HS50 39R J Wirewound Chassis Mount Resistor - Equivalent & Substitute Parts

Part Overview

The HS50 39R J is a 39 Ohms ±5% 50W wirewound chassis mount resistor manufactured by Ohmite in the ARCOL HS series. This component is an active product with 680 units in stock. The resistor features aluminum housing with flanged mounting and solder lug termination, designed for applications requiring high power dissipation and mechanical stability. Substitute parts may be required due to inventory constraints, application-specific power requirements, or design optimization needs.

Key Parameters

Parameter	Value
Resistance	39 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 39R J is determined by the following critical parameters: resistance value (39 Ohms), tolerance (±5%), composition (wirewound), temperature coefficient (±100ppm/°C), housing type (aluminum), mounting feature (flanges), and lead style (solder lugs).

The substitute parts identified are:

HS25 39R J - Parametric equivalent with identical electrical characteristics (39 Ohms ±5%, wirewound, ±100ppm/°C) but reduced power rating (25W vs. 50W). This part is suitable for applications where the 50W power dissipation is not required.
HS50 39R J - Identical part number and specifications, confirming availability from the same manufacturer series with matching electrical and mechanical parameters.

All substitute parts maintain the same resistance, tolerance, composition, temperature coefficient, housing material, mounting configuration, and lead termination as the main part.

Parameter Comparison

Parameter	HS50 39R J (Main)	HS25 39R J (Substitute)	HS50 39R J (Substitute)
Manufacturer	Ohmite	ARCOL	ARCOL
Resistance	39 Ohms	39 Ohms	39 Ohms
Tolerance	±5%	±5%	±5%
Power Rating	50W	25W	50W
Composition	Wirewound	Wirewound	Wirewound
Temperature Coefficient	±100ppm/°C	±100ppm/°C	±100ppm/°C
Housing Type	Aluminum	Aluminum	Aluminum
Mounting Feature	Flanges	Flanges	Flanges
Lead Style	Solder Lugs	Solder Lugs	Solder Lugs
Package Type	Axial, Box	Axial, Box	Axial, Box
Series	ARCOL, HS	ARCOL, HS	ARCOL, HS
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	RoHS Compliant	RoHS Compliant

Engineering Selection Recommendations

The HS50 39R J and its substitute HS50 39R J (ARCOL variant) are functionally identical and both maintain active product status with full RoHS compliance. Both are suitable for direct substitution in applications requiring 50W power dissipation at 39 Ohms.

The HS25 39R J represents a parametric equivalent with reduced power rating. This part is suitable only for applications where the maximum power dissipation does not exceed 25W. Selection of the HS25 39R J should be based on verified thermal requirements and actual power dissipation calculations within the circuit design.

All substitute parts are active products with confirmed inventory availability and comply with applicable regulatory standards (RoHS, REACH, EAR99).

Frequently Asked Questions (FAQ)

Q: Can the HS25 39R J replace the HS50 39R J in all applications?

A: The HS25 39R J is electrically equivalent but has a reduced power rating of 25W compared to the 50W rating of the HS50 39R J. Substitution is valid only if the actual power dissipation in the application does not exceed 25W. Exceeding this limit will result in component failure.

Q: Are there dimensional differences between the HS50 39R J and HS25 39R J?

A: Yes. The HS50 39R J measures 1.933" L x 0.559" W (49.10mm x 14.20mm), while the HS25 39R J measures 1.075" L x 1.102" W (27.30mm x 28.00mm). Both have the same height when seated (0.583" / 14.80mm). Verify that the substitute part fits within the available PCB or chassis space.

Q: What is the difference between Ohmite and ARCOL manufacturers listed for these parts?

A: Both manufacturers are listed in the ARCOL HS series. The parts share identical electrical specifications and mechanical characteristics. Selection between manufacturers should be based on supply chain availability and procurement requirements.

Q: Are all substitute parts RoHS compliant?

A: The main part HS50 39R J is ROHS3 Compliant. The substitute parts HS25 39R J and HS50 39R J (ARCOL) are RoHS Compliant. Both compliance levels are acceptable for applications requiring RoHS certification.

Q: What is the temperature coefficient significance for these resistors?

A: All listed parts have a temperature coefficient of ±100ppm/°C. This specification indicates the resistance change per degree Celsius of temperature variation. This parameter is identical across all parts and does not affect substitution decisions.

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