WRF2JB68R0 Equivalent & Substitute Parts

Part Overview

The WRF2JB68R0 is a 68 Ohm ±5% 2W 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 applications requiring reliable power dissipation in harsh environments. The part is currently obsolete, necessitating identification of functionally equivalent alternatives from active product lines that maintain electrical and mechanical compatibility.

Substiute Parts

WRF2JB68R0

Stackpole Electronics IncIn Stock: 1065WRF2JB68R0 Datasheet

Current PartRFQ

CB2JB68R0

Stackpole Electronics IncIn Stock: 685CB2JB68R0 Datasheet

DirectRFQ

CB3JBR910

Stackpole Electronics IncIn Stock: 767CB3JBR910 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WRF2JB68R0 are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Resistance value: 68 Ohms
• Tolerance: ±5%
• Power rating: 2W or higher
• Composition: Wirewound
• Package type: Axial
• Features: Flame Proof, Moisture Resistant, Safety
• RoHS compliance: ROHS3 Compliant

Substitution Logic: CB2JB68R0 qualifies as a direct substitute, matching all primary electrical parameters (68 Ohms, ±5%, 2W) and mechanical specifications (axial package). The part is from an active product line with enhanced operating temperature range (-55°C ~ 275°C) and improved temperature coefficient stability (±200ppm/°C vs. -80/+900ppm/°C).

CB3JBR910 is listed as a manufacturer-recommended alternative but does not meet the primary resistance requirement (910 mOhms vs. 68 Ohms) and represents a different functional application. This part is included for reference only and is not a direct electrical substitute.

Parameter Comparison

Engineering Selection Recommendations

CB2JB68R0 is the primary substitute for WRF2JB68R0. Both parts are ROHS3 compliant and maintain identical electrical specifications (68 Ohms, ±5%, 2W). CB2JB68R0 is sourced from an active product line, ensuring long-term availability and supply chain continuity. The enhanced operating temperature range (-55°C ~ 275°C) and improved temperature coefficient (±200ppm/°C) provide superior performance margins in thermal cycling applications. Axial package compatibility ensures direct mechanical substitution in existing PCB layouts.

CB3JBR910 does not qualify as an electrical substitute due to resistance value mismatch (910 mOhms vs. 68 Ohms). This part is included in the manufacturer's reference list but serves a different functional purpose and should not be selected for direct replacement applications.

Frequently Asked Questions (FAQ)

Q: Can CB2JB68R0 be used as a direct replacement for WRF2JB68R0?

A: Yes. CB2JB68R0 matches all critical electrical parameters (68 Ohms, ±5% tolerance, 2W power rating) and mechanical specifications (axial package). Both parts are wirewound, flame-proof, moisture-resistant, and ROHS3 compliant. The axial package geometry ensures compatibility with existing PCB footprints.

Q: What is the difference between WRF2JB68R0 and CB2JB68R0?

A: The primary differences are product status and thermal performance. WRF2JB68R0 is obsolete; CB2JB68R0 is active. CB2JB68R0 offers an extended operating temperature range (-55°C ~ 275°C vs. -55°C ~ 200°C) and tighter temperature coefficient specification (±200ppm/°C vs. -80/+900ppm/°C), providing improved stability across temperature extremes.

Q: Why is CB3JBR910 listed if it cannot replace WRF2JB68R0?

A: CB3JBR910 is included as a manufacturer-recommended reference part but has a different resistance value (910 mOhms). It is not suitable for applications requiring 68 Ohm resistance and should only be considered for circuits specifically designed for low-resistance, high-power applications.

Q: Are the physical dimensions compatible between WRF2JB68R0 and CB2JB68R0?

A: Both parts use axial package construction. WRF2JB68R0 dimensions are 0.197" Dia x 0.630" L (5.00mm x 16.00mm); CB2JB68R0 dimensions are 0.252" Square x 0.709" L (6.40mm x 18.00mm). While dimensions differ slightly, both fit standard axial component footprints. PCB layout verification is recommended for space-constrained applications.

Q: What compliance certifications apply to substitute parts?

A: Both CB2JB68R0 and CB3JBR910 are ROHS3 compliant and REACH unaffected, matching the compliance profile of WRF2JB68R0. All parts carry EAR99 export classification and HTSUS code 8533.21.0080.