HC8LP-8R2-R Equivalent & Substitute Parts

Part Overview

The HC8LP-8R2-R is an 8.2 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 4.5 A continuous current with a maximum DC resistance of 58 mOhm and operates across the temperature range of -40°C to 155°C. The part is classified as Active product status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent inductance values, current ratings, and core materials meet or exceed the electrical performance requirements of the original specification while maintaining compatible package dimensions and mounting characteristics.

Substiute Parts

HC8LP-8R2-R

Eaton - Electronics DivisionIn Stock: 1110HC8LP-8R2-R Datasheet

Current PartRFQ

SRP1038A-8R2M

Bourns Inc.In Stock: 1946SRP1038A-8R2M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HC8LP-8R2-R is determined by the following critical parameters:

Inductance Value: The substitute part must maintain 8.2 µH inductance with ±20% tolerance to ensure circuit functionality.

Current Rating: The substitute must support the required 4.5 A continuous current. Parts with higher current ratings provide additional design margin.

DC Resistance: Lower DC resistance values reduce power dissipation and heat generation. The HC8LP-8R2-R specifies 58 mOhm maximum; substitutes with lower DCR improve efficiency.

Core Material and Shielding: Core material composition (iron powder versus carbonyl powder) and shielding configuration affect electromagnetic interference characteristics and frequency response. Shielded alternatives reduce EMI coupling to adjacent circuits.

Operating Temperature Range: The substitute must support the application temperature envelope. The HC8LP-8R2-R operates from -40°C to 155°C.

Saturation Current: Higher saturation current ratings indicate greater current handling capability before inductance degradation occurs.

Compliance and Certifications: RoHS3 compliance and MSL rating must be maintained or exceeded.

Package Dimensions: Physical size and height must be compatible with PCB layout constraints.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SRP1038A-8R2M (Bourns Inc.)

The SRP1038A-8R2M qualifies as a direct substitute for the HC8LP-8R2-R based on the following engineering criteria:

Electrical Equivalence: Both parts maintain identical 8.2 µH inductance with ±20% tolerance at 100 kHz test frequency. The substitute's higher current rating (8 A versus 4.5 A) and saturation current (12.5 A versus 7.4 A) provide additional design margin without compromising circuit performance.

Resistance Improvement: The SRP1038A-8R2M exhibits significantly lower DC resistance (24 mOhm maximum versus 58 mOhm maximum), resulting in reduced power dissipation and improved thermal performance in the application.

Compliance Status: Both parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, ensuring equivalent environmental and regulatory qualification.

Active Product Status: Both manufacturers classify these parts as Active, confirming ongoing production and supply availability.

Design Considerations: The substitute features shielded construction compared to the original unshielded design. This characteristic reduces electromagnetic interference coupling but may alter frequency response characteristics in sensitive applications. The substitute's operating temperature maximum is 150°C versus 155°C for the original; verify this 5°C difference does not conflict with application requirements. Physical height increases by 0.50 mm (4.00 mm versus 3.50 mm); confirm PCB clearance availability.

Frequently Asked Questions (FAQ)

Q: Can the SRP1038A-8R2M directly replace the HC8LP-8R2-R in all applications?

A: The SRP1038A-8R2M meets the electrical specifications of the HC8LP-8R2-R with improved current handling and lower DC resistance. However, verify three design parameters: (1) the shielded versus unshielded core configuration does not introduce unintended frequency response changes, (2) the 0.50 mm height increase does not violate PCB clearance constraints, and (3) the 5°C reduction in maximum operating temperature (150°C versus 155°C) remains within application limits.

Q: What is the significance of the core material difference between iron powder and carbonyl powder?

A: Core material composition affects permeability, frequency response, and electromagnetic interference characteristics. Iron powder cores (HC8LP-8R2-R) and carbonyl powder cores (SRP1038A-8R2M) exhibit different Q factors and self-resonant frequency behavior. The substitute's carbonyl powder core with shielding reduces EMI emissions but may exhibit different impedance characteristics at specific frequencies. Verify frequency response compatibility in noise-sensitive circuits.

Q: Why does the substitute have lower DC resistance?

A: Lower DC resistance results from differences in wire gauge, winding configuration, and core material properties. The SRP1038A-8R2M's 24 mOhm maximum DCR versus the HC8LP-8R2-R's 58 mOhm maximum represents improved conductor efficiency. This reduces I²R losses and heat generation, benefiting thermal performance and component reliability.

Q: Are both parts available in equivalent packaging formats?

A: Both parts are supplied in Tape & Reel (TR) packaging for automated assembly. Both are classified as Nonstandard package type. Verify that your assembly equipment accommodates the slightly different physical dimensions (11.00 x 10.00 mm versus 10.90 x 10.40 mm) and the 0.50 mm height difference.

Q: What compliance certifications apply to both parts?

A: Both the HC8LP-8R2-R and SRP1038A-8R2M maintain ROHS3 compliance, confirming restriction of hazardous substances. The SRP1038A-8R2M additionally carries AEC-Q200 automotive qualification and REACH Unaffected status. Both parts have MSL 1 (unlimited) moisture sensitivity, requiring no special handling during storage or assembly.

Q: How do the saturation current ratings affect circuit design?

A: Saturation current (Isat) defines the current level at which inductance begins to degrade significantly. The HC8LP-8R2-R saturates at 7.4 A, while the SRP1038A-8R2M saturates at 12.5 A. For applications operating near the 4.5 A rating of the original part, the substitute provides additional margin before inductance degradation occurs, improving circuit stability under transient conditions.