CF18JA8R20 Equivalent & Substitute Parts

Part Overview

The CF18JA8R20 is an 8.2 Ohm ±5% 1/8W axial through-hole resistor manufactured by Stackpole Electronics Inc. This carbon film resistor features flame retardant coating and safety characteristics, designed for general-purpose electronic applications requiring precise resistance values in compact form factors. The part maintains Active product status with 742 units in current inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit designs, particularly when higher power ratings or alternative packaging formats are required.

Substiute Parts

CF18JA8R20

Stackpole Electronics IncIn Stock: 794CF18JA8R20 Datasheet

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CFM14JT8R20

Stackpole Electronics IncIn Stock: 13999CFM14JT8R20 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The CFM14JT8R20 qualifies as a substitute for the CF18JA8R20 based on the following matching electrical and mechanical parameters:

• Identical resistance value: 8.2 Ohms
• Identical tolerance: ±5%
• Identical composition: Carbon Film
• Identical package type: Axial
• Identical temperature coefficient: ±400ppm/°C
• Identical operating temperature range: -55°C to 155°C
• Identical RoHS compliance: ROHS3 Compliant

The primary difference is the power rating: CFM14JT8R20 provides 0.25W (1/4W) versus the original 0.125W (1/8W). This represents an upgrade in power dissipation capability while maintaining all other electrical and mechanical specifications. The axial package dimensions remain consistent across both parts.

Parameter Comparison

Engineering Selection Recommendations

Both CF18JA8R20 and CFM14JT8R20 maintain Active product status and full ROHS3 compliance. Selection between these parts depends on circuit power dissipation requirements. The CF18JA8R20 is suitable for applications with power dissipation up to 0.125W. The CFM14JT8R20 provides increased thermal headroom with 0.25W capability, making it applicable to circuits requiring higher power handling at the same 8.2 Ohm resistance value. Both parts share identical electrical characteristics including tolerance, temperature coefficient, and operating temperature range, ensuring functional equivalence in resistance-critical applications. Packaging format differs between Tape & Box and Cut Tape configurations; selection should align with assembly and procurement workflows.

Frequently Asked Questions (FAQ)

Q: Can CFM14JT8R20 directly replace CF18JA8R20 in existing designs?

A: Yes. Both parts provide identical 8.2 Ohm resistance at ±5% tolerance with matching temperature coefficients and operating ranges. The CFM14JT8R20 offers higher power rating (0.25W vs 0.125W), making it suitable for applications where the original part operates within or below its thermal limits.

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

A: The power rating differs: CF18JA8R20 is rated at 0.125W (1/8W), while CFM14JT8R20 is rated at 0.25W (1/4W). All other electrical and mechanical specifications remain identical.

Q: Are there packaging considerations when substituting?

A: Yes. CF18JA8R20 is supplied in Tape & Box format, while CFM14JT8R20 is supplied in Cut Tape format. Both use axial package configuration with identical physical dimensions, but procurement and assembly processes may differ based on packaging format.

Q: Do both parts meet the same compliance standards?

A: Yes. Both CF18JA8R20 and CFM14JT8R20 are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with identical HTSUS codes.

Q: When should I use the higher power-rated substitute?

A: Use CFM14JT8R20 when circuit analysis indicates power dissipation approaching or exceeding 0.125W, or when design margins require additional thermal capacity at the 8.2 Ohm resistance value.