RC14KB390R Equivalent & Substitute Parts

Part Overview

The RC14KB390R is a 390 Ohms ±10% 0.25W (1/4W) through-hole resistor manufactured by Stackpole Electronics Inc. This axial carbon composition resistor features non-inductive and pulse withstanding characteristics, with an operating temperature range of -55°C to 125°C. The part is currently obsolete, making equivalent substitutes necessary for ongoing applications and new designs requiring this resistance value and power rating.

Substiute Parts

RC14KB390R

Stackpole Electronics IncIn Stock: 903RC14KB390R Datasheet

Current PartRFQ

ASR14JA390R

Stackpole Electronics IncIn Stock: 1171ASR14JA390R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ASR14JA390R qualifies as a direct substitute for the RC14KB390R based on the following critical parameters:

• Resistance Value: Both parts are 390 Ohms
• Power Rating: Both are rated at 0.25W (1/4W)
• Package Type: Both use axial through-hole configuration
• Operating Temperature Range: ASR14JA390R (-55°C ~ 155°C) encompasses the RC14KB390R range (-55°C ~ 125°C)
• Compliance: Both are ROHS3 compliant and EAR99 classified

The ASR14JA390R represents an upgrade path, offering improved tolerance (±5% versus ±10%) and metal film construction with flame retardant coating, while maintaining electrical compatibility with the original specification.

Parameter Comparison

Engineering Selection Recommendations

The ASR14JA390R is the recommended substitute for the obsolete RC14KB390R. Both parts maintain identical resistance values and power ratings with axial through-hole packaging, ensuring direct functional compatibility. The ASR14JA390R offers superior tolerance specifications (±5% versus ±10%) and extended operating temperature capability (-55°C to 155°C versus -55°C to 125°C). Both parts maintain ROHS3 compliance and are classified as EAR99 for export purposes. The ASR14JA390R is currently in active production with confirmed inventory availability, eliminating supply chain constraints associated with the obsolete RC14KB390R.

Frequently Asked Questions (FAQ)

Q: Can the ASR14JA390R be used as a direct replacement for the RC14KB390R in existing designs?

A: Yes. Both parts share identical resistance values (390 Ohms), power ratings (0.25W), and axial package configurations. The ASR14JA390R operates within the temperature range of the original part and maintains equivalent electrical performance.

Q: What are the differences between carbon composition and metal film resistors?

A: The RC14KB390R uses carbon composition construction, while the ASR14JA390R uses metal film construction. The ASR14JA390R provides tighter tolerance (±5% versus ±10%), improved stability, and flame retardant coating. Both compositions are suitable for general-purpose applications.

Q: Are there any physical compatibility concerns with the ASR14JA390R?

A: The ASR14JA390R has slightly smaller dimensions (0.091" Dia x 0.236" L) compared to the RC14KB390R (0.094" Dia x 0.248" L). Both use standard axial through-hole leads and will fit standard 0.1" pitch PCB layouts without modification.

Q: Why is the RC14KB390R listed as obsolete?

A: The RC14KB390R has been discontinued by the manufacturer. The ASR14JA390R represents the current active equivalent from Stackpole Electronics Inc, offering improved specifications and ongoing production support.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the RC14KB390R and ASR14JA390R are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes.