Equivalent & Substitute Parts for Ohmite 850F2R0

Part Overview

The Ohmite 850F2R0 is a 2 Ohms ±1% 50W wirewound chassis mount resistor from the Metal-Mite®89 series. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing applications and new designs. The part features aluminum housing with flanged mounting and solder lug termination, suitable for high-power applications requiring precision resistance values and thermal stability across extended temperature ranges.

Substiute Parts

850F2R0

OhmiteIn Stock: 1039850F2R0 Datasheet

Current PartRFQ

850F2R0E

OhmiteIn Stock: 1248850F2R0E Datasheet

DirectRFQ

RH0502R000FC02

Vishay DaleIn Stock: 1231RH0502R000FC02 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 850F2R0 is determined by strict equivalence across the following critical parameters:

• Resistance value: 2 Ohms
• Tolerance: ±1%
• Power rating: 50W
• Composition: Wirewound
• Temperature coefficient: ±50ppm/°C
• Housing material: Aluminum
• Mounting configuration: Flanged
• Termination style: Solder lugs
• Package format: Axial, Box

Two substitute parts meet these criteria: the Ohmite 850F2R0E and the Vishay Dale RH0502R000FC02. Both maintain identical electrical specifications and mechanical compatibility with the original part.

Parameter Comparison

Engineering Selection Recommendations

The Ohmite 850F2R0E is the primary substitute for the obsolete 850F2R0. Both parts are manufactured by Ohmite and share identical electrical and mechanical specifications. The 850F2R0E carries active product status and achieves ROHS3 compliance, making it suitable for applications with regulatory requirements. Inventory availability is confirmed at 1149 pieces.

The Vishay Dale RH0502R000FC02 provides an alternative cross-manufacturer substitute with equivalent electrical performance and mechanical compatibility. This part maintains active status and includes moisture-resistant features. The maximum operating temperature is limited to 250°C compared to 275°C for the Ohmite variants. REACH status is listed as affected, requiring compliance verification for specific applications. Inventory availability is confirmed at 1140 pieces.

Frequently Asked Questions (FAQ)

Q: Can the 850F2R0E directly replace the obsolete 850F2R0?

A: Yes. The 850F2R0E maintains identical resistance, tolerance, power rating, temperature coefficient, and mechanical dimensions. The primary difference is product status (active versus obsolete) and improved RoHS3 compliance.

Q: What is the maximum operating temperature difference between substitutes?

A: The Ohmite 850F2R0E operates to 275°C, matching the original 850F2R0. The Vishay Dale RH0502R000FC02 operates to 250°C maximum. Applications requiring operation above 250°C must use the Ohmite variant.

Q: Are there dimensional differences between the main part and substitutes?

A: The Ohmite 850F2R0E shares identical dimensions with the 850F2R0 (1.938" L x 1.156" W, 0.620" height). The Vishay Dale RH0502R000FC02 has minor dimensional variations (1.968" L x 1.140" W, 0.625" height) within typical mechanical tolerance ranges for flanged chassis mount resistors.

Q: Which substitute is recommended for new designs?

A: Selection depends on regulatory and environmental requirements. For RoHS3 compliance, use the Ohmite 850F2R0E. For applications requiring moisture resistance, the Vishay Dale RH0502R000FC02 includes this feature. Verify REACH compliance requirements for your specific application.

Q: Are packaging differences significant?

A: Both substitutes are supplied in bulk packaging. The original 850F2R0 was supplied with standard packaging. Bulk packaging does not affect electrical or mechanical performance.