WW3JT100R Equivalent & Substitute Parts

Part Overview

The WW3JT100R is a 100 Ohms ±5% 3W through-hole axial wirewound resistor manufactured by Stackpole Electronics Inc. This component is designed for applications requiring moisture-resistant wirewound construction with stable performance across extended temperature ranges. The part maintains Active product status with 986 units currently in stock. Substitute parts become necessary when design requirements call for increased power dissipation capacity, alternative packaging formats, or when primary inventory availability is constrained.

Substiute Parts

WW3JT100R

Stackpole Electronics IncIn Stock: 1034WW3JT100R 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

Substitution eligibility for the WW3JT100R is determined by the following critical parameters: resistance value (100 Ohms), tolerance (±5%), composition (wirewound), package type (axial), temperature coefficient (±20ppm/°C), and regulatory compliance (ROHS3). The identified substitute parts maintain these core electrical and mechanical specifications while offering variations in power rating and packaging format.

WW5JT100R qualifies as a direct substitute with identical electrical characteristics and enhanced power capacity (5W versus 3W), maintaining the same manufacturer series, moisture-resistant construction, and operating temperature range. The 45J100E from Ohmite meets all critical electrical parameters and regulatory requirements, with equivalent power rating (5W) and axial package configuration, though from an alternative manufacturer within the Ohmicone® 40 series.

Parameter Comparison

Engineering Selection Recommendations

All three components maintain ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements for electronic component applications. WW5JT100R represents the primary substitute option within the Stackpole WW series, offering increased power dissipation capacity while preserving moisture-resistant construction and identical temperature coefficient specifications. The 45J100E provides an alternative from Ohmite with equivalent electrical performance and power rating, suitable for applications where multi-source component qualification is required.

Selection between WW3JT100R and its substitutes depends on circuit power dissipation requirements and packaging logistics. The 3W rating of the primary part accommodates lower-power applications, while 5W-rated substitutes provide thermal margin for higher-dissipation circuits. Packaging format differences (Tape & Reel, Cut Tape, Bulk) influence procurement and assembly processes but do not affect electrical performance.

Frequently Asked Questions (FAQ)

Can WW5JT100R replace WW3JT100R in existing designs?

Yes. WW5JT100R maintains identical resistance, tolerance, temperature coefficient, and operating temperature range specifications. The increased 5W power rating provides additional thermal capacity without altering electrical behavior. Physical dimensions differ slightly due to the higher power rating, requiring verification of board layout clearance.

What are the dimensional differences between substitute parts?

WW3JT100R measures 0.187" diameter by 0.560" length. WW5JT100R increases to 0.312" diameter by 0.875" length. The 45J100E measures 0.343" diameter by 0.937" length. These variations reflect power rating differences in wirewound axial construction and must be considered during PCB layout design.

Are all substitute parts moisture resistant?

WW3JT100R and WW5JT100R both feature moisture-resistant construction. The 45J100E specification does not explicitly list moisture resistance as a feature. Applications requiring moisture-resistant performance should prioritize Stackpole components.

Do packaging format differences affect electrical performance?

No. Tape & Reel, Cut Tape, and Bulk packaging formats are logistics and assembly considerations only. Electrical characteristics remain identical across all three parts.

Which substitute offers the best inventory availability?

WW5JT100R currently maintains the highest inventory level at 1900 units, compared to 986 units for WW3JT100R and 905 units for 45J100E.