HS75 1R J Equivalent & Substitute Parts

Part Overview

The HS75 1R J is a 75-watt wirewound chassis mount resistor manufactured by Ohmite, rated at 1 ohm with ±5% tolerance. This component is designed for high-power applications requiring reliable pulse withstanding capability and thermal stability. The part is currently in active production status with 1005 units available in inventory. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for this product category.

Substiute Parts

HS75 1R J

OhmiteIn Stock: 1022HS75 1R J Datasheet

Current PartRFQ

HS75 1R F

ARCOLIn Stock: 802HS75 1R F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The HS75 1R F qualifies as a parametric equivalent based on the following critical parameters:

• Resistance value: 1 Ohms (identical)
• Power rating: 75W (identical)
• Composition: Wirewound (identical)
• Housing type: Aluminum (identical)
• Mounting feature: Flanges (identical)
• Lead style: Solder Lugs (identical)
• Temperature coefficient: ±100ppm/°C (functionally equivalent to 100ppm/°C)

The substitute part maintains all core electrical and mechanical characteristics required for direct substitution in applications designed for the HS75 1R J. Tolerance specification differs (±1% vs ±5%), representing an improvement in precision that does not restrict compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the HS75 1R J and HS75 1R F are active production components with full RoHS compliance. The HS75 1R F offers improved tolerance specification (±1% vs ±5%), which provides greater precision for applications requiring tighter resistance values. The dimensional difference in width (1.870" vs 1.075") must be evaluated against available board space in the target application. Both components share identical height and length dimensions, identical power ratings, and equivalent thermal characteristics. Selection between these parts should be based on tolerance requirements and physical space constraints within the assembly.

Frequently Asked Questions (FAQ)

Q: Can the HS75 1R F directly replace the HS75 1R J in existing designs?

A: Yes, the HS75 1R F is a direct parametric equivalent. Both components share identical resistance values, power ratings, temperature coefficients, housing materials, and mounting configurations. The primary difference is improved tolerance (±1% vs ±5%), which does not restrict compatibility. Physical dimensions differ in width, requiring verification of available board space.

Q: What is the significance of the tolerance difference between these parts?

A: The HS75 1R J specifies ±5% tolerance, while the HS75 1R F specifies ±1% tolerance. The tighter tolerance of the substitute part ensures resistance values remain closer to the nominal 1 ohm specification. Applications requiring precise resistance values benefit from the ±1% specification, while applications with wider tolerance margins can use either part.

Q: Are there compliance differences between these components?

A: Both parts are RoHS compliant. The HS75 1R J carries RoHS Compliant status, while the HS75 1R F carries ROHS3 Compliant status. The HS75 1R F additionally lists REACH Unaffected status. Both components meet current environmental and regulatory requirements for electronic component use.

Q: How do the physical dimensions affect component selection?

A: The HS75 1R J measures 1.917" L x 1.870" W, while the HS75 1R F measures 1.917" L x 1.075" W. Both share identical height (0.949"). The narrower width of the HS75 1R F may provide advantages in space-constrained applications. Verify available board space and thermal dissipation requirements before final selection.

Q: What packaging formats are available for these parts?

A: The HS75 1R J is supplied in box packaging, while the HS75 1R F is supplied in bulk packaging. Both use identical axial lead configurations with solder lugs for mounting.