CSR0805FT43L0 Equivalent & Substitute Parts

Part Overview

The CSR0805FT43L0 is a 43 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 953 units in current inventory stock.

Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this resistor category.

Substiute Parts

CSR0805FT43L0

Stackpole Electronics IncIn Stock: 991CSR0805FT43L0 Datasheet

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ERJ-6BWFR043V

Panasonic Electronic ComponentsIn Stock: 17941ERJ-6BWFR043V Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CSR0805FT43L0 is determined by the following critical parameters:

• Resistance value: 43 mOhms
• Tolerance: ±1%
• Package type: 0805 (2012 Metric)
• Composition: Thick Film
• Operating temperature range: -55°C to 155°C
• Moisture sensitivity level: 1 (Unlimited)
• RoHS compliance: ROHS3 Compliant

The ERJ-6BWFR043V meets all these core requirements. While this substitute features a higher power rating (0.5W versus 0.25W), this represents a design upgrade that maintains full backward compatibility. The increased power dissipation capability does not compromise circuit performance in applications designed for the original 0.25W specification.

Parameter Comparison

Engineering Selection Recommendations

The ERJ-6BWFR043V qualifies as a direct substitute for the CSR0805FT43L0 based on matching electrical specifications and mechanical compatibility. Both parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating.

The ERJ-6BWFR043V carries AEC-Q200 automotive qualification, which provides additional reliability assurance beyond the base specification. The higher power rating (0.5W) offers improved thermal margin in current sense applications without affecting circuit design or performance.

The maximum seated height difference of 0.004" (0.10mm) is within typical PCB assembly tolerances and does not present mechanical interference concerns for standard 0805 footprints.

Frequently Asked Questions (FAQ)

Q: Can the ERJ-6BWFR043V replace the CSR0805FT43L0 in existing designs?

A: Yes. Both parts share identical resistance (43 mOhms), tolerance (±1%), package (0805), and operating temperature range (-55°C to 155°C). The substitute's higher power rating provides additional thermal capability without requiring circuit modifications.

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

A: The CSR0805FT43L0 is rated at 0.25W while the ERJ-6BWFR043V is rated at 0.5W. In applications designed for 0.25W operation, the substitute will operate at lower junction temperature, extending component life and improving reliability margins.

Q: Are there mechanical compatibility concerns?

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

Q: What compliance certifications apply to both parts?

A: Both the CSR0805FT43L0 and ERJ-6BWFR043V are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. The ERJ-6BWFR043V additionally carries AEC-Q200 automotive qualification.

Q: Are the temperature coefficients equivalent?

A: The CSR0805FT43L0 specifies ±200ppm/°C while the ERJ-6BWFR043V specifies 0/+200ppm/°C. Both operate across the same temperature range (-55°C to 155°C) with comparable thermal stability for current sense applications.