Equivalent & Substitute Parts for Ohmite 805F7R5

Part Overview

The Ohmite 805F7R5 is a 7.5 Ohms ±1% 5W wirewound chassis mount resistor from the Metal-Mite®89 series. This component is classified as obsolete, making identification of suitable alternatives essential for ongoing design support and production continuity. The part features aluminum housing with flanged mounting and solder lug termination, designed for applications requiring precision wirewound resistance in compact form factors.

Substiute Parts

805F7R5

OhmiteIn Stock: 727805F7R5 Datasheet

Current PartRFQ

805F7R5E

OhmiteIn Stock: 902805F7R5E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 805F7R5 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must maintain identical resistance value (7.5 Ohms), tolerance (±1%), power rating (5W), temperature coefficient (±50ppm/°C), operating temperature range (-55°C to 275°C), composition (wirewound), housing material (aluminum), mounting configuration (flanges), lead style (solder lugs), and physical dimensions (0.600" L x 0.646" W, height 0.330" max).

The primary substitute identified is the Ohmite 805F7R5E, which matches all specified parameters while offering active product status and improved compliance posture.

Parameter Comparison

Engineering Selection Recommendations

The 805F7R5E is the direct functional equivalent of the obsolete 805F7R5. Both components are manufactured by Ohmite within the Metal-Mite®89 series and provide identical electrical performance and mechanical compatibility. The 805F7R5E offers two significant advantages: active product status ensures ongoing availability and supply chain stability, and ROHS3 compliance aligns with current regulatory requirements, whereas the original part carries RoHS non-compliant status.

For applications requiring the 7.5 Ohms ±1% 5W wirewound chassis mount resistor specification, the 805F7R5E provides direct substitution without design modification or performance compromise.

Frequently Asked Questions (FAQ)

Q: Can the 805F7R5E be used as a direct replacement for the 805F7R5?

A: Yes. The 805F7R5E provides complete electrical and mechanical equivalence. All critical parameters—resistance value, tolerance, power rating, temperature coefficient, operating temperature range, composition, housing material, mounting configuration, lead style, and physical dimensions—are identical between the two parts.

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

A: The 805F7R5 is obsolete with RoHS non-compliant status, while the 805F7R5E is an active product with ROHS3 compliance. The 805F7R5E also ships in tray packaging versus the unspecified packaging of the original part.

Q: Are there any dimensional or mounting differences?

A: No. Both parts share identical physical dimensions (0.600" L x 0.646" W, 15.24mm x 16.41mm) and maximum seated height (0.330" or 8.38mm). Flanged mounting and solder lug termination are identical.

Q: Does the 805F7R5E maintain the same temperature performance?

A: Yes. The temperature coefficient (±50ppm/°C) and operating temperature range (-55°C to 275°C) are identical for both parts.

Q: What packaging format is the 805F7R5E supplied in?

A: The 805F7R5E is supplied in tray packaging, which is standard for production quantities of this component type.