DRA73-820-R Equivalent & Substitute Parts

Part Overview

The DRA73-820-R is a 82 µH shielded wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 731 mA continuous current with a maximum saturation current of 851 mA and a DC resistance of 530 mOhm. The part is actively produced, AEC-Q200 qualified, and RoHS3 compliant, making it suitable for automotive and industrial applications requiring reliable inductance in compact form factors.

Substitute parts are identified when equivalent inductance values, current ratings, and electrical characteristics align within acceptable tolerances for the application, while maintaining compliance certifications and operating temperature ranges.

Substiute Parts

DRA73-820-R

Eaton - Electronics DivisionIn Stock: 981DRA73-820-R Datasheet

Current PartRFQ

SRR0735A-820M

Bourns Inc.In Stock: 3742SRR0735A-820M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DRA73-820-R is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 82 µH (within ±20% tolerance band)
• Inductance tolerance: ±20%
• Shielding: Shielded construction required
• Mounting type: Surface Mount
• Package classification: Nonstandard form factor
• Compliance: AEC-Q200 qualification and RoHS3 compliance

Secondary Compatibility Factors:

• Current rating must support minimum 731 mA continuous operation
• Saturation current (Isat) must exceed 851 mA
• DC resistance (DCR) must not exceed 530 mOhm nominal
• Operating temperature range must encompass -40°C to 165°C or be compatible with application limits

The SRR0735A-820M from Bourns Inc. meets the primary matching criteria with equivalent inductance, shielding, surface mount configuration, and compliance certifications. Secondary factors show variations in current ratings and temperature range that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

DRA73-820-R Selection Criteria: Select the DRA73-820-R when applications require the full 731 mA continuous current rating, saturation current margin of 851 mA, or operating temperatures up to 165°C. This part is appropriate for high-temperature automotive and industrial environments where thermal headroom is critical. The part maintains active production status with AEC-Q200 qualification and RoHS3 compliance.

SRR0735A-820M Selection Criteria: The SRR0735A-820M from Bourns is suitable for applications where continuous current requirements do not exceed 630 mA and maximum operating temperature does not exceed 125°C. This substitute offers lower DC resistance (480 mOhm maximum versus 530 mOhm), which may provide thermal efficiency benefits in lower-current applications. The part is also AEC-Q200 qualified and RoHS3 compliant with active production status.

Application-Specific Considerations: Both parts share identical inductance values, tolerance bands, shielding, surface mount configuration, and compliance certifications. Selection between these parts depends on whether the application current profile and thermal environment align with the rated specifications of each component. The dimensional differences (7.60mm versus 7.30mm footprint, 3.55mm versus 3.70mm height) must be verified against PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can the SRR0735A-820M directly replace the DRA73-820-R in all applications?

A: Direct replacement is possible only when application current requirements do not exceed 630 mA continuous and maximum operating temperature does not exceed 125°C. Both parts share identical inductance (82 µH), tolerance (±20%), shielding, surface mount configuration, and compliance certifications. However, the Bourns part has lower current and saturation ratings, and a reduced maximum operating temperature. Verify application specifications before substitution.

Q: What are the key electrical differences between these two inductors?

A: The primary electrical differences are current rating (DRA73-820-R: 731 mA versus SRR0735A-820M: 630 mA), saturation current (DRA73-820-R: 851 mA versus SRR0735A-820M: 650 mA), and maximum operating temperature (DRA73-820-R: 165°C versus SRR0735A-820M: 125°C). The DC resistance is lower in the Bourns part (480 mOhm maximum versus 530 mOhm). Inductance values and tolerance are identical.

Q: Are there physical compatibility issues between these parts?

A: Both parts are surface mount components with nonstandard form factors. The DRA73-820-R measures 7.60mm x 7.60mm x 3.55mm (height), while the SRR0735A-820M measures 7.30mm x 7.30mm x 3.70mm (height). The Bourns part is slightly smaller in footprint but slightly taller. PCB layout and clearance requirements must be verified for each application.

Q: Do both parts meet automotive qualification standards?

A: Yes. Both the DRA73-820-R and SRR0735A-820M are AEC-Q200 qualified, indicating suitability for automotive applications. Both are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. Both are actively produced components.

Q: What is the significance of the different inductance test frequencies?

A: The DRA73-820-R inductance is tested at 100 kHz, while the SRR0735A-820M is tested at 1 kHz. Both parts are specified with ±20% tolerance, which encompasses normal frequency-dependent inductance variation. The test frequency difference reflects manufacturer characterization methods but does not affect substitution eligibility when inductance values and tolerances are identical.