RC1/2105KB Equivalent & Substitute Parts

Part Overview

The RC1/2105KB is a 1 MOhm ±10% 0.5W axial carbon composition through-hole resistor manufactured by Kamaya Inc. This component is classified as obsolete product status. Due to its obsolete designation, locating original stock from the original manufacturer may present supply chain challenges. Equivalent substitute parts with identical electrical and mechanical specifications are available from alternative manufacturers to ensure design continuity and procurement flexibility.

Substiute Parts

RC1/2105KB

Kamaya Inc.In Stock: 967RC1/2105KB Datasheet

Current PartRFQ

RC12KB1M00

Stackpole Electronics IncIn Stock: 752RC12KB1M00 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC1/2105KB is determined by strict equivalence across the following parameters:

• Resistance Value: 1 MOhms (exact match required)
• Tolerance: ±10% (exact match required)
• Power Rating: 0.5W / 1/2W (exact match required)
• Composition: Carbon Composition (exact match required)
• Package Configuration: Axial through-hole (exact match required)
• Operating Temperature Range: -55°C ~ 125°C (exact match required)
• Physical Dimensions: 0.142" Dia x 0.374" L / 3.60mm x 9.50mm (exact match required)

Substitute parts must satisfy all parameters listed above without deviation. Additional features such as non-inductive or pulse withstanding characteristics do not disqualify a part from substitution, as these represent enhanced capabilities within the same functional category.

Parameter Comparison

Engineering Selection Recommendations

The RC12KB1M00 manufactured by Stackpole Electronics Inc. is a direct parametric equivalent to the RC1/2105KB. Both components share identical electrical specifications (1 MOhm resistance, ±10% tolerance, 0.5W power rating) and mechanical characteristics (axial package, 3.60mm x 9.50mm dimensions).

The RC12KB1M00 carries RoHS3 compliance and REACH unaffected status, providing regulatory alignment for applications subject to environmental standards. Both parts are classified as obsolete, reflecting the discontinuation of carbon composition resistor technology in favor of modern thin-film and metal-film alternatives.

Selection between these equivalent parts should be based on procurement availability, as both satisfy identical functional and mechanical requirements for direct substitution in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the RC12KB1M00 be used as a direct replacement for the RC1/2105KB?

A: Yes. The RC12KB1M00 is a parametric equivalent with identical resistance (1 MOhm), tolerance (±10%), power rating (0.5W), composition (carbon composition), package type (axial), operating temperature range (-55°C ~ 125°C), and physical dimensions (0.142" Dia x 0.374" L). Direct substitution is supported without circuit modification.

Q: Are there physical compatibility concerns when substituting these parts?

A: No. Both components share identical axial package dimensions of 0.142" diameter by 0.374" length (3.60mm x 9.50mm). PCB footprints and through-hole spacing are compatible without modification.

Q: What is the significance of the "non-inductive" and "pulse withstanding" features listed for the RC12KB1M00?

A: These features represent enhanced performance characteristics of the Stackpole Electronics part. They do not affect basic substitution compatibility, as the core electrical parameters (resistance, tolerance, power rating) remain identical to the original RC1/2105KB specification.

Q: Why are both parts classified as obsolete?

A: Carbon composition resistors have been largely superseded by thin-film and metal-film resistor technologies in modern electronics manufacturing. Both the Kamaya Inc. RC1/2105KB and Stackpole Electronics RC12KB1M00 reflect this industry transition toward discontinued product lines.

Q: Are there regulatory compliance differences between these parts?

A: The RC12KB1M00 carries explicit RoHS3 compliance and REACH unaffected certifications. The RC1/2105KB does not list these certifications in the provided specifications. For applications requiring regulatory compliance documentation, the RC12KB1M00 provides verified compliance status.