HC8-8R2-R Equivalent & Substitute Parts

Part Overview

The HC8-8R2-R is an 8.2 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 5.5 A continuous current with a maximum DC resistance of 39.6 mOhm and operates across the temperature range of -40°C to 155°C. The part is currently active in production and available in tape and reel packaging with ROHS3 compliance.

Substitute parts are identified when equivalent inductance values, current ratings, and core material specifications align within acceptable electrical and mechanical tolerances for the application category.

Substiute Parts

HC8-8R2-R

Eaton - Electronics DivisionIn Stock: 879HC8-8R2-R Datasheet

Current PartRFQ

SRP1038A-8R2M

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

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute relationships for the HC8-8R2-R are established based on the following critical parameters:

Inductance Value: Both the main part and substitute must maintain 8.2 µH nominal inductance with ±20% tolerance.

Current Rating: The substitute part must support the required continuous current load. The HC8-8R2-R operates at 5.5 A; substitutes with equal or higher current ratings are acceptable.

Saturation Current: The substitute must maintain saturation current specifications compatible with circuit protection requirements.

DC Resistance: Lower DCR values in substitutes reduce power dissipation and heat generation, provided the part maintains equivalent inductance and current handling.

Core Material and Type: Both drum core wirewound construction and material composition (iron powder or carbonyl powder) determine frequency response and thermal characteristics.

Mounting and Package: Surface mount nonstandard packages with tape and reel delivery ensure manufacturing compatibility.

Compliance: ROHS3 compliance and moisture sensitivity level (MSL 1) are required for equivalent substitution.

Parameter Comparison

Engineering Selection Recommendations

HC8-8R2-R (Eaton - Electronics Division): This part remains the primary selection for applications requiring unshielded construction with iron powder core material. The component is active in production with full ROHS3 compliance and unlimited moisture sensitivity rating. Operating temperature extends to 155°C, providing thermal margin in high-temperature environments.

SRP1038A-8R2M (Bourns Inc.): This substitute part provides equivalent inductance with superior electrical performance characteristics. The 8 A current rating exceeds the HC8-8R2-R requirement by 45%, and the 24 mOhm maximum DCR is 39% lower, reducing resistive losses. The shielded construction and carbonyl powder core offer improved EMI containment. The part carries AEC-Q200 automotive qualification and REACH compliance. Operating temperature is rated to 150°C, which is 5°C lower than the primary part. The SRP1038A-8R2M is suitable for applications where lower DC resistance, higher current margin, and EMI shielding provide system-level benefits.

Both parts are active products with equivalent inductance tolerance, surface mount packaging, and full compliance certifications. Selection between them depends on specific application requirements regarding shielding, core material, thermal environment, and current margin.

Frequently Asked Questions (FAQ)

Q: Can the SRP1038A-8R2M directly replace the HC8-8R2-R in all applications?

A: Direct substitution is possible for applications where the 8.2 µH inductance value and ±20% tolerance are the primary requirements. The SRP1038A-8R2M provides higher current rating (8 A vs. 5.5 A) and lower DC resistance (24 mOhm vs. 39.6 mOhm). However, the shielded construction and carbonyl powder core material differ from the unshielded iron powder design of the HC8-8R2-R. Applications sensitive to core material characteristics or requiring unshielded operation must evaluate compatibility independently.

Q: What is the significance of the 5°C difference in maximum operating temperature?

A: The HC8-8R2-R operates to 155°C while the SRP1038A-8R2M is rated to 150°C. For applications operating near or above 150°C, the HC8-8R2-R provides additional thermal margin. For applications below 150°C, both parts are equivalent in this parameter.

Q: Why does the SRP1038A-8R2M have lower DC resistance despite equivalent inductance?

A: DC resistance is determined by wire gauge, winding configuration, and core material properties. The SRP1038A-8R2M achieves lower DCR through optimized winding design and carbonyl powder core characteristics. Lower DCR reduces I²R losses and heat generation during operation.

Q: Are the physical dimensions compatible between these parts?

A: Both parts are nonstandard package types with similar footprints. HC8-8R2-R dimensions are 10.90mm L × 10.40mm W × 4.00mm H (max seated height). SRP1038A-8R2M dimensions are 11.00mm L × 10.00mm W × 4.00mm H (max seated height). The 0.1mm length difference and 0.4mm width difference are within typical PCB layout tolerances for surface mount placement.

Q: What does AEC-Q200 qualification on the SRP1038A-8R2M indicate?

A: AEC-Q200 is an automotive electronics qualification standard. This certification indicates the SRP1038A-8R2M has undergone stress testing and reliability validation for automotive applications. The HC8-8R2-R does not list this certification in the provided specifications.

Q: How do shielded versus unshielded constructions affect circuit performance?

A: Shielded inductors (SRP1038A-8R2M) contain electromagnetic fields more effectively, reducing radiated EMI and susceptibility to external magnetic fields. Unshielded inductors (HC8-8R2-R) have lower cost and smaller form factors but allow greater field radiation. Selection depends on EMI requirements and circuit layout constraints.