DRA73-680-R Equivalent & Substitute Parts

Part Overview

The DRA73-680-R is a 68 µH shielded wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 845 mA continuous current with a DC resistance of 397 mOhm and operates across the temperature range of -40°C to 165°C. The part maintains Active product status and carries AEC-Q200 certification, making it suitable for automotive and industrial applications. Equivalent and substitute parts are identified to provide design flexibility, inventory alternatives, and sourcing options while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Substiute Parts

DRA73-680-R

Eaton - Electronics DivisionIn Stock: 1133DRA73-680-R Datasheet

Current PartRFQ

B82472G4683M000

EPCOS - TDK ElectronicsIn Stock: 4335B82472G4683M000 Datasheet

SimilarRFQ

SRR0735A-680M

Bourns Inc.In Stock: 5612SRR0735A-680M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DRA73-680-R are qualified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Inductance value: 68 µH at ±20% tolerance
• Inductance test frequency: 100 kHz
• Shielding: Shielded construction
• Mounting type: Surface Mount
• Package classification: Nonstandard
• RoHS compliance: ROHS3 Compliant
• Moisture sensitivity: MSL 1 (Unlimited)

Secondary Compatibility Parameters:

• Current rating within acceptable operating range
• DC resistance within practical limits for the application
• Operating temperature range overlap
• Physical dimensions compatible with board layout constraints
• Saturation current sufficient for circuit requirements

The identified substitute parts B82472G4683M000 and SRR0735A-680M meet the primary matching criteria. Variations in current rating, DC resistance, and temperature range are documented to enable informed selection based on specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

DRA73-680-R (Primary Part): The DRA73-680-R is the specified component with Active product status and AEC-Q200 certification. It provides the highest current rating (845 mA) and saturation current (937 mA) among the three options, with the lowest DC resistance (397 mOhm). The extended operating temperature range (-40 to 165°C) supports high-temperature applications. This part is recommended when maximum current capacity and thermal performance are required.

B82472G4683M000 (EPCOS - TDK Electronics): This substitute offers ROHS3 compliance and MSL 1 rating. The extended low-temperature operating range (-55 to 125°C) is suitable for cryogenic or extreme cold environments. However, the reduced current rating (690 mA) and saturation current (600 mA) limit its use to lower-power circuits. The slightly higher DC resistance (460 mOhm Max) results in increased power dissipation. This part is suitable for applications where low-temperature performance is prioritized over current capacity.

SRR0735A-680M (Bourns Inc.): This substitute carries AEC-Q200 certification and ROHS3 compliance with MSL 1 rating. The current rating (720 mA) and saturation current (740 mA) provide intermediate performance between the primary part and the EPCOS option. DC resistance (400 mOhm Max) is comparable to the primary part. The operating temperature range (-40 to 125°C) covers standard industrial and automotive applications. This part offers balanced performance and is suitable for general-purpose substitution when the primary part is unavailable.

Frequently Asked Questions (FAQ)

Q: Can B82472G4683M000 replace DRA73-680-R in all applications?

A: B82472G4683M000 is electrically equivalent for inductance value and tolerance. However, the reduced current rating (690 mA vs. 845 mA) and saturation current (600 mA vs. 937 mA) restrict its use to circuits operating below 690 mA continuous current. The narrower operating temperature range (-55 to 125°C vs. -40 to 165°C) excludes high-temperature applications above 125°C. Verify circuit current requirements before substitution.

Q: What are the physical compatibility considerations?

A: All three parts are surface mount components with nonstandard packages. DRA73-680-R measures 7.60 x 7.60 mm with 3.55 mm seated height. B82472G4683M000 measures 7.30 x 7.30 mm with 3.50 mm seated height. SRR0735A-680M measures 7.30 x 7.30 mm with 3.70 mm seated height. The smaller footprint of the substitute parts (7.30 x 7.30 mm) may provide layout advantages, while the height variations require PCB clearance verification.

Q: How do DC resistance differences affect circuit performance?

A: DRA73-680-R has 397 mOhm DCR, while B82472G4683M000 has 460 mOhm Max and SRR0735A-680M has 400 mOhm Max. Higher DC resistance increases power dissipation (P = I²R). At 700 mA, the difference between 397 mOhm and 460 mOhm results in approximately 31 mW additional dissipation. For thermal-sensitive applications, the lower DCR of the primary part or SRR0735A-680M is preferred.

Q: Are all parts suitable for automotive applications?

A: DRA73-680-R and SRR0735A-680M both carry AEC-Q200 certification, qualifying them for automotive use. B82472G4683M000 does not specify AEC-Q200 certification. For automotive applications, DRA73-680-R or SRR0735A-680M are the appropriate choices.

Q: What is the significance of the inductance test frequency difference?

A: DRA73-680-R and B82472G4683M000 are tested at 100 kHz, while SRR0735A-680M is tested at 1 kHz. The inductance value (68 µH) is specified at these respective frequencies. For circuits operating at frequencies significantly different from the test frequency, frequency-dependent inductance variation should be evaluated using manufacturer frequency response data.

Q: Can these parts be used interchangeably in high-current applications?

A: No. The primary part DRA73-680-R is rated for 845 mA continuous current. B82472G4683M000 is limited to 690 mA, and SRR0735A-680M to 720 mA. For applications requiring sustained currents above 720 mA, only DRA73-680-R is suitable. Exceeding rated current causes excessive heating and potential inductor failure.