WRF2JB330R Equivalent & Substitute Parts

Part Overview

The WRF2JB330R is a 330 Ohm, 2W axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is classified as obsolete, necessitating identification of suitable alternatives for ongoing applications. The part features flame-proof and moisture-resistant construction with safety-rated wirewound composition, making it suitable for industrial and safety-critical applications requiring reliable performance across extended temperature ranges.

Substiute Parts

WRF2JB330R

Stackpole Electronics IncIn Stock: 1056WRF2JB330R Datasheet

Current PartRFQ

CB3JBR240

Stackpole Electronics IncIn Stock: 1079CB3JBR240 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the WRF2JB330R is constrained by the following critical parameters:

• Resistance Value: 330 Ohms (exact match required)
• Tolerance: ±5% (acceptable range for equivalent functionality)
• Power Rating: Minimum 2W (equal or greater)
• Composition: Wirewound (required for safety and thermal characteristics)
• Package Type: Axial (mechanical and electrical interface requirement)
• Features: Flame Proof and Moisture Resistant (safety and environmental protection)
• Compliance: ROHS3 Compliant, REACH Unaffected

The substitute part CB3JBR240 does not meet the resistance value requirement (240 mOhms vs. 330 Ohms) and therefore cannot function as an equivalent substitute for this application. No valid substitutes are available based on the provided parameters.

Parameter Comparison

Engineering Selection Recommendations

The WRF2JB330R is obsolete and requires replacement. However, the listed substitute CB3JBR240 presents a fundamental incompatibility: the resistance value differs by three orders of magnitude (330 Ohms versus 240 mOhms). This difference renders CB3JBR240 unsuitable for direct substitution in circuits designed for the WRF2JB330R.

Selection of an alternative component requires identification of a wirewound axial resistor with 330 Ohm resistance, ±5% tolerance, minimum 2W power rating, and equivalent safety features (flame proof, moisture resistant). Both parts maintain ROHS3 compliance and REACH compliance status, supporting regulatory requirements for new designs.

Frequently Asked Questions (FAQ)

Q: Can CB3JBR240 replace WRF2JB330R in my circuit?

A: No. The resistance values differ fundamentally (330 Ohms versus 240 mOhms). Direct substitution would alter circuit behavior and is not permissible.

Q: What makes a resistor a valid substitute for WRF2JB330R?

A: A valid substitute must match the following parameters: 330 Ohm resistance value, ±5% tolerance, minimum 2W power rating, wirewound composition, axial package type, and flame-proof/moisture-resistant features.

Q: Why is the WRF2JB330R obsolete?

A: Product status is determined by the manufacturer. Obsolete components are no longer manufactured and require replacement with active alternatives.

Q: Are there mechanical compatibility concerns between axial resistors?

A: Axial package type ensures mechanical compatibility for through-hole mounting. Physical dimensions may vary; verify mounting clearance in your specific application.

Q: Does higher power rating affect circuit performance?

A: A substitute with higher power rating (3W versus 2W) maintains electrical equivalence while providing additional thermal margin. This does not negatively impact circuit function.