RC12JB5M10 Equivalent & Substitute Parts

Part Overview

The RC12JB5M10 is a 5.1 MOhm ±5% 0.5W axial carbon composition resistor manufactured by Stackpole Electronics Inc. This component is classified as obsolete, making substitute parts necessary for ongoing production and maintenance applications. The part features non-inductive construction with pulse withstanding capability, suitable for through-hole assembly in axial configuration.

Substiute Parts

RC12JB5M10

Stackpole Electronics IncIn Stock: 1108RC12JB5M10 Datasheet

Current PartRFQ

RC12KB5M10

Stackpole Electronics IncIn Stock: 691RC12KB5M10 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the RC12JB5M10 is determined by the following critical parameters:

• Resistance Value: Must be 5.1 MOhms
• Power Rating: Must be 0.5W (1/2W)
• Package Type: Must be Axial
• Composition: Must be Carbon Composition
• Operating Temperature Range: Must support -55°C to 125°C
• Physical Dimensions: Must match 0.142" Dia x 0.374" L (3.60mm x 9.50mm)

The RC12KB5M10 qualifies as a substitute despite a tolerance difference (±10% versus ±5%) because tolerance is a secondary parameter that does not affect mechanical fit, thermal performance, or fundamental electrical operation within the specified operating range.

Parameter Comparison

Engineering Selection Recommendations

The RC12KB5M10 is the qualified substitute for the obsolete RC12JB5M10. Both parts maintain identical resistance values, power ratings, physical dimensions, and operating temperature ranges. The RC12KB5M10 is currently in active production status with confirmed inventory availability (628 pcs), whereas the RC12JB5M10 is obsolete. Both parts carry ROHS3 compliance and identical regulatory classifications (EAR99, HTSUS 8533.10.0060).

Selection of the RC12KB5M10 is appropriate for applications where the ±10% tolerance specification is acceptable within circuit design margins. Both parts are manufactured by the same supplier using identical carbon composition construction and axial packaging.

Frequently Asked Questions (FAQ)

Q: Can RC12KB5M10 be used in place of RC12JB5M10? A: Yes. The RC12KB5M10 is a direct substitute. Both parts share identical resistance values, power ratings, physical dimensions, operating temperature ranges, and composition. The tolerance difference (±10% versus ±5%) does not affect mechanical compatibility or thermal performance.

Q: What is the primary difference between these parts? A: The RC12KB5M10 has a ±10% tolerance specification compared to the ±5% tolerance of the RC12JB5M10. The RC12KB5M10 is also in active production, whereas the RC12JB5M10 is obsolete.

Q: Are the physical dimensions identical? A: Yes. Both parts measure 0.142" Dia x 0.374" L (3.60mm x 9.50mm) and use axial packaging, ensuring identical PCB footprint and assembly compatibility.

Q: Do both parts meet the same regulatory requirements? A: Yes. Both RC12JB5M10 and RC12KB5M10 are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes.

Q: What is the operating temperature range for both parts? A: Both parts operate across -55°C to 125°C, providing identical thermal performance specifications.