WRF2JB1R00 Equivalent & Substitute Parts

Part Overview

The WRF2JB1R00 is a 1 Ohm, 2W axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design support and procurement. The part features flame-proof and moisture-resistant construction suitable for industrial and safety-critical applications. Substitute parts must maintain identical electrical specifications and mechanical compatibility to ensure direct replacement in existing designs.

Substiute Parts

WRF2JB1R00

Stackpole Electronics IncIn Stock: 704WRF2JB1R00 Datasheet

Current PartRFQ

CB2JB1R00

Stackpole Electronics IncIn Stock: 829CB2JB1R00 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WRF2JB1R00 is based on the following critical parameters that must remain constant:

• Resistance value: 1 Ohm
• Tolerance: ±5%
• Power rating: 2W
• Composition: Wirewound
• Package configuration: Axial through-hole
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The CB2JB1R00 qualifies as a direct substitute based on matching all mandatory electrical and mechanical parameters. While dimensional variations and extended temperature range exist, these do not preclude functional equivalence in applications designed for the WRF2JB1R00 specifications.

Parameter Comparison

Engineering Selection Recommendations

The CB2JB1R00 is the primary substitute for the obsolete WRF2JB1R00. Both parts are manufactured by Stackpole Electronics Inc and maintain identical electrical specifications: 1 Ohm resistance, ±5% tolerance, and 2W power rating. Both components are ROHS3 compliant and REACH unaffected, satisfying regulatory requirements for current procurement.

The CB2JB1R00 offers an extended operating temperature range (-55°C ~ 275°C versus -55°C ~ 200°C) and improved temperature coefficient stability (±200ppm/°C versus -80/+900ppm/°C), providing enhanced performance margins in temperature-sensitive applications. The active product status of CB2JB1R00 ensures long-term availability and supply chain continuity.

Physical dimensions differ slightly between the two parts. The CB2JB1R00 measures 0.252" Square x 0.709" L (6.40mm x 18.00mm), compared to the WRF2JB1R00 at 0.197" Dia x 0.630" L (5.00mm x 16.00mm). PCB layout verification is necessary to confirm mechanical fit within existing designs.

Frequently Asked Questions (FAQ)

Q: Can CB2JB1R00 be used as a direct replacement for WRF2JB1R00 in all applications?

A: Yes, from an electrical standpoint. Both parts share identical resistance, tolerance, power rating, and composition specifications. However, physical dimensions differ, requiring verification that the larger CB2JB1R00 package fits within the PCB layout constraints of designs originally specified for WRF2JB1R00.

Q: What is the significance of the different temperature coefficients?

A: The CB2JB1R00 exhibits superior temperature stability (±200ppm/°C) compared to the WRF2JB1R00 (-80/+900ppm/°C). This means the CB2JB1R00 maintains more consistent resistance values across temperature variations, beneficial for precision applications. The WRF2JB1R00's wider coefficient range indicates greater resistance drift with temperature changes.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both WRF2JB1R00 and CB2JB1R00 are ROHS3 compliant and REACH unaffected, meeting current environmental and hazardous substance regulations.

Q: Why is the WRF2JB1R00 listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The CB2JB1R00 represents the active equivalent from the same manufacturer, ensuring continued availability and support for this component specification.

Q: What packaging options are available?

A: The WRF2JB1R00 was supplied in standard packaging. The CB2JB1R00 is available in bulk packaging, which may affect procurement quantities and lead times depending on supplier inventory practices.