HS25 1R5 J Wirewound Chassis Mount Resistor – Equivalent & Substitute Parts

Part Overview

The HS25 1R5 J is a 1.5 Ohm, 25W wirewound chassis mount resistor manufactured by Ohmite in the ARCOL HS series. This component is designed for applications requiring precision power dissipation with aluminum housing and flange-mounted construction. The part is currently active in production with 1,093 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the allowed parameter tolerances for this resistor category.

Substiute Parts

HS25 1R5 J

OhmiteIn Stock: 1179HS25 1R5 J Datasheet

Current PartRFQ

HS25 1R5 F

ARCOLIn Stock: 1021HS25 1R5 F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the HS25 1R5 J is determined by the following critical parameters:

• Resistance Value: Must be 1.5 Ohms
• Power Rating: Must be 25W
• Composition: Must be Wirewound
• Housing Type: Must be Aluminum with Flange Mounting
• Physical Dimensions: Must match 1.075" L x 0.559" W and 0.583" max seated height
• Lead Style: Must be Solder Lugs
• Temperature Coefficient: Must be ±100ppm/°C
• Package Type: Must be Axial, Box

The HS25 1R5 F qualifies as a parametric equivalent because it maintains all critical electrical and mechanical parameters while offering improved tolerance specification (±1% versus ±5%).

Parameter Comparison

Engineering Selection Recommendations

Both the HS25 1R5 J and HS25 1R5 F are active production components with full RoHS compliance. The primary distinction is tolerance specification: the HS25 1R5 F provides ±1% tolerance compared to the ±5% tolerance of the HS25 1R5 J. Both parts maintain identical electrical performance characteristics, physical dimensions, and mounting configurations. Selection between these parts depends on circuit tolerance requirements. The HS25 1R5 F is suitable for applications requiring tighter resistance tolerance control, while the HS25 1R5 J remains appropriate for general-purpose 25W power dissipation applications where ±5% tolerance is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the HS25 1R5 F replace the HS25 1R5 J in existing designs?

A: Yes. The HS25 1R5 F maintains identical resistance value, power rating, physical dimensions, and mounting configuration. The improved ±1% tolerance of the HS25 1R5 F is a tighter specification than the ±5% tolerance of the HS25 1R5 J, making it a direct substitute for any application currently using the HS25 1R5 J.

Q: Are there any mechanical compatibility concerns between these parts?

A: No. Both parts share identical dimensions (1.075" L x 0.559" W, 0.583" max seated height), flange mounting features, and solder lug lead style. PCB layout and mechanical mounting remain unchanged.

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

A: The HS25 1R5 J carries ROHS3 Compliant status, while the HS25 1R5 F carries RoHS Compliant status. Both meet RoHS requirements for lead-free construction and hazardous substance restrictions.

Q: Which part should be selected for new designs?

A: Selection is based on tolerance requirements. For applications requiring ±1% tolerance precision, specify the HS25 1R5 F. For applications where ±5% tolerance is acceptable, either part is suitable. Both are active production components with adequate inventory availability.

Q: Are these parts interchangeable at the PCB assembly level?

A: Yes. Identical package type (Axial, Box), lead style (Solder Lugs), and physical footprint ensure direct interchangeability without PCB redesign or assembly process modification.