Equivalent & Substitute Parts for Ohmite 805F25K

Part Overview

The Ohmite 805F25K is a 25 kOhms ±1% 5W wirewound chassis mount resistor from the Metal-Mite®89 series. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The obsolete status necessitates sourcing alternative components that maintain electrical and mechanical compatibility with existing applications.

Substiute Parts

805F25K

OhmiteIn Stock: 1066805F25K Datasheet

Current PartRFQ

825F25KE

ARCOLIn Stock: 1168825F25KE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Ohmite 805F25K is determined by the following critical parameters:

• Resistance Value: 25 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Wirewound (exact match required)
• Mounting Feature: Flanges (exact match required)
• Lead Style: Solder Lugs (exact match required)
• Housing Type: Aluminum (exact match required)
• Series: Metal-Mite®89 (exact match required)

The ARCOL 825F25KE meets all substitution criteria. While the power rating differs (25W versus 5W), this represents an upgrade in thermal capability and does not compromise compatibility. The higher power rating ensures the substitute part can handle the same electrical load with improved thermal margin.

Parameter Comparison

Engineering Selection Recommendations

The ARCOL 825F25KE is the qualified substitute for the Ohmite 805F25K. Selection of this substitute is based on the following factors:

• Product Status: The ARCOL 825F25KE maintains active product status, ensuring continued availability and supply chain reliability.
• Compliance: The ARCOL 825F25KE is RoHS compliant, meeting current environmental and regulatory requirements. The original Ohmite 805F25K is RoHS non-compliant.
• Electrical Equivalence: Both components share identical resistance, tolerance, temperature coefficient, and composition specifications.
• Mechanical Compatibility: Both components feature identical mounting features, lead styles, and housing types, ensuring direct physical compatibility.
• Thermal Upgrade: The increased power rating (25W versus 5W) provides enhanced thermal performance without affecting electrical operation.

Frequently Asked Questions (FAQ)

Q: Can the ARCOL 825F25KE be used as a direct replacement for the Ohmite 805F25K?

A: Yes. The ARCOL 825F25KE meets all electrical and mechanical specifications required for substitution. The components share identical resistance, tolerance, temperature coefficient, mounting features, and lead styles. The higher power rating of the ARCOL part represents an upgrade in thermal capability.

Q: What is the difference in physical size between these components?

A: The Ohmite 805F25K measures 0.600" L x 0.646" W with a seated height of 0.330". The ARCOL 825F25KE measures 1.075" L x 1.102" W with a seated height of 0.583". The larger dimensions of the ARCOL part accommodate its higher power rating. Physical space availability must be verified before substitution.

Q: Why is the power rating different between the original and substitute?

A: The ARCOL 825F25KE is rated for 25W compared to the 5W rating of the Ohmite 805F25K. This difference reflects the physical size increase and improved thermal dissipation capability of the substitute part. The higher power rating does not affect electrical operation in applications requiring 5W or less.

Q: Are there compliance differences between these parts?

A: Yes. The Ohmite 805F25K is RoHS non-compliant, while the ARCOL 825F25KE is RoHS compliant. For applications subject to RoHS requirements, the ARCOL substitute is the appropriate choice.

Q: What packaging is available for the ARCOL 825F25KE?

A: The ARCOL 825F25KE is supplied in bulk packaging. Moisture sensitivity level is rated as 1 (Unlimited).