WNAR25FET Equivalent & Substitute Parts

Part Overview

The WNAR25FET is a 250 mOhms ±1% 0.5W through-hole axial wirewound resistor manufactured by Ohmite, part of the WN series. This component is designed for applications requiring low-resistance, precision current sensing and power dissipation in compact form factors. The part maintains Active product status with full RoHS3 compliance and REACH unaffected certification. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter set.

Substiute Parts

WNAR25FET

OhmiteIn Stock: 999WNAR25FET Datasheet

Current PartRFQ

WHAR25FET

OhmiteIn Stock: 3437WHAR25FET Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WNAR25FET are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Resistance value: 250 mOhms
• Tolerance: ±1%
• Power rating: 0.5W (1/2W)
• Composition: Wirewound
• Temperature coefficient: ±90ppm/°C
• Operating temperature range: -55°C to 150°C

Mechanical Parameters (Must Match):

• Package type: Axial
• Physical dimensions: 0.100" Dia x 0.200" L (2.54mm x 5.08mm)
• Number of terminations: 2

Compliance Parameters (Must Match):

• RoHS3 Compliant
• REACH Unaffected

The WHAR25FET qualifies as a parametric equivalent substitute. Both parts share identical electrical specifications, mechanical dimensions, and compliance certifications. The primary difference is packaging format: WNAR25FET is supplied in Tape & Reel (TR) format, while WHAR25FET is supplied in Cut Tape (CT) format.

Parameter Comparison

Engineering Selection Recommendations

Both WNAR25FET and WHAR25FET maintain Active product status and are fully compliant with RoHS3 and REACH requirements. Selection between these parts is determined by supply chain and assembly process requirements rather than electrical or mechanical performance:

• WNAR25FET (Tape & Reel): Suitable for high-volume automated assembly operations requiring continuous reel feeding.
• WHAR25FET (Cut Tape): Suitable for lower-volume production, manual assembly, or applications where individual component handling is preferred.

Both parts deliver identical electrical performance and mechanical fit within the specified operating parameters.

Frequently Asked Questions (FAQ)

Q: Can WHAR25FET replace WNAR25FET in my circuit?

A: Yes. Both parts are electrically and mechanically identical. The WHAR25FET provides the same 250 mOhms resistance, ±1% tolerance, 0.5W power rating, and operating temperature range. Substitution is valid for all circuit applications.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on continuous reels for automated pick-and-place assembly. Cut Tape (CT) packaging supplies components on tape segments, typically used for manual assembly or lower-volume production runs. Electrical and mechanical specifications remain identical.

Q: Are both parts RoHS3 compliant?

A: Yes. Both WNAR25FET and WHAR25FET are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: Do these parts have identical physical dimensions?

A: Yes. Both parts measure 0.100" diameter by 0.200" length (2.54mm x 5.08mm) and feature identical axial package geometry with 2 terminations.

Q: What is the temperature coefficient specification?

A: Both parts specify ±90ppm/°C temperature coefficient across the -55°C to 150°C operating range, ensuring stable resistance performance across temperature variations.