RC1/4682KB Equivalent & Substitute Parts

Part Overview

The RC1/4682KB is a 6.8 kOhms ±10% 0.25W 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 2-terminal axial package configuration. The product is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing circuit applications and maintenance requirements.

Substiute Parts

RC1/4682KB

Kamaya Inc.In Stock: 1089RC1/4682KB Datasheet

Current PartRFQ

QWCC268

NTE Electronics, IncIn Stock: 1161QWCC268 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC1/4682KB is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Resistance value: 6.8 kOhms (exact match required)
• Power rating: 0.25W minimum (equal or greater acceptable)
• Tolerance: ±10% or tighter (substitute tolerance of ±5% is acceptable)
• Composition: Carbon composition (maintains electrical characteristics)

Mechanical Compatibility Requirements:

• Package type: Axial configuration (required for through-hole PCB mounting)
• Number of terminations: 2-terminal (required for circuit connectivity)
• Physical dimensions: Compatible with existing PCB hole spacing and component layout

Environmental Compatibility Requirements:

• Operating temperature range: Substitute must support minimum -55°C to 125°C (extended range acceptable)

The QWCC268 manufactured by NTE Electronics, Inc. meets all substitution criteria through identical resistance value, equal power rating, tighter tolerance specification, compatible axial package configuration, and extended operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

The QWCC268 is a direct functional equivalent for the obsolete RC1/4682KB based on the following engineering criteria:

Electrical Equivalence: The QWCC268 provides identical resistance value and power rating. The tighter tolerance specification (±5% versus ±10%) represents an improvement in precision without introducing incompatibility. Both components utilize carbon composition construction, ensuring equivalent electrical behavior in circuit applications.

Mechanical Compatibility: Both components feature identical axial package configuration with 2-terminal terminations. Physical dimensions are within compatible tolerances for standard through-hole PCB mounting. The QWCC268 dimensions (0.090" Dia x 0.250" L) are marginally smaller than the original part, ensuring fit within existing component footprints.

Environmental Performance: The QWCC268 operating temperature range (-55°C to 150°C) exceeds the original specification (-55°C to 125°C), providing enhanced thermal performance for extended operating conditions.

Compliance and Availability: The QWCC268 is classified as active product status with ROHS3 compliance certification, ensuring long-term availability and adherence to current regulatory standards. The original RC1/4682KB obsolete status necessitates transition to this equivalent alternative.

Frequently Asked Questions (FAQ)

Q: Can the QWCC268 be used as a direct replacement for the RC1/4682KB in existing circuits?

A: Yes. The QWCC268 meets all electrical and mechanical substitution criteria. Identical resistance value, power rating, and package configuration ensure direct compatibility. The tighter tolerance and extended temperature range represent performance improvements.

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

A: Tolerance specifies the allowable deviation from the nominal resistance value. The RC1/4682KB allows deviation from 6.12 kOhms to 7.48 kOhms. The QWCC268 restricts deviation to 6.46 kOhms to 7.14 kOhms. The tighter tolerance of the substitute provides greater precision without affecting circuit compatibility.

Q: Are the physical dimensions of the QWCC268 compatible with the original PCB layout?

A: Yes. The QWCC268 dimensions (0.090" Dia x 0.250" L) are slightly smaller than the RC1/4682KB (0.094" Dia x 0.248" L). This dimensional compatibility ensures proper fit within existing through-hole PCB mounting positions without modification.

Q: What is the difference between carbon composition resistors and other resistor types?

A: Carbon composition resistors are constructed from a mixture of carbon particles and a binding material. Both the RC1/4682KB and QWCC268 utilize this construction type, ensuring equivalent electrical characteristics and circuit behavior.

Q: Does the extended operating temperature range of the QWCC268 affect circuit performance?

A: The extended range (-55°C to 150°C versus -55°C to 125°C) does not negatively affect performance. This specification indicates the component maintains rated electrical characteristics across a broader temperature envelope, providing enhanced reliability in temperature-variable environments.

Q: What is the significance of ROHS3 compliance on the QWCC268?

A: ROHS3 compliance indicates the component meets current regulatory restrictions on hazardous substances. This certification ensures the substitute part adheres to modern environmental and safety standards applicable to electronic components.

Q: Can the QWCC268 be used in applications requiring the original ±10% tolerance specification?

A: Yes. The QWCC268 ±5% tolerance is tighter than the ±10% requirement, meaning it satisfies any circuit design that specifies ±10% tolerance or looser. Tighter tolerance represents an improvement in precision.