RC1/2683KB Equivalent & Substitute Parts

Part Overview

The RC1/2683KB is a 68 kOhms ±10% 0.5W through-hole resistor with axial leads manufactured by Kamaya Inc. This carbon composition resistor operates across a temperature range of -55°C to 125°C and features a two-termination axial package design. The part is classified as obsolete, necessitating identification of equivalent substitute components for ongoing circuit maintenance and new design implementations. Substitute parts must maintain the same resistance value, power rating, and package configuration while meeting or exceeding the original specifications.

Substiute Parts

RC1/2683KB

Kamaya Inc.In Stock: 821RC1/2683KB Datasheet

Current PartRFQ

HWCC368

NTE Electronics, IncIn Stock: 2363HWCC368 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC1/2683KB is based on the following critical parameters that must remain constant or improve:

Mandatory Matching Parameters:

• Resistance value: 68 kOhms
• Power rating: 0.5W (1/2W) minimum
• Package configuration: Axial through-hole
• Composition: Carbon composition
• Number of terminations: 2

Allowable Improvements:

• Tolerance may be tighter (lower percentage) than ±10%
• Operating temperature range may be extended beyond -55°C ~ 125°C
• Physical dimensions may vary within standard axial package tolerances
• Product status may transition from obsolete to active

The HWCC368 manufactured by NTE Electronics, Inc. qualifies as a direct substitute based on these criteria.

Parameter Comparison

Engineering Selection Recommendations

The HWCC368 is a qualified substitute for the RC1/2683KB based on the following factors:

Electrical Equivalence: Both components provide identical 68 kOhms resistance at 0.5W power dissipation. The HWCC368 offers improved tolerance specification (±5% versus ±10%), which provides tighter resistance accuracy in circuit applications.

Thermal Performance: The HWCC368 extends the maximum operating temperature to 150°C compared to the original 125°C specification, providing enhanced thermal margin for applications operating at elevated ambient conditions.

Physical Compatibility: Axial package dimensions are within standard manufacturing tolerances, ensuring mechanical fit in existing PCB layouts and through-hole mounting positions designed for the RC1/2683KB.

Product Availability: The HWCC368 maintains active product status with 2333 units in stock, whereas the RC1/2683KB is obsolete. This availability ensures reliable procurement for both replacement and new production requirements.

Regulatory Compliance: Both components share identical ECCN (EAR99) and HTSUS (8533.10.0060) classifications. The HWCC368 is ROHS3 compliant, meeting current environmental and regulatory standards.

Frequently Asked Questions (FAQ)

Q: Can the HWCC368 be used as a direct replacement for the RC1/2683KB in existing circuits?

A: Yes. The HWCC368 is electrically and mechanically compatible. Both components provide 68 kOhms resistance at 0.5W power rating in identical axial package configurations. The substitute's tighter tolerance and extended temperature range represent improvements over the original specification.

Q: What is the significance of the tolerance difference between ±10% and ±5%?

A: Tolerance defines the acceptable resistance variation from the nominal 68 kOhm value. The RC1/2683KB allows variation between 61.2 kOhms and 74.8 kOhms. The HWCC368 restricts variation to 64.6 kOhms and 71.4 kOhms. Applications requiring tighter resistance accuracy benefit from the HWCC368's improved tolerance specification.

Q: Are the physical dimensions of the HWCC368 compatible with PCB layouts designed for the RC1/2683KB?

A: Yes. The HWCC368 dimensions (0.140" Dia x 0.375" L) are within standard axial resistor package tolerances relative to the RC1/2683KB (0.142" Dia x 0.374" L). Both components mount identically in through-hole positions.

Q: What is the operating temperature difference between these components?

A: The RC1/2683KB operates from -55°C to 125°C. The HWCC368 extends the upper limit to 150°C. For applications operating within the original -55°C to 125°C range, both components perform identically. Applications requiring operation above 125°C require the HWCC368.

Q: Why is the RC1/2683KB classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The HWCC368 provides equivalent functionality with active production status, ensuring long-term availability for procurement and supply chain continuity.

Q: Are there any compliance or certification differences between the two components?

A: Both components share identical ECCN and HTSUS classifications. The HWCC368 is ROHS3 compliant, meeting current environmental regulations. The RC1/2683KB compliance status is not specified in available documentation.