Equivalent & Substitute Parts for HS50 1R F Wirewound Chassis Mount Resistor

Part Overview

The HS50 1R F is a 1 Ohm ±1% 50W wirewound chassis mount resistor manufactured by Ohmite, part of the ARCOL HS series. This component is designed for high-power applications requiring precision resistance with aluminum housing and flanged mounting. The part maintains Active product status with 1076 units in current inventory. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within the specified parameter constraints.

Substiute Parts

HS50 1R F

OhmiteIn Stock: 1107HS50 1R F Datasheet

Current PartRFQ

HS25 1R F

ARCOLIn Stock: 1075HS25 1R F Datasheet

Parametric EquivalentRFQ

NHS50 1R F

OhmiteIn Stock: 891NHS50 1R F Datasheet

Parametric EquivalentRFQ

HS25 1R F

ARCOLIn Stock: 1075HS25 1R F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HS50 1R F is determined by strict equivalence across the following critical parameters: resistance value (1 Ohm), tolerance (±1%), composition (wirewound), housing type (aluminum), mounting feature (flanges), lead style (solder lugs), and package configuration (axial, box). The power rating may vary within the substitute group, provided the substitute meets or exceeds the thermal and electrical requirements of the application.

Two substitute parts are identified:

NHS50 1R F (Ohmite): Maintains identical electrical specifications (1 Ohm ±1%, 50W) and mechanical configuration. Differs in physical dimensions (1.933" L x 1.102" W versus 1.933" L x 0.559" W) and includes additional features (non-inductive, pulse withstanding).

HS25 1R F (ARCOL): Maintains identical electrical specifications for resistance and tolerance (1 Ohm ±1%) but operates at reduced power rating (25W versus 50W). Physical dimensions differ (1.075" L x 1.102" W). Suitable only for applications where 25W power dissipation is sufficient.

Parameter Comparison

Engineering Selection Recommendations

NHS50 1R F: This substitute provides direct electrical and mechanical equivalence to the HS50 1R F. Both components maintain ROHS3 compliance, identical power ratings (50W), and equivalent thermal characteristics (±100ppm/°C). The NHS50 1R F includes additional features (non-inductive, pulse withstanding) that may provide enhanced performance in specific applications. Physical dimensions differ in width (1.102" versus 0.559"), requiring verification of mounting space constraints. This substitute is suitable for direct replacement in applications where the increased width is accommodated by the design.

HS25 1R F: This substitute maintains electrical equivalence in resistance value and tolerance (1 Ohm ±1%) but operates at half the power rating (25W versus 50W). Selection of this part is restricted to applications where the thermal load does not exceed 25W continuous dissipation. The HS25 1R F carries RoHS compliance (non-ROHS3 designation) and differs in physical dimensions. This substitute is not suitable for applications requiring the full 50W power rating of the main part.

Frequently Asked Questions (FAQ)

Q: Can NHS50 1R F replace HS50 1R F in all applications?

A: NHS50 1R F provides electrical and power rating equivalence to HS50 1R F. Physical dimensions differ in width (1.102" versus 0.559"), requiring confirmation that the increased width is compatible with the circuit board layout and mechanical assembly constraints.

Q: Under what conditions is HS25 1R F a suitable substitute?

A: HS25 1R F is suitable only for applications where continuous power dissipation does not exceed 25W. The reduced power rating makes this part unsuitable for circuits designed to operate at the full 50W capacity of the main part. Thermal analysis of the specific application is required to confirm compatibility.

Q: Are all three parts electrically equivalent?

A: All three parts (HS50 1R F, NHS50 1R F, HS25 1R F) share identical resistance values (1 Ohm) and tolerance specifications (±1%). They differ in power rating and physical dimensions. Electrical equivalence is confirmed for resistance and tolerance; thermal equivalence depends on the application's power dissipation requirements.

Q: What compliance differences exist between the substitutes?

A: HS50 1R F and NHS50 1R F both maintain ROHS3 compliance. HS25 1R F carries RoHS compliance without the ROHS3 designation. Both HS50 1R F and NHS50 1R F are REACH Unaffected; HS25 1R F shows Vendor Undefined REACH status. Compliance requirements of the end application determine whether these differences are material to part selection.

Q: Do the substitutes have identical mounting configurations?

A: All three parts feature aluminum housing, flanged mounting, and solder lug leads. Physical dimensions differ: HS50 1R F measures 1.933" L x 0.559" W; NHS50 1R F measures 1.933" L x 1.102" W; HS25 1R F measures 1.075" L x 1.102" W. Circuit board layout must accommodate these dimensional variations.