WW3JB100R Equivalent & Substitute Parts

Part Overview

The WW3JB100R is a 100 Ohms ±5% 3W axial wirewound resistor manufactured by Stackpole Electronics Inc. This through-hole component features moisture-resistant construction and operates across a wide temperature range from -55°C to 350°C. The part is currently active in production with ROHS3 compliance and is suitable for applications requiring precision resistive elements in harsh environments. Substitute parts are identified when higher power ratings or alternative manufacturer sourcing is required while maintaining core electrical and mechanical compatibility.

Substiute Parts

WW3JB100R

Stackpole Electronics IncIn Stock: 1236WW3JB100R Datasheet

Current PartRFQ

WW5JT100R

Stackpole Electronics IncIn Stock: 1926WW5JT100R Datasheet

MFR RecommendedRFQ

45J100E

OhmiteIn Stock: 94545J100E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WW3JB100R are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Resistance value: 100 Ohms
• Tolerance: ±5%
• Temperature Coefficient: ±20ppm/°C
• Composition: Wirewound

Mechanical Parameters (Must Match):

• Package/Case: Axial
• Number of Terminations: 2
• Through-hole configuration

Allowable Variations:

• Power rating may be equal or higher (3W or greater)
• Manufacturer may differ
• Physical dimensions may vary within axial package constraints
• Packaging format (Bulk, Cut Tape) may differ

The identified substitutes WW5JT100R and 45J100E both meet these criteria with upgraded 5W power ratings, providing enhanced thermal capability while maintaining identical electrical specifications and axial form factor.

Parameter Comparison

Engineering Selection Recommendations

WW3JB100R (Original Part): Use when the 3W power rating is sufficient for the application and Stackpole sourcing is preferred. This part offers the smallest physical footprint among the three options.

WW5JT100R (Stackpole Substitute): Select this part when higher thermal dissipation capacity is required. The 5W rating provides additional margin while maintaining identical electrical characteristics and temperature range. Stackpole manufacturer continuity may simplify supply chain management. Cut Tape packaging is suitable for automated assembly processes.

45J100E (Ohmite Substitute): This Ohmicone® 40 series component provides 5W power rating with equivalent electrical specifications. Use when Ohmite sourcing is required or when Bulk packaging format is preferred. Note that operating temperature range is not specified in available documentation.

All three parts maintain ROHS3 compliance and are suitable for applications requiring moisture-resistant wirewound resistors in axial configuration.

Frequently Asked Questions (FAQ)

Q: Can WW5JT100R or 45J100E be used as direct replacements for WW3JB100R?

A: Yes, both substitute parts are electrically and mechanically compatible. They provide identical resistance, tolerance, and temperature coefficient values. The primary difference is the increased 5W power rating, which does not create incompatibility in circuits designed for 3W operation. Physical dimensions are larger due to the higher power rating, so PCB layout space must be verified.

Q: What is the significance of the power rating difference?

A: The power rating indicates maximum continuous power dissipation. A 5W-rated resistor can safely dissipate more heat than a 3W-rated resistor. Using a higher-rated component in a 3W application provides thermal margin and does not degrade performance. The reverse substitution (3W for 5W) is not acceptable.

Q: Are there packaging considerations when substituting?

A: Yes. WW3JB100R is supplied in Bulk packaging, WW5JT100R in Cut Tape (CT), and 45J100E in Bulk. Cut Tape format is optimized for pick-and-place assembly, while Bulk packaging is suitable for manual assembly or tape-and-reel conversion. Verify packaging compatibility with your assembly process.

Q: Do all three parts meet the same compliance standards?

A: All three parts are ROHS3 compliant and REACH unaffected. They share identical ECCN (EAR99) and HTSUS (8533.21.0080) classifications, ensuring consistent regulatory treatment across substitutions.

Q: What is the moisture-resistant feature in WW3JB100R and WW5JT100R?

A: Moisture-resistant construction protects the wirewound element from environmental moisture ingress. This feature is explicitly stated for WW3JB100R and WW5JT100R. The 45J100E specification does not document this feature, though Ohmicone® series components typically incorporate similar protection.