CB3JB1R20 Equivalent & Substitute Parts

Part Overview

The CB3JB1R20 is a 1.2 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 1089 units in current inventory. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers.

Substiute Parts

CB3JB1R20

Stackpole Electronics IncIn Stock: 1178CB3JB1R20 Datasheet

Current PartRFQ

PNP300JR-73-1R2

YAGEOIn Stock: 7393PNP300JR-73-1R2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CB3JB1R20 is determined by strict equivalence across the following parameters:

• Resistance value: 1.2 Ohms
• Tolerance: ±5%
• Power rating: 3W
• Composition: Wirewound
• Package: Axial through-hole
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected, EAR99 classification

The PNP300JR-73-1R2 from YAGEO meets all core electrical and mechanical requirements. Both parts share identical resistance, tolerance, power rating, and axial package configuration. Both maintain ROHS3 compliance and equivalent regulatory status. Differences in physical dimensions and operating temperature range are noted but do not preclude functional substitution in applications within the overlapping temperature window.

Parameter Comparison

Engineering Selection Recommendations

Both the CB3JB1R20 and PNP300JR-73-1R2 are active products with full ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current applications. Selection between these parts depends on application-specific constraints:

The CB3JB1R20 provides extended operating temperature range (-55°C to 275°C) and larger physical dimensions, suitable for high-temperature environments and applications with less stringent space constraints. The PNP300JR-73-1R2 offers compact form factor (4.60mm x 11.50mm) with adequate temperature range (-40°C to 200°C) for standard industrial and consumer applications. Both parts deliver identical electrical performance within the overlapping temperature window of -40°C to 200°C.

Frequently Asked Questions (FAQ)

Q: Can PNP300JR-73-1R2 replace CB3JB1R20 in all applications?

A: Substitution is valid for applications operating within -40°C to 200°C. Applications requiring operation below -40°C or above 200°C require the CB3JB1R20 due to its extended temperature range.

Q: Are the physical dimensions interchangeable?

A: Both parts use axial package configuration and are mechanically compatible with standard through-hole PCB layouts. The CB3JB1R20 is larger (8.00mm x 22.00mm) compared to PNP300JR-73-1R2 (4.60mm x 11.50mm). Space-constrained designs may require the compact YAGEO part.

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

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and classified as EAR99. Both carry safety-rated wirewound construction suitable for regulated applications.

Q: What is the difference between flame-proof and flame-retardant coating?

A: The CB3JB1R20 features flame-proof construction, while the PNP300JR-73-1R2 uses flame-retardant coating. Both provide fire safety characteristics appropriate for their respective operating environments and temperature ranges.

Q: Which part should be selected for new designs?

A: For new designs, either part is acceptable based on thermal and spatial requirements. The PNP300JR-73-1R2 offers cost efficiency and compact form factor for standard temperature ranges. The CB3JB1R20 is preferred for extended temperature applications or when flame-proof construction is explicitly required.