WLAR100FE Equivalent & Substitute Parts

Part Overview

The WLAR100FE is a 100 mOhms ±1% 0.5W wirewound axial resistor manufactured by Ohmite, designed for current sense applications requiring moisture resistance. This Active product is specified as a through-hole component with axial termination. Substitute parts are identified to provide equivalent electrical and mechanical performance for applications where the original packaging or inventory availability requires alternative sourcing.

Substiute Parts

WLAR100FE

OhmiteIn Stock: 1142WLAR100FE Datasheet

Current PartRFQ

WLAR100FET

OhmiteIn Stock: 3596WLAR100FET Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WLAR100FE is determined by strict equivalence across the following critical parameters:

• Resistance value: 100 mOhms
• Tolerance: ±1%
• Power rating: 0.5W (1/2W)
• Composition: Wirewound
• Package/Case: Axial
• Temperature coefficient: ±100 ppm/°C
• Features: Current Sense, Moisture Resistant
• Physical dimensions: 0.100" Dia x 0.200" L (2.54mm x 5.08mm)
• Termination count: 2
• RoHS compliance: ROHS3 Compliant

The WLAR100FET is classified as a direct substitute, differing only in packaging format (Cut Tape vs. standard packaging), which does not affect electrical or mechanical performance in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

Both WLAR100FE and WLAR100FET are Active products manufactured by Ohmite with identical electrical specifications and physical dimensions. Selection between these parts is determined by packaging and procurement requirements:

• WLAR100FE: Standard packaging format, 1045 units in stock
• WLAR100FET: Cut Tape (CT) packaging format, 3557 units in stock

Both parts maintain ROHS3 compliance and are suitable for current sense applications requiring moisture-resistant wirewound construction. The choice between these substitutes depends on assembly process compatibility and inventory availability rather than electrical performance.

Frequently Asked Questions (FAQ)

Q: Can WLAR100FET be used as a direct replacement for WLAR100FE?

A: Yes. Both parts are electrically and mechanically identical, with the only difference being the packaging format (Cut Tape vs. standard packaging). This difference does not affect circuit performance or PCB assembly compatibility.

Q: What is the significance of the packaging difference between these parts?

A: The packaging format (standard vs. Cut Tape) affects handling and assembly logistics but does not impact electrical characteristics, physical dimensions, or thermal performance. Selection depends on your assembly equipment and procurement workflow.

Q: Are both parts RoHS compliant?

A: Yes. Both WLAR100FE and WLAR100FET are ROHS3 compliant and suitable for applications requiring regulatory compliance.

Q: What applications are these resistors designed for?

A: These wirewound axial resistors are specified for current sense applications where precision (±1% tolerance), low resistance values (100 mOhms), and moisture resistance are required.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. The identical physical dimensions (0.100" Dia x 0.200" L) and axial package type ensure mechanical and electrical interchangeability in through-hole PCB designs.