Equivalent & Substitute Parts for Ohmite 810F2R0

Part Overview

The Ohmite 810F2R0 is a 2 Ohms ±1% 10W 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 current sensing and thermal management in chassis-mounted configurations.

Substiute Parts

810F2R0

OhmiteIn Stock: 889810F2R0 Datasheet

Current PartRFQ

810F2R0E

OhmiteIn Stock: 1209810F2R0E Datasheet

DirectRFQ

RH0102R000FC02

Vishay DaleIn Stock: 1123RH0102R000FC02 Datasheet

DirectRFQ

UAL10-2RF8

RiedonIn Stock: 1229UAL10-2RF8 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 810F2R0 are qualified based on the following electrical and mechanical parameters:

Core Substitution Criteria:

• Resistance value: 2 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Wirewound (exact match required)
• Temperature Coefficient: ±50ppm/°C (exact match required)
• Coating/Housing: Aluminum (exact match required)
• Mounting Feature: Flanges (exact match required)
• Lead Style: Solder Lugs (exact match required)
• Package/Case: Axial, Box (exact match required)

Allowable Variations:

• Power Rating: Equal to or greater than 10W
• Operating Temperature Range: Equal to or greater than the specified range
• Physical dimensions: Minor variations acceptable within industry standards for equivalent form factors
• Product Status: Active status preferred for long-term availability

Three substitute parts meet these criteria and are available from active manufacturers.

Parameter Comparison

Engineering Selection Recommendations

Ohmite 810F2R0E is the primary substitute. It is manufactured by the same supplier as the original part, maintains identical electrical specifications, and is currently in active production. This part offers RoHS compliance and improved long-term availability. Physical dimensions show minor variations (0.783" L x 0.827" W vs. 0.750" L x 0.812" W), which remain within acceptable tolerances for equivalent chassis mount applications.

Riedon UAL10-2RF8 is a secondary substitute offering full electrical equivalence with identical power rating and operating temperature range. This part achieves ROHS3 compliance and includes additional features such as current sense capability, flame proof construction, and pulse withstanding characteristics. Physical dimensions are closely matched to the original specification.

Vishay Dale RH0102R000FC02 is a tertiary substitute with higher power rating (12.5W vs. 10W), providing additional thermal margin. Operating temperature range is limited to -55°C ~ 250°C, which is 25°C below the original specification. This part is suitable for applications not requiring the full upper temperature range of the original component.

Frequently Asked Questions (FAQ)

Q: Can the 810F2R0E directly replace the obsolete 810F2R0?

A: Yes. The 810F2R0E maintains identical electrical specifications (2 Ohms ±1%, 10W, ±50ppm/°C) and mechanical form factor. Minor dimensional variations (approximately 0.03" in length and width) are within acceptable tolerances for chassis mount applications. The part is pin-compatible with solder lug termination.

Q: What is the difference between the Ohmite 810F2R0E and Riedon UAL10-2RF8?

A: Both parts are electrically equivalent with identical resistance, tolerance, power rating, and temperature coefficient. The Riedon part includes additional features (current sense, flame proof, pulse withstanding) and achieves ROHS3 compliance. Physical dimensions are comparable. Selection depends on compliance requirements and feature necessity for the application.

Q: Why does the Vishay Dale RH0102R000FC02 have a higher power rating?

A: The RH0102R000FC02 is rated at 12.5W compared to 10W for the original part. This higher rating provides additional thermal headroom and may offer improved reliability in high-dissipation applications. However, the operating temperature maximum is limited to 250°C versus 275°C for the original specification.

Q: Are there dimensional compatibility concerns with these substitutes?

A: All substitute parts maintain the same mounting feature (flanges) and lead style (solder lugs). Dimensional variations are minor and within industry standards for equivalent chassis mount resistors. Verify mounting clearances in your specific application if space constraints are critical.

Q: Which substitute offers the best compliance profile?

A: The Riedon UAL10-2RF8 achieves ROHS3 compliance and is REACH unaffected. The Ohmite 810F2R0E is RoHS compliant. The Vishay Dale RH0102R000FC02 is RoHS non-compliant and REACH affected. Selection should align with your product's regulatory requirements.

Q: Can I use these substitutes interchangeably in existing designs?

A: Yes, provided the application does not require the full -55°C ~ 275°C operating range. For applications limited to -55°C ~ 250°C, all three substitutes are interchangeable. For applications requiring operation above 250°C, use the Ohmite 810F2R0E or Riedon UAL10-2RF8.