Equivalent & Substitute Parts for DR73-331-R

Part Overview

The DR73-331-R is a 330 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 420 mA continuous current with a DC resistance of 1.59 Ohm and operates across the temperature range of -40°C to 125°C. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent inductance values, current ratings, and shielding characteristics align within acceptable electrical and mechanical tolerances for the application category.

Substiute Parts

DR73-331-R

Eaton - Electronics DivisionIn Stock: 3866DR73-331-R Datasheet

Current PartRFQ

P1166.334NLT

Pulse ElectronicsIn Stock: 901P1166.334NLT Datasheet

SimilarRFQ

SLF7045T-331MR35-H

TDK CorporationIn Stock: 2154SLF7045T-331MR35-H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the DR73-331-R are qualified based on the following electrical and mechanical criteria:

Primary Substitution Criteria:

• Inductance value: 330 µH (matching specification)
• Inductance tolerance: ±20% (matching specification)
• Shielding: Shielded configuration required
• Mounting type: Surface mount only
• Inductance test frequency: 100 kHz

Secondary Compatibility Factors:

• Current rating: Minimum 310 mA acceptable; saturation current minimum 310 mA
• DC resistance: Maximum 1.88 Ohm acceptable
• Operating temperature range: Minimum -40°C to 125°C overlap required
• Core type: Ferrite drum core or equivalent wirewound construction
• RoHS compliance: ROHS3 required
• MSL rating: 1 (Unlimited) required
• Package classification: Nonstandard surface mount

Substitutes are identified when all primary criteria are met and secondary factors remain within acceptable operational limits for the application.

Parameter Comparison

Engineering Selection Recommendations

DR73-331-R (Eaton - Electronics Division)

Primary selection for new designs. Active production status with full availability (3768 pcs in stock). Meets all specified electrical parameters with 420 mA current rating and 1.59 Ohm DC resistance. ROHS3 compliant with unlimited MSL rating suitable for standard manufacturing environments.

P1166.334NLT (Pulse Electronics)

Acceptable substitute for applications where current requirements do not exceed 310 mA. Active production status with 882 pcs available inventory. Provides lower DC resistance at 1.88 Ohm maximum and extended operating temperature to 130°C. Dimensions are comparable (7.54mm x 7.54mm) with slightly lower profile (3.51mm height). ROHS3 compliant with unlimited MSL rating. Self-resonant frequency specified at 4.1 MHz.

SLF7045T-331MR35-H (TDK Corporation)

Not recommended for new designs due to product status designation. Suitable only for legacy system maintenance or replacement applications. Current rating limited to 350 mA with saturation current of 350 mA. Provides lowest DC resistance at 1.38 Ohm maximum. Larger height profile at 4.80mm may present mechanical constraints in compact layouts. AEC-Q200 rated for automotive applications. ROHS3 compliant with unlimited MSL rating.

Frequently Asked Questions (FAQ)

Q: Can P1166.334NLT replace DR73-331-R in all applications?

A: No. P1166.334NLT is limited to 310 mA continuous current rating compared to DR73-331-R at 420 mA. Substitution is valid only when application current requirements do not exceed 310 mA saturation current.

Q: What is the primary difference in DC resistance between these parts?

A: DR73-331-R specifies 1.59 Ohm, P1166.334NLT specifies 1.88 Ohm maximum, and SLF7045T-331MR35-H specifies 1.38 Ohm maximum. Higher DC resistance increases power dissipation; lower resistance reduces heat generation. Selection depends on thermal budget requirements.

Q: Are all three parts physically interchangeable?

A: Footprint compatibility exists for DR73-331-R and P1166.334NLT (7.60mm and 7.54mm respectively). SLF7045T-331MR35-H has a smaller footprint (7.00mm) but greater height (4.80mm vs 3.55mm), requiring verification of PCB layout clearance.

Q: Why is SLF7045T-331MR35-H marked "Not For New Designs"?

A: Product status indicates this part is in end-of-life phase. TDK has designated it unsuitable for new design implementations. Use is restricted to legacy system support and replacement inventory only.

Q: Do all substitutes maintain the same inductance tolerance?

A: Yes. All three parts specify ±20% inductance tolerance at 100 kHz test frequency, ensuring equivalent inductance stability across the specified range.

Q: What compliance certifications apply to all substitute options?

A: All parts are ROHS3 compliant, REACH unaffected, and carry MSL rating of 1 (Unlimited). All are classified under ECCN EAR99 for export purposes.

Q: Is operating temperature range a limiting factor for substitution?

A: DR73-331-R and SLF7045T-331MR35-H both operate -40°C to 125°C. P1166.334NLT extends to 130°C maximum. All three overlap the standard -40°C to 125°C range, making temperature compatibility non-restrictive for typical applications.