CB3JB2R20 Equivalent & Substitute Parts

Part Overview

The CB3JB2R20 is a 2.2 Ohm, 3W wirewound axial resistor manufactured by Stackpole Electronics Inc. This through-hole component features flame-proof and moisture-resistant construction with ±5% tolerance, designed for applications requiring reliable power dissipation in harsh environments. The part maintains Active product status with 852 units currently in stock. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers.

Substiute Parts

CB3JB2R20

Stackpole Electronics IncIn Stock: 883CB3JB2R20 Datasheet

Current PartRFQ

PNP300JR-73-2R2

YAGEOIn Stock: 3106PNP300JR-73-2R2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CB3JB2R20 is determined by the following critical parameters:

• Resistance value: 2.2 Ohms (exact match required)
• Tolerance: ±5% (exact match required)
• Power rating: 3W (exact match required)
• Package type: Axial (exact match required)
• Composition: Wirewound (exact match required)
• Regulatory compliance: ROHS3 Compliant (minimum requirement)

The PNP300JR-73-2R2 from YAGEO meets all core electrical and mechanical substitution criteria. Both parts share identical resistance, tolerance, power rating, composition, and package configuration. Both maintain ROHS3 compliance and EAR99 ECCN classification. Physical dimensions differ due to manufacturer design variations, but both are axial through-hole components suitable for standard PCB mounting.

Parameter Comparison

Engineering Selection Recommendations

Both the CB3JB2R20 and PNP300JR-73-2R2 are Active status components with full ROHS3 compliance and REACH Unaffected designation. Selection between these parts should be based on application-specific requirements:

The CB3JB2R20 supports an extended operating temperature range of -55°C to 275°C, making it suitable for extreme temperature environments. The PNP300JR-73-2R2 operates within -40°C to 200°C, appropriate for standard industrial and commercial applications. Both parts are wirewound 3W axial resistors with identical electrical specifications and are suitable for direct substitution in circuits where the operating temperature range of the PNP300JR-73-2R2 is acceptable. Physical dimensions differ; the PNP300JR-73-2R2 is significantly smaller, which may influence PCB layout considerations.

Frequently Asked Questions (FAQ)

Q: Can the PNP300JR-73-2R2 directly replace the CB3JB2R20 in all applications?

A: Direct substitution is valid when the application operating temperature does not exceed 200°C. The PNP300JR-73-2R2 has a maximum operating temperature of 200°C compared to the CB3JB2R20's 275°C. If your circuit operates within -40°C to 200°C, the PNP300JR-73-2R2 is electrically and mechanically compatible.

Q: Are there dimensional compatibility concerns?

A: Both parts are axial through-hole resistors and mount identically on standard PCB layouts. The PNP300JR-73-2R2 is physically smaller (4.60mm diameter x 11.50mm length versus 8.00mm x 22.00mm), which may provide layout advantages but does not affect electrical performance or mounting compatibility.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the CB3JB2R20 and PNP300JR-73-2R2 are ROHS3 Compliant, REACH Unaffected, and classified as EAR99 for export control purposes.

Q: What is the difference between "Flame Proof" and "Flame Retardant Coating"?

A: Both designations indicate fire safety features. The CB3JB2R20 specifies flame-proof construction, while the PNP300JR-73-2R2 uses flame-retardant coating. Both meet safety standards for wirewound resistor applications.

Q: Which part should I select for new designs?

A: Selection depends on operating temperature requirements. For applications within -40°C to 200°C, either part is suitable. For extended temperature ranges or extreme environments, the CB3JB2R20 is required. Both parts are Active status with established supply chains.