CF14JA4R70 Equivalent & Substitute Parts

Part Overview

The CF14JA4R70 is a 4.7 Ohm, ±5% tolerance, 1/4W (0.25W) through-hole axial resistor manufactured by Stackpole Electronics Inc. This carbon film resistor features flame retardant coating and safety characteristics, designed for general-purpose electronic applications requiring reliable fixed resistance values. The part is currently active in production with ROHS3 compliance and maintains broad operating temperature range from -55°C to 155°C. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit designs.

Substiute Parts

CF14JA4R70

Stackpole Electronics IncIn Stock: 822CF14JA4R70 Datasheet

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CFM12JT4R70

Stackpole Electronics IncIn Stock: 18888CFM12JT4R70 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CF14JA4R70 is determined by the following critical parameters:

• Resistance Value: Must be 4.7 Ohms
• Tolerance: Must be ±5% or tighter
• Composition: Carbon film construction
• Package: Axial through-hole configuration
• Temperature Coefficient: ±400ppm/°C
• Operating Temperature Range: -55°C to 155°C minimum
• Compliance: ROHS3 compliant

The CFM12JT4R70 qualifies as a substitute despite its higher power rating (0.5W vs 0.25W) because all critical electrical parameters match, and the increased power dissipation capability provides design margin without affecting circuit performance. The axial package remains identical, and all environmental and compliance specifications are maintained.

Parameter Comparison

Engineering Selection Recommendations

Both the CF14JA4R70 and CFM12JT4R70 are active production parts with identical compliance certifications (ROHS3 compliant, REACH unaffected). Selection between these parts depends on circuit power dissipation requirements:

• CF14JA4R70: Select when the application requires a 1/4W rated resistor and power dissipation does not exceed 0.25W.
• CFM12JT4R70: Select when higher power dissipation margin is required or when the application demands a 1/2W rated component. The increased power rating provides additional thermal headroom without altering electrical performance.

Both parts maintain identical resistance value, tolerance, temperature coefficient, and operating temperature range. Physical dimensions differ slightly due to the power rating difference, but both retain the standard axial through-hole package configuration suitable for PCB mounting.

Frequently Asked Questions (FAQ)

Q: Can CFM12JT4R70 directly replace CF14JA4R70 in existing designs?

A: Yes. The CFM12JT4R70 provides identical electrical performance with a higher power rating. The axial package remains compatible with standard through-hole PCB layouts. Physical dimensions differ marginally (0.256" vs 0.236" length), but this does not affect circuit functionality or board layout in typical applications.

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

A: The power rating differs: CF14JA4R70 is rated at 0.25W (1/4W), while CFM12JT4R70 is rated at 0.5W (1/2W). All other electrical specifications—resistance, tolerance, temperature coefficient, and operating temperature range—are identical.

Q: Are both parts suitable for high-temperature applications?

A: Yes. Both parts operate across the same temperature range of -55°C to 155°C with a temperature coefficient of ±400ppm/°C, making them suitable for industrial and automotive environments within this range.

Q: Do these parts meet current compliance requirements?

A: Yes. Both CF14JA4R70 and CFM12JT4R70 are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component manufacturing.

Q: Which part should be selected for new designs?

A: For new designs, CFM12JT4R70 is preferred when power dissipation permits, as it provides additional thermal margin and maintains higher inventory availability. CF14JA4R70 remains appropriate for space-constrained applications where the lower power rating is sufficient.