CSR25120R02F Equivalent & Substitute Parts

Part Overview

The CSR25120R02F is a 20 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, making identification of suitable substitutes essential for ongoing production and maintenance requirements.

Substiute Parts

CSR25120R02F

RiedonIn Stock: 929CSR25120R02F Datasheet

Current PartRFQ

CSRL3-0R02F1

RiedonIn Stock: 13423CSRL3-0R02F1 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CSR25120R02F is determined by the following critical parameters:

• Resistance Value: Must be 20 mOhms (0.02 Ohm)
• Tolerance: Must be ±1%
• Package / Case: Must be 2512 (6432 Metric)
• Composition: Must be Metal Element
• Features: Must include Current Sense and Non-Inductive characteristics
• Operating Temperature Range: Must support -55°C to 170°C
• Compliance: Must maintain ROHS3 compliance and MSL 1 rating

The CSRL3-0R02F1 qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. The primary difference is an increased power rating (3W versus 1W), which represents an enhancement rather than a limitation for the original application.

Parameter Comparison

Engineering Selection Recommendations

The CSRL3-0R02F1 is the appropriate substitute for the obsolete CSR25120R02F. Both parts are manufactured by Riedon and maintain identical electrical specifications for resistance, tolerance, and temperature coefficient. The substitute part carries Active product status, ensuring continued availability and supply chain reliability.

The increased power rating of the CSRL3-0R02F1 (3W versus 1W) provides enhanced thermal performance without altering the electrical characteristics required for current sense applications. Both parts maintain ROHS3 compliance and MSL 1 rating, satisfying regulatory and environmental requirements.

The physical package dimensions are equivalent within manufacturing tolerances, supporting direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the CSRL3-0R02F1 be used as a direct replacement for the CSR25120R02F?

A: Yes. Both parts share identical resistance (20 mOhms), tolerance (±1%), package (2512), composition (Metal Element), and operating temperature range (-55°C to 170°C). The substitute part's higher power rating (3W) is compatible with applications designed for the original 1W part.

Q: What is the primary reason for substitution?

A: The CSR25120R02F is classified as Obsolete. The CSRL3-0R02F1 is an Active product from the same manufacturer, ensuring long-term availability and supply continuity.

Q: Are there physical dimension differences between these parts?

A: Both parts use the 2512 (6432 Metric) package. Dimensions are equivalent within standard manufacturing tolerances (CSR25120R02F: 0.250" L x 0.125" W; CSRL3-0R02F1: 0.252" L x 0.126" W). Height is identical at 0.035" maximum.

Q: Do compliance certifications remain unchanged?

A: Yes. Both parts are ROHS3 compliant, REACH Unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. ECCN and HTSUS classifications are identical.

Q: Is the higher power rating of the substitute part a concern?

A: No. A higher power rating indicates improved thermal capability and does not negatively impact circuit performance. The part will operate within the same electrical parameters as the original.