WRF1JB1R00 Equivalent & Substitute Parts

Part Overview

The WRF1JB1R00 is a 1 Ohm ±5% 1W axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design and procurement requirements. The part features flame-proof and moisture-resistant construction suitable for through-hole applications requiring safety-rated wirewound resistors.

Substiute Parts

WRF1JB1R00

Stackpole Electronics IncIn Stock: 1186WRF1JB1R00 Datasheet

Current PartRFQ

CB2JB68R0

Stackpole Electronics IncIn Stock: 685CB2JB68R0 Datasheet

DirectRFQ

CB2JB1R00

Stackpole Electronics IncIn Stock: 829CB2JB1R00 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WRF1JB1R00 are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Resistance value: 1 Ohms
• Tolerance: ±5%
• Composition: Wirewound
• Package: Axial
• Features: Flame Proof, Moisture Resistant, Safety

Secondary Compatibility Factors:

• Power rating equal to or greater than 1W
• Operating temperature range that encompasses or exceeds -55°C ~ 200°C
• RoHS3 compliance maintained
• Active product status for ongoing availability

The CB2JB1R00 meets all primary and secondary criteria as a direct functional equivalent. The CB2JB68R0 differs in resistance value (68 Ohms vs. 1 Ohm) and does not qualify as a substitute for this specific application.

Parameter Comparison

Engineering Selection Recommendations

The CB2JB1R00 is the qualified substitute for the obsolete WRF1JB1R00. Both parts share identical electrical specifications for resistance and tolerance, maintain equivalent mechanical packaging in axial configuration, and preserve all safety-related features including flame-proof and moisture-resistant construction.

The CB2JB1R00 provides enhanced performance characteristics: increased power rating (2W vs. 1W), extended operating temperature range (-55°C ~ 275°C vs. -55°C ~ 200°C), and improved temperature coefficient stability (±200ppm/°C vs. -80/+900ppm/°C). These enhancements ensure compatibility with the original design while providing additional thermal and power margin.

Both parts maintain ROHS3 compliance and equivalent regulatory certifications (ECCN: EAR99, HTSUS: 8533.21.0080). The CB2JB1R00 holds active product status, ensuring long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can CB2JB1R00 be used as a direct replacement for WRF1JB1R00?

A: Yes. Both parts share identical resistance (1 Ohm), tolerance (±5%), composition (wirewound), and package type (axial). The CB2JB1R00 meets or exceeds all electrical and mechanical requirements of the original part.

Q: What are the physical dimension differences between these parts?

A: WRF1JB1R00 dimensions are 0.197" Dia x 0.433" L (5.00mm x 11.00mm). CB2JB1R00 dimensions are 0.252" Square x 0.709" L (6.40mm x 18.00mm). The substitute is larger due to its higher power rating. PCB layout and mounting clearance must be verified for space-constrained applications.

Q: Why does CB2JB1R00 have a higher power rating?

A: The 2W rating of CB2JB1R00 versus the 1W rating of WRF1JB1R00 reflects the physical size increase necessary to dissipate additional thermal energy. This provides design margin and improved reliability in applications approaching the original 1W specification.

Q: Are there compliance or certification differences?

A: Both parts maintain ROHS3 compliance, REACH unaffected status, and identical regulatory classifications. No compliance barriers exist for substitution.

Q: Is CB2JB68R0 a suitable substitute?

A: No. CB2JB68R0 has a resistance value of 68 Ohms, which does not match the required 1 Ohm specification. Resistance value is a primary selection criterion and cannot be substituted.