Equivalent & Substitute Parts for Ohmite 805F5R0

Part Overview

The Ohmite 805F5R0 is a 5 Ohms ±1% 5W wirewound chassis mount resistor from the Metal-Mite®89 series. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The part features aluminum housing with flanged mounting and solder lug termination, suitable for applications requiring precision wirewound resistors with stable temperature characteristics across extended operating ranges.

Substiute Parts

805F5R0

OhmiteIn Stock: 1096805F5R0 Datasheet

Current PartRFQ

805F5R0E

OhmiteIn Stock: 2078805F5R0E Datasheet

DirectRFQ

RH0055R000FC02

Vishay DaleIn Stock: 717RH0055R000FC02 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 805F5R0 is based on strict electrical and mechanical parameter matching. The following criteria determine valid substitutes:

Primary Substitution Criteria:

• Resistance value: 5 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Wirewound (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)
• Housing Type: Aluminum (exact match required)
• Mounting Feature: Flanges (exact match required)
• Lead Style: Solder Lugs (exact match required)
• Package Type: Axial, Box (exact match required)
• Physical Dimensions: 0.600" L x 0.646" W (exact match required)

Secondary Considerations:

• Power rating may exceed the original specification (uprating acceptable)
• Operating temperature range may differ within acceptable limits
• Packaging format (tray, bulk) does not affect electrical compatibility
• RoHS and REACH compliance status reflects regulatory requirements but does not affect functional substitution

Parameter Comparison

Engineering Selection Recommendations

805F5R0E (Ohmite): This part is the direct equivalent from the same manufacturer. It maintains identical electrical and mechanical specifications while offering active product status and ROHS3 compliance. The tray packaging format provides standard handling and storage benefits. This substitute is suitable for applications where regulatory compliance and manufacturer continuity are required.

RH0055R000FC02 (Vishay Dale): This part provides equivalent electrical performance with a higher power rating of 7.5W, offering thermal margin above the original 5W specification. The maximum seated height increases by 0.005" (0.13mm), which must be verified against mechanical constraints in the application. The operating temperature range is reduced to -55°C ~ 250°C, which is acceptable for most applications but must be confirmed if operation above 250°C is required. REACH Affected status indicates regulatory considerations for specific markets.

Frequently Asked Questions (FAQ)

Q: Can the 805F5R0E be used as a direct replacement for the 805F5R0?

A: Yes. The 805F5R0E maintains identical electrical specifications (5 Ohms ±1%, 5W, ±50ppm/°C) and mechanical dimensions (0.600" L x 0.646" W, 0.330" height). The primary difference is product status (active versus obsolete) and improved RoHS3 compliance. Packaging format differs (tray versus original specification) but does not affect electrical compatibility.

Q: Is the RH0055R000FC02 suitable for applications requiring 5W power dissipation?

A: Yes. The RH0055R000FC02 is rated for 7.5W, which exceeds the original 5W requirement. This provides additional thermal margin and is electrically compatible. However, the maximum seated height is 0.335" compared to 0.330" for the original part. Verify that the additional 0.005" (0.13mm) height does not conflict with mechanical constraints in your application.

Q: What is the impact of the reduced operating temperature range in the RH0055R000FC02?

A: The RH0055R000FC02 operates from -55°C to 250°C, compared to -55°C to 275°C for the 805F5R0. If your application requires operation above 250°C, the RH0055R000FC02 is not suitable. For applications with maximum operating temperatures at or below 250°C, this substitute is fully compatible.

Q: Does RoHS compliance affect the electrical performance of these substitutes?

A: No. RoHS compliance is a regulatory and material composition requirement that does not alter electrical performance. The 805F5R0E (ROHS3 compliant) and RH0055R000FC02 (RoHS non-compliant) are electrically equivalent to the original 805F5R0. Selection should be based on regulatory requirements for your target market.

Q: Are there any mechanical compatibility concerns when substituting these parts?

A: The 805F5R0E is mechanically identical to the original part. The RH0055R000FC02 has a maximum seated height of 0.335" versus 0.330" for the original—a difference of 0.005" (0.13mm). Verify this height difference against your PCB layout and mechanical assembly constraints before implementation.