HS50 75R F Equivalent & Substitute Parts

Part Overview

The HS50 75R F is a 50-watt wirewound chassis mount resistor manufactured by Ohmite, rated at 75 ohms with ±1% tolerance. This component is designed for applications requiring high power dissipation with stable resistance values in compact form factors. The part is currently active in production with 969 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility allow direct replacement in circuit designs.

Substiute Parts

HS50 75R F

OhmiteIn Stock: 1062HS50 75R F Datasheet

Current PartRFQ

HS25 75R F

OhmiteIn Stock: 1450HS25 75R F Datasheet

Parametric EquivalentRFQ

850F75RE

OhmiteIn Stock: 1052850F75RE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HS50 75R F is determined by the following critical parameters:

Primary Criteria (Must Match):

• Resistance value: 75 Ohms
• Tolerance: ±1%
• Composition: Wirewound
• Housing type: Aluminum
• Mounting feature: Flanges
• Lead style: Solder Lugs

Secondary Criteria (Allowable Variation):

• Power rating: Equal or greater than 50W
• Temperature coefficient: Within acceptable operational range
• Physical dimensions: Compatible with chassis mount applications
• Compliance certifications: RoHS or equivalent environmental standards

Two substitute parts meet these criteria: the HS25 75R F (parametric equivalent with reduced power rating) and the 850F75RE (direct manufacturer equivalent with enhanced specifications).

Parameter Comparison

Engineering Selection Recommendations

HS50 75R F (Primary Part): All three parts maintain active production status with confirmed inventory availability. The HS50 75R F is RoHS Compliant and suitable for standard industrial applications requiring 50-watt dissipation.

850F75RE (Direct Equivalent): This part provides equivalent 50-watt power handling with superior temperature coefficient performance (±20ppm/°C versus 100ppm/°C) and extended operating temperature range (-55°C ~ 275°C). ROHS3 compliance provides enhanced environmental standards. Physical dimensions are nearly identical to the main part, with maximum height difference of 0.037" (0.95mm). This part is suitable for applications requiring improved thermal stability and wider temperature operation.

HS25 75R F (Parametric Equivalent): This part shares identical resistance, tolerance, and mounting characteristics but is rated for 25-watt dissipation. Physical dimensions are significantly smaller (approximately 44% reduction in length and 49% reduction in width). This part is suitable only for applications where power dissipation does not exceed 25 watts. ROHS3 compliance is provided.

Frequently Asked Questions (FAQ)

Q: Can the HS25 75R F replace the HS50 75R F in all applications?

A: No. The HS25 75R F is rated for maximum 25-watt dissipation. It can only replace the HS50 75R F in circuits where actual power dissipation does not exceed 25 watts. Exceeding this rating will cause component failure.

Q: What are the key differences between the HS50 75R F and 850F75RE?

A: Both parts provide 50-watt dissipation at 75 ohms ±1%. The 850F75RE offers superior temperature coefficient stability (±20ppm/°C versus 100ppm/°C) and extended operating temperature range (-55°C ~ 275°C). Physical dimensions are nearly identical. The 850F75RE is manufactured under the Metal-Mite®89 series with ROHS3 compliance.

Q: Are all three parts mechanically compatible with existing PCB layouts?

A: The HS50 75R F and 850F75RE have nearly identical dimensions and are mechanically compatible. The HS25 75R F has significantly smaller dimensions and may not be compatible with layouts designed for the 50-watt versions without mechanical redesign.

Q: What compliance certifications apply to these parts?

A: The HS50 75R F carries RoHS Compliant certification. Both substitute parts (HS25 75R F and 850F75RE) carry ROHS3 Compliant certification, representing enhanced environmental compliance standards.

Q: Can these parts be used interchangeably in high-temperature applications?

A: The 850F75RE is specified for operation from -55°C to 275°C. The HS50 75R F and HS25 75R F do not have specified operating temperature ranges. For applications requiring extended temperature operation, the 850F75RE is the appropriate selection.