WRF1JB2R00 Equivalent & Substitute Parts

Part Overview

The WRF1JB2R00 is a 2 Ohms ±5% 1W axial wirewound resistor manufactured by Stackpole Electronics Inc. This component features flame-proof and moisture-resistant construction with safety-rated design, suitable for through-hole applications requiring reliable current limiting or load resistance in industrial and safety-critical circuits.

The WRF1JB2R00 is classified as obsolete. Locating equivalent or substitute components is necessary to support ongoing maintenance, repair, and new design implementations where this resistor specification is required.

Substiute Parts

WRF1JB2R00

Stackpole Electronics IncIn Stock: 789WRF1JB2R00 Datasheet

Current PartRFQ

CB2JBR220

Stackpole Electronics IncIn Stock: 977CB2JBR220 Datasheet

DirectRFQ

CB2JB2R00

Stackpole Electronics IncIn Stock: 818CB2JB2R00 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the WRF1JB2R00 is determined by the following critical parameters:

• Resistance Value: Must be 2 Ohms to maintain circuit function
• Tolerance: ±5% tolerance ensures compatibility with design specifications
• Composition: Wirewound construction required for safety and reliability characteristics
• Package Type: Axial package maintains mechanical and electrical compatibility with existing PCB layouts
• Power Rating: Minimum 1W; higher ratings (2W) are acceptable as they provide additional thermal margin
• Operating Temperature: Must support the required temperature range; extended ranges are acceptable
• Compliance: ROHS3 compliance and safety features must be maintained

Based on these criteria, the following substitute parts are identified:

Primary Substitute (Manufacturer Recommended): CB2JB2R00 — Direct resistance and tolerance match with upgraded power rating and extended temperature range.

Alternative Substitute: CB2JBR220 — Different resistance value (220 mOhms vs. 2 Ohms); not suitable for direct substitution in circuits requiring 2 Ohm resistance.

Parameter Comparison

Engineering Selection Recommendations

CB2JB2R00 is the recommended substitute for WRF1JB2R00 applications. This part maintains identical resistance and tolerance specifications while providing 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 (±200 ppm/°C vs. -80/+900 ppm/°C). The CB2JB2R00 is currently in active production status, ensuring long-term availability and supply chain reliability. Both components are ROHS3 compliant and maintain equivalent safety and environmental certifications.

CB2JBR220 is not suitable as a direct substitute due to its 220 mOhm resistance value, which differs significantly from the required 2 Ohm specification. This part should only be considered for applications with fundamentally different circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can CB2JB2R00 be used as a direct replacement for WRF1JB2R00?

A: Yes. CB2JB2R00 provides direct functional equivalence with identical 2 Ohm resistance and ±5% tolerance. The higher power rating and extended temperature range represent performance improvements compatible with the original design.

Q: What is the significance of the power rating difference (1W vs. 2W)?

A: The CB2JB2R00 2W rating provides additional thermal headroom compared to the 1W WRF1JB2R00. In applications where the original 1W resistor operated near its thermal limit, the 2W substitute reduces junction temperature and extends component life. No circuit redesign is required.

Q: Are the axial package dimensions compatible between WRF1JB2R00 and CB2JB2R00?

A: Both components use axial package construction. The CB2JB2R00 has slightly larger physical dimensions (0.252" Square x 0.709" L vs. 0.197" Dia x 0.433" L). Verify PCB layout clearances before implementation, particularly in space-constrained applications.

Q: Why is CB2JBR220 listed as a substitute if the resistance value is different?

A: CB2JBR220 is listed in the original part's substitute field but is not functionally equivalent due to its 220 mOhm resistance. This part is included for reference only and should not be used for applications requiring 2 Ohm resistance.

Q: Are compliance certifications maintained with the substitute part?

A: Yes. CB2JB2R00 maintains ROHS3 compliance, REACH unaffected status, and equivalent safety certifications (flame proof, moisture resistant, safety-rated) as the original WRF1JB2R00.