DRA73-331-R Equivalent & Substitute Parts

Part Overview

The DRA73-331-R is a 330 µH shielded wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 391 mA continuous current with a DC resistance of 1.85 Ohm and operates across the temperature range of -40°C to 165°C. The part carries AEC-Q200 qualification and ROHS3 compliance, making it suitable for automotive and industrial applications requiring high reliability standards. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and environmental ratings to ensure functional interchangeability in circuit designs.

Substiute Parts

DRA73-331-R

Eaton - Electronics DivisionIn Stock: 893DRA73-331-R Datasheet

Current PartRFQ

B82472G6334M000

EPCOS - TDK ElectronicsIn Stock: 2005B82472G6334M000 Datasheet

SimilarRFQ

B82472P6334M000

EPCOS - TDK ElectronicsIn Stock: 1690B82472P6334M000 Datasheet

SimilarRFQ

SRR0735A-331M

Bourns Inc.In Stock: 4133SRR0735A-331M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DRA73-331-R are qualified based on the following electrical and mechanical parameters:

Primary Matching Criteria:

• Inductance value of 330 µH with ±20% tolerance
• Shielded construction to maintain electromagnetic isolation
• Surface mount configuration with nonstandard package dimensions
• Current rating capability within acceptable operating margins
• DC resistance within practical limits for the application
• ROHS3 compliance and AEC-Q200 or equivalent automotive qualification

Substitution Logic: Parts are considered equivalent when they maintain the core inductance specification, support the required current levels, and operate within overlapping temperature ranges. Variations in DC resistance, saturation current, and physical dimensions are evaluated for circuit compatibility. All substitute parts listed maintain shielded wirewound or drum core construction with ferrite materials, ensuring consistent electromagnetic performance and thermal stability.

Parameter Comparison

Engineering Selection Recommendations

B82472G6334M000 (EPCOS - TDK Electronics): This substitute provides equivalent inductance and shielding with a lower DC resistance of 1.7 Ohm maximum. The current rating of 330 mA is lower than the DRA73-331-R, requiring circuit evaluation for applications demanding the full 391 mA rating. The operating temperature range of -55°C to 125°C is narrower at the upper limit. Physical dimensions are slightly smaller (7.30mm vs 7.60mm), and height is greater (4.50mm vs 3.55mm). This part is suitable for applications where the reduced current rating and temperature range are acceptable. Product status is active with ROHS3 compliance.

B82472P6334M000 (EPCOS - TDK Electronics): This substitute offers the same electrical specifications as B82472G6334M000 with the addition of AEC-Q200 qualification, matching the automotive reliability standard of the DRA73-331-R. The operating temperature range extends to 150°C, providing better high-temperature performance than B82472G6334M000 but still below the DRA73-331-R maximum of 165°C. Current rating remains at 330 mA. Physical dimensions and height are identical to B82472G6334M000. This part is recommended for automotive applications requiring AEC-Q200 compliance. Product status is active with ROHS3 compliance and REACH unaffected status.

SRR0735A-331M (Bourns Inc.): This substitute maintains the 330 µH inductance with shielded drum core construction and ferrite material. The DC resistance is 2 Ohm maximum, slightly higher than the DRA73-331-R. Current rating is 330 mA with saturation current of 330 mA. The operating temperature range of -40°C to 125°C matches the lower limit of the DRA73-331-R but is limited to 125°C at the upper end. Physical dimensions are 7.30mm x 7.30mm with a height of 3.70mm, providing a more compact profile than the EPCOS alternatives. This part carries AEC-Q200 qualification and is suitable for applications where the reduced temperature range and current rating are compatible with circuit requirements. Product status is active with ROHS3 compliance and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the B82472G6334M000 be used as a direct replacement for the DRA73-331-R in all applications?

A: The B82472G6334M000 shares the same 330 µH inductance and ±20% tolerance with shielded construction. However, the current rating is 330 mA compared to 391 mA for the DRA73-331-R. Applications requiring continuous current above 330 mA must be evaluated for compatibility. The operating temperature range is also narrower (-55°C to 125°C vs -40°C to 165°C). Substitution is valid only when circuit current demands do not exceed 330 mA and operating temperatures remain within the specified range.

Q: What is the significance of the height difference between substitute parts?

A: The DRA73-331-R has a maximum seated height of 0.140" (3.55mm), while B82472G6334M000 and B82472P6334M000 are 0.177" (4.50mm), and SRR0735A-331M is 0.146" (3.70mm). Height differences affect PCB layout and clearance requirements. Applications with space constraints or specific height limitations must verify that substitute parts fit within available vertical clearance. The SRR0735A-331M provides the closest height match to the original part.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed (B82472G6334M000, B82472P6334M000, and SRR0735A-331M) are ROHS3 compliant with MSL rating of 1 (Unlimited). This ensures compatibility with environmental and regulatory requirements matching the DRA73-331-R.

Q: Which substitute part is recommended for automotive applications?

A: Both B82472P6334M000 and SRR0735A-331M carry AEC-Q200 qualification, making them suitable for automotive applications. B82472P6334M000 offers a higher operating temperature maximum of 150°C, while SRR0735A-331M provides a more compact height profile of 3.70mm. Selection depends on specific thermal and spatial requirements of the automotive circuit design.

Q: How do DC resistance variations affect circuit performance?

A: The DRA73-331-R has a DC resistance of 1.85 Ohm. Substitute parts range from 1.7 Ohm maximum (EPCOS parts) to 2 Ohm maximum (Bourns). These variations affect power dissipation and voltage drop across the inductor. Applications sensitive to resistive losses must calculate the impact of the substitute part's DCR on overall circuit efficiency and thermal performance.

Q: What is the difference between the two EPCOS substitute parts?

A: B82472G6334M000 and B82472P6334M000 have identical electrical specifications and physical dimensions. The key difference is that B82472P6334M000 includes AEC-Q200 qualification and extends the operating temperature range to 150°C (compared to 125°C for B82472G6334M000). For automotive and high-reliability applications, B82472P6334M000 is the preferred choice.

Q: Can substitute parts with lower current ratings be used in circuits designed for 391 mA?

A: Substitute parts with 330 mA ratings (B82472G6334M000, B82472P6334M000, and SRR0735A-331M) cannot be used in circuits requiring continuous current above 330 mA. Exceeding the current rating causes excessive heating, reduced inductor lifespan, and potential circuit failure. Circuit redesign or selection of alternative parts with higher current ratings is necessary for applications demanding the full 391 mA capability.