DRA73-150-R Equivalent & Substitute Parts

Part Overview

The DRA73-150-R is a 15 µH shielded wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 1.74 A continuous current with a saturation current of 2 A and a DC resistance of 94 mOhm. The part is AEC-Q200 qualified and operates across the temperature range of -40°C to 165°C. It is currently in active production status with 1730 units available in stock.

Equivalent and substitute parts are identified when design requirements permit relaxation of specific electrical or mechanical constraints, such as shielding type, current rating, package dimensions, or operating temperature range, while maintaining the core inductance value and frequency characteristics.

Substiute Parts

DRA73-150-R

Eaton - Electronics DivisionIn Stock: 1837DRA73-150-R Datasheet

Current PartRFQ

SRN6045-150M

Bourns Inc.In Stock: 3606SRN6045-150M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the DRA73-150-R is permissible when the following core electrical parameters are maintained or exceeded:

Critical Parameters (Must Match or Exceed):

• Inductance value: 15 µH at 100 kHz test frequency
• Inductance tolerance: ±20%
• Current rating: minimum 1.74 A
• Saturation current: minimum 2 A
• DC resistance: within acceptable operating limits (≤100 mOhm)
• Operating temperature range: must support -40°C minimum and preferably 165°C maximum
• Surface mount configuration
• RoHS3 compliance

Parameters Permitting Variation:

• Shielding type (shielded to semi-shielded)
• Package dimensions (within PCB layout constraints)
• Packaging format (Tape & Reel to Cut Tape & Digi-Reel)
• Manufacturer and series designation
• Self-resonant frequency and Q factor (when not specified as design requirements)

The SRN6045-150M from Bourns Inc. qualifies as a substitute based on matching inductance, tolerance, and exceeding current and saturation ratings, despite differences in shielding type, package size, and maximum operating temperature.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (DRA73-150-R): Select the DRA73-150-R when the application requires full shielding for EMI containment or when the upper operating temperature limit of 165°C is mandatory. This part is AEC-Q200 qualified, indicating suitability for automotive and high-reliability applications. Active production status and 1730 units in stock ensure supply continuity.

Substitute Part Selection (SRN6045-150M): The SRN6045-150M from Bourns Inc. is suitable as a substitute when:

• The application operates at or below 125°C maximum temperature
• Semi-shielded configuration is acceptable for EMI performance
• Smaller package footprint (6.00 × 6.00 mm) provides PCB layout advantage
• Current and saturation ratings of 1.9 A and 2.3 A respectively exceed design requirements
• RoHS3 compliance and MSL 1 rating satisfy environmental and handling requirements

Both parts are active products with established supply chains. The selection between primary and substitute depends on thermal operating range and shielding requirements specific to the end application.

Frequently Asked Questions (FAQ)

Q: Can the SRN6045-150M replace the DRA73-150-R in all applications?

A: No. The SRN6045-150M is suitable only when the application maximum operating temperature does not exceed 125°C. The DRA73-150-R supports operation to 165°C. Additionally, the SRN6045-150M provides semi-shielded rather than full shielding; verify that EMI performance requirements are met in your specific circuit.

Q: What is the difference between shielded and semi-shielded inductors?

A: Shielded inductors (DRA73-150-R) provide complete magnetic field containment, reducing electromagnetic interference to surrounding components. Semi-shielded inductors (SRN6045-150M) offer partial containment with lower cost and smaller package size. Selection depends on circuit layout density and EMI sensitivity.

Q: Are the package dimensions compatible on the same PCB?

A: The DRA73-150-R measures 7.60 × 7.60 × 3.55 mm (max height), while the SRN6045-150M measures 6.00 × 6.00 × 4.50 mm (max height). The substitute has a smaller footprint but greater height. Verify that your PCB layout and component clearance specifications accommodate the SRN6045-150M dimensions before substitution.

Q: Do both parts meet automotive qualification standards?

A: The DRA73-150-R carries AEC-Q200 qualification, suitable for automotive applications. The SRN6045-150M does not list AEC-Q200 qualification in the provided specifications. If automotive qualification is a design requirement, the DRA73-150-R is the appropriate selection.

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

A: The DRA73-150-R has 94 mOhm DC resistance, while the SRN6045-150M has a maximum of 95.8 mOhm. This 1.8 mOhm difference (approximately 2%) is negligible for most applications and falls within normal manufacturing tolerance.

Q: Can I use the SRN6045-150M if my circuit operates at 150°C?

A: No. The SRN6045-150M maximum operating temperature is 125°C. Operating at 150°C exceeds the component's rated specification and may result in inductor failure or performance degradation. Use the DRA73-150-R for applications requiring operation above 125°C.

Q: Are both parts available in the same packaging format?

A: No. The DRA73-150-R is supplied in Tape & Reel (TR) format, while the SRN6045-150M is supplied in Cut Tape (CT) & Digi-Reel® format. Verify that your assembly process and equipment are compatible with the substitute packaging before ordering.