HS75 4R7 J Equivalent & Substitute Parts

Part Overview

The HS75 4R7 J is a 75-watt wirewound chassis mount resistor manufactured by Ohmite, rated at 4.7 ohms with ±5% tolerance. This component is designed for high-power applications requiring reliable thermal dissipation through aluminum housing and flanged mounting. The part is currently active in production with full RoHS compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within specified parameter ranges.

Substiute Parts

HS75 4R7 J

OhmiteIn Stock: 931HS75 4R7 J Datasheet

Current PartRFQ

HS75 4R7 F

ARCOLIn Stock: 1145HS75 4R7 F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HS75 4R7 J is determined by the following critical parameters:

• Resistance value: 4.7 ohms (exact match required)
• Power rating: 75W (exact match required)
• Composition: Wirewound (exact match required)
• Housing type: Aluminum (exact match required)
• Mounting feature: Flanges (exact match required)
• Lead style: Solder lugs (exact match required)
• RoHS compliance: Required
• Tolerance: ±5% or tighter acceptable

The substitute part HS75 4R7 F meets all critical electrical and mechanical parameters. Tolerance is tighter (±1% versus ±5%), which represents improved precision without compromising compatibility. Physical dimensions remain within acceptable mounting envelope specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the HS75 4R7 J and HS75 4R7 F are active production components with full RoHS compliance. The HS75 4R7 F offers tighter tolerance specification (±1% versus ±5%), which may provide improved circuit performance in applications requiring higher precision. Both parts maintain identical power dissipation capability, thermal characteristics, and mechanical mounting compatibility. Selection between these parts should be based on tolerance requirements and availability constraints specific to your application.

Frequently Asked Questions (FAQ)

Q: Can HS75 4R7 F replace HS75 4R7 J in existing designs?

A: Yes. Both parts share identical resistance value, power rating, composition, housing type, mounting features, and lead style. The substitute part features tighter tolerance, which is compatible with applications designed for the original part.

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

A: The HS75 4R7 J has ±5% tolerance, while the HS75 4R7 F has ±1% tolerance. Tighter tolerance means the actual resistance value will be closer to the nominal 4.7-ohm specification.

Q: Are the physical dimensions identical?

A: Length and maximum seated height are identical between both parts. Width differs slightly (1.870" versus 1.075"), but both maintain the same mounting flange configuration and solder lug lead style.

Q: Do both parts meet RoHS requirements?

A: Yes. Both HS75 4R7 J and HS75 4R7 F are RoHS compliant with unlimited moisture sensitivity rating.

Q: What packaging differences exist?

A: The HS75 4R7 J is supplied in box packaging, while the HS75 4R7 F is supplied in bulk packaging. This affects order quantities and handling but does not impact electrical or mechanical performance.