RC14KB220R Equivalent & Substitute Parts

Part Overview

The RC14KB220R is a 220 Ohms ±10% 0.25W (1/4W) through-hole resistor manufactured by Stackpole Electronics Inc. This carbon composition axial 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 similar electrical performance.

Substiute Parts

RC14KB220R

Stackpole Electronics IncIn Stock: 991RC14KB220R Datasheet

Current PartRFQ

ASRM12JB220R

Stackpole Electronics IncIn Stock: 1034ASRM12JB220R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ASRM12JB220R qualifies as a functional substitute for the RC14KB220R based on the following substitution criteria:

Matching Parameters:

• Identical resistance value: 220 Ohms
• Same axial package configuration
• Equivalent operating temperature range (-55°C ~ 155°C exceeds original specification)
• Pulse withstanding capability maintained
• RoHS3 compliance maintained

Allowable Variations:

• Tolerance upgraded from ±10% to ±5% (tighter tolerance is acceptable)
• Power rating increased from 0.25W to 0.5W (higher rating provides design margin)
• Composition changed from carbon composition to metal film (different technology, same functional class)
• Active product status (versus obsolete original)

Parameter Comparison

Engineering Selection Recommendations

The ASRM12JB220R is the manufacturer-recommended substitute for the obsolete RC14KB220R. Selection of this substitute is supported by:

• Active product status ensuring long-term availability and supply chain continuity
• Maintained RoHS3 compliance for regulatory requirements
• Improved tolerance specification (±5% versus ±10%) providing tighter resistance accuracy
• Higher power rating (0.5W versus 0.25W) offering additional thermal margin in circuit applications
• Identical axial package configuration enabling direct mechanical compatibility
• Pulse withstanding capability retained for transient protection applications
• Extended operating temperature range (-55°C to 155°C) covering the original specification

Frequently Asked Questions (FAQ)

Q: Can the ASRM12JB220R be used as a direct replacement for the RC14KB220R?

A: Yes. Both parts share identical resistance values, axial package configuration, and operating temperature ranges that overlap. The substitute meets or exceeds all critical electrical parameters of the original part.

Q: What is the significance of the tolerance change from ±10% to ±5%?

A: The tighter tolerance of the substitute part provides improved resistance accuracy. This is a beneficial change that does not compromise compatibility; circuits designed for ±10% tolerance will function correctly with ±5% components.

Q: Why is the power rating different between the two parts?

A: The ASRM12JB220R has a 0.5W rating compared to the RC14KB220R's 0.25W rating. The higher power rating provides additional thermal capacity and design margin. The substitute will not be negatively affected by lower power dissipation requirements in the original application.

Q: Are there physical size differences between these parts?

A: Yes. The ASRM12JB220R has slightly larger dimensions (0.118" Dia x 0.354" L) compared to the RC14KB220R (0.094" Dia x 0.248" L). Both maintain axial package configuration. Verify PCB layout and mechanical clearances before substitution.

Q: Does the composition change from carbon composition to metal film affect performance?

A: Both compositions are standard resistor technologies suitable for general-purpose applications. The metal film composition of the substitute offers improved stability and lower noise characteristics while maintaining pulse withstanding capability.

Q: Is the ASRM12JB220R RoHS compliant?

A: Yes. The ASRM12JB220R maintains ROHS3 compliance, matching the regulatory status of the original RC14KB220R.