HS25 40R F Equivalent & Substitute Parts

Part Overview

The HS25 40R F is a 25-watt wirewound chassis mount resistor manufactured by Ohmite, rated at 40 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 in active production status with full RoHS compliance. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range for this resistor category.

Substiute Parts

HS25 40R F

OhmiteIn Stock: 1155HS25 40R F Datasheet

Current PartRFQ

825F40RE

OhmiteIn Stock: 1317825F40RE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 825F40RE qualifies as a direct substitute for the HS25 40R F based on the following critical parameters:

• Resistance value: 40 Ohms (identical)
• Tolerance: ±1% (identical)
• Power rating: 25W (identical)
• Composition: Wirewound (identical)
• Housing type: Aluminum (identical)
• Mounting feature: Flanges (identical)
• Lead style: Solder Lugs (identical)
• RoHS compliance: Both parts meet RoHS requirements

Both parts are manufactured by Ohmite and maintain equivalent electrical and mechanical characteristics within the specified parameter tolerances for this resistor category.

Parameter Comparison

Engineering Selection Recommendations

Both the HS25 40R F and 825F40RE are active production components from Ohmite with full RoHS compliance certifications. The 825F40RE offers an enhanced temperature coefficient specification (±20ppm/°C versus 100ppm/°C) and a defined operating temperature range of -55°C to 275°C, providing additional performance data for applications with strict thermal requirements. Dimensional differences are minimal, with the 825F40RE measuring slightly smaller in length, width, and height while maintaining identical mounting and lead configurations. Both parts carry MSL Level 1 (Unlimited) moisture sensitivity ratings and identical ECCN and HTSUS classifications.

Frequently Asked Questions (FAQ)

Q: Can the 825F40RE replace the HS25 40R F in existing designs?

A: Yes. Both parts share identical electrical specifications (40 Ohms, ±1%, 25W) and mechanical mounting features (aluminum housing, flanges, solder lugs). Dimensional variations are within typical PCB layout tolerances for chassis mount resistors.

Q: What is the difference in temperature coefficient between these parts?

A: The HS25 40R F specifies 100ppm/°C, while the 825F40RE specifies ±20ppm/°C. The 825F40RE provides superior temperature stability. Applications requiring minimal resistance drift across temperature ranges should prioritize the 825F40RE.

Q: Are there packaging differences between these parts?

A: The HS25 40R F is supplied in box packaging, while the 825F40RE is supplied in bulk packaging. Both use identical component construction and lead styles.

Q: Do both parts meet current RoHS requirements?

A: Yes. The HS25 40R F is RoHS Compliant, and the 825F40RE is ROHS3 Compliant, both meeting current regulatory standards.

Q: What are the physical dimension tolerances for substitution?

A: The 825F40RE is approximately 0.013" shorter in length and 0.008" shorter in width compared to the HS25 40R F. Height difference is 0.027". These variations are typical for equivalent resistor designs and do not affect standard PCB mounting patterns for flanged chassis mount resistors.