CSR1206JT68L0 Equivalent & Substitute Parts

Part Overview

The CSR1206JT68L0 is a 68 milliohm, ±5% 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 reliable performance across industrial temperature ranges. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained while offering enhanced tolerance, automotive qualification, or improved availability.

Substiute Parts

CSR1206JT68L0

Stackpole Electronics IncIn Stock: 763CSR1206JT68L0 Datasheet

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RCWE120668L0FKEA

Vishay DaleIn Stock: 20389RCWE120668L0FKEA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CSR1206JT68L0 is determined by strict adherence to the following parameters:

Critical Parameters (Must Match):

• Resistance value: 68 mOhms
• Package type: 1206 (3216 Metric)
• Power rating: 0.5W minimum
• Composition: Thick Film
• Operating temperature range: -55°C to 155°C minimum
• RoHS3 compliance

Allowable Variations:

• Tolerance may be equal or tighter (±5% or better)
• Temperature coefficient: ±100ppm/°C
• Additional features (automotive qualification, moisture resistance) do not disqualify substitution
• Physical dimensions within standard 1206 tolerances

The RCWE120668L0FKEA qualifies as a direct substitute by meeting all critical parameters while offering improved tolerance (±1% versus ±5%) and automotive AEC-Q200 qualification.

Parameter Comparison

Engineering Selection Recommendations

The RCWE120668L0FKEA serves as a qualified substitute for the CSR1206JT68L0 based on the following engineering criteria:

Electrical Compatibility: Both parts maintain identical resistance values, power ratings, and temperature coefficients. The substitute's tighter tolerance (±1%) provides superior accuracy compared to the original specification (±5%), making it suitable for applications requiring enhanced precision without circuit redesign.

Mechanical Compatibility: Package dimensions remain within 1206 standard specifications. The substitute's slightly larger physical dimensions (0.122" L x 0.063" W versus 0.120" L x 0.061" W) and height (0.028" versus 0.026") fall within acceptable PCB layout tolerances for standard 1206 footprints.

Compliance and Certification: Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating. The substitute carries AEC-Q200 automotive qualification, which does not restrict use in non-automotive applications and indicates enhanced reliability testing and manufacturing controls.

Product Availability: The substitute demonstrates significantly higher inventory availability (20,318 pieces versus 742 pieces), supporting supply chain continuity and cost optimization.

Frequently Asked Questions (FAQ)

Q: Can the RCWE120668L0FKEA replace the CSR1206JT68L0 in existing designs without PCB modification?

A: Yes. Both parts use identical 1206 package footprints. The substitute's dimensions fall within standard 1206 tolerances and are compatible with existing PCB layouts designed for the original part.

Q: What is the significance of the ±1% tolerance on the substitute part?

A: The tighter tolerance reduces resistance variation from ±3.4 mOhms (±5% of 68 mOhms) to ±0.68 mOhms (±1% of 68 mOhms). This improves measurement accuracy in current sensing applications where precision is critical.

Q: Does AEC-Q200 qualification on the substitute affect its use in non-automotive applications?

A: No. AEC-Q200 qualification indicates enhanced reliability testing and stricter manufacturing controls. Parts meeting automotive standards are fully compatible with industrial and commercial applications.

Q: Are the physical dimension differences between these parts significant?

A: The differences are minimal and within standard 1206 package tolerances. The substitute is 0.002" longer, 0.002" wider, and 0.002" taller. These variations do not affect PCB assembly, soldering, or electrical performance.

Q: What is the temperature coefficient and how does it affect circuit performance?

A: Both parts specify ±100ppm/°C temperature coefficient. This means resistance changes approximately 0.01% per degree Celsius across the -55°C to 155°C operating range. For a 68 mOhm resistor, this represents a maximum change of 0.0068 mOhms per degree Celsius.

Q: Are both parts RoHS compliant?

A: Yes. Both the CSR1206JT68L0 and RCWE120668L0FKEA maintain ROHS3 compliance and are suitable for applications requiring lead-free, halogen-free construction.