CBT50J33R Equivalent & Substitute Parts

Part Overview

The CBT50J33R is a 33 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 CBT50J33R is classified as obsolete, necessitating identification of equivalent substitute components for ongoing procurement and design requirements.

Substiute Parts

CBT50J33R

TE Connectivity Passive ProductIn Stock: 902CBT50J33R Datasheet

Current PartRFQ

CBT50K33R

TE Connectivity Passive ProductIn Stock: 1141CBT50K33R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CBT50J33R is determined by the following critical parameters:

Resistance Value: The substitute must provide 33 Ohms nominal resistance to maintain circuit functionality.

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

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.

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

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

Tolerance: While the original part specifies ±5% tolerance, substitutes with relaxed tolerance specifications (±10%) remain functionally compatible when circuit design margins accommodate the wider tolerance band.

Parameter Comparison

Engineering Selection Recommendations

The CBT50K33R serves as the manufacturer-recommended substitute for the obsolete CBT50J33R. Both components are manufactured by TE Connectivity Passive Product within the CBT/Neohm series and share identical mechanical and thermal specifications.

The primary distinction between these components is tolerance specification: the CBT50J33R provides ±5% tolerance, while the CBT50K33R provides ±10% tolerance. This tolerance relaxation does not affect substitution viability when circuit design accommodates the wider resistance band. The CBT50K33R maintains active product status, ensuring continued availability and supply chain reliability.

Both components comply with ROHS3 requirements and carry identical ECCN (EAR99) and HTSUS (8533.10.0060) classifications, supporting regulatory and export compliance requirements.

The CBT50K33R is available in higher inventory quantities (1048 Pcs) compared to the original part (806 Pcs), supporting procurement efficiency for new designs and legacy system maintenance.

Frequently Asked Questions (FAQ)

Q: Can the CBT50K33R directly replace the CBT50J33R in existing designs?

A: Yes. Both components share identical resistance value (33 Ohms), power rating (0.5W), package type (axial), physical dimensions (0.142" Dia x 0.374" L), operating temperature range (-55°C to 125°C), and composition (carbon composition). The tolerance difference (±10% versus ±5%) does not prevent direct substitution when circuit design margins accommodate the wider tolerance band.

Q: What is the impact of the tolerance difference between these parts?

A: The CBT50J33R specifies ±5% tolerance, while the CBT50K33R specifies ±10% tolerance. This means the CBT50K33R resistance value may deviate up to ±10% from the 33 Ohm nominal value. Circuit designs must verify that this wider tolerance band remains within acceptable operating parameters for the application.

Q: Are the physical dimensions identical between these components?

A: Yes. Both the CBT50J33R and CBT50K33R measure 0.142" diameter by 0.374" length (3.60mm x 9.50mm). They are mechanically interchangeable and require no PCB layout modifications.

Q: What is the significance of the "Pulse Withstanding" feature?

A: Both components incorporate pulse withstanding capability, indicating they are designed to tolerate transient overvoltage conditions without degradation. This feature is retained in the substitute component.

Q: Why is the CBT50J33R classified as obsolete?

A: The CBT50J33R is no longer in active production. The CBT50K33R represents the active product continuation within the TE Connectivity CBT/Neohm series, providing equivalent functionality with relaxed tolerance specifications.

Q: Are there compliance differences between these components?

A: Both components carry identical ECCN (EAR99) and HTSUS (8533.10.0060) classifications. The CBT50J33R is confirmed ROHS3 compliant; the CBT50K33R RoHS status is not specified in available documentation.