805F4K5 Wirewound Chassis Mount Resistor - Equivalent & Substitute Parts

Part Overview

The Ohmite 805F4K5 is a 4.5 kOhms ±1% 5W wirewound chassis mount resistor designed for high-power applications requiring precision and thermal stability. This component features aluminum housing with flanged mounting and solder lug termination, suitable for industrial and military-grade electronic assemblies.

The 805F4K5 is classified as obsolete. Locating direct replacements is necessary for ongoing production support, maintenance, and system upgrades where this specific resistance value and power rating are required.

Substiute Parts

805F4K5

OhmiteIn Stock: 1123805F4K5 Datasheet

Current PartRFQ

805F4K5E

OhmiteIn Stock: 1146805F4K5E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 805F4K5 is determined by strict equivalence across all critical electrical and mechanical parameters:

• Resistance Value: Must be 4.5 kOhms
• Tolerance: Must be ±1%
• Power Rating: Must be 5W
• Composition: Must be Wirewound
• Temperature Coefficient: Must be ±20ppm/°C
• Operating Temperature Range: Must be -55°C to 275°C
• Housing Material: Must be Aluminum
• Mounting Feature: Must include Flanges
• Lead Style: Must be Solder Lugs
• Package Type: Must be Axial, Box
• Physical Dimensions: Must match 0.600" L x 0.646" W (15.24mm x 16.41mm)

The substitute part 805F4K5E meets all these criteria and is manufactured by Ohmite under the Metal-Mite®89 series.

Parameter Comparison

Engineering Selection Recommendations

The 805F4K5E is the direct equivalent substitute for the obsolete 805F4K5. Both components are manufactured by Ohmite and share identical electrical and mechanical specifications across all critical parameters.

The 805F4K5E offers the following advantages:

• Active Product Status: Currently in production and supported by the manufacturer
• ROHS3 Compliance: Meets current regulatory requirements, whereas the original part is RoHS non-compliant
• Improved Availability: Tray packaging format supports modern manufacturing workflows

The 805F4K5E is suitable for direct substitution in all applications where the 805F4K5 was originally specified, with no circuit redesign or validation required.

Frequently Asked Questions (FAQ)

Q: Can the 805F4K5E be used as a direct replacement for the 805F4K5?

A: Yes. The 805F4K5E is electrically and mechanically identical to the 805F4K5 across all specified parameters, including resistance value, tolerance, power rating, temperature coefficient, operating temperature range, housing material, mounting features, and physical dimensions.

Q: What is the difference between the 805F4K5 and 805F4K5E?

A: The primary differences are product status and regulatory compliance. The 805F4K5 is obsolete and RoHS non-compliant, while the 805F4K5E is an active product with ROHS3 compliance. Packaging differs: the original uses bulk packaging, while the substitute uses tray packaging.

Q: Are there any compatibility concerns when substituting the 805F4K5E for the 805F4K5?

A: No compatibility concerns exist. The components are pin-compatible, dimensionally identical, and electrically equivalent. The tray packaging of the 805F4K5E is compatible with standard component handling and placement equipment.

Q: Does the 805F4K5E meet current regulatory standards?

A: Yes. The 805F4K5E is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: What is the temperature coefficient specification for these resistors?

A: Both the 805F4K5 and 805F4K5E have a temperature coefficient of ±20ppm/°C, ensuring stable resistance performance across the operating temperature range of -55°C to 275°C.