WHC75RFET Equivalent & Substitute Parts

Part Overview

The WHC75RFET is a 75 Ohm, 1% tolerance, 2W axial wirewound through-hole resistor manufactured by Ohmite. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across a temperature range of -55°C to 150°C and meets ROHS3 compliance requirements.

Substiute Parts

WHC75RFET

OhmiteIn Stock: 774WHC75RFET Datasheet

Current PartRFQ

WHC75RFE

OhmiteIn Stock: 979WHC75RFE Datasheet

DirectRFQ

WNC75RFET

OhmiteIn Stock: 690WNC75RFET Datasheet

Parametric EquivalentRFQ

ALSR0375R00FE12

Vishay DaleIn Stock: 1192ALSR0375R00FE12 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the WHC75RFET are grouped based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

• Resistance value: 75 Ohms
• Tolerance: ±1%
• Composition: Wirewound
• Package: Axial through-hole
• Number of terminations: 2

Grouping Logic:

Direct Manufacturer Equivalent (WHC75RFE): Identical electrical specifications and physical dimensions. Differs only in product status (Active vs. Obsolete) and packaging format. Provides direct functional replacement.

Parametric Equivalent (WNC75RFET): Meets all primary substitution criteria with identical resistance, tolerance, power rating, temperature coefficient, and physical dimensions. Introduces non-inductive construction as an additional feature. Packaging differs (Cut Tape vs. standard).

MFR Recommended Substitute (ALSR0375R00FE12): Meets core electrical requirements (75 Ohms, ±1% tolerance, wirewound, axial) but introduces variations in power rating (3W vs. 2W), temperature coefficient (±30ppm/°C vs. ±20ppm/°C), operating temperature range (-65°C to 250°C vs. -55°C to 150°C), and physical dimensions (0.500" L vs. 0.449" L). Includes moisture-resistant feature and higher power capability.

Parameter Comparison

Engineering Selection Recommendations

WHC75RFE (Direct Equivalent): This part is the primary replacement for WHC75RFET. It maintains identical electrical and mechanical specifications while offering active product status and improved availability. Selection of WHC75RFE eliminates obsolescence risk without requiring circuit redesign or re-qualification.

WNC75RFET (Parametric Equivalent): This part satisfies all core electrical requirements and maintains identical physical dimensions. The non-inductive construction feature may provide performance benefits in high-frequency applications. Product status is active with confirmed inventory availability. Packaging format (Cut Tape) differs from the main part.

ALSR0375R00FE12 (MFR Recommended Substitute): This part introduces design trade-offs. The increased power rating (3W vs. 2W) and extended operating temperature range (-65°C to 250°C) provide enhanced thermal margin and environmental capability. The higher temperature coefficient (±30ppm/°C) and increased physical length (0.500" vs. 0.449") require circuit layout verification. This option is suitable for applications requiring higher power dissipation or extended temperature operation. ROHS3 compliance is confirmed; REACH status is vendor-undefined.

All substitute parts maintain ROHS3 compliance and axial through-hole package compatibility with standard PCB footprints.

Frequently Asked Questions (FAQ)

Q: Can WHC75RFE be used as a direct replacement for WHC75RFET?

A: Yes. WHC75RFE provides direct functional equivalence with identical resistance (75 Ohms), tolerance (±1%), power rating (2W), temperature coefficient (±20ppm/°C), operating temperature range (-55°C to 150°C), and physical dimensions (0.180" Dia x 0.449" L). The only difference is product status (Active vs. Obsolete).

Q: What is the difference between WNC75RFET and WHC75RFET?

A: WNC75RFET matches all electrical specifications and physical dimensions of WHC75RFET. The primary difference is the non-inductive construction feature in WNC75RFET. Both parts are 75 Ohm, ±1% tolerance, 2W wirewound axial resistors with identical temperature coefficients and operating ranges. Packaging format differs (Cut Tape vs. standard).

Q: Can ALSR0375R00FE12 replace WHC75RFET in all applications?

A: ALSR0375R00FE12 meets the core electrical requirements (75 Ohms, ±1% tolerance, wirewound, axial) but introduces parametric differences. The 3W power rating exceeds the 2W requirement, and the extended operating temperature range (-65°C to 250°C) exceeds the original -55°C to 150°C specification. The temperature coefficient is ±30ppm/°C versus ±20ppm/°C, and the physical length is 0.500" versus 0.449". Substitution is valid for applications where these variations are acceptable or beneficial.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. WHC75RFE, WNC75RFET, and ALSR0375R00FE12 are all ROHS3 compliant. This ensures compatibility with regulatory requirements for electronic components.

Q: What packaging formats are available for these substitute parts?

A: WHC75RFE is available in standard packaging. WNC75RFET is supplied in Cut Tape (CT) format. ALSR0375R00FE12 is supplied in Bulk packaging. All parts maintain the same axial through-hole package type suitable for standard PCB assembly.

Q: Which substitute part should be selected for new designs?

A: For new designs requiring 75 Ohm, 2W, ±1% tolerance wirewound axial resistors, WHC75RFE or WNC75RFET are recommended due to active product status and exact specification match. ALSR0375R00FE12 is suitable if higher power dissipation capability or extended temperature operation is required.