PCB20JB3R00 Equivalent & Substitute Parts

Part Overview

The PCB20JB3R00 is a 3 Ohm, 5% tolerance, 20W axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is designed for through-hole applications requiring flame-proof and moisture-resistant construction with safety-rated performance. The part is currently listed as obsolete, making identification of compatible substitutes essential for ongoing system maintenance and new design implementations where equivalent specifications are required.

Substiute Parts

PCB20JB3R00

Stackpole Electronics IncIn Stock: 916PCB20JB3R00 Datasheet

Current PartRFQ

B20J3R0E

OhmiteIn Stock: 1045B20J3R0E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PCB20JB3R00 is determined by strict equivalence across the following critical parameters:

• Resistance Value: Must be 3 Ohms
• Tolerance: Must be ±5% or tighter
• Power Rating: Must be 20W or greater
• Package Configuration: Must be Axial through-hole
• Composition: Must be Wirewound
• Termination Count: Must be 2-pin

The substitute part B20J3R0E from Ohmite meets all mandatory electrical and mechanical criteria. Both parts share identical resistance, tolerance, power rating, composition, and package type. Functional equivalence is established through these matching specifications, enabling direct substitution in applications where the PCB20JB3R00 is specified.

Parameter Comparison

Engineering Selection Recommendations

The B20J3R0E from Ohmite is a direct functional equivalent to the obsolete PCB20JB3R00. Both components satisfy identical electrical specifications for resistance, tolerance, and power dissipation. The B20J3R0E offers the additional advantage of active product status, ensuring continued availability and supply chain reliability. Both parts maintain RoHS compliance, supporting regulatory requirements for modern applications. The B20J3R0E exhibits superior temperature coefficient performance (±400ppm/°C versus ±800ppm/°C), providing enhanced stability across the operating temperature range. For applications requiring the PCB20JB3R00, the B20J3R0E represents the appropriate substitute without design modification.

Frequently Asked Questions (FAQ)

Q: Can the B20J3R0E be used as a direct replacement for the PCB20JB3R00?

A: Yes. Both components share identical resistance (3 Ohms), tolerance (±5%), power rating (20W), composition (wirewound), and axial package configuration. Direct substitution is supported without circuit modification.

Q: Are there physical dimension differences between these parts?

A: Yes. The PCB20JB3R00 measures 2.500" L x 0.500" W (64.60mm x 12.70mm), while the B20J3R0E measures 0.437" Dia x 2.000" L (11.11mm x 50.80mm). Both are axial packages with identical electrical performance. Physical layout verification is required during board redesign or component placement updates.

Q: What is the significance of the temperature coefficient difference?

A: The B20J3R0E exhibits a temperature coefficient of ±400ppm/°C compared to the PCB20JB3R00 at ±800ppm/°C. This means the B20J3R0E maintains more stable resistance values across temperature variations, providing superior performance in thermally demanding applications.

Q: Are both parts RoHS compliant?

A: Yes. The PCB20JB3R00 is ROHS3 Compliant, and the B20J3R0E is RoHS Compliant. Both meet regulatory requirements for hazardous substance restrictions.

Q: Why is the PCB20JB3R00 listed as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Stackpole Electronics Inc. The B20J3R0E from Ohmite provides equivalent functionality with active product status, ensuring long-term availability.