WNC250FET Equivalent & Substitute Parts

Part Overview

The WNC250FET is a 250 Ohms ±1% 2W through-hole resistor manufactured by Ohmite, featuring axial leads with non-inductive wirewound construction. This component is designed for applications requiring precision resistance with low inductance characteristics and operates across a temperature range of -55°C to 150°C. The part maintains Active product status and is ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter set.

Substiute Parts

WNC250FET

OhmiteIn Stock: 746WNC250FET Datasheet

Current PartRFQ

WHC250FET

OhmiteIn Stock: 2792WHC250FET Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The WHC250FET qualifies as a parametric equivalent to the WNC250FET based on the following matching criteria:

• Identical resistance value: 250 Ohms
• Identical tolerance: ±1%
• Identical power rating: 2W
• Identical composition: Wirewound
• Identical package type: Axial
• Identical temperature coefficient: ±20ppm/°C
• Identical operating temperature range: -55°C ~ 150°C
• Identical physical dimensions: 0.180" Dia x 0.449" L (4.57mm x 11.40mm)
• Identical RoHS compliance: ROHS3 Compliant
• Identical ECCN and HTSUS classifications

The primary distinction between these parts is packaging format: WNC250FET is supplied in Cut Tape (CT), while WHC250FET is supplied in Tape & Reel (TR). Both parts are manufactured by Ohmite and maintain Active product status.

Parameter Comparison

Engineering Selection Recommendations

Both WNC250FET and WHC250FET are suitable for direct substitution in applications requiring a 250 Ohm 2W axial wirewound resistor. Selection between these parts should be based on procurement and assembly requirements:

• WNC250FET (Cut Tape packaging) is appropriate for lower-volume applications or manual assembly processes.
• WHC250FET (Tape & Reel packaging) is optimized for high-volume automated assembly operations.

Both parts maintain identical electrical performance, mechanical compatibility, and regulatory compliance (ROHS3). The choice between them does not affect circuit functionality or performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can WHC250FET replace WNC250FET in my circuit?

A: Yes. Both parts are electrically and mechanically identical. The only difference is packaging format (Tape & Reel versus Cut Tape). Circuit performance and reliability are unaffected by this substitution.

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

A: Cut Tape (CT) packaging supplies individual components on tape segments, suitable for manual handling and small-quantity applications. Tape & Reel (TR) packaging supplies components on continuous reels, optimized for automated pick-and-place assembly equipment used in high-volume manufacturing.

Q: Are there any compliance or certification differences between these parts?

A: No. Both WNC250FET and WHC250FET carry identical ROHS3 compliance, ECCN (EAR99), and HTSUS classifications. Regulatory and environmental compliance is equivalent.

Q: Will substitution require PCB redesign?

A: No. Both parts share identical physical dimensions (0.180" Dia x 0.449" L) and axial package type. PCB footprints and assembly processes remain unchanged.

Q: Which part should I specify for new designs?

A: Selection depends on manufacturing volume and assembly capability. For automated assembly, specify WHC250FET. For manual assembly or low-volume production, either part is acceptable based on availability and procurement lead time.