HS25 7R5 F Equivalent & Substitute Parts

Part Overview

The HS25 7R5 F is a 25-watt wirewound chassis mount resistor manufactured by Ohmite, rated at 7.5 ohms with ±1% tolerance. This component is designed for applications requiring high power dissipation with stable resistance values in compact form factors. The part maintains active product status with 1106 units in current inventory. Substitute parts are identified to provide alternative sourcing options when the primary part becomes unavailable or when packaging requirements differ.

Substiute Parts

HS25 7R5 F

OhmiteIn Stock: 1186HS25 7R5 F Datasheet

Current PartRFQ

825F7R5E

OhmiteIn Stock: 1613825F7R5E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 825F7R5E qualifies as a direct substitute for the HS25 7R5 F based on the following critical parameters:

• Identical resistance value: 7.5 ohms
• Identical tolerance: ±1%
• Identical power rating: 25W
• Identical composition: Wirewound
• Identical housing material: Aluminum
• Identical mounting configuration: Flanges with solder lugs
• Equivalent mechanical footprint within acceptable tolerance ranges
• Both parts maintain RoHS compliance

The 825F7R5E belongs to Ohmite's Metal-Mite®89 series and represents a functionally equivalent alternative with comparable electrical performance and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the HS25 7R5 F and 825F7R5E maintain active product status and full RoHS compliance, qualifying them for equivalent use in applications requiring 7.5-ohm, 25-watt wirewound resistors with ±1% tolerance. The 825F7R5E offers improved temperature coefficient stability at ±50ppm/°C compared to the HS25 7R5 F at 100ppm/°C, making it suitable for temperature-sensitive applications. Mechanical dimensions are within acceptable substitution ranges, with the 825F7R5E featuring slightly more compact proportions. Selection between these parts should be based on packaging requirements (box versus tray) and inventory availability rather than electrical performance differences.

Frequently Asked Questions (FAQ)

Q: Can the 825F7R5E replace the HS25 7R5 F in existing designs?

A: Yes. Both parts share identical electrical specifications (7.5 ohms, ±1%, 25W) and equivalent mechanical mounting configurations. Dimensional variations are minor and fall within standard PCB layout tolerances for chassis mount resistors with flanged mounting.

Q: What is the primary difference between these two parts?

A: The 825F7R5E features a lower temperature coefficient (±50ppm/°C versus 100ppm/°C) and comes in tray packaging rather than box packaging. The 825F7R5E also provides ROHS3 compliance versus standard RoHS compliance.

Q: Are there any compatibility concerns with PCB mounting?

A: No. Both parts use identical solder lug lead styles and flange mounting features. The dimensional differences (approximately 0.013" in length and width, 0.027" in height) do not affect standard PCB hole patterns or mounting bracket compatibility.

Q: Which part should be selected for new designs?

A: The 825F7R5E is recommended for new designs due to superior temperature coefficient performance and enhanced ROHS3 compliance status, provided tray packaging meets production requirements.

Q: Are both parts currently available?

A: Yes. The HS25 7R5 F has 1106 units in stock, and the 825F7R5E has 1594 units in stock, both as new original inventory.