical parameters:

Inductance Value: The substitute part must maintain 10 µH inductance with ±20% tolerance to ensure circuit performance equivalence.

Current Rating: The substitute part must support a minimum continuous current rating of 4.3 A. Parts with higher current ratings provide additional design margin and are acceptable substitutes.

DC Resistance: The substitute part must not exceed 62.9 mOhm maximum DC resistance to maintain equivalent power dissipation characteristics.

Operating Temperature Range: The substitute part must support the full operating range of -40°C to 155°C or demonstrate compatibility within the application's thermal requirements.

Mounting and Package Compatibility: The substitute part must be surface mount with dimensions compatible to the original package footprint (approximately 10.90mm x 10.40mm length and width, with height not exceeding 3.50mm seated height).

Compliance and Status: The substitute part must maintain ROHS3 compliance and active product status to ensure long-term availability and regulatory alignment.

The SRP1038A-100M meets these substitution criteria with equivalent inductance, superior current rating (7.5 A), lower DC resistance (30 mOhm), and compatible surface mount package dimensions.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection - HC8LP-100-R (Eaton): Select this part when the original design specifications require unshielded construction, the maximum operating temperature of 155°C is critical, and the compact 3.50mm seated height is a board layout constraint. This part maintains active product status with established supply availability (676 pieces in stock).

Substitute Selection - SRP1038A-100M (Bourns): Select this part when design requirements permit shielded construction, the 150°C maximum operating temperature is acceptable, and the additional 0.50mm height (4.00mm seated) does not conflict with board layout. The SRP1038A-100M provides superior electrical performance with 7.5 A current rating versus 4.3 A, lower DC resistance (30 mOhm versus 62.9 mOhm), and higher saturation current (12 A versus 3.8 A). Both parts maintain ROHS3 compliance and active product status. The substitute part demonstrates higher inventory availability (72,800 pieces in stock) and includes AEC-Q200 automotive qualification.

Thermal Consideration: The HC8LP-100-R supports operation to 155°C, while the SRP1038A-100M is rated to 150°C. Applications requiring sustained operation above 150°C must retain the original HC8LP-100-R specification.

Shielding Consideration: The HC8LP-100-R is unshielded, while the SRP1038A-100M is shielded. Shielded construction in the substitute part reduces electromagnetic interference emission and susceptibility, which may be beneficial in noise-sensitive applications but is not required for direct functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can the SRP1038A-100M directly replace the HC8LP-100-R in all applications?

A: The SRP1038A-100M is functionally equivalent for inductance value (10 µH) and meets or exceeds all critical electrical parameters. However, two design considerations apply: (1) The maximum operating temperature is 150°C versus 155°C for the original part; applications requiring sustained operation above 150°C must use the HC8LP-100-R. (2) The seated height increases from 3.50mm to 4.00mm; board layouts with tight vertical clearance constraints must verify the additional 0.50mm is accommodated.

Q: What is the significance of the different core materials (Iron Powder versus Carbonyl Powder)?

A: The HC8LP-100-R uses iron powder core material, while the SRP1038A-100M uses carbonyl powder. Both materials support the specified 10 µH inductance and ±20% tolerance. The carbonyl powder core in the substitute part contributes to lower DC resistance (30 mOhm versus 62.9 mOhm) and higher saturation current (12 A versus 3.8 A), resulting in improved thermal performance and current handling capability.

Q: Why is the substitute part shielded while the original is unshielded?

A: The SRP1038A-100M incorporates shielding as a design feature that reduces electromagnetic field radiation and improves immunity to external electromagnetic interference. For applications where unshielded construction is specifically required to avoid shielding effects on circuit behavior, the HC8LP-100-R must be retained. For most general-purpose applications, shielded construction is compatible and often beneficial.

Q: Are there any compliance or certification differences between these parts?

A: Both parts are ROHS3 compliant and carry active product status. The SRP1038A-100M includes AEC-Q200 automotive qualification, which is an additional certification not specified for the HC8LP-100-R. AEC-Q200 qualification indicates the part meets automotive industry reliability and quality standards. This additional qualification does not prevent use in non-automotive applications.

Q: What is the impact of lower DC resistance in the substitute part?

A: The SRP1038A-100M has a maximum DC resistance of 30 mOhm compared to 62.9 mOhm for the HC8LP-100-R. Lower DC resistance reduces resistive power dissipation (I²R losses) during operation. For a 4.3 A load, the HC8LP-100-R dissipates approximately 1.16 W, while the SRP1038A-100M dissipates approximately 0.56 W. This improvement reduces thermal stress on the component and surrounding circuitry.

Q: Can the substitute part be used in applications where the original part is currently in production?

A: Yes, provided the thermal and dimensional constraints identified in this document are satisfied. Both parts maintain active product status and ROHS3 compliance. Design validation should confirm that the 150°C maximum operating temperature and 4.00mm seated height are compatible with the application's thermal environment and board layout. The superior electrical performance of the substitute part (higher current rating, lower DC resistance) typically provides additional design margin.

Q: What inventory considerations apply to these parts?

A: The HC8LP-100-R has 676 pieces in stock, while the SRP1038A-100M has 72,800 pieces in stock. The substitute part demonstrates significantly higher inventory availability, which may reduce lead times and supply chain risk for new designs or production volume increases.