WW3JB33R0 Equivalent & Substitute Parts

Part Overview

The WW3JB33R0 is a 33 Ohm, 3W wirewound axial resistor manufactured by Stackpole Electronics Inc. This through-hole component is designed for applications requiring moisture-resistant performance across a wide operating temperature range of -55°C to 350°C. The part maintains Active product status with 933 units currently in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to inventory constraints, application redesigns, or supply chain considerations.

Substiute Parts

WW3JB33R0

Stackpole Electronics IncIn Stock: 971WW3JB33R0 Datasheet

Current PartRFQ

45J33RE

OhmiteIn Stock: 106245J33RE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The WW3JB33R0 has one identified substitute: the 45J33RE manufactured by Ohmite. Substitution eligibility is determined by the following critical parameters:

• Resistance value: Both parts are 33 Ohms
• Tolerance: Both parts maintain ±5% tolerance
• Composition: Both are wirewound construction
• Package: Both use axial through-hole configuration
• Temperature Coefficient: Both specify ±20ppm/°C
• Compliance: Both are ROHS3 Compliant and EAR99 classified

The 45J33RE differs in power rating (5W versus 3W) and physical dimensions. The higher power rating of the substitute part does not prevent substitution in applications designed for the 3W specification, as the substitute can safely operate at or below the original power requirement.

Parameter Comparison

Engineering Selection Recommendations

Both the WW3JB33R0 and 45J33RE meet identical electrical specifications for resistance value, tolerance, and temperature coefficient. Both components are ROHS3 Compliant and classified under the same HTSUS code, confirming regulatory equivalence.

The primary consideration for component selection is physical footprint. The 45J33RE occupies a larger board space due to its increased diameter (0.343" versus 0.187") and length (0.937" versus 0.560"). PCB layout constraints must be evaluated before substitution. The 5W power rating of the 45J33RE provides additional thermal margin in applications operating at or below 3W dissipation levels.

Both parts are Active status with confirmed inventory availability, supporting either selection for new designs or replacement applications.

Frequently Asked Questions (FAQ)

Q: Can the 45J33RE (5W) replace the WW3JB33R0 (3W) in existing designs?

A: Electrical substitution is valid. The 45J33RE maintains identical resistance, tolerance, and temperature coefficient specifications. Physical board space must be verified, as the substitute part is larger in both diameter and length.

Q: Are there operating temperature differences between these parts?

A: The WW3JB33R0 specifies an operating range of -55°C to 350°C. The 45J33RE does not provide an operating temperature range in the available data. Both parts specify identical temperature coefficient values of ±20ppm/°C.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the WW3JB33R0 and 45J33RE are ROHS3 Compliant, REACH Unaffected, and classified as EAR99 for export control purposes.

Q: What is the primary difference between these axial resistors?

A: The WW3JB33R0 is rated for 3W power dissipation with a compact form factor. The 45J33RE is rated for 5W with a larger physical package. Electrical performance is equivalent for applications requiring 3W or less.

Q: Are both parts suitable for moisture-sensitive applications?

A: The WW3JB33R0 is specified as Moisture Resistant. The 45J33RE does not list moisture resistance as a feature in the available specifications. Application requirements for moisture protection should be evaluated independently.