CFS1/4CT52R682J Equivalent & Substitute Parts

Part Overview

The CFS1/4CT52R682J is a 6.8 kOhms ±5% 0.25W (1/4W) through-hole resistor with axial carbon film composition manufactured by KOA Speer Electronics, Inc. This component is classified as Active product status and is ROHS3 compliant. Substitute parts are identified when original stock becomes unavailable, when procurement lead times exceed project requirements, or when alternative suppliers offer equivalent electrical and mechanical specifications within the defined parameter tolerances.

Key Parameters

Parameter	Value	Criticality for Substitution
Resistance Value	6.8 kOhms	Critical - Must Match Exactly
Tolerance	±5%	Critical - Must Match Exactly
Power Rating	0.25W (1/4W)	Critical - Must Match or Exceed
Composition	Carbon Film	Critical - Determines Performance Characteristics
Package Type	Axial	Critical - Determines PCB Compatibility
Operating Temperature Range	-55°C ~ 155°C	Critical - Application Dependent
RoHS Status	ROHS3 Compliant	Critical - Regulatory Requirement
Number of Terminations	2	Critical - Electrical Connection Points

Substitute Part Grouping Explanation

Substitute parts for the CFS1/4CT52R682J are identified based on strict electrical and mechanical parameter equivalence. The following parameters determine substitution eligibility:

Electrical Parameters (Must Match):

Resistance value: 6.8 kOhms
Tolerance: ±5%
Power rating: 0.25W (1/4W) minimum
Composition: Carbon Film
Operating temperature range: -55°C ~ 155°C minimum

Mechanical Parameters (Must Match):

Package type: Axial
Number of terminations: 2
Through-hole configuration

Compliance Parameters (Must Match):

RoHS3 compliance status
REACH unaffected status

The CFR-25JB-52-6K8 manufactured by YAGEO meets all critical electrical and mechanical requirements for direct substitution. Physical dimensions differ between the main part and substitute; however, both maintain axial through-hole configuration compatible with standard PCB layouts designed for 1/4W axial resistors.

Parameter Comparison

Parameter	CFS1/4CT52R682J (KOA Speer)	CFR-25JB-52-6K8 (YAGEO)	Match Status
Resistance Value	6.8 kOhms	6.8 kOhms	Equivalent
Tolerance	±5%	±5%	Equivalent
Power Rating	0.25W (1/4W)	0.25W (1/4W)	Equivalent
Composition	Carbon Film	Carbon Film	Equivalent
Operating Temperature Range	-55°C ~ 155°C	-55°C ~ 155°C	Equivalent
Temperature Coefficient	-450/+350 ppm/°C	-500/+350 ppm/°C	Within Tolerance
Package Type	Axial	Axial	Equivalent
Number of Terminations	2	2	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
REACH Status	REACH Unaffected	REACH Unaffected	Equivalent
Size / Dimension	0.067" Dia x 0.126" L (1.70mm x 3.20mm)	0.094" Dia x 0.248" L (2.40mm x 6.30mm)	Different - Larger Substitute
Packaging Format	Cut Tape (CT)	Bulk	Different - Packaging Only

Engineering Selection Recommendations

The CFR-25JB-52-6K8 (YAGEO) is an equivalent substitute for the CFS1/4CT52R682J (KOA Speer Electronics) based on matching electrical specifications, mechanical compatibility, and regulatory compliance status.

Selection Criteria:

Electrical Equivalence: Both parts deliver identical resistance value (6.8 kOhms), tolerance (±5%), and power rating (0.25W). Temperature coefficient variation (-450/+350 ppm/°C versus -500/+350 ppm/°C) remains within acceptable engineering tolerances for carbon film resistor applications.
Mechanical Compatibility: Both components feature axial through-hole configuration with two terminations, enabling direct PCB layout compatibility. Physical dimension differences do not affect electrical performance or standard PCB hole spacing for 1/4W axial resistors.
Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements.
Product Status: Both components are classified as Active, ensuring continued availability and manufacturing support.
Packaging Consideration: The substitute part is supplied in bulk packaging rather than cut tape. Procurement and assembly processes must accommodate this packaging format difference.

Frequently Asked Questions (FAQ)

Q: Can CFR-25JB-52-6K8 be used as a direct replacement for CFS1/4CT52R682J in existing PCB designs?

A: Yes. Both components are axial through-hole resistors with identical electrical specifications (6.8 kOhms ±5%, 0.25W) and two terminations. Standard PCB hole spacing accommodates both parts. Physical dimension differences do not affect electrical performance or mechanical fit in typical through-hole applications.

Q: What is the difference in physical size between these two parts?

A: The CFS1/4CT52R682J measures 0.067" diameter × 0.126" length (1.70mm × 3.20mm). The CFR-25JB-52-6K8 measures 0.094" diameter × 0.248" length (2.40mm × 6.30mm). The substitute is larger in both dimensions but remains compatible with standard 1/4W axial resistor PCB layouts.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts are ROHS3 compliant and REACH unaffected. They meet identical environmental and regulatory requirements.

Q: What is the temperature coefficient difference, and does it affect substitution?

A: The CFS1/4CT52R682J has a temperature coefficient of -450/+350 ppm/°C, while the CFR-25JB-52-6K8 has -500/+350 ppm/°C. This variation remains within acceptable tolerances for carbon film resistor applications and does not prevent substitution.

Q: Does packaging format affect substitution eligibility?

A: Packaging format (cut tape versus bulk) affects procurement and assembly processes but does not affect electrical or mechanical substitution eligibility. Component specifications remain identical regardless of packaging format.

Q: Are both parts currently in active production?

A: Yes. Both the CFS1/4CT52R682J and CFR-25JB-52-6K8 are classified as Active product status, ensuring continued manufacturing availability and supply chain support.

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