PCB20JB4R00 Equivalent & Substitute Parts

Part Overview

The PCB20JB4R00 is a 4 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 characteristics in safety-critical circuits. The part is currently listed as obsolete, making identification of compatible substitute components essential for ongoing system maintenance and new production builds requiring equivalent electrical and mechanical performance.

Substiute Parts

PCB20JB4R00

Stackpole Electronics IncIn Stock: 1004PCB20JB4R00 Datasheet

Current PartRFQ

B20J4R0E

OhmiteIn Stock: 991B20J4R0E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCB20JB4R00 is determined by strict equivalence across the following critical parameters:

• Resistance value: 4 Ohms (exact match required)
• Tolerance: ±5% (defines acceptable resistance variation)
• Power rating: 20W (thermal dissipation capability)
• Composition: Wirewound (construction type)
• Package: Axial (physical form factor and termination style)

The substitute part B20J4R0E from Ohmite meets all these core electrical and mechanical requirements. Both parts are ROHS3 compliant and maintain the same termination configuration (2 terminations, axial leads).

Parameter Comparison

Engineering Selection Recommendations

The B20J4R0E from Ohmite (Brown Devil® 200 series) is a direct functional equivalent to the obsolete PCB20JB4R00. Both components satisfy identical electrical specifications: 4 Ohm resistance, ±5% tolerance, and 20W power dissipation in axial wirewound construction.

The B20J4R0E offers the advantage of active product status, ensuring continued availability and supply chain reliability. Both parts maintain ROHS3 and REACH compliance, supporting regulatory requirements for modern applications.

The B20J4R0E exhibits a lower temperature coefficient (±400ppm/°C versus ±800ppm/°C), which provides improved stability across the operating temperature range. Physical dimensions differ slightly between the two parts, but both maintain standard axial lead spacing compatible with through-hole PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can the B20J4R0E be used as a direct replacement for PCB20JB4R00 in existing designs?

A: Yes. Both components share identical electrical specifications (4 Ohms, ±5%, 20W) and axial package configuration. PCB layout compatibility is maintained through standard axial lead spacing. Verify physical dimensions against available board space, as the B20J4R0E measures 0.437" diameter × 2.000" length compared to the PCB20JB4R00 at 0.500" width × 2.500" length.

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

A: The B20J4R0E temperature coefficient of ±400ppm/°C is superior to the PCB20JB4R00 at ±800ppm/°C. This means the B20J4R0E exhibits lower resistance drift across temperature variations, providing improved circuit stability in applications subject to thermal cycling or wide operating temperature ranges.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the PCB20JB4R00 and B20J4R0E are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance restrictions for electronic components.

Q: Why is the PCB20JB4R00 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The B20J4R0E maintains active product status, ensuring ongoing availability and manufacturer support for new production requirements and field replacements.