CFS1/4CT52R183J Equivalent & Substitute Parts

Part Overview

The CFS1/4CT52R183J is an 18 kOhms ±5% 0.25W through-hole resistor manufactured by KOA Speer Electronics, Inc. This carbon film axial resistor features flame-proof and safety characteristics, designed for applications requiring reliable fixed resistance in the 18 kOhm range. The part maintains Active product status with full ROHS3 compliance and is suitable for general-purpose electronic circuit applications across industrial and commercial temperature ranges.

Substitute parts become necessary when the primary manufacturer part is unavailable, when supply chain optimization is required, or when design flexibility permits equivalent component selection without compromising circuit performance.

Substiute Parts

CFS1/4CT52R183J

KOA Speer Electronics, Inc.In Stock: 5946CFS1/4CT52R183J Datasheet

Current PartRFQ

CFR-25JB-52-18K

YAGEOIn Stock: 6835CFR-25JB-52-18K Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CFS1/4CT52R183J is determined by strict equivalence across the following critical parameters:

• Resistance value: 18 kOhms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 0.25W / 1/4W (exact match required)
• Composition: Carbon Film (exact match required)
• Package: Axial through-hole (exact match required)
• Operating temperature range: -55°C ~ 155°C (minimum requirement)
• Regulatory compliance: ROHS3 Compliant (minimum requirement)

The CFR-25JB-52-18K manufactured by YAGEO meets all substitution criteria. Both parts share identical electrical specifications, composition, and compliance certifications. Physical dimensions vary within acceptable tolerances for axial through-hole components, and both maintain the same two-termination configuration suitable for standard PCB mounting.

Parameter Comparison

Engineering Selection Recommendations

Both the CFS1/4CT52R183J and CFR-25JB-52-18K are Active product status components with full ROHS3 compliance and REACH unaffected status. Selection between these parts is based on availability, supply chain considerations, and packaging requirements rather than electrical performance differences.

The CFS1/4CT52R183J features flame-proof and safety characteristics as specified by the manufacturer. The CFR-25JB-52-18K does not list these specific features in the provided data. For applications where flame-proof or safety certifications are contractually or functionally required, the KOA Speer part remains the primary choice.

Physical dimensions differ between the two parts. The CFS1/4CT52R183J measures 0.067" diameter × 0.126" length, while the CFR-25JB-52-18K measures 0.094" diameter × 0.248" length. PCB layout and component spacing constraints must be evaluated before substitution.

Frequently Asked Questions (FAQ)

Q: Can CFR-25JB-52-18K replace CFS1/4CT52R183J in all applications?

A: Electrical substitution is valid for circuits requiring 18 kOhms ±5% at 0.25W across the -55°C to 155°C temperature range. Physical dimensions differ, requiring verification of PCB layout compatibility. Applications specifically requiring flame-proof or safety certifications must retain the original KOA Speer part.

Q: What is the significance of the temperature coefficient difference?

A: The CFS1/4CT52R183J has a temperature coefficient of -450/+350 ppm/°C, while the CFR-25JB-52-18K is -500/+350 ppm/°C. Both values fall within acceptable ranges for general-purpose carbon film resistors. The difference is negligible for most circuit applications but should be evaluated for precision analog circuits operating across the full temperature range.

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

A: Both parts maintain Active product status and ROHS3 compliance. Failure rate data is not provided for either component. High-reliability applications should consult manufacturer datasheets and qualification requirements specific to the end-use environment.

Q: What packaging differences exist between these parts?

A: The CFS1/4CT52R183J is supplied in Cut Tape (CT) packaging, while the CFR-25JB-52-18K is supplied in Bulk packaging. This affects handling, storage, and automated assembly processes but does not impact electrical performance.

Q: Can these parts be used interchangeably on existing PCBs?

A: Physical dimensions must be verified against PCB layout. The CFR-25JB-52-18K is larger (0.094" × 0.248" vs. 0.067" × 0.126"), which may create clearance issues in space-constrained designs. Component lead spacing and hole positioning should be confirmed before substitution.