CB3JB18R0 Equivalent & Substitute Parts

Part Overview

The CB3JB18R0 is an 18 Ohm, 3W wirewound axial resistor manufactured by Stackpole Electronics Inc. This component is designed for through-hole applications requiring flame-proof and moisture-resistant characteristics. The part maintains Active product status with 992 units currently in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to supply constraints, design flexibility, or application-specific requirements.

Substiute Parts

CB3JB18R0

Stackpole Electronics IncIn Stock: 1086CB3JB18R0 Datasheet

Current PartRFQ

PNP300JR-73-18R

YAGEOIn Stock: 7383PNP300JR-73-18R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CB3JB18R0 is determined by the following critical parameters:

• Resistance value: 18 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)
• Regulatory compliance: ROHS3 Compliant (minimum requirement)

The substitute part PNP300JR-73-18R meets all mandatory electrical specifications. Physical dimensions and operating temperature ranges may vary within acceptable limits for equivalent circuit performance.

Parameter Comparison

Engineering Selection Recommendations

Both the CB3JB18R0 and PNP300JR-73-18R are Active status components meeting ROHS3 compliance and REACH requirements. Selection between these parts should be based on:

• Operating temperature requirements: The CB3JB18R0 supports -55°C ~ 275°C, while the PNP300JR-73-18R operates within -40°C ~ 200°C. Applications requiring extended low-temperature operation below -40°C or high-temperature operation above 200°C necessitate the CB3JB18R0.
• Physical space constraints: The PNP300JR-73-18R features reduced dimensions (4.60mm diameter × 11.50mm length) compared to the CB3JB18R0 (8.00mm × 22.00mm), making it suitable for compact layouts.
• Supply availability: The PNP300JR-73-18R maintains higher inventory levels (7306 units) relative to the CB3JB18R0 (992 units).

Frequently Asked Questions (FAQ)

Q: Can PNP300JR-73-18R replace CB3JB18R0 in all applications?

A: Substitution is valid for applications operating within -40°C ~ 200°C. Applications requiring operation below -40°C or above 200°C must use the CB3JB18R0.

Q: Are the physical dimensions interchangeable?

A: Both parts use axial through-hole packaging and are mechanically compatible with standard PCB layouts. The PNP300JR-73-18R is physically smaller and may provide layout advantages in space-constrained designs.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the CB3JB18R0 and PNP300JR-73-18R are ROHS3 Compliant and REACH Unaffected.

Q: What is the significance of the temperature coefficient specification?

A: The CB3JB18R0 specifies ±200ppm/°C temperature coefficient. The PNP300JR-73-18R does not provide this specification. Applications requiring precise temperature stability should verify the PNP300JR-73-18R temperature coefficient with the manufacturer before substitution.

Q: Are both parts suitable for high-power applications?

A: Both components are rated for 3W continuous power dissipation with wirewound construction, providing thermal stability suitable for power applications within their respective operating temperature ranges.