CB3JB1R80 Equivalent & Substitute Parts

Part Overview

The CB3JB1R80 is a 1.8 Ohms ±5% 3W through-hole axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is designed for applications requiring flame-proof and moisture-resistant performance in high-power dissipation circuits. The part maintains Active product status with 1044 units in current inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same resistance value, tolerance, power rating, and package type.

Substiute Parts

CB3JB1R80

Stackpole Electronics IncIn Stock: 1089CB3JB1R80 Datasheet

Current PartRFQ

PNP300JR-73-1R8

YAGEOIn Stock: 9955PNP300JR-73-1R8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CB3JB1R80 are qualified based on the following critical parameters:

• Resistance value: 1.8 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 and REACH Unaffected status

The PNP300JR-73-1R8 from YAGEO meets all core electrical and mechanical substitution criteria. Both parts share identical resistance, tolerance, power rating, composition, and package configuration. Compliance certifications align across both components.

Parameter Comparison

Engineering Selection Recommendations

Both the CB3JB1R80 and PNP300JR-73-1R8 are Active products with ROHS3 compliance and REACH Unaffected status, qualifying them for equivalent use in applications requiring 1.8 Ohms ±5% 3W axial wirewound resistors. The primary distinction between these parts is the operating temperature range: the CB3JB1R80 supports -55°C ~ 275°C, while the PNP300JR-73-1R8 operates within -40°C ~ 200°C. Component selection should be based on the specific thermal requirements of the target application. Physical dimensions differ between the two parts; PCB layout and mechanical clearance must be verified during integration.

Frequently Asked Questions (FAQ)

Q: Can the PNP300JR-73-1R8 replace the CB3JB1R80 in all applications?

A: The PNP300JR-73-1R8 is electrically equivalent for circuits operating within the -40°C ~ 200°C temperature range. Applications requiring operation below -40°C or above 200°C must use the CB3JB1R80 to maintain specified performance.

Q: Are there physical compatibility concerns between these parts?

A: Yes. The CB3JB1R80 measures 0.315" Square x 0.866" L, while the PNP300JR-73-1R8 measures 0.181" Dia x 0.453" L. PCB footprint and mechanical clearance must be verified before substitution.

Q: Do both parts meet the same regulatory requirements?

A: Both parts are ROHS3 Compliant and REACH Unaffected, meeting equivalent regulatory standards for the specified applications.

Q: What is the key difference in electrical specifications?

A: Both parts share identical resistance (1.8 Ohms), tolerance (±5%), power rating (3W), and composition (Wirewound). The temperature coefficient is specified for the CB3JB1R80 (±500ppm/°C) but not provided for the PNP300JR-73-1R8.

Q: Which part should be selected for high-temperature applications?

A: The CB3JB1R80 is rated to 275°C and is the appropriate choice for applications exceeding 200°C. The PNP300JR-73-1R8 is limited to 200°C maximum operating temperature.