WRF3JB1R00 Equivalent & Substitute Parts

Part Overview

The WRF3JB1R00 is a 1 Ohm ±5% 3W through-hole axial wirewound resistor manufactured by Stackpole Electronics Inc. This component features flame-proof and moisture-resistant construction with safety-rated design, suitable for high-power applications requiring reliable current limiting or load resistance functions.

The WRF3JB1R00 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

WRF3JB1R00

Stackpole Electronics IncIn Stock: 928WRF3JB1R00 Datasheet

Current PartRFQ

CB2JBR470

Stackpole Electronics IncIn Stock: 861CB2JBR470 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WRF3JB1R00 is constrained by the following critical parameters:

• Resistance Value: The substitute must provide 1 Ohm nominal resistance to maintain circuit function and load characteristics
• Tolerance: ±5% tolerance ensures equivalent precision in current limiting and voltage division applications
• Power Rating: Minimum 3W rating required to handle thermal dissipation without component failure
• Package Type: Axial through-hole package maintains mechanical and electrical compatibility with existing PCB layouts
• Composition: Wirewound construction provides the thermal stability and precision required for this application class
• Compliance: ROHS3 compliance and REACH unaffected status ensure regulatory alignment

The identified substitute CB2JBR470 does not meet the resistance value requirement (470 mOhms vs. 1 Ohm) and therefore cannot function as a direct equivalent for this application. No suitable substitute meeting all critical parameters is available from the provided data.

Parameter Comparison

Engineering Selection Recommendations

Based on the provided component data, the CB2JBR470 listed as a substitute does not meet the electrical requirements for direct substitution. The resistance value mismatch (470 mOhms versus 1 Ohm) represents a fundamental incompatibility that would alter circuit behavior and performance.

For applications requiring the WRF3JB1R00, component selection must prioritize:

• Exact resistance value matching (1 Ohm nominal)
• Minimum 3W power rating to ensure thermal margin
• Axial through-hole package for PCB compatibility
• Wirewound composition for precision and stability
• ROHS3 compliance for regulatory requirements

When the WRF3JB1R00 is unavailable, consult the full Stackpole Electronics Inc product portfolio or equivalent manufacturers for 1 Ohm, 3W, ±5% tolerance wirewound axial resistors meeting these specifications.

Frequently Asked Questions (FAQ)

Q: Can CB2JBR470 replace WRF3JB1R00 in my circuit?

A: No. The CB2JBR470 has a resistance value of 470 mOhms, while the WRF3JB1R00 requires 1 Ohm. This difference will cause incorrect circuit operation. Additionally, the CB2JBR470 power rating is 2W, below the required 3W specification.

Q: What makes a resistor a valid substitute for the WRF3JB1R00?

A: A valid substitute must match the following parameters: 1 Ohm resistance, ±5% tolerance, minimum 3W power rating, axial through-hole package, wirewound composition, and ROHS3 compliance. Deviations in any of these parameters render the substitute incompatible.

Q: Is the axial package type critical for substitution?

A: Yes. The axial through-hole package is mechanically and electrically integrated into the PCB design. Substitutes must use the same package type to ensure proper fit and electrical connection.

Q: Does the higher operating temperature range of CB2JBR470 make it suitable?

A: No. While the extended temperature range (-55°C to 275°C) of the CB2JBR470 is advantageous, it cannot compensate for the resistance value and power rating mismatches, which are fundamental incompatibilities.

Q: What should I do if the WRF3JB1R00 is unavailable?

A: Contact Stackpole Electronics Inc or authorized distributors for alternative 1 Ohm, 3W, ±5% tolerance wirewound axial resistors. Verify all electrical and mechanical parameters before design implementation.