CSR1206FK43L0 Equivalent & Substitute Parts

Part Overview

The CSR1206FK43L0 is a 43 milliohm, ±1% tolerance, 0.5W thick film chip resistor in 1206 (3216 Metric) package manufactured by Stackpole Electronics Inc. This current sense resistor is designed for precision low-resistance applications requiring high accuracy and stable performance across industrial temperature ranges. The part is Active status and ROHS3 compliant. Substitute parts may be required due to inventory availability, supply chain considerations, or specific application requirements while maintaining equivalent electrical and mechanical performance.

Substiute Parts

CSR1206FK43L0

Stackpole Electronics IncIn Stock: 796CSR1206FK43L0 Datasheet

Current PartRFQ

RLP73M2BR043FTDF

TE Connectivity Passive ProductIn Stock: 4721RLP73M2BR043FTDF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CSR1206FK43L0 are qualified based on the following critical parameters:

• Resistance value: 43 mOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 0.5W minimum
• Package: 1206 (3216 Metric) form factor
• Composition: Thick film construction
• Application class: Current sense resistor
• Operating temperature range: -55°C to 155°C minimum
• Compliance: ROHS3 and REACH requirements

The RLP73M2BR043FTDF from TE Connectivity Passive Product meets all mandatory electrical and mechanical parameters for direct substitution in the CSR1206FK43L0 application.

Parameter Comparison

Engineering Selection Recommendations

Both the CSR1206FK43L0 and RLP73M2BR043FTDF are Active status components with identical ROHS3 and REACH compliance certifications. The parts are electrically and mechanically equivalent for current sense applications within the specified operating temperature range. The RLP73M2BR043FTDF exhibits a higher temperature coefficient (±400 ppm/°C versus ±100 ppm/°C), which may introduce slightly greater resistance variation across temperature extremes but remains within acceptable tolerances for standard current sensing circuits. Physical dimensions are within acceptable PCB layout tolerances, with the TE Connectivity part measuring 0.02" longer in length. Selection between these parts should be based on availability, supply chain requirements, and application-specific temperature stability needs.

Frequently Asked Questions (FAQ)

Q: Can RLP73M2BR043FTDF be used as a direct replacement for CSR1206FK43L0?

A: Yes. Both parts share identical resistance (43 mOhms), tolerance (±1%), power rating (0.5W), package type (1206), composition (thick film), and operating temperature range (-55°C to 155°C). Physical dimensions and termination count are equivalent for PCB assembly.

Q: What is the difference in temperature coefficient between these parts?

A: The CSR1206FK43L0 has a temperature coefficient of ±100 ppm/°C, while the RLP73M2BR043FTDF has ±400 ppm/°C. This means the TE Connectivity part will experience greater resistance variation across the full operating temperature range, though both remain within ±1% tolerance specifications.

Q: Are there physical dimension differences that affect PCB layout?

A: The RLP73M2BR043FTDF is 0.02" (0.05mm) longer in length (3.10mm versus 3.05mm). Both parts maintain identical width (0.061" / 1.55mm) and height (0.026" / 0.65mm). This minor difference is within standard PCB design tolerances and does not affect footprint compatibility.

Q: Do both parts meet compliance requirements?

A: Yes. Both CSR1206FK43L0 and RLP73M2BR043FTDF are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes.

Q: What packaging format is available for these parts?

A: Both parts are supplied in Tape & Reel (TR) format suitable for automated assembly processes.