DRA127-8R2-R Equivalent & Substitute Parts

Part Overview

The DRA127-8R2-R is an 8.2 µH shielded wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 6.33 A continuous current with a saturation current of 12.2 A and features a DC resistance of 16 mOhm. The part is actively produced and complies with AEC-Q200 automotive qualification standards and ROHS3 requirements.

Substitute parts are identified when equivalent inductance values, current ratings, shielding characteristics, and package dimensions align within acceptable engineering tolerances for the application. The DRA127-8R2-R has one qualified substitute in the Eaton product ecosystem.

Substiute Parts

DRA127-8R2-R

Eaton - Electronics DivisionIn Stock: 695DRA127-8R2-R Datasheet

Current PartRFQ

SRR1280A-8R2Y

Bourns Inc.In Stock: 3521SRR1280A-8R2Y Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DRA127-8R2-R is determined by the following criteria:

Inductance Value: The substitute must provide 8.2 µH inductance. Tolerance variations are acceptable within the specified range for each part.

Current Handling: The substitute must support a minimum continuous current rating of 6.33 A. Saturation current characteristics must be evaluated for the specific application load profile.

DC Resistance: The substitute DCR value must be compatible with circuit power dissipation requirements. Higher DCR values increase resistive losses.

Shielding: The substitute must maintain shielded construction to prevent electromagnetic interference in the application environment.

Package Dimensions: The substitute must fit the 12.50 x 12.50 x 8.00 mm footprint or be mechanically compatible with the PCB layout.

Compliance Standards: The substitute must maintain AEC-Q200 automotive qualification and ROHS3 compliance status.

Operating Temperature: The substitute operating temperature range must encompass the application requirements.

The SRR1280A-8R2Y from Bourns Inc. meets these substitution criteria with equivalent inductance, compatible current ratings, shielded construction, and identical package dimensions.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: The DRA127-8R2-R remains the preferred component when the application requires the extended operating temperature range of -40 to 165°C, higher saturation current margin (12.2 A), and lower DC resistance (16 mOhm). These characteristics are critical in high-temperature automotive and industrial environments with sustained current loads.

Substitute Selection: The SRR1280A-8R2Y is suitable as a substitute when the application operates within the -40 to 125°C temperature range and the continuous current requirement does not exceed 6.2 A. The higher DC resistance (20.5 mOhm) and lower saturation current (6.8 A) must be evaluated against circuit power dissipation and transient current specifications.

Both parts maintain active product status, AEC-Q200 automotive qualification, and ROHS3 compliance. Selection between these parts depends on the specific thermal and current requirements of the target application.

Frequently Asked Questions (FAQ)

Q: Can the SRR1280A-8R2Y replace the DRA127-8R2-R in all applications?

A: No. The SRR1280A-8R2Y has a lower maximum operating temperature (125°C vs. 165°C), lower saturation current (6.8 A vs. 12.2 A), and higher DC resistance (20.5 mOhm vs. 16 mOhm). Substitution is valid only when the application operates within these reduced specifications.

Q: What is the impact of the higher DC resistance in the Bourns part?

A: Higher DC resistance increases resistive power loss in the inductor. At 6.2 A continuous current, the SRR1280A-8R2Y dissipates approximately 0.79 W compared to 0.64 W for the DRA127-8R2-R. This difference must be evaluated in thermal budget calculations.

Q: Are the package dimensions identical?

A: Yes. Both parts use a 12.50 x 12.50 x 8.00 mm surface mount package with identical footprints. PCB layout compatibility is maintained.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both the DRA127-8R2-R and SRR1280A-8R2Y carry AEC-Q200 qualification and ROHS3 compliance certification.

Q: What is the difference in inductance tolerance?

A: The DRA127-8R2-R specifies ±20% tolerance while the SRR1280A-8R2Y specifies ±30% tolerance. Applications requiring tighter inductance control should use the Eaton part.

Q: Can the Bourns part handle the same saturation current as the Eaton part?

A: No. The SRR1280A-8R2Y saturates at 6.8 A compared to 12.2 A for the DRA127-8R2-R. Applications with transient currents exceeding 6.8 A require the Eaton part to prevent inductor saturation.