WRF3JB33R0 Equivalent & Substitute Parts

Part Overview

The WRF3JB33R0 is a 33 Ohm, 5%, 3W axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is classified as obsolete, necessitating identification of equivalent alternatives for ongoing design support and procurement. The part features flame-proof and moisture-resistant construction suitable for through-hole applications requiring higher power dissipation in compact axial packaging.

Substiute Parts

WRF3JB33R0

Stackpole Electronics IncIn Stock: 961WRF3JB33R0 Datasheet

Current PartRFQ

CB2JB1R00

Stackpole Electronics IncIn Stock: 829CB2JB1R00 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the WRF3JB33R0 is constrained by the following critical parameters:

Resistance Value: The substitute must maintain 33 Ohms nominal resistance to preserve circuit function.

Tolerance: ±5% tolerance is required for circuit performance specifications.

Power Rating: The substitute must support minimum 3W power dissipation. Higher power ratings are acceptable; lower ratings are not.

Package Type: Axial through-hole configuration is mandatory for mechanical and electrical compatibility.

Composition: Wirewound construction is specified for this application.

Environmental Compliance: RoHS3 compliance and REACH unaffected status are required.

The substitute part CB2JB1R00 does not meet the resistance value requirement (1 Ohm vs. 33 Ohm) and therefore cannot function as a direct equivalent for this application.

Parameter Comparison

Engineering Selection Recommendations

No direct equivalent substitute is available from the provided substitute list. The CB2JB1R00 differs in two critical parameters: resistance value (1 Ohm vs. 33 Ohm) and power rating (2W vs. 3W). These differences render it unsuitable for direct substitution in circuits designed for the WRF3JB33R0.

For applications requiring a 33 Ohm, 3W axial wirewound resistor, alternative sources must be consulted. Both the main part and the listed substitute maintain ROHS3 compliance and REACH unaffected status, meeting current environmental regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can CB2JB1R00 replace WRF3JB33R0 in my circuit?

A: No. The CB2JB1R00 has a resistance value of 1 Ohm and 2W power rating, whereas the WRF3JB33R0 is specified at 33 Ohms and 3W. These differences make it unsuitable for direct substitution.

Q: What are the critical parameters for finding a true equivalent?

A: A true equivalent must match: 33 Ohm resistance, ±5% tolerance, minimum 3W power rating, axial through-hole package, wirewound composition, and ROHS3 compliance.

Q: Are there physical dimension constraints for substitution?

A: Yes. The WRF3JB33R0 measures 0.197" diameter × 0.630" length. Any substitute must fit within the same or smaller envelope to ensure mechanical compatibility in existing PCB layouts.

Q: Does the operating temperature range affect substitution?

A: The WRF3JB33R0 operates from -55°C to 225°C. A substitute with a wider or equal temperature range is acceptable, provided all other electrical parameters match.