RC14JB300K Equivalent & Substitute Parts

Part Overview

The RC14JB300K is a 300 kOhms ±5% 0.25W through-hole axial resistor manufactured by Stackpole Electronics Inc. This carbon composition resistor features non-inductive and pulse-withstanding characteristics, designed for applications requiring precision resistance values in compact axial packages. The part is currently listed as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications.

Substiute Parts

RC14JB300K

Stackpole Electronics IncIn Stock: 1084RC14JB300K Datasheet

Current PartRFQ

RC14KB300K

Stackpole Electronics IncIn Stock: 1119RC14KB300K Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the RC14JB300K is determined by the following critical parameters:

• Resistance Value: Must be 300 kOhms
• Power Rating: Must be 0.25W (1/4W)
• Package Style: Must be Axial
• Physical Dimensions: Must match 0.094" Dia x 0.248" L (2.40mm x 6.30mm)
• Composition: Carbon Composition
• Operating Temperature Range: -55°C ~ 125°C
• Features: Non-Inductive, Pulse Withstanding

The RC14KB300K qualifies as a substitute based on matching all critical parameters. The tolerance difference (±10% versus ±5%) represents a relaxation of the tolerance specification, which is acceptable in applications where the tighter tolerance of the original part is not required.

Parameter Comparison

Engineering Selection Recommendations

The RC14KB300K is the manufacturer-recommended substitute for the obsolete RC14JB300K. Both parts are manufactured by Stackpole Electronics Inc and maintain identical physical dimensions, power ratings, and operating temperature specifications. The RC14KB300K is currently in active production status, ensuring availability for new designs and replacement applications.

The tolerance specification difference (±10% versus ±5%) should be evaluated against circuit requirements. Applications requiring the tighter ±5% tolerance of the original part must source remaining inventory of the RC14JB300K or identify alternative resistor technologies that meet the precision requirement.

Both parts maintain full ROHS3 compliance and REACH unaffected status, supporting regulatory requirements for modern electronics manufacturing.

Frequently Asked Questions (FAQ)

Q: Can RC14KB300K be used as a direct replacement for RC14JB300K?

A: Yes, the RC14KB300K is the manufacturer-recommended substitute. Both parts share identical resistance values, power ratings, physical dimensions, and operating temperature ranges. The primary difference is tolerance specification (±10% versus ±5%).

Q: What is the impact of the tolerance difference between these parts?

A: The RC14KB300K has a wider tolerance band (±10%) compared to the RC14JB300K (±5%). This means the actual resistance value may deviate further from the nominal 300 kOhms specification. Applications requiring precision resistance values should evaluate whether the wider tolerance is acceptable for circuit performance.

Q: Are both parts physically interchangeable?

A: Yes. Both parts are axial package resistors with identical dimensions (0.094" Dia x 0.248" L / 2.40mm x 6.30mm), allowing direct board-level substitution without layout modifications.

Q: What is the product status difference between these parts?

A: The RC14JB300K is obsolete, meaning it is no longer manufactured and available inventory is limited. The RC14KB300K is active production, ensuring reliable long-term availability for new designs and ongoing production requirements.

Q: Do both parts meet current regulatory requirements?

A: Yes. Both the RC14JB300K and RC14KB300K are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronics manufacturing.