CBT50J27R Equivalent & Substitute Parts

Part Overview

The CBT50J27R is a 27 Ohm, ±5% tolerance, 0.5W (1/2W) through-hole axial resistor manufactured by TE Connectivity Passive Product. This component is a carbon composition resistor with pulse withstanding capability, designed for applications requiring reliable performance across the -55°C to 125°C operating temperature range. The CBT50J27R is classified as obsolete, necessitating identification of equivalent substitute components for ongoing procurement and design requirements.

Substiute Parts

CBT50J27R

TE Connectivity Passive ProductIn Stock: 765CBT50J27R Datasheet

Current PartRFQ

CBT50K27R

TE Connectivity Passive ProductIn Stock: 1101CBT50K27R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CBT50J27R is determined by the following critical parameters:

Resistance Value: The substitute must provide 27 Ohms nominal resistance to maintain circuit functionality.

Power Rating: The substitute must support 0.5W (1/2W) minimum to ensure thermal performance equivalence.

Package Type: The substitute must utilize axial through-hole packaging with identical physical dimensions (0.142" Dia x 0.374" L) to ensure mechanical compatibility with existing PCB layouts and assembly processes.

Operating Temperature Range: The substitute must support the full -55°C to 125°C operating temperature range.

Composition: The substitute must be carbon composition construction to maintain electrical characteristics consistent with the original design.

Tolerance: While tolerance may vary within acceptable limits for the application, the substitute tolerance must not exceed the original specification in a manner that compromises circuit performance.

The CBT50K27R meets all substitution criteria as a direct equivalent, with the exception of tolerance specification (±10% versus ±5%), which represents a relaxation of the tolerance requirement.

Parameter Comparison

Engineering Selection Recommendations

The CBT50K27R is the manufacturer-recommended substitute for the obsolete CBT50J27R. Both components are manufactured by TE Connectivity Passive Product and share identical electrical and mechanical specifications with the exception of tolerance classification.

Product Status Consideration: The CBT50J27R is classified as obsolete, while the CBT50K27R maintains active product status. This distinction ensures continued availability and manufacturing support for the substitute component.

Compliance Status: The CBT50J27R is confirmed ROHS3 compliant. The CBT50K27R compliance status is not specified in the provided data; however, as an active product from the same manufacturer in the same series, it is expected to maintain equivalent compliance standards.

Tolerance Trade-off: The primary specification difference is tolerance: CBT50J27R specifies ±5% while CBT50K27R specifies ±10%. This represents a relaxation of tolerance requirements. Applications requiring strict ±5% tolerance control must evaluate circuit-level impact before substitution.

Inventory Availability: The CBT50K27R demonstrates superior inventory availability (1074 Pcs) compared to the CBT50J27R (738 Pcs), supporting long-term procurement reliability.

Frequently Asked Questions (FAQ)

Q: Can the CBT50K27R directly replace the CBT50J27R in existing designs?

A: The CBT50K27R provides direct mechanical and electrical substitution for the CBT50J27R. Both components share identical resistance values, power ratings, package types, physical dimensions, and operating temperature ranges. The tolerance specification difference (±10% versus ±5%) must be evaluated within the context of circuit requirements.

Q: What is the significance of the tolerance difference between these components?

A: The CBT50J27R specifies ±5% tolerance, while the CBT50K27R specifies ±10% tolerance. This means the CBT50K27R allows a wider range of actual resistance values around the 27 Ohm nominal. Applications with tight tolerance requirements must confirm that the ±10% tolerance band remains acceptable for circuit performance.

Q: Are the physical dimensions identical between these components?

A: Yes. Both the CBT50J27R and CBT50K27R share identical physical dimensions of 0.142" Dia x 0.374" L (3.60mm x 9.50mm). This ensures mechanical compatibility with existing PCB layouts, mounting fixtures, and assembly processes without modification.

Q: Why is the CBT50J27R classified as obsolete?

A: The CBT50J27R is an obsolete product, meaning TE Connectivity Passive Product has discontinued active manufacturing and support. The CBT50K27R, as an active product, provides continued availability and manufacturing support for applications requiring 27 Ohm, 0.5W axial carbon composition resistors.

Q: Do both components support pulse withstanding applications?

A: Yes. Both the CBT50J27R and CBT50K27R are specified with pulse withstanding capability, making them suitable for applications requiring transient overvoltage protection and pulse energy absorption.

Q: What is the operating temperature range for these components?

A: Both components operate across the -55°C to 125°C temperature range, providing equivalent thermal performance across industrial and extended temperature applications.

Q: Are there any compliance or certification differences between these components?

A: The CBT50J27R is confirmed ROHS3 compliant. The CBT50K27R compliance status is not specified in the provided documentation. Both components share identical ECCN (EAR99) and HTSUS (8533.10.0060) classifications.