CB3JB3R30 Equivalent & Substitute Parts

Part Overview

The CB3JB3R30 is a 3.3 Ohm ±5% 3W axial wirewound resistor manufactured by Stackpole Electronics Inc. This through-hole component features flame-proof and moisture-resistant construction with safety-rated design, suitable for applications requiring reliable power dissipation in harsh environments. The part maintains Active product status with 754 units in current inventory. Substitute parts are identified to provide alternative sourcing options when the primary part becomes unavailable or when procurement lead times require parallel component qualification.

Substiute Parts

CB3JB3R30

Stackpole Electronics IncIn Stock: 846CB3JB3R30 Datasheet

Current PartRFQ

PNP300JR-73-3R3

YAGEOIn Stock: 10901PNP300JR-73-3R3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CB3JB3R30 is determined by strict equivalence across the following critical parameters:

• Resistance value: 3.3 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)
• Compliance: ROHS3 Compliant (minimum requirement)

The identified substitute PNP300JR-73-3R3 from YAGEO meets all mandatory electrical and mechanical parameters. Both parts are wirewound axial resistors with identical resistance, tolerance, and power specifications. Physical dimensions differ due to manufacturing design variations, but both conform to standard axial package specifications and maintain compatibility with standard PCB through-hole layouts.

Parameter Comparison

Engineering Selection Recommendations

Both the CB3JB3R30 and PNP300JR-73-3R3 are qualified substitutes based on electrical equivalence and regulatory compliance. Selection between these parts should consider the following factors:

The CB3JB3R30 provides extended operating temperature range (-55°C to 275°C) compared to the PNP300JR-73-3R3 (-40°C to 200°C). Applications requiring operation at temperatures below -40°C or above 200°C must use the Stackpole part.

The PNP300JR-73-3R3 offers significantly higher inventory availability (10,801 units) versus the CB3JB3R30 (754 units), supporting shorter procurement lead times when temperature constraints permit.

Physical dimensions differ substantially. The PNP300JR-73-3R3 is considerably smaller, which may influence PCB layout and thermal management considerations in space-constrained designs.

Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for commercial and industrial applications.

Frequently Asked Questions (FAQ)

Q: Can PNP300JR-73-3R3 replace CB3JB3R30 in all applications?

A: Electrical substitution is valid for applications operating within -40°C to 200°C. Applications requiring operation below -40°C or above 200°C must use the CB3JB3R30 due to its extended temperature range.

Q: Are the physical dimensions interchangeable?

A: Both parts use standard axial through-hole packaging and are mechanically compatible with PCB layouts designed for axial resistors. However, the PNP300JR-73-3R3 is significantly smaller (4.60mm diameter vs. 8.00mm square), which may affect thermal dissipation characteristics and board layout spacing.

Q: Do both parts meet the same safety and environmental standards?

A: Yes. Both CB3JB3R30 and PNP300JR-73-3R3 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for commercial and industrial electronics.

Q: What is the primary difference between these substitute parts?

A: The CB3JB3R30 features flame-proof and moisture-resistant construction with extended temperature capability (-55°C to 275°C), while the PNP300JR-73-3R3 uses flame-retardant coating with standard temperature range (-40°C to 200°C). Electrical performance is identical.

Q: Which part should be selected for new designs?

A: Selection depends on application temperature requirements and availability constraints. For designs requiring extended temperature operation, specify CB3JB3R30. For standard temperature range applications where lead time is critical, PNP300JR-73-3R3 offers superior availability.