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HS50 1R J Wirewound Chassis Mount Resistor - Equivalent & Substitute Parts
Part Overview
The HS50 1R J is a 1 Ohm ±5% 50W wirewound chassis mount resistor manufactured by Ohmite in the ARCOL HS series. This component is an active product with 759 units in stock. The part features aluminum housing with flanged mounting and solder lug connections, designed for applications requiring high power dissipation in a compact form factor. Substitute parts are identified when design requirements allow for tolerance, power rating, or dimensional variations while maintaining core electrical functionality.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Resistance | 1 Ohms |
| Tolerance | ±5% |
| Power Rating | 50W |
| Composition | Wirewound |
| Temperature Coefficient | ±100ppm/°C |
| Housing Type | Aluminum |
| Mounting Feature | Flanges |
| Lead Style | Solder Lugs |
| Package Type | Axial, Box |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the HS50 1R J is determined by three primary parameters: resistance value, composition type, and mounting configuration. All identified substitutes maintain the 1 Ohm resistance specification and wirewound composition with aluminum housing and flanged mounting.
Substitutes are grouped into two categories based on allowed variations:
Category 1: Same Power Rating (50W) with Tighter Tolerance
- HS50 1R F (Ohmite): Identical power rating and dimensions; tolerance upgraded to ±1%
- NHS50 1R F (Ohmite): Identical power rating; width increased to 1.102"; tolerance ±1%; includes non-inductive and pulse withstanding features
Category 2: Reduced Power Rating (25W) with Tighter Tolerance
- HS25 1R F (ARCOL): Power reduced to 25W; tolerance ±1%; dimensions reduced to 1.075" L x 1.102" W
- HS25 1R J (ARCOL): Power reduced to 25W; tolerance maintained at ±5%; dimensions reduced to 1.075" L x 1.102" W
All substitutes share identical temperature coefficient (±100ppm/°C), lead style (solder lugs), and package configuration (axial, box).
Parameter Comparison
| Part Number | Manufacturer | Resistance | Tolerance | Power (W) | Length (mm) | Width (mm) | Height (mm) | RoHS Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|
| HS50 1R J | Ohmite | 1 Ohms | ±5% | 50 | 49.10 | 14.20 | 14.80 | ROHS3 Compliant | 759 Pcs |
| HS50 1R F | Ohmite | 1 Ohms | ±1% | 50 | 49.10 | 14.20 | 14.80 | ROHS3 Compliant | 1076 Pcs |
| NHS50 1R F | Ohmite | 1 Ohms | ±1% | 50 | 49.10 | 28.00 | 14.80 | ROHS3 Compliant | 866 Pcs |
| HS25 1R F | ARCOL | 1 Ohms | ±1% | 25 | 27.30 | 28.00 | 14.80 | RoHS Compliant | 1060 Pcs |
| HS25 1R J | ARCOL | 1 Ohms | ±5% | 25 | 27.30 | 28.00 | 14.80 | RoHS Compliant | 3127 Pcs |
Engineering Selection Recommendations
Direct Substitution (No Design Modification Required): HS50 1R F is the primary substitute for HS50 1R J. Both parts maintain identical dimensions (49.10mm L x 14.20mm W x 14.80mm H), 50W power rating, and ROHS3 compliance. The tolerance improvement from ±5% to ±1% provides enhanced precision without circuit redesign. Both are manufactured by Ohmite within the ARCOL HS series.
Conditional Substitution (Design Verification Required): NHS50 1R F substitutes for HS50 1R J with dimensional variation in width (28.00mm vs. 14.20mm). This part maintains 50W power rating and ROHS3 compliance but includes non-inductive and pulse withstanding features. PCB layout accommodation for increased width must be verified.
HS25 1R F and HS25 1R J are substitutes only when circuit design permits 25W power dissipation instead of 50W. Both parts reduce physical footprint (27.30mm L x 28.00mm W) and maintain RoHS compliance. HS25 1R F provides ±1% tolerance; HS25 1R J maintains ±5% tolerance matching the original specification.
Frequently Asked Questions (FAQ)
Q: Can HS50 1R F replace HS50 1R J without any circuit modifications? A: Yes. HS50 1R F is a direct substitute with identical dimensions, power rating, and mounting configuration. The tolerance change from ±5% to ±1% improves accuracy without requiring circuit redesign.
Q: What is the key difference between HS50 1R J and NHS50 1R F? A: Both maintain 50W power rating and ±1% tolerance. NHS50 1R F has increased width (28.00mm vs. 14.20mm) and includes non-inductive and pulse withstanding features. PCB layout must accommodate the wider package.
Q: Can I use HS25 1R J as a substitute for HS50 1R J? A: HS25 1R J is a substitute only if your circuit design allows 25W power dissipation instead of 50W. The part maintains ±5% tolerance and reduces physical dimensions. Thermal analysis is required to confirm adequate heat dissipation at the lower power rating.
Q: Are all substitutes RoHS compliant? A: HS50 1R F and NHS50 1R F are ROHS3 compliant, matching the original HS50 1R J. HS25 1R F and HS25 1R J are RoHS compliant. Both compliance levels meet current environmental regulations.
Q: What is the inventory status for substitute parts? A: HS50 1R F has 1076 units in stock. NHS50 1R F has 866 units. HS25 1R F has 1060 units. HS25 1R J has 3127 units, the highest availability among all substitutes.
Q: Do all substitutes use the same lead style and package configuration? A: Yes. All substitutes use solder lugs as the lead style and axial box package configuration, maintaining compatibility with existing PCB designs for mounting and soldering.
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