Ohmite 810F200 Equivalent & Substitute Parts

Part Overview

The Ohmite 810F200 is a 200 Ohms ±1% 10W wirewound chassis mount resistor designed for applications requiring precision resistance with high power dissipation capability. This component features aluminum housing with flanged mounting and solder lug termination, suitable for fixed installation in electronic equipment.

The 810F200 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Substiute Parts

810F200

OhmiteIn Stock: 1067810F200 Datasheet

Current PartRFQ

UAL25-200RF8

RiedonIn Stock: 1559UAL25-200RF8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Ohmite 810F200 is determined by the following critical parameters:

• Resistance value: 200 Ohms (exact match required)
• Tolerance: ±1% (precision specification)
• Composition: Wirewound (electrical performance characteristic)
• Temperature coefficient: ±20ppm/°C (stability requirement)
• Operating temperature range: -55°C to 275°C (environmental specification)
• Mounting feature: Flanges (mechanical interface requirement)
• Lead style: Solder Lugs (termination compatibility)
• Housing type: Aluminum (thermal and mechanical properties)

The Riedon UAL25-200RF8 qualifies as a substitute part because it maintains all critical electrical parameters and mechanical mounting characteristics. The primary difference is an increased power rating (25W versus 10W), which provides enhanced thermal capability while maintaining full compatibility with the original specification envelope.

Parameter Comparison

Engineering Selection Recommendations

The Riedon UAL25-200RF8 is the qualified substitute for the Ohmite 810F200. Selection is based on the following factors:

• All critical electrical parameters match exactly: resistance, tolerance, temperature coefficient, and operating temperature range
• Mechanical mounting interface is identical: flanged aluminum housing with solder lug termination
• The increased power rating (25W) provides design margin and does not compromise compatibility
• The substitute part carries active product status, ensuring ongoing availability and supply chain support
• The Riedon UAL25-200RF8 meets ROHS3 compliance requirements, whereas the original part is non-compliant

For applications where the original 10W specification is a strict design constraint, physical space limitations due to the larger package dimensions (1.063" L x 1.079" W versus 0.750" L x 0.812" W) must be evaluated during integration.

Frequently Asked Questions (FAQ)

Q: Can the Riedon UAL25-200RF8 be used as a direct replacement for the Ohmite 810F200?

A: Yes. The substitute part maintains identical electrical specifications (200 Ohms ±1%, ±20ppm/°C, -55°C to 275°C operating range) and mechanical mounting interface (flanged aluminum housing, solder lug termination). The increased power rating provides additional thermal capability without affecting circuit performance.

Q: What are the physical differences between these parts?

A: The Riedon UAL25-200RF8 is larger: 1.063" L x 1.079" W x 0.575" H (seated) compared to the Ohmite 810F200 at 0.750" L x 0.812" W x 0.400" H (seated). Verify available mounting space before substitution.

Q: Does the higher power rating affect circuit operation?

A: No. The 25W rating of the substitute part is a thermal capability specification. It does not alter resistance value, tolerance, temperature coefficient, or electrical behavior in the circuit. The part will operate identically to the original 10W component.

Q: What is the compliance difference between these parts?

A: The Ohmite 810F200 is RoHS non-compliant. The Riedon UAL25-200RF8 is ROHS3 compliant. For applications subject to RoHS requirements, the substitute part satisfies regulatory obligations.

Q: Are there any packaging differences?

A: Both parts use solder lug termination and flanged mounting. The Riedon part is supplied in bulk packaging, whereas the original Ohmite part packaging details are not specified. Verify packaging requirements for your procurement process.