DRA74-331-R Equivalent & Substitute Parts

Part Overview

The DRA74-331-R is a 330 µH shielded wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 435 mA continuous current with a DC resistance of 1.5 Ohm and operates across the temperature range of -40°C to 165°C. The part maintains Active product status and carries AEC-Q200 qualification, making it suitable for automotive and industrial applications requiring reliable inductance performance.

Substitute parts are identified when equivalent inductance values, current ratings, and shielding characteristics align within acceptable tolerance ranges, allowing for component interchangeability in circuit designs where the primary electrical specifications remain constant.

Substiute Parts

DRA74-331-R

Eaton - Electronics DivisionIn Stock: 1717DRA74-331-R Datasheet

Current PartRFQ

B82472P6334M000

EPCOS - TDK ElectronicsIn Stock: 1690B82472P6334M000 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DRA74-331-R is determined by alignment of the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value of 330 µH at 100 kHz test frequency
• Inductance tolerance of ±20%
• Shielded construction to maintain electromagnetic isolation
• Surface mount configuration with nonstandard package dimensions
• AEC-Q200 qualification for automotive-grade reliability
• ROHS3 compliance and MSL 1 moisture sensitivity rating

Secondary Compatibility Factors:

• Current rating sufficient for circuit requirements (minimum 330 mA)
• DC resistance within acceptable operating parameters (maximum 1.7 Ohm)
• Operating temperature range overlap with application requirements
• Saturation current characteristics appropriate for load conditions

The substitute part B82472P6334M000 meets these criteria with equivalent inductance and shielding, though with reduced current rating (330 mA versus 435 mA) and slightly elevated DC resistance (1.7 Ohm maximum versus 1.5 Ohm).

Parameter Comparison

Engineering Selection Recommendations

DRA74-331-R Selection Criteria: The DRA74-331-R is the primary choice for applications requiring the full 435 mA continuous current rating and 514 mA saturation current specification. The higher current capacity and lower DC resistance (1.5 Ohm) result in reduced power dissipation and improved thermal performance. The extended upper operating temperature limit of 165°C accommodates high-temperature automotive and industrial environments. Active product status with established supply chain (1696 pcs in stock) ensures availability and long-term support.

B82472P6334M000 Selection Criteria: The B82472P6334M000 substitute is applicable in circuits where the maximum continuous current requirement does not exceed 330 mA and saturation current remains below 300 mA. The slightly elevated DC resistance (1.7 Ohm maximum) is acceptable where power dissipation margins exist. The lower upper operating temperature limit of 150°C restricts use in high-temperature applications. The ferrite drum core construction provides equivalent shielding performance for electromagnetic isolation. This substitute is suitable for cost optimization or supply chain diversification where current and temperature specifications permit.

Both parts maintain AEC-Q200 qualification, ROHS3 compliance, and MSL 1 rating, ensuring compatibility with automotive and industrial quality standards. Selection between these parts depends on circuit current requirements, thermal environment, and physical space constraints.

Frequently Asked Questions (FAQ)

Q: Can B82472P6334M000 replace DRA74-331-R in all applications?

A: No. The substitute part has a lower current rating (330 mA versus 435 mA) and lower saturation current (300 mA versus 514 mA). Substitution is valid only when circuit current requirements remain below 330 mA continuous and do not approach saturation conditions. The upper operating temperature limit is also reduced from 165°C to 150°C.

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

A: The B82472P6334M000 has a maximum DC resistance of 1.7 Ohm compared to 1.5 Ohm in the DRA74-331-R. This 0.2 Ohm difference increases power dissipation proportionally to the square of the current. At 330 mA, the additional dissipation is approximately 21.8 mW. This must be evaluated against thermal design margins in the application.

Q: Are the physical dimensions compatible for PCB layout?

A: The substitute part has a slightly smaller footprint (7.30 x 7.30 mm versus 7.60 x 7.60 mm) but is marginally taller (4.50 mm versus 4.35 mm). Both parts use nonstandard packages. PCB layout compatibility depends on specific land pattern design and clearance requirements. Verify mechanical fit before design release.

Q: Do both parts meet automotive quality standards?

A: Yes. Both DRA74-331-R and B82472P6334M000 carry AEC-Q200 qualification, ROHS3 compliance, and MSL 1 rating. They are suitable for automotive and industrial applications requiring established quality and reliability standards.

Q: What is the difference in core construction between these parts?

A: The DRA74-331-R uses a wirewound construction with unspecified core material. The B82472P6334M000 uses a drum core wirewound construction with ferrite core material. Both are shielded and provide equivalent electromagnetic isolation. The ferrite core in the substitute may offer different frequency response characteristics, though both are tested at 100 kHz.

Q: How do the inductance tolerances compare?

A: Both parts specify ±20% inductance tolerance at 100 kHz test frequency. This tolerance is identical and does not differentiate substitution suitability.

Q: What inventory considerations apply to these parts?

A: The DRA74-331-R has 1696 pcs in stock, while the B82472P6334M000 has 1628 pcs in stock. Both are listed as Active products with established supply availability. Selection may consider supply chain redundancy and lead time requirements.