CB3JB39R0 Equivalent & Substitute Parts

Part Overview

The CB3JB39R0 is a 39 Ohm, 3W wirewound axial resistor manufactured by Stackpole Electronics Inc. This through-hole component features flame-proof and moisture-resistant construction with safety certification. The part is currently active in production with 856 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required for design flexibility, supply chain continuity, or inventory optimization.

Substiute Parts

CB3JB39R0

Stackpole Electronics IncIn Stock: 928CB3JB39R0 Datasheet

Current PartRFQ

PNP300JR-73-39R

YAGEOIn Stock: 6775PNP300JR-73-39R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CB3JB39R0 is determined by the following critical parameters:

• Resistance value: 39 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 3W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial through-hole (exact match required)
• Regulatory compliance: ROHS3 Compliant (minimum requirement)

The substitute part PNP300JR-73-39R meets all mandatory electrical and mechanical criteria for direct substitution in applications where the CB3JB39R0 is specified.

Parameter Comparison

Engineering Selection Recommendations

Both CB3JB39R0 and PNP300JR-73-39R are active production components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

The primary consideration for selection is operating temperature range. The CB3JB39R0 operates from -55°C to 275°C, while the PNP300JR-73-39R operates from -40°C to 200°C. Applications requiring operation below -40°C or above 200°C must use the CB3JB39R0. For applications within the -40°C to 200°C range, both parts are functionally equivalent.

Physical dimensions differ between the two parts. The CB3JB39R0 measures 0.315" square × 0.866" length (8.00mm × 22.00mm), while the PNP300JR-73-39R measures 0.181" diameter × 0.453" length (4.60mm × 11.50mm). PCB layout and mechanical clearance requirements must accommodate these dimensional differences.

Frequently Asked Questions (FAQ)

Q: Can PNP300JR-73-39R replace CB3JB39R0 in all applications?

A: PNP300JR-73-39R is electrically equivalent for resistance, tolerance, power rating, and composition. However, it has a narrower operating temperature range (-40°C to 200°C versus -55°C to 275°C) and different physical dimensions. Verify that your application's temperature requirements and PCB layout accommodate these differences.

Q: What are the key differences between these two parts?

A: The primary differences are operating temperature range and physical size. CB3JB39R0 supports extended low and high temperature operation, while PNP300JR-73-39R is more compact. Both are wirewound axial resistors with identical electrical specifications (39Ω, ±5%, 3W).

Q: Are both parts RoHS compliant?

A: Yes, both CB3JB39R0 and PNP300JR-73-39R are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic components.

Q: Does package type affect substitution?

A: Both parts use axial through-hole packaging, which is mechanically compatible. However, their physical dimensions differ significantly. Verify PCB hole spacing and component clearance before substitution.

Q: Which part should I select for new designs?

A: Selection depends on application requirements. For standard temperature range applications (-40°C to 200°C), either part is suitable. For extended temperature operation or space-constrained layouts, verify specific requirements against each part's specifications.