WHA25RFET Equivalent & Substitute Parts

Part Overview

The WHA25RFET is a 25 Ohm, ±1% tolerance, 0.5W through-hole axial wirewound resistor manufactured by Ohmite. This component is classified as Active product status and is designed for applications requiring precision resistance with wirewound construction. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter set for this resistor category.

Substiute Parts

WHA25RFET

OhmiteIn Stock: 865WHA25RFET Datasheet

Current PartRFQ

WNA25RFET

OhmiteIn Stock: 6842WNA25RFET Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the WHA25RFET is determined by matching the following critical parameters:

• Resistance value: 25 Ohms
• Tolerance: ±1%
• Power rating: 0.5W (1/2W)
• Composition: Wirewound
• Package/Case: Axial
• Temperature coefficient: ±20ppm/°C
• Operating temperature range: -55°C to 150°C
• Physical dimensions: 0.100" Dia x 0.200" L (2.54mm x 5.08mm)
• Compliance: ROHS3 Compliant

The WNA25RFET qualifies as a parametric equivalent because it maintains all critical electrical and mechanical specifications. The primary distinction is the addition of non-inductive construction in the WNA25RFET series, which does not alter the core substitution criteria but provides enhanced performance characteristics for specific applications.

Parameter Comparison

Engineering Selection Recommendations

Both WHA25RFET and WNA25RFET are Active status components manufactured by Ohmite and maintain full ROHS3 compliance. Selection between these parts is based on application requirements and inventory availability. The WNA25RFET non-inductive construction may be preferred in applications sensitive to inductive effects, while the WHA25RFET standard wirewound construction serves general-purpose applications. Both parts meet the specified electrical and mechanical requirements for direct substitution in 25 Ohm, ±1%, 0.5W axial resistor applications.

Frequently Asked Questions (FAQ)

Q: Can WNA25RFET replace WHA25RFET in any application?

A: Yes, the WNA25RFET meets all critical electrical and mechanical parameters of the WHA25RFET. The non-inductive feature of the WNA25RFET does not compromise compatibility; it provides additional performance characteristics suitable for RF and high-frequency applications.

Q: Are the physical dimensions identical between these parts?

A: Yes, both parts share identical dimensions of 0.100" Dia x 0.200" L (2.54mm x 5.08mm), ensuring mechanical compatibility in PCB layouts and through-hole applications.

Q: Do both parts comply with environmental and regulatory standards?

A: Yes, both WHA25RFET and WNA25RFET are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: What is the temperature operating range for these resistors?

A: Both parts operate across -55°C to 150°C with a temperature coefficient of ±20ppm/°C, providing stable performance across industrial and extended temperature applications.

Q: Are there packaging differences between these substitute parts?

A: No, both parts are supplied in Cut Tape (CT) packaging with identical axial package specifications, ensuring compatibility with standard component handling and assembly processes.