HS100 120R F Equivalent & Substitute Parts

Part Overview

The HS100 120R F is a 120 Ohms ±1% 100W wirewound chassis mount resistor manufactured by Ohmite. This component is designed for applications requiring high power dissipation with precision resistance values and pulse withstanding capability. The part is currently in active production status with 731 units in stock. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits lower power ratings within application tolerances.

Substiute Parts

HS100 120R F

OhmiteIn Stock: 777HS100 120R F Datasheet

Current PartRFQ

HS75 120R F

ARCOLIn Stock: 963HS75 120R F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The HS75 120R F qualifies as a parametric equivalent based on the following matching criteria:

• Resistance value: 120 Ohms (identical)
• Tolerance: ±1% (identical)
• Composition: Wirewound (identical)
• Temperature Coefficient: ±100ppm/°C (equivalent)
• Housing Type: Aluminum (identical)
• Mounting Feature: Flanges (identical)
• Lead Style: Solder Lugs (identical)
• RoHS Compliance: Yes (identical)

The primary difference is the power rating: HS75 120R F is rated at 75W versus the 100W rating of the HS100 120R F. This substitute is applicable in designs where the actual power dissipation does not exceed 75W under worst-case operating conditions.

Parameter Comparison

Engineering Selection Recommendations

Both the HS100 120R F and HS75 120R F are active production components with RoHS compliance and unlimited moisture sensitivity level (MSL 1). Selection between these parts depends on application power dissipation requirements:

• Use HS100 120R F when the design requires full 100W power handling capability or when thermal margin is critical.
• Use HS75 120R F when actual power dissipation in the application is confirmed to remain below 75W and space constraints favor the smaller footprint (48.70mm x 27.30mm versus 65.20mm x 47.50mm).

Both components share identical electrical specifications (120 Ohms ±1%, wirewound construction, aluminum housing, flanged mounting, solder lug termination) and regulatory compliance status, ensuring functional interchangeability within power rating limits.

Frequently Asked Questions (FAQ)

Q: Can HS75 120R F replace HS100 120R F in all applications?

A: The HS75 120R F is electrically equivalent but has a lower power rating (75W vs. 100W). Substitution is valid only when the actual power dissipation in the circuit does not exceed 75W under maximum operating conditions. Exceeding this rating will cause component failure.

Q: What are the physical differences between these parts?

A: The HS75 120R F has a smaller footprint (48.70mm x 1.075" width versus 65.20mm x 47.50mm for the HS100 120R F). Both maintain the same seated height of 0.949" (24.10mm), so vertical clearance is identical. Horizontal space availability must be verified before substitution.

Q: Are both parts RoHS compliant?

A: Yes, both HS100 120R F and HS75 120R F are RoHS compliant with MSL 1 (unlimited moisture sensitivity), meeting regulatory requirements for restricted substance use.

Q: What is the temperature coefficient difference?

A: The HS100 120R F specifies 100ppm/°C while the HS75 120R F specifies ±100ppm/°C. Both values are equivalent for practical engineering purposes, indicating resistance change of approximately 0.01% per degree Celsius.

Q: Can I use HS100 120R F as a substitute for HS75 120R F?

A: Yes, the HS100 120R F can replace the HS75 120R F in any application. The higher power rating provides additional thermal margin and reliability. Physical space must accommodate the larger footprint (65.20mm x 47.50mm).