CSR0805FT27L0 Equivalent & Substitute Parts

Part Overview

The CSR0805FT27L0 is a 27 mOhm ±1% thick film chip resistor in 0805 (2012 Metric) package rated for 0.25W (1/4W) power dissipation. Designed for current sensing applications, this component operates across -55°C to 155°C with a temperature coefficient of ±200ppm/°C. The part is ROHS3 compliant and carries unlimited moisture sensitivity level (MSL 1). Identifying equivalent and substitute parts is necessary when the primary part experiences supply constraints, inventory limitations, or when design requirements permit higher power ratings or enhanced automotive qualification.

Substiute Parts

CSR0805FT27L0

Stackpole Electronics IncIn Stock: 914CSR0805FT27L0 Datasheet

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ERJ-6BWFR027V

Panasonic Electronic ComponentsIn Stock: 18034ERJ-6BWFR027V Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CSR0805FT27L0 is determined by the following critical parameters:

Resistance value must be 27 mOhms with ±1% tolerance to maintain circuit accuracy in current sensing applications. Package must remain 0805 (2012 Metric) to ensure PCB footprint compatibility. Composition must be thick film to preserve electrical characteristics. Operating temperature range must span -55°C to 155°C minimum. Power rating may be equal to or greater than 0.25W, as higher ratings provide thermal margin without affecting circuit function. Temperature coefficient must not exceed ±200ppm/°C to maintain measurement stability.

The ERJ-6BWFR027V qualifies as a substitute because it matches all critical parameters: identical 27 mOhm resistance at ±1% tolerance, same 0805 package, thick film composition, identical operating temperature range, and equivalent temperature coefficient (0/+200ppm/°C). The substitute offers an upgraded power rating of 0.5W (1/2W) and includes automotive AEC-Q200 qualification, providing enhanced reliability for demanding applications.

Parameter Comparison

Engineering Selection Recommendations

The ERJ-6BWFR027V is a direct substitute for the CSR0805FT27L0 in current sensing applications. Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols. The substitute part carries AEC-Q200 automotive qualification, which provides additional reliability assurance for applications requiring automotive-grade components. The increased power rating of 0.5W versus 0.25W offers thermal headroom without introducing circuit incompatibility. The maximum seated height difference of 0.004" (0.10mm) remains within typical PCB assembly tolerances for 0805 packages. Selection between these parts should be based on supply availability, cost considerations, and whether automotive qualification is required for the end application.

Frequently Asked Questions (FAQ)

Q: Can the ERJ-6BWFR027V replace the CSR0805FT27L0 in existing designs?

A: Yes. Both parts share identical resistance (27 mOhms), tolerance (±1%), package (0805), composition (thick film), and operating temperature range (-55°C to 155°C). The substitute's higher power rating (0.5W vs 0.25W) and automotive qualification do not create incompatibility.

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

A: The CSR0805FT27L0 is rated for 0.25W dissipation, while the ERJ-6BWFR027V is rated for 0.5W. In current sensing circuits, the resistor dissipates power proportional to the square of the current. The higher rating of the substitute provides thermal margin and reduces junction temperature rise, improving long-term reliability without affecting electrical performance.

Q: Are there package footprint compatibility concerns?

A: Both parts use the 0805 (2012 Metric) package with identical length (0.079") and width (0.049"). The seated height differs by 0.004" (0.10mm), which is negligible for standard PCB assembly processes and does not affect footprint compatibility.

Q: Does the temperature coefficient difference affect circuit performance?

A: The CSR0805FT27L0 specifies ±200ppm/°C, while the ERJ-6BWFR027V specifies 0/+200ppm/°C. Both remain within acceptable limits for current sensing applications. The substitute's asymmetrical coefficient (0 to +200ppm/°C) may provide slightly better performance in certain temperature profiles, but both parts maintain measurement accuracy across the full operating range.

Q: Is AEC-Q200 qualification required for this application?

A: AEC-Q200 is an automotive reliability standard. The substitute part carries this qualification, while the main part does not. If the design targets automotive or high-reliability applications, the substitute provides additional assurance. For non-automotive applications, both parts are functionally equivalent.

Q: Can these parts be used interchangeably on the same PCB assembly line?

A: Yes, both parts are compatible with standard 0805 pick-and-place equipment and reflow soldering processes. The identical package dimensions and termination count ensure seamless integration into existing assembly workflows.