CB3JB3R90 Equivalent & Substitute Parts

Part Overview

The CB3JB3R90 is a 3.9 Ohms ±5% 3W through-hole axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is designed for applications requiring reliable power dissipation with flame-proof and moisture-resistant characteristics. The part maintains Active product status with 698 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

CB3JB3R90

Stackpole Electronics IncIn Stock: 716CB3JB3R90 Datasheet

Current PartRFQ

PNP300JR-73-3R9

YAGEOIn Stock: 1220PNP300JR-73-3R9 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CB3JB3R90 are qualified based on the following critical parameters:

• Resistance value: 3.9 Ohms (exact match required)
• Tolerance: ±5% (electrical accuracy specification)
• Power rating: 3W (thermal dissipation capability)
• Composition: Wirewound (construction type)
• Package: Axial (mechanical form factor and PCB compatibility)
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected, EAR99 classification

The PNP300JR-73-3R9 from YAGEO meets all core electrical and mechanical requirements for direct substitution. Both parts share identical resistance, tolerance, power rating, composition, and package configuration. Regulatory certifications align across both components.

Parameter Comparison

Engineering Selection Recommendations

Both the CB3JB3R90 and PNP300JR-73-3R9 are Active status components with ROHS3 compliance and REACH Unaffected certification. Selection between these parts should be based on application-specific requirements:

The CB3JB3R90 supports an extended operating temperature range of -55°C to 275°C with a specified temperature coefficient of ±200ppm/°C, making it suitable for high-temperature environments. The PNP300JR-73-3R9 operates within -40°C to 200°C, appropriate for standard industrial and commercial applications. Both components provide equivalent electrical performance at 3.9 Ohms ±5% with 3W power dissipation in axial wirewound construction.

Packaging format differs between the two parts: CB3JB3R90 is supplied in Bulk packaging, while PNP300JR-73-3R9 is supplied in Cut Tape format. This distinction affects procurement and assembly workflows but does not impact electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can PNP300JR-73-3R9 replace CB3JB3R90 in all applications?

A: The PNP300JR-73-3R9 is electrically and mechanically compatible for applications operating within -40°C to 200°C. Applications requiring operation below -40°C or above 200°C must use the CB3JB3R90 due to its extended temperature range of -55°C to 275°C.

Q: Are the physical dimensions compatible between these parts?

A: Both parts use axial package configuration. The CB3JB3R90 measures 0.315" Square x 0.866" L (8.00mm x 22.00mm), while the PNP300JR-73-3R9 measures 0.181" Dia x 0.453" L (4.60mm x 11.50mm). The PNP300JR-73-3R9 is physically smaller and will fit in PCB layouts designed for the CB3JB3R90, but layout verification is required for tight spacing applications.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the CB3JB3R90 and PNP300JR-73-3R9 are ROHS3 Compliant, REACH Unaffected, and classified as EAR99 under ECCN regulations.

Q: What is the difference in packaging format?

A: The CB3JB3R90 is supplied in Bulk packaging, suitable for manual assembly or loose component handling. The PNP300JR-73-3R9 is supplied in Cut Tape format, optimized for automated pick-and-place assembly equipment.

Q: Are the temperature coefficients equivalent?

A: The CB3JB3R90 specifies a temperature coefficient of ±200ppm/°C. The PNP300JR-73-3R9 does not provide a temperature coefficient specification in the available data. Applications requiring precise temperature coefficient performance should prioritize the CB3JB3R90.