CSR25120R05F Equivalent & Substitute Parts

Part Overview

The CSR25120R05F is a 50 mOhms ±1% 1W chip resistor in 2512 (6432 Metric) package manufactured by Riedon. This current sense, non-inductive metal element resistor is designed for precision low-resistance applications requiring tight tolerance and thermal stability. The part is classified as Obsolete, necessitating identification of suitable alternatives for ongoing production and maintenance applications. Substitute parts must maintain electrical equivalence in resistance value, tolerance, and package form factor while meeting current availability and compliance requirements.

Substiute Parts

CSR25120R05F

RiedonIn Stock: 1156CSR25120R05F Datasheet

Current PartRFQ

CSRL3-0R05F2

RiedonIn Stock: 12147CSRL3-0R05F2 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CSR25120R05F is determined by the following critical parameters:

• Resistance value: 50 mOhms ±1%
• Package form factor: 2512 (6432 Metric)
• Composition: Metal Element
• Features: Current Sense, Non-Inductive
• Operating temperature range: -55°C to 170°C minimum
• Compliance: ROHS3 Compliant

The CSRL3-0R05F2 qualifies as a direct substitute based on matching resistance, tolerance, package, composition, and feature set. The primary difference is power rating (3W versus 1W), which represents an upgrade in thermal capability and does not restrict substitution in applications designed for the original 1W part.

Parameter Comparison

Engineering Selection Recommendations

The CSRL3-0R05F2 is the qualified substitute for the obsolete CSR25120R05F. Both parts are manufactured by Riedon and maintain identical electrical specifications for resistance, tolerance, and operating temperature range. The substitute part carries Active product status with significantly higher inventory availability (12,084 pcs versus 1,104 pcs), ensuring supply chain continuity.

The 3W power rating of the CSRL3-0R05F2 exceeds the original 1W specification, providing enhanced thermal margin without altering electrical performance in the circuit. Both parts maintain ROHS3 compliance and MSL 1 rating, satisfying regulatory and environmental requirements.

Physical dimensions remain compatible within the 2512 package specification, with negligible variation in length and width (6.40mm x 3.20mm versus 6.35mm x 3.18mm) and identical height (0.90mm maximum).

Frequently Asked Questions (FAQ)

Q: Can the CSRL3-0R05F2 be used as a direct replacement for the CSR25120R05F?

A: Yes. Both parts share identical resistance (50 mOhms), tolerance (±1%), package (2512), composition (Metal Element), and operating temperature range (-55°C to 170°C). The higher power rating (3W) does not restrict substitution in applications designed for 1W operation.

Q: What is the significance of the power rating difference?

A: The CSRL3-0R05F2 is rated for 3W dissipation compared to the original 1W rating. This represents increased thermal capability and does not create incompatibility. Applications requiring only 1W dissipation will operate within the substitute part's specifications.

Q: Are there physical compatibility concerns with the 2512 package?

A: No. Both parts conform to the 2512 (6432 Metric) package standard. Dimensional variations (length 6.40mm versus 6.35mm, width 3.20mm versus 3.18mm) fall within standard package tolerances and do not affect PCB footprint compatibility.

Q: What is the inventory status of each part?

A: The original CSR25120R05F (Obsolete) has 1,104 pcs available. The substitute CSRL3-0R05F2 (Active) has 12,084 pcs in stock, providing superior supply chain availability.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 Compliant, REACH Unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, satisfying identical regulatory and environmental requirements.