RC14JB270R Equivalent & Substitute Parts

Part Overview

The RC14JB270R is a 270 Ohm ±5% 1/4W axial through-hole resistor manufactured by Stackpole Electronics Inc. This carbon composition resistor features non-inductive and pulse withstanding characteristics, designed for applications requiring reliable performance across the -55°C to 125°C operating temperature range. The product is currently obsolete, making equivalent substitutes necessary for ongoing maintenance, repair, and legacy system support.

Substiute Parts

RC14JB270R

Stackpole Electronics IncIn Stock: 835RC14JB270R Datasheet

Current PartRFQ

ASRM12JB270R

Stackpole Electronics IncIn Stock: 1184ASRM12JB270R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RC14JB270R is determined by the following critical parameters:

• Resistance Value: Must be 270 Ohms
• Tolerance: Must be ±5% or tighter
• Package Type: Must be Axial through-hole configuration
• Minimum Power Rating: Must be equal to or greater than 0.25W
• Operating Temperature Range: Must encompass or exceed -55°C ~ 125°C
• Compliance: Must maintain RoHS3 compliance

The ASRM12JB270R qualifies as a direct substitute based on these parameters. While it features a higher power rating (0.5W vs 0.25W) and different composition (metal film vs carbon composition), both characteristics are acceptable for substitution purposes. The higher power rating provides additional thermal margin, and metal film composition offers improved stability. The substitute maintains the required resistance, tolerance, axial package, and compliance standards.

Parameter Comparison

Engineering Selection Recommendations

The ASRM12JB270R is the qualified substitute for the obsolete RC14JB270R. Selection is based on the following engineering criteria:

• Electrical Equivalence: Both parts maintain 270 Ohms ±5% resistance specification, ensuring functional compatibility in circuit applications.
• Package Compatibility: Axial through-hole configuration is identical, allowing direct board-level replacement without layout modifications.
• Compliance Status: The substitute maintains ROHS3 compliance, meeting current regulatory requirements for component procurement and assembly.
• Product Availability: The substitute is in active production status with confirmed inventory, ensuring reliable sourcing for ongoing requirements.
• Thermal Performance: The extended operating temperature range (-55°C ~ 155°C) of the substitute provides additional margin beyond the original specification (-55°C ~ 125°C).

Frequently Asked Questions (FAQ)

Q: Can the ASRM12JB270R be used as a direct replacement for the RC14JB270R?

A: Yes. Both resistors share identical resistance (270 Ohms), tolerance (±5%), and axial package configuration. The substitute meets all electrical and mechanical requirements for direct substitution.

Q: Why does the substitute have a higher power rating (0.5W vs 0.25W)?

A: A higher power rating is acceptable for substitution. It provides additional thermal margin and does not negatively impact circuit performance. The resistor will operate within safe limits in applications designed for the original 0.25W specification.

Q: Are there dimensional differences between these parts?

A: Yes. The ASRM12JB270R is physically larger (0.118" Dia x 0.354" L) compared to the RC14JB270R (0.094" Dia x 0.248" L). Board layout must accommodate the larger axial package dimensions during replacement.

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

A: Metal film composition offers improved frequency response and stability characteristics compared to carbon composition. For most applications, this represents a performance enhancement. Specific circuit requirements should be evaluated if frequency-dependent behavior is critical.

Q: Are both parts RoHS compliant?

A: Yes. Both the RC14JB270R and ASRM12JB270R maintain ROHS3 compliance, meeting current environmental and regulatory standards for component procurement.

Q: What is the availability status of the substitute?

A: The ASRM12JB270R is in active production with confirmed inventory availability, ensuring reliable sourcing for current and future requirements.