RC14KT270R Equivalent & Substitute Parts

Part Overview

The RC14KT270R is a 270 Ohm ±10% 1/4W axial through-hole resistor manufactured by Stackpole Electronics Inc. This carbon composition resistor features non-inductive and pulse withstanding characteristics, with an operating temperature range of -55°C to 125°C. The product is currently obsolete, making equivalent substitutes necessary for ongoing applications and new designs requiring this resistance value and power rating.

Substiute Parts

RC14KT270R

Stackpole Electronics IncIn Stock: 1099RC14KT270R Datasheet

Current PartRFQ

ASRM12JB270R

Stackpole Electronics IncIn Stock: 1184ASRM12JB270R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the RC14KT270R is determined by the following critical parameters:

• Resistance Value: 270 Ohms (exact match required)
• Package Type: Axial through-hole configuration
• Power Rating: Minimum 0.25W; higher ratings acceptable for uprating applications
• Operating Temperature Range: Minimum -55°C to 125°C coverage
• Compliance: RoHS3 compliance maintained

The ASRM12JB270R qualifies as a substitute based on matching resistance value, axial package type, and exceeding the minimum power rating (0.5W vs. 0.25W). The substitute maintains RoHS3 compliance and extends the operating temperature range to 155°C, providing enhanced thermal performance.

Parameter Comparison

Engineering Selection Recommendations

The ASRM12JB270R is the manufacturer-recommended substitute for the obsolete RC14KT270R. Selection of this substitute is supported by:

• Active Product Status: The ASRM12JB270R is currently in active production, ensuring long-term availability and supply chain continuity.
• Compliance Alignment: Both parts maintain ROHS3 compliance, satisfying regulatory requirements for equivalent applications.
• Enhanced Specifications: The substitute provides improved tolerance (±5% vs. ±10%) and higher power rating (0.5W vs. 0.25W), enabling direct replacement in existing designs without derating concerns.
• Extended Temperature Range: Operating temperature coverage to 155°C exceeds the original specification, providing additional thermal margin for demanding environments.

Frequently Asked Questions (FAQ)

Q: Can the ASRM12JB270R directly replace the RC14KT270R in existing designs?

A: Yes. Both resistors share the same 270 Ohm resistance value, axial package configuration, and operating temperature minimum of -55°C. The substitute's higher power rating (0.5W vs. 0.25W) and improved tolerance (±5% vs. ±10%) make it suitable for direct substitution without circuit modification.

Q: What is the primary difference between these two resistors?

A: The main differences are composition (carbon composition vs. metal film), power rating (0.25W vs. 0.5W), tolerance (±10% vs. ±5%), and product status (obsolete vs. active). The metal film construction of the substitute provides superior tolerance and thermal stability.

Q: Are there any package dimension considerations for substitution?

A: Both resistors use axial through-hole packages. The ASRM12JB270R is slightly larger (0.118" Dia x 0.354" L vs. 0.094" Dia x 0.248" L). Verify PCB layout clearance before substitution in space-constrained applications.

Q: Does the substitute maintain the same compliance certifications?

A: Yes. Both the RC14KT270R and ASRM12JB270R are ROHS3 compliant and REACH unaffected, maintaining equivalent regulatory compliance for equivalent applications.

Q: Why is the substitute rated for higher power?

A: The ASRM12JB270R uses metal film construction, which provides superior thermal dissipation characteristics compared to carbon composition. This enables the higher 0.5W power rating while maintaining the same physical package category.