WRF2JB18R0 Equivalent & Substitute Parts

Part Overview

The WRF2JB18R0 is an 18 Ohm, 2W axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is designed for through-hole applications requiring flame-proof and moisture-resistant characteristics with safety-rated construction. The part is currently listed as obsolete, making identification of compatible substitute components essential for ongoing design support and production continuity.

Substiute Parts

WRF2JB18R0

Stackpole Electronics IncIn Stock: 1216WRF2JB18R0 Datasheet

Current PartRFQ

CB2JB18R0

Stackpole Electronics IncIn Stock: 1201CB2JB18R0 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WRF2JB18R0 is based on strict equivalence of the following electrical and mechanical parameters:

• Resistance value: 18 Ohms
• Tolerance: ±5%
• Power rating: 2W
• Composition: Wirewound
• Package configuration: Axial through-hole
• Safety and environmental features: Flame proof, moisture resistant, safety-rated construction
• Compliance certifications: ROHS3 compliant, REACH unaffected

The CB2JB18R0 qualifies as a direct substitute based on matching all critical electrical specifications and maintaining equivalent safety and environmental certifications.

Parameter Comparison

Engineering Selection Recommendations

The CB2JB18R0 is the direct substitute for the obsolete WRF2JB18R0. Both components are manufactured by Stackpole Electronics Inc and maintain identical electrical specifications and safety certifications. The CB2JB18R0 is currently in active production status, ensuring availability for new designs and production requirements.

The CB2JB18R0 provides additional operational advantages including an extended operating temperature range (-55°C ~ 275°C versus -55°C ~ 200°C) and a tighter temperature coefficient (±200ppm/°C versus -80/+900ppm/°C), making it suitable for applications with more stringent thermal stability requirements.

Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Can the CB2JB18R0 be used as a direct replacement for the WRF2JB18R0?

A: Yes. Both components share identical resistance values, tolerance, power rating, composition, and axial package configuration. All safety and environmental features are equivalent, and both maintain ROHS3 compliance.

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

A: The WRF2JB18R0 measures 0.197" diameter × 0.630" length (5.00mm × 16.00mm). The CB2JB18R0 measures 0.252" square × 0.709" length (6.40mm × 18.00mm). Both are axial through-hole components; verify PCB layout compatibility before substitution.

Q: Why does the CB2JB18R0 have a different temperature coefficient?

A: The CB2JB18R0 features a tighter temperature coefficient specification (±200ppm/°C) compared to the WRF2JB18R0 (-80/+900ppm/°C). This represents improved thermal stability in the active production series and does not affect substitution compatibility.

Q: Is the extended operating temperature range of the CB2JB18R0 a concern?

A: No. The CB2JB18R0 supports operation from -55°C to 275°C, which encompasses the original WRF2JB18R0 range of -55°C to 200°C. This extended capability provides additional design flexibility without compromising compatibility.

Q: What is the availability status of these components?

A: The WRF2JB18R0 is obsolete. The CB2JB18R0 is in active production with current inventory available, making it the recommended choice for new procurement and production planning.