CF18JT4R70 Equivalent & Substitute Parts

Part Overview

The CF18JT4R70 is a 4.7 Ohm, 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 precision resistance values with ±5% tolerance. The part maintains Active product status with 880 units currently in stock. Substitute parts are identified to address application requirements where higher power dissipation capability or alternative packaging formats are necessary while maintaining electrical and mechanical compatibility.

Substiute Parts

CF18JT4R70

Stackpole Electronics IncIn Stock: 937CF18JT4R70 Datasheet

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CFM14JT4R70

Stackpole Electronics IncIn Stock: 10627CFM14JT4R70 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CF18JT4R70 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Resistance Value: 4.7 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Composition: Carbon Film (exact match required)
• Temperature Coefficient: ±400ppm/°C (exact match required)
• Operating Temperature Range: -55°C to 155°C (exact match required)
• Package Type: Axial (exact match required)
• Physical Dimensions: 0.067" Dia x 3.30mm length (exact match required)
• Terminations: 2 (exact match required)
• Compliance: ROHS3 Compliant, REACH Unaffected (exact match required)

Allowable Variation Parameters:

• Power Rating: May increase from 0.125W (1/8W) to higher ratings (0.25W or greater) for enhanced thermal capability
• Packaging Format: May vary from Tape & Reel (TR) to Cut Tape (CT) or other standard formats
• Inventory Status: No restriction on substitute availability

The CFM14JT4R70 qualifies as a direct substitute based on matching all mandatory parameters while providing increased power dissipation capability (0.25W vs. 0.125W).

Parameter Comparison

Engineering Selection Recommendations

Both the CF18JT4R70 and CFM14JT4R70 maintain Active product status and full compliance with ROHS3 and REACH requirements. Selection between these parts is determined by circuit power dissipation requirements:

CF18JT4R70 Selection Criteria:

• Applications with power dissipation not exceeding 0.125W across the 4.7 Ohm resistor
• Space-constrained designs where 1/8W rating is sufficient
• Tape & Reel packaging preferred for automated assembly processes

CFM14JT4R70 Selection Criteria:

• Applications with power dissipation between 0.125W and 0.25W across the 4.7 Ohm resistor
• Designs requiring thermal margin above the 1/8W specification
• Cut Tape packaging acceptable for assembly operations
• Higher inventory availability (10,611 units vs. 880 units)

Both parts are electrically and mechanically interchangeable within their respective power ratings due to identical resistance, tolerance, temperature coefficient, operating range, and physical dimensions.

Frequently Asked Questions (FAQ)

Q: Can CFM14JT4R70 replace CF18JT4R70 in any application?

A: CFM14JT4R70 is a direct substitute for CF18JT4R70 in all applications where the circuit power dissipation does not exceed 0.25W. The higher power rating of CFM14JT4R70 (0.25W vs. 0.125W) provides additional thermal capability without affecting electrical performance. Physical dimensions and mounting characteristics are identical.

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

A: The primary difference is power rating. CF18JT4R70 is rated for 0.125W (1/8W) dissipation, while CFM14JT4R70 is rated for 0.25W (1/4W). All other electrical parameters—resistance, tolerance, temperature coefficient, and operating range—are identical. Packaging format differs (Tape & Reel vs. Cut Tape).

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.067" diameter by 0.130" length (1.70mm x 3.30mm). They are mechanically interchangeable on PCBs and in through-hole applications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both CF18JT4R70 and CFM14JT4R70 are ROHS3 Compliant and REACH Unaffected, meeting identical regulatory requirements.

Q: Which part should be selected for a new design?

A: For new designs, CFM14JT4R70 is preferred due to higher power rating providing design margin, greater inventory availability, and identical electrical and mechanical characteristics. CF18JT4R70 remains suitable for applications with confirmed power dissipation below 0.125W.

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) and Cut Tape (CT) packaging formats are assembly convenience options only. Electrical performance and component specifications are identical regardless of packaging format.