CF1/4CT52R205J Equivalent & Substitute Parts

Part Overview

The CF1/4CT52R205J is a 2 MOhms ±5% 0.25W through-hole axial resistor manufactured by KOA Speer Electronics, Inc. This carbon film resistor features flame-proof and safety characteristics, designed for applications requiring reliable fixed resistance in the megohm range. The part is currently in active production status with 5821 units available in cut tape packaging. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit designs.

Substiute Parts

CF1/4CT52R205J

KOA Speer Electronics, Inc.In Stock: 5869CF1/4CT52R205J Datasheet

Current PartRFQ

CF1/4C205J

KOA Speer Electronics, Inc.In Stock: 2030CF1/4C205J Datasheet

Parametric EquivalentRFQ

CFR-25JB-52-2M

YAGEOIn Stock: 31614CFR-25JB-52-2M Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CF1/4CT52R205J are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Resistance value: 2 MOhms
• Tolerance: ±5%
• Power rating: 0.25W (1/4W)
• Composition: Carbon Film
• Package: Axial through-hole
• Operating temperature range: -55°C to 155°C minimum
• RoHS3 compliance

Packaging Variation: The CF1/4C205J differs only in packaging format (bulk versus cut tape), maintaining identical electrical specifications and physical dimensions.

Dimensional Tolerance: The CFR-25JB-52-2M exhibits minor dimensional variation (0.094" Dia x 0.248" L versus 0.091" Dia x 0.240" L) within acceptable mechanical tolerances for axial through-hole mounting, with equivalent electrical performance.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active production status and ROHS3 compliance, qualifying them for equivalent circuit applications. Selection between CF1/4CT52R205J and CF1/4C205J depends on procurement packaging requirements, with both parts sharing identical electrical and mechanical specifications. The CFR-25JB-52-2M from YAGEO provides functional equivalence with slightly higher temperature coefficient (-1500ppm/°C versus -1300ppm/°C) and minor dimensional variation. All parts satisfy the specified operating temperature range of -55°C to 155°C and maintain ±5% tolerance across the 2 MOhms resistance value.

Frequently Asked Questions (FAQ)

Q: Can CF1/4C205J replace CF1/4CT52R205J directly? A: Yes. Both parts are electrically and mechanically identical, differing only in packaging format (bulk versus cut tape). Selection depends on assembly process requirements and procurement volume.

Q: What is the significance of the temperature coefficient difference between KOA and YAGEO parts? A: The CFR-25JB-52-2M exhibits a temperature coefficient of -1500ppm/°C compared to -1300ppm/°C for KOA parts. This represents a 200ppm/°C difference, resulting in approximately 0.02% additional resistance change per degree Celsius. Applications with strict temperature stability requirements should account for this variance.

Q: Are dimensional differences between CF1/4CT52R205J and CFR-25JB-52-2M significant? A: Dimensional variations (0.091" to 0.094" diameter and 0.240" to 0.248" length) fall within standard mechanical tolerances for axial through-hole components. Both parts mount identically on standard PCB layouts with 0.1" pitch spacing.

Q: Do all substitute parts maintain RoHS3 compliance? A: Yes. CF1/4C205J, CF1/4CT52R205J, and CFR-25JB-52-2M are all ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: Which part should be selected for high-volume production? A: CFR-25JB-52-2M offers the highest inventory availability (31505 units) compared to CF1/4CT52R205J (5821 units) and CF1/4C205J (1996 units), making it suitable for large-scale manufacturing runs.