CB3JB91R0 Equivalent & Substitute Parts

Part Overview

The CB3JB91R0 is a 91 Ohm, 3W axial wirewound 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 1033 units in stock. Equivalent parts are identified when applications require alternative sourcing due to inventory constraints, supply chain considerations, or design flexibility within specified electrical and mechanical tolerances.

Substiute Parts

CB3JB91R0

Stackpole Electronics IncIn Stock: 1087CB3JB91R0 Datasheet

Current PartRFQ

PNP300JR-73-91R

YAGEOIn Stock: 4583PNP300JR-73-91R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CB3JB91R0 is determined by the following critical parameters:

• Resistance value: 91 Ohms (exact match required)
• Tolerance: ±5% (defines acceptable resistance range)
• Power rating: 3W (minimum dissipation capability)
• Composition: Wirewound (thermal and stability characteristics)
• Package: Axial (mechanical fit and PCB compatibility)
• Regulatory compliance: ROHS3 and REACH status

The substitute part PNP300JR-73-91R meets these core electrical specifications. Variations in physical dimensions, temperature coefficient, and operating temperature range do not preclude substitution when the primary electrical parameters and package type align.

Parameter Comparison

Engineering Selection Recommendations

Both the CB3JB91R0 and PNP300JR-73-91R are active production components with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use.

The CB3JB91R0 provides a wider operating temperature range (-55°C to 275°C) and specified temperature coefficient (±200ppm/°C), making it suitable for applications requiring extended thermal performance. The PNP300JR-73-91R operates within -40°C to 200°C and features a more compact physical profile (4.60mm diameter vs. 8.00mm square cross-section), which may be advantageous in space-constrained layouts.

Selection between these parts should be based on specific application requirements regarding thermal operating range, physical space availability, and sourcing availability.

Frequently Asked Questions (FAQ)

Q: Can PNP300JR-73-91R replace CB3JB91R0 in all applications?

A: Both parts share identical electrical specifications (91 Ohms, ±5%, 3W, wirewound, axial package). The primary consideration is the operating temperature range. If your application operates within -40°C to 200°C, the PNP300JR-73-91R is electrically equivalent. Applications requiring operation below -40°C or above 200°C require the CB3JB91R0.

Q: What is the physical size difference between these parts?

A: The CB3JB91R0 measures 0.315" square by 0.866" length (8.00mm x 22.00mm). The PNP300JR-73-91R measures 0.181" diameter by 0.453" length (4.60mm x 11.50mm). The substitute is significantly smaller and may require PCB layout verification for mechanical fit.

Q: Are both parts RoHS compliant?

A: Yes, both CB3JB91R0 and PNP300JR-73-91R are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

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

A: Both designations indicate fire safety features. The CB3JB91R0 specifies flame-proof construction, while the PNP300JR-73-91R features flame-retardant coating. Both are safety-rated components suitable for general industrial applications.

Q: Which part should I select for new designs?

A: Selection depends on application-specific requirements. For designs requiring extended temperature operation (-55°C to 275°C) or specified temperature coefficient performance, use CB3JB91R0. For space-constrained applications within the -40°C to 200°C range, PNP300JR-73-91R is suitable.