DRA127-3R3-R Equivalent & Substitute Parts

Part Overview

The DRA127-3R3-R is a 3.3 µH shielded wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 9.59 A continuous current with a DC resistance of 6.8mOhm and operates across the temperature range of -40°C to 165°C. The part is AEC-Q200 qualified and ROHS3 compliant, making it suitable for automotive and industrial applications requiring high reliability standards.

Equivalent and substitute parts are identified based on matching inductance value, shielding characteristics, surface mount packaging, and compatible electrical performance parameters within acceptable tolerance ranges.

Substiute Parts

DRA127-3R3-R

Eaton - Electronics DivisionIn Stock: 778DRA127-3R3-R Datasheet

Current PartRFQ

DR127-3R3-R

Eaton - Electronics DivisionIn Stock: 4289DR127-3R3-R Datasheet

SimilarRFQ

B82477P4332M000

EPCOS - TDK ElectronicsIn Stock: 1375B82477P4332M000 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DRA127-3R3-R are qualified based on the following criteria:

Primary Matching Parameters:

• Inductance value: 3.3 µH (within ±20% tolerance specification)
• Shielding: Shielded construction required
• Mounting: Surface mount technology
• Package footprint: 12.50 x 12.50 mm base dimensions
• Inductance test frequency: 100 kHz

Acceptable Variation Parameters:

• Current rating: Substitute must equal or exceed 9.59 A minimum
• DC resistance: Substitute must not exceed 6.8mOhm significantly
• Saturation current: Substitute must support minimum 18.7 A
• Operating temperature: Substitute must cover -40°C minimum and 165°C maximum, or provide equivalent thermal performance within application limits
• Compliance: ROHS3 and AEC-Q200 certifications preferred for automotive applications

Parts meeting these criteria are listed as direct equivalents or functional substitutes.

Parameter Comparison

Engineering Selection Recommendations

DR127-3R3-R (Eaton - Electronics Division): This substitute offers superior electrical performance with higher current rating (10.5 A vs. 9.59 A) and lower DC resistance (5.67mOhm vs. 6.8mOhm). Both parts share identical footprint dimensions and inductance specifications. The DR127-3R3-R is manufactured by the same supplier as the main part, ensuring design consistency. However, the operating temperature maximum is limited to 125°C compared to 165°C for the DRA127-3R3-R. This substitute is suitable for applications where the lower temperature rating is acceptable. AEC-Q200 certification is not listed for this variant.

B82477P4332M000 (EPCOS - TDK Electronics): This substitute maintains AEC-Q200 qualification and extends the operating temperature range to -55°C, providing broader thermal coverage. The part shares the same inductance and tolerance specifications. However, the DC resistance is higher at 10mOhm maximum, and the saturation current is lower at 9.6 A. The package height is slightly increased to 8.50mm. This substitute is appropriate for applications requiring extended low-temperature operation and automotive-grade reliability certification, provided the higher DC resistance and lower saturation current do not compromise circuit performance.

Selection Criteria:

• For maximum current capacity and lowest resistance: DR127-3R3-R
• For extended temperature range and AEC-Q200 compliance: B82477P4332M000
• For original specification match: DRA127-3R3-R

Frequently Asked Questions (FAQ)

Q: Can DR127-3R3-R replace DRA127-3R3-R in all applications?

A: DR127-3R3-R is electrically compatible for most applications due to matching inductance, tolerance, and footprint. The primary limitation is the reduced maximum operating temperature of 125°C versus 165°C. Applications operating above 125°C require the original DRA127-3R3-R or alternative parts with higher temperature ratings.

Q: What is the impact of different DC resistance values between substitutes?

A: DC resistance affects power dissipation and thermal performance. The DR127-3R3-R has lower resistance (5.67mOhm), resulting in reduced heat generation. The B82477P4332M000 has higher resistance (10mOhm maximum), which increases power loss. For high-current applications, lower resistance is preferable. Circuit design must account for these differences in thermal calculations.

Q: Are all three parts pin-compatible?

A: Yes. All three parts are surface mount inductors with identical 12.50 x 12.50 mm footprints and compatible mounting pads. The B82477P4332M000 has a slightly greater height (8.50mm vs. 8.00mm), which may affect clearance in space-constrained designs but does not impact electrical compatibility.

Q: Which substitute is best for automotive applications?

A: Both DRA127-3R3-R and B82477P4332M000 carry AEC-Q200 certification, meeting automotive reliability standards. The DRA127-3R3-R is preferred for high-temperature environments. The B82477P4332M000 is preferred for extended low-temperature operation. DR127-3R3-R lacks AEC-Q200 certification and is not recommended for automotive applications requiring this qualification.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging is supplied on continuous reels suitable for automated assembly lines. Cut Tape (CT) and Digi-Reel® packaging provides smaller quantities in tape format. Both formats are compatible with standard pick-and-place equipment. Selection depends on production volume and inventory management requirements.

Q: Can saturation current differences affect circuit performance?

A: Yes. Saturation current defines the maximum current before inductance degrades significantly. The DRA127-3R3-R has 18.7 A saturation current, DR127-3R3-R has 21.5 A, and B82477P4332M000 has 9.6 A. Applications with transient currents approaching saturation limits must use parts with adequate saturation margins. The B82477P4332M000 has the lowest saturation current and may not be suitable for high-current pulse applications.