CSR0805FT91L0 Equivalent & Substitute Parts

Part Overview

The CSR0805FT91L0 is a 91 mOhms ±1% 0.25W thick film chip resistor in 0805 (2012 Metric) package manufactured by Stackpole Electronics Inc. This current sense resistor is designed for precision low-resistance applications requiring tight tolerance and stable performance across industrial temperature ranges. The part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Substiute Parts

CSR0805FT91L0

Stackpole Electronics IncIn Stock: 761CSR0805FT91L0 Datasheet

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ERJ-6BWFR091V

Panasonic Electronic ComponentsIn Stock: 7817ERJ-6BWFR091V Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CSR0805FT91L0 is determined by the following critical parameters:

• Resistance Value: 91 mOhms exact match required
• Tolerance: ±1% maximum tolerance required
• Package Type: 0805 (2012 Metric) form factor required for PCB footprint compatibility
• Composition: Thick film construction required for current sense application stability
• Operating Temperature Range: -55°C to 155°C minimum required
• RoHS Compliance: ROHS3 Compliant status required

The ERJ-6BWFR091V from Panasonic Electronic Components meets all substitution criteria. While this part features a higher power rating (0.5W versus 0.25W), this represents an upgrade capability that does not compromise the original application requirements. The identical resistance value, tolerance, package, composition, temperature range, and RoHS compliance status establish direct substitutability.

Parameter Comparison

Engineering Selection Recommendations

Both parts maintain active product status with full ROHS3 compliance and unlimited moisture sensitivity ratings. The ERJ-6BWFR091V provides additional qualification under AEC-Q200 automotive standards, which may be beneficial for applications requiring automotive-grade reliability assurance. The increased power rating of the substitute part (0.5W versus 0.25W) provides thermal margin without affecting electrical performance in the specified application. Physical height difference of 0.004" (0.10mm) is within typical PCB assembly tolerances for 0805 packages. Selection between these parts should be based on application-specific requirements for automotive qualification and thermal design margins.

Frequently Asked Questions (FAQ)

Q: Can ERJ-6BWFR091V replace CSR0805FT91L0 in existing designs?

A: Yes. Both parts share identical resistance value (91 mOhms), tolerance (±1%), package (0805), composition (thick film), and operating temperature range (-55°C to 155°C). The substitute part's higher power rating represents an upgrade that does not compromise original specifications.

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

A: The CSR0805FT91L0 is rated at 0.25W while ERJ-6BWFR091V is rated at 0.5W. In current sense applications, the higher power rating of the substitute provides additional thermal headroom. If the original design operates within 0.25W power dissipation limits, the substitute will perform identically with improved thermal margin.

Q: Are there physical compatibility concerns?

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

Q: What does AEC-Q200 qualification mean for the substitute part?

A: AEC-Q200 is an automotive industry standard for passive component reliability. The ERJ-6BWFR091V carries this qualification, indicating it meets automotive-grade testing and reliability requirements. This is optional for non-automotive applications but provides additional assurance for mission-critical designs.

Q: Are both parts RoHS compliant?

A: Yes. Both CSR0805FT91L0 and ERJ-6BWFR091V are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1), meeting environmental and regulatory requirements for commercial and industrial applications.