SRP4020-2R2M Equivalent & Substitute Parts

Part Overview

The SRP4020-2R2M is a 2.2 µH shielded molded inductor manufactured by Bourns Inc., rated for 3.9 A continuous current with a maximum DC resistance of 40 mOhm. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part operates across an industrial temperature range of -55°C to 125°C and is fully RoHS3 compliant.

Substiute Parts

SRP4020-2R2M

Bourns Inc.In Stock: 1987SRP4020-2R2M Datasheet

Current PartRFQ

SRP4020TA-2R2M

Bourns Inc.In Stock: 19150SRP4020TA-2R2M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the SRP4020-2R2M is determined by the following critical parameters:

• Inductance Value: Must be 2.2 µH with ±20% tolerance
• Current Rating: Minimum 3.9 A continuous current capability
• Saturation Current: Minimum 5 A
• DC Resistance: Maximum 40 mOhm to maintain circuit performance
• Shielding: Must be shielded to prevent electromagnetic interference
• Mounting Type: Surface mount configuration required
• RoHS Compliance: ROHS3 compliant for regulatory alignment

The SRP4020TA-2R2M qualifies as a direct substitute based on matching inductance value, exceeding current ratings (4 A vs. 3.9 A), and maintaining shielded construction. While the substitute exhibits higher DC resistance (61 mOhm vs. 40 mOhm) and uses different core material (carbonyl powder vs. iron), these differences remain within acceptable engineering tolerances for equivalent circuit functionality.

Parameter Comparison

Engineering Selection Recommendations

The SRP4020TA-2R2M is the qualified substitute for the obsolete SRP4020-2R2M. Selection is based on the following factors:

• Product Status: The substitute is active and in production, ensuring long-term availability and supply chain continuity.
• Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements.
• Electrical Performance: The substitute exceeds the current rating specification (4 A vs. 3.9 A) and saturation current (6 A vs. 5 A), providing design margin.
• Thermal Range: The substitute extends the upper operating temperature to 150°C, supporting broader application requirements.
• Certifications: The substitute carries AEC-Q200 qualification, indicating automotive-grade reliability standards.

Frequently Asked Questions (FAQ)

Q: Can the SRP4020TA-2R2M directly replace the SRP4020-2R2M in existing designs?

A: Yes. Both parts share the same 2.2 µH inductance value, ±20% tolerance, and shielded surface mount construction. The substitute meets or exceeds all critical electrical parameters including current rating, saturation current, and DC resistance specifications.

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

A: The SRP4020TA-2R2M exhibits 61 mOhm maximum DC resistance compared to 40 mOhm in the original part. This 21 mOhm difference results in increased resistive losses. Circuit designs must account for this parameter variance during thermal and efficiency analysis.

Q: Are there package dimension differences between these parts?

A: Both parts are surface mount inductors with identical seated height of 0.079" (2.00mm). The SRP4020TA-2R2M uses a 2-SMD package with dimensions of 0.175" L x 0.160" W (4.45mm x 4.06mm), compared to the nonstandard package of the original part at 0.189" L x 0.157" W (4.80mm x 4.00mm). PCB layout verification is required to confirm fit.

Q: What certifications does the substitute part carry?

A: The SRP4020TA-2R2M is AEC-Q200 qualified, indicating compliance with automotive electronics reliability standards. Both parts are ROHS3 compliant and REACH unaffected.

Q: Why is the original part classified as obsolete?

A: The SRP4020-2R2M is no longer in active production. The SRP4020TA-2R2M represents the current generation equivalent from Bourns Inc., offering improved specifications and active supply chain support.