CF14JA300R Equivalent & Substitute Parts

Part Overview

The CF14JA300R is a 300 Ohm, ±5% tolerance, 1/4W 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 reliable passive component performance across industrial and commercial temperature ranges. The part is Active status and ROHS3 compliant. Substitute parts are identified to address inventory availability, packaging format preferences, or power rating requirements while maintaining electrical and mechanical compatibility within specified parameters.

Substiute Parts

CF14JA300R

Stackpole Electronics IncIn Stock: 1175CF14JA300R Datasheet

Current PartRFQ

CFM12JT300R

Stackpole Electronics IncIn Stock: 12770CFM12JT300R Datasheet

UpgradeRFQ

CFM14JT300R

Stackpole Electronics IncIn Stock: 12814CFM14JT300R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CF14JA300R are qualified based on the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Resistance value: 300 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Composition: Carbon Film (exact match required)
• Temperature Coefficient: 0 / -400ppm/°C (exact match required)
• Operating Temperature Range: -55°C to 155°C (exact match required)

Mechanical Compatibility Criteria:

• Package Type: Axial (exact match required)
• Number of Terminations: 2 (exact match required)

Allowed Variation Parameters:

• Power Rating: May vary (0.25W or 0.5W acceptable; higher power rating provides design margin)
• Packaging Format: Tape & Box (TB) or Cut Tape (CT) acceptable
• Series Designation: CF or CFM acceptable (same manufacturer, same product line)

The substitute parts CFM12JT300R and CFM14JT300R meet all electrical specifications and mechanical requirements. CFM12JT300R provides increased power dissipation capability at 0.5W. CFM14JT300R maintains identical power rating and physical footprint characteristics.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain Active product status and full ROHS3 and REACH compliance. Selection between CF14JA300R, CFM12JT300R, and CFM14JT300R is determined by application requirements and packaging availability:

CF14JA300R: Primary specification. Use when Tape & Box packaging format is required and 0.25W power rating is sufficient for circuit design.

CFM12JT300R: Use when higher power dissipation margin is required (0.5W rating vs. 0.25W) or when Cut Tape packaging format is preferred for automated assembly. Electrical and thermal characteristics remain compatible with CF14JA300R applications.

CFM14JT300R: Manufacturer-recommended substitute. Maintains identical power rating (0.25W) and electrical specifications as CF14JA300R while offering Cut Tape packaging format. Represents direct functional equivalent with packaging format variation.

Frequently Asked Questions (FAQ)

Q: Can CFM12JT300R (0.5W) be used in place of CF14JA300R (0.25W)?

A: Yes. The CFM12JT300R provides higher power dissipation capability and is electrically and mechanically compatible. The increased power rating does not degrade performance in applications designed for 0.25W resistors; it provides additional thermal margin.

Q: What is the difference between Tape & Box (TB) and Cut Tape (CT) packaging?

A: Tape & Box packaging includes a full reel with protective box for manual or bulk storage. Cut Tape packaging provides pre-cut lengths suitable for automated pick-and-place assembly equipment. Electrical and mechanical specifications are identical.

Q: Are the CF and CFM series interchangeable?

A: Yes, within the specified parameters. Both series are manufactured by Stackpole Electronics Inc and share identical electrical characteristics (resistance, tolerance, temperature coefficient, operating range) and mechanical form factor (axial, 2 terminations). Series designation reflects product line organization only.

Q: Does the smaller physical dimension of CFM14JT300R affect compatibility?

A: No. The CFM14JT300R maintains the same axial package type and 2-termination configuration. The reduced physical dimension (0.067" Dia x 0.130" L vs. 0.091" Dia x 0.236" L) is compatible with standard through-hole PCB layouts and does not affect electrical performance or thermal characteristics.

Q: Are all three parts ROHS3 compliant?

A: Yes. CF14JA300R, CFM12JT300R, and CFM14JT300R are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.