CF18JA3K90 Equivalent & Substitute Parts

Part Overview

The CF18JA3K90 is a 3.9 kOhms ±5% 0.125W (1/8W) through-hole axial resistor manufactured by Stackpole Electronics Inc. This carbon film resistor features flame retardant coating and safety characteristics, designed for general-purpose applications requiring reliable performance across industrial temperature ranges. The part is currently active in production with full RoHS3 compliance. Substitute parts are identified to address inventory availability, packaging preferences, or application-specific power rating requirements while maintaining electrical and mechanical compatibility.

Substiute Parts

CF18JA3K90

Stackpole Electronics IncIn Stock: 821CF18JA3K90 Datasheet

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CFM14JA3K90

Stackpole Electronics IncIn Stock: 9133CFM14JA3K90 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CF18JA3K90 is determined by the following critical parameters:

• Resistance Value: Must be 3.9 kOhms
• Tolerance: Must be ±5%
• Composition: Must be Carbon Film
• Package Type: Must be Axial
• Temperature Coefficient: Must be 0 / -400ppm/°C
• Operating Temperature Range: Must be -55°C to 155°C
• Compliance: Must maintain RoHS3 and REACH status

The CFM14JA3K90 qualifies as a substitute part. While it features an upgraded power rating of 0.25W (1/4W) compared to the original 0.125W (1/8W), all other electrical and mechanical parameters remain identical. The increased power rating provides additional thermal margin and does not compromise compatibility in applications designed for the original part.

Parameter Comparison

Engineering Selection Recommendations

Both CF18JA3K90 and CFM14JA3K90 are active production parts with identical RoHS3 and REACH compliance certifications. Selection between these parts should be based on application power dissipation requirements and packaging availability. The CFM14JA3K90 offers higher power handling capacity at identical physical dimensions and electrical specifications, making it suitable for applications where thermal margin is beneficial. Both parts maintain full compliance with applicable regulatory standards and are suitable for industrial applications across the specified temperature range.

Frequently Asked Questions (FAQ)

Q: Can CFM14JA3K90 be used as a direct replacement for CF18JA3K90?

A: Yes. The CFM14JA3K90 maintains identical resistance, tolerance, composition, package type, temperature coefficient, and operating temperature range. The higher power rating (0.25W vs 0.125W) does not create compatibility issues in circuits designed for the original part.

Q: What is the primary difference between these two parts?

A: The power rating differs. CF18JA3K90 is rated at 0.125W (1/8W), while CFM14JA3K90 is rated at 0.25W (1/4W). All other specifications remain identical.

Q: Are the physical dimensions identical?

A: Yes. Both parts share the same axial package dimensions of 0.067" diameter by 0.130" length (1.70mm x 3.30mm).

Q: Do both parts meet the same compliance standards?

A: Yes. Both CF18JA3K90 and CFM14JA3K90 are ROHS3 compliant and REACH unaffected.

Q: What packaging formats are available?

A: CF18JA3K90 is supplied in Tape & Box (TB) packaging. CFM14JA3K90 is supplied in Cut Tape (CT) packaging. Packaging format selection depends on assembly process requirements.