WRF3JB150R Equivalent & Substitute Parts

Part Overview

The WRF3JB150R is a 150 Ohm, 3W axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part features flame-proof and moisture-resistant construction with safety-rated wirewound composition, suitable for applications requiring robust thermal and environmental performance.

Substiute Parts

WRF3JB150R

Stackpole Electronics IncIn Stock: 1072WRF3JB150R Datasheet

Current PartRFQ

CB2JBR470

Stackpole Electronics IncIn Stock: 861CB2JBR470 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute identification for the WRF3JB150R is constrained by the following critical parameters:

• Resistance value and tolerance must match or be functionally equivalent within circuit design constraints
• Power rating must meet or exceed the original specification
• Composition type (wirewound) and safety features must be maintained
• Package configuration (axial through-hole) must be compatible with existing PCB layouts
• Operating temperature range must support the application environment
• Regulatory compliance (RoHS3, REACH) must be maintained

The CB2JBR470 listed in the substitute field does not meet the resistance value requirement (470 mOhms vs. 150 Ohms) and represents a different functional component. This part cannot serve as a direct substitute for the WRF3JB150R based on resistance specification alone.

Parameter Comparison

Engineering Selection Recommendations

Based on provided specifications and compliance data:

The CB2JBR470 does not qualify as a functional substitute for the WRF3JB150R. The resistance value differential (150 Ohms vs. 470 mOhms) represents a 318:1 ratio, making this component unsuitable for direct replacement in circuits designed for the original part.

Additionally, the power rating of the CB2JBR470 (2W) falls below the WRF3JB150R specification (3W), creating potential thermal stress in applications requiring the full 3W capacity.

For applications requiring the WRF3JB150R, component selection must prioritize:

• Exact or functionally equivalent resistance value (150 Ohms ±5%)
• Power rating of 3W or greater
• Axial wirewound construction with flame-proof and moisture-resistant properties
• Compliance with ROHS3 and REACH requirements
• Operating temperature range supporting -55°C to 225°C minimum

Frequently Asked Questions (FAQ)

Q: Can the CB2JBR470 replace the WRF3JB150R in my circuit?

A: No. The CB2JBR470 has a resistance value of 470 mOhms, while the WRF3JB150R is rated at 150 Ohms. These are fundamentally different components with incompatible electrical characteristics. Additionally, the CB2JBR470 power rating (2W) is insufficient for applications requiring the 3W specification.

Q: Why is the WRF3JB150R listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active alternatives with identical or superior specifications should be sourced for new designs and production continuity.

Q: What parameters must match for a valid substitute?

A: Critical parameters include resistance value (150 Ohms), tolerance (±5%), power rating (3W minimum), composition (wirewound), package type (axial), and operating temperature range (-55°C to 225°C minimum). Regulatory compliance (RoHS3, REACH) must also be maintained.

Q: Are there dimensional constraints for substitution?

A: Yes. The WRF3JB150R has dimensions of 0.197" diameter × 0.630" length (5.00mm × 16.00mm). Substitute parts must fit within existing PCB footprints and mounting hardware specifications.

Q: Does the substitute need to have the same temperature coefficient?

A: The temperature coefficient should be evaluated based on circuit performance requirements. The WRF3JB150R specification is -80/+900 ppm/°C. Substitutes with comparable or superior stability characteristics are preferred for precision applications.