NHS50 180R F Equivalent & Substitute Parts

Part Overview

The NHS50 180R F is a 50-watt wirewound chassis mount resistor manufactured by Ohmite, part of the ARCOL HS series. This component is rated at 180 ohms with ±1% tolerance and features aluminum housing with flanged mounting. The part is currently active in production with 712 units in stock.

Equivalent and substitute parts are identified when applications require alternative configurations while maintaining the same electrical specifications (resistance value and tolerance) and mechanical compatibility (mounting style, housing type, and lead configuration). Substitutes may differ in power rating, physical dimensions, or packaging format based on specific application requirements.

Substiute Parts

NHS50 180R F

OhmiteIn Stock: 774NHS50 180R F Datasheet

Current PartRFQ

HS25 180R F

ARCOLIn Stock: 991HS25 180R F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the NHS50 180R F is determined by the following critical parameters:

Electrical Equivalence Requirements:

• Resistance value: 180 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Temperature coefficient: ±100ppm/°C (exact match required)
• Composition: Wirewound (exact match required)

Mechanical Compatibility Requirements:

• Housing type: Aluminum (exact match required)
• Mounting feature: Flanges (exact match required)
• Lead style: Solder Lugs (exact match required)

Acceptable Variation Parameters:

• Power rating: May be lower if application power dissipation permits
• Physical dimensions: May vary within mounting envelope constraints
• Packaging format: May differ (Bulk vs. Box)

The identified substitute HS25 180R F meets all electrical equivalence and mechanical compatibility requirements. The primary difference is the reduced power rating (25W versus 50W), which restricts its use to applications with lower power dissipation requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (NHS50 180R F): Select the NHS50 180R F for applications requiring 50-watt power dissipation at 180 ohms. This part is ROHS3 compliant and maintains active production status. The non-inductive feature and pulse withstanding capability support high-reliability circuit applications.

Substitute Part Selection (HS25 180R F): The HS25 180R F is electrically and mechanically equivalent to the NHS50 180R F for applications with power dissipation not exceeding 25 watts. Both parts are ROHS3 compliant and active in production. The HS25 180R F features a more compact axial length (27.30mm versus 49.10mm) while maintaining identical width and height dimensions. This substitute is suitable for space-constrained designs operating within the 25-watt thermal envelope.

Both parts are compliant with ROHS3 and EAR99 export classification standards. Selection between these parts depends solely on the application's power dissipation requirement and available mounting space.

Frequently Asked Questions (FAQ)

Q: Can the HS25 180R F replace the NHS50 180R F in any application?

A: The HS25 180R F is electrically and mechanically compatible with the NHS50 180R F only in applications where power dissipation does not exceed 25 watts. Exceeding this power rating will cause thermal failure of the substitute part.

Q: What are the physical differences between these parts?

A: The primary dimensional difference is length. The NHS50 180R F measures 1.933 inches (49.10mm) in length, while the HS25 180R F measures 1.075 inches (27.30mm). Width and height dimensions are identical at 1.102 inches (28.00mm) and 0.583 inches (14.80mm) respectively. Both parts use identical flanged mounting and solder lug lead configuration.

Q: Are both parts RoHS compliant?

A: Both the NHS50 180R F and HS25 180R F are ROHS3 compliant. Both parts are also classified as EAR99 for export purposes.

Q: What is the tolerance specification for both parts?

A: Both parts are rated at ±1% tolerance on the 180-ohm resistance value, ensuring equivalent accuracy in circuit applications.

Q: Do both parts have the same temperature coefficient?

A: Both parts feature an identical temperature coefficient of ±100ppm/°C, ensuring equivalent thermal stability across the operating temperature range.

Q: What is the difference in packaging between these parts?

A: The NHS50 180R F is supplied in Bulk packaging, while the HS25 180R F is supplied in Box packaging. This difference does not affect electrical or mechanical compatibility.