SRP1055-7R2M Equivalent & Substitute Parts

Part Overview

The SRP1055-7R2M is a 7.2 µH shielded drum core wirewound inductor manufactured by Bourns Inc., rated for 7 A continuous current with a maximum DC resistance of 15.5 mOhm. This component is designed for surface mount applications in power conversion and filtering circuits requiring controlled inductance values with ferrite core shielding.

The SRP1055-7R2M is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this inductor specification.

Substiute Parts

SRP1055-7R2M

Bourns Inc.In Stock: 1006SRP1055-7R2M Datasheet

Current PartRFQ

CEP125NP-7R2MC-H

Sumida America Components Inc.In Stock: 1994CEP125NP-7R2MC-H Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SRP1055-7R2M is determined by the following critical parameters:

Electrical Parameters:

• Inductance value must match at 7.2 µH
• Current rating must meet or exceed 7 A continuous
• DC resistance must not exceed 15.5 mOhm to maintain thermal and efficiency characteristics
• Saturation current must support the application's peak current requirements

Physical & Environmental Parameters:

• Core material must be ferrite with shielding to maintain electromagnetic compatibility
• Mounting type must be surface mount (SMD)
• Operating temperature range must encompass the application's thermal requirements
• Tolerance of ±20% is acceptable for this inductor category

Compliance Parameters:

• RoHS3 compliance is required for modern manufacturing standards
• Moisture sensitivity level of 1 (unlimited) ensures handling compatibility

The CEP125NP-7R2MC-H from Sumida America Components Inc. meets all substitution criteria within these allowed parameters.

Parameter Comparison

Engineering Selection Recommendations

The CEP125NP-7R2MC-H is a direct functional equivalent for the obsolete SRP1055-7R2M based on the following engineering criteria:

Electrical Performance: The substitute part exceeds the original specification in current rating (7.6 A vs. 7 A) and saturation current (7.8 A vs. 6.2 A), while providing superior DC resistance characteristics (14.6 mOhm vs. 15.5 mOhm). These improvements result in lower thermal dissipation and enhanced current handling capability.

Compliance & Availability: Both components maintain ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). The CEP125NP-7R2MC-H is classified as active product status with 1900 units in stock, ensuring supply chain continuity compared to the obsolete SRP1055-7R2M.

Temperature Consideration: The CEP125NP-7R2MC-H operates within -40°C to 125°C, which is narrower than the original -55°C to 150°C range. Applications requiring operation below -40°C or above 125°C must evaluate alternative substitutes or confirm that the narrower range is acceptable for the specific thermal environment.

Frequently Asked Questions (FAQ)

Q: Can the CEP125NP-7R2MC-H directly replace the SRP1055-7R2M in existing designs?

A: Yes, for applications operating within the -40°C to 125°C temperature range. The electrical parameters are compatible or superior. Verify that your application's thermal environment falls within this operating range before implementation.

Q: What is the primary difference between these two inductors?

A: The CEP125NP-7R2MC-H provides higher current rating, lower DC resistance, and higher saturation current, making it a performance-enhanced substitute. The trade-off is a narrower operating temperature range (-40°C to 125°C versus -55°C to 150°C).

Q: Are there any package or mounting differences?

A: Both components are surface mount inductors with ferrite shielded drum cores. Physical dimensions differ slightly (SRP1055-7R2M: 11.00mm x 9.35mm x 5.80mm; CEP125NP-7R2MC-H: 12.50mm x 12.50mm x 5.60mm). Verify PCB layout compatibility before substitution.

Q: Do both parts meet current environmental compliance standards?

A: Yes. Both the SRP1055-7R2M and CEP125NP-7R2MC-H are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity), meeting modern manufacturing and environmental requirements.

Q: What should I consider when selecting between these inductors?

A: Primary considerations are operating temperature range requirements and PCB layout constraints due to dimensional differences. If your application requires operation below -40°C or above 125°C, the CEP125NP-7R2MC-H is not suitable. For standard industrial and commercial temperature ranges, the substitute part offers improved electrical performance.