CSR25120R01F Equivalent & Substitute Parts

Part Overview

The CSR25120R01F is a 10 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. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Resistance	10 mOhms (0.01 Ohm)
Tolerance	±1%
Power Rating	1W
Package / Case	2512 (6432 Metric)
Composition	Metal Element
Features	Current Sense, Non-Inductive
Temperature Coefficient	±75 ppm/°C
Operating Temperature Range	-55°C ~ 170°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CSR25120R01F is determined by strict equivalence in the following parameters:

Resistance value: 10 mOhms
Tolerance: ±1%
Package / Case: 2512 (6432 Metric)
Composition: Metal Element
Features: Current Sense, Non-Inductive

Substitute parts are grouped into two categories:

Direct Substitutes (Same Power Rating - 1W): Parts with identical 1W power rating and matching all core electrical parameters. These provide pin-for-pin and functional equivalence.

Upgraded Substitutes (Higher Power Rating - 2W or 3W): Parts with increased power dissipation capability while maintaining identical resistance, tolerance, package, and core features. These are suitable for applications where the original 1W rating is adequate but higher thermal margin is desired.

Parameter Comparison

Part Number	Manufacturer	Resistance	Tolerance	Power (W)	Package	Temp Coeff	Operating Temp	Features	Status
CSR25120R01F	Riedon	10 mOhms	±1%	1W	2512	±75 ppm/°C	-55°C ~ 170°C	Current Sense, Non-Inductive	Obsolete
CSRL3-0R01F1	Riedon	10 mOhms	±1%	3W	2512	±75 ppm/°C	-55°C ~ 170°C	Current Sense, Non-Inductive	Active
CSRL3-0R01F8	Riedon	10 mOhms	±1%	3W	2512	±75 ppm/°C	-55°C ~ 170°C	Current Sense, Non-Inductive	Active
ERJ-MS4HF10MU	Panasonic Electronic Components	10 mOhms	±1%	2W	2512	±75 ppm/°C	-65°C ~ 170°C	Automotive AEC-Q200, Current Sense, Moisture Resistant	Active
WSL2512R0100FEA	Vishay Dale	10 mOhms	±1%	1W	2512	±75 ppm/°C	-65°C ~ 170°C	Automotive AEC-Q200, Current Sense, Moisture Resistant, Pulse Withstanding	Active
WSL2512R0100FEA18	Vishay Dale	10 mOhms	±1%	2W	2512	±75 ppm/°C	-65°C ~ 170°C	Automotive AEC-Q200, Current Sense, Moisture Resistant, Pulse Withstanding	Active
WSLS2512R0100FHEB	Vishay Dale	10 mOhms	±1%	1W	2512	±75 ppm/°C	-65°C ~ 170°C	Automotive AEC-Q200, Current Sense, Moisture Resistant, Pulse Withstanding	Active
WSLT2512R0100FEA	Vishay Dale	10 mOhms	±1%	1W	2512	±75 ppm/°C	-65°C ~ 275°C	Automotive AEC-Q200, Current Sense, Moisture Resistant, Pulse Withstanding	Active

Engineering Selection Recommendations

For Direct Replacement (1W Rating):

WSL2512R0100FEA, WSLS2512R0100FHEB, and WSLT2512R0100FEA from Vishay Dale are active production alternatives with identical 1W power rating. All three carry AEC-Q200 automotive qualification and moisture-resistant construction. WSLT2512R0100FEA extends the upper operating temperature to 275°C, suitable for high-temperature applications.

For Upgraded Thermal Performance (2W Rating):

WSL2512R0100FEA18 (Vishay Dale) and ERJ-MS4HF10MU (Panasonic) provide 2W power dissipation with maintained electrical specifications. Both are AEC-Q200 qualified and active production parts.

For Maximum Thermal Margin (3W Rating):

CSRL3-0R01F1 and CSRL3-0R01F8 from Riedon offer 3W power rating while maintaining the same manufacturer lineage as the original part. Both are active production alternatives.

All substitute parts maintain ROHS3 compliance, MSL 1 rating, and identical resistance, tolerance, and package specifications.

Frequently Asked Questions (FAQ)

Q: Can I use a 2W or 3W rated substitute in place of the 1W CSR25120R01F?

A: Yes. Higher power-rated parts with identical resistance, tolerance, and package are electrically equivalent. The increased power rating provides additional thermal margin without affecting circuit performance. Physical dimensions remain compatible with 2512 package specifications.

Q: What is the difference between the Riedon CSRL3 series and the original CSR25120R01F?

A: The CSRL3 series offers 3W power rating compared to the original 1W rating. All other electrical parameters—resistance, tolerance, temperature coefficient, and operating range—are identical. Both are metal element, non-inductive current sense resistors in 2512 package.

Q: Are the Vishay Dale WSL series parts compatible with the original design?

A: Yes. WSL series parts match the 10 mOhms resistance, ±1% tolerance, and 2512 package. They include additional features such as anti-sulfur coating, pulse withstanding capability, and AEC-Q200 automotive qualification. Operating temperature range extends to -65°C, providing broader environmental coverage.

Q: What is the significance of AEC-Q200 qualification on substitute parts?

A: AEC-Q200 is an automotive electronics qualification standard. Substitute parts carrying this rating have undergone rigorous reliability testing for automotive applications. This qualification is not present on the original CSR25120R01F but is available on active production alternatives.

Q: Can I mix different substitute parts in the same design?

A: Yes, provided all parts meet the circuit's electrical requirements. All listed substitutes maintain identical resistance, tolerance, and package specifications. Verify that the selected power rating and operating temperature range are appropriate for your application.

Q: What is the difference between cut tape and tape & reel packaging?

A: Cut Tape (CT) & Digi-Reel packaging is suitable for manual assembly and small-volume production. Tape & Reel (TR) packaging is optimized for automated pick-and-place assembly. Both formats contain identical components; packaging selection depends on assembly process requirements.

Q: Why does WSLT2512R0100FEA have a higher maximum operating temperature (275°C)?

A: WSLT series resistors are designed for high-temperature applications. The extended upper temperature limit of 275°C accommodates designs requiring operation in elevated thermal environments while maintaining the same electrical performance and 1W power rating.

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