CF1/4C392J Equivalent & Substitute Parts

Part Overview

The CF1/4C392J is a 3.9 kOhms ±5% 0.25W through-hole resistor manufactured by KOA Speer Electronics, Inc. in the CF series. This axial carbon film resistor is designed for general-purpose applications requiring stable resistance values across a wide operating temperature range of -55°C to 155°C. The part maintains Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, supply chain considerations, or packaging format preferences.

Substiute Parts

CF1/4C392J

KOA Speer Electronics, Inc.In Stock: 2091CF1/4C392J Datasheet

Current PartRFQ

CF14JT3K90

Stackpole Electronics IncIn Stock: 23534CF14JT3K90 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CF1/4C392J is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Resistance value: 3.9 kOhms
• Tolerance: ±5%
• Power rating: 0.25W (1/4W)
• Composition: Carbon Film

Mechanical Compatibility Requirements:

• Package type: Axial through-hole
• Number of terminations: 2
• Physical dimensions: Compatible with 0.091" diameter axial form factor

Regulatory & Compliance Requirements:

• RoHS3 compliance
• REACH unaffected status
• ECCN classification: EAR99

The CF14JT3K90 manufactured by Stackpole Electronics Inc. meets all electrical and mechanical equivalence criteria. Both parts operate across the identical temperature range (-55°C to 155°C) and share the same resistance, tolerance, power rating, and axial package configuration. Dimensional variance (0.240" vs. 0.236" length) remains within acceptable tolerance for standard through-hole PCB applications.

Parameter Comparison

Engineering Selection Recommendations

Both the CF1/4C392J and CF14JT3K90 are Active product status components with full RoHS3 compliance and REACH unaffected designation. Selection between these parts is based on availability and packaging format requirements rather than electrical or mechanical performance differences.

The CF1/4C392J is supplied in Bulk packaging format with 2039 pieces in stock inventory. The CF14JT3K90 is supplied in Cut Tape (CT) packaging format with 23450 pieces in stock inventory. Both parts satisfy identical electrical specifications and operate within the same temperature parameters. The CF14JT3K90 includes flame retardant coating and safety features in its carbon film composition, providing additional material property benefits without altering electrical performance.

For applications requiring bulk component quantities or specific packaging preferences, either part provides equivalent functional performance in 3.9 kOhms ±5% 0.25W axial resistor applications.

Frequently Asked Questions (FAQ)

Q: Can CF14JT3K90 be used as a direct replacement for CF1/4C392J?

A: Yes. Both parts share identical electrical specifications (3.9 kOhms ±5% at 0.25W), operate across the same temperature range (-55°C to 155°C), and use axial through-hole packaging. The 0.004" length difference (0.240" vs. 0.236") is within standard PCB hole spacing tolerances for axial components.

Q: What is the difference between Bulk and Cut Tape packaging?

A: Bulk packaging supplies loose components in quantity, suitable for high-volume assembly operations. Cut Tape (CT) packaging supplies components on continuous tape that is cut to specified lengths, optimized for automated pick-and-place equipment. Both formats contain identical components; packaging selection depends on assembly process requirements.

Q: Are the temperature coefficients identical between these parts?

A: The temperature coefficients differ slightly. The CF1/4C392J specifies -450/+350 ppm/°C, while the CF14JT3K90 specifies 0/-400 ppm/°C. Both coefficients remain within acceptable ranges for general-purpose carbon film resistor applications and do not affect substitution eligibility for standard circuit designs.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both CF1/4C392J and CF14JT3K90 are RoHS3 compliant and REACH unaffected, meeting current electronic component regulatory standards for commercial and industrial applications.

Q: What does the flame retardant coating on the CF14JT3K90 provide?

A: The flame retardant coating and safety features on the CF14JT3K90 enhance material properties under thermal stress conditions. This does not alter electrical performance but provides additional safety margin in applications subject to elevated thermal exposure.