Equivalent & Substitute Parts for Ohmite 805F2K0

Part Overview

The Ohmite 805F2K0 is a 2 kOhms ±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 system maintenance, repairs, and new designs requiring this specification. The part features aluminum housing with flanged mounting and solder lug termination, suitable for applications requiring precision resistance with moderate power dissipation.

Substiute Parts

805F2K0

OhmiteIn Stock: 987805F2K0 Datasheet

Current PartRFQ

RH0052K000FC02

Vishay DaleIn Stock: 759RH0052K000FC02 Datasheet

DirectRFQ

UAL25-2KF8

RiedonIn Stock: 987UAL25-2KF8 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 805F2K0 is determined by the following critical parameters that must remain constant or be exceeded:

• Resistance Value: 2 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Wirewound (exact match required)
• Temperature Coefficient: ±20ppm/°C (exact match required)
• Housing Type: Aluminum (exact match required)
• Mounting Feature: Flanges (exact match required)
• Lead Style: Solder Lugs (exact match required)
• Power Rating: 5W minimum (equal or greater acceptable)
• Operating Temperature Range: Must encompass or match -55°C ~ 275°C

Two substitute parts meet these criteria with variations in power rating and physical dimensions.

Parameter Comparison

Engineering Selection Recommendations

RH0052K000FC02 (Vishay Dale) serves as a direct dimensional and functional equivalent with increased power rating (7.5W vs. 5W). This part maintains identical footprint dimensions and all critical electrical parameters. The operating temperature range is reduced to -55°C ~ 250°C, which is acceptable for applications not requiring the full 275°C upper limit of the original part. This substitute remains RoHS non-compliant, matching the original part's compliance status. Active product status ensures continued availability.

UAL25-2KF8 (Riedon) provides enhanced power handling (25W) and achieves ROHS3 compliance, making it suitable for applications requiring regulatory compliance. This part maintains the full operating temperature range (-55°C ~ 275°C) and all critical electrical specifications. Physical dimensions are larger (1.063" L x 1.079" W vs. 0.600" L x 0.646" W), requiring verification of available board space and mounting clearance. Active product status and enhanced safety features (Flame Proof, Pulse Withstanding, Safety) provide additional design margin.

Frequently Asked Questions (FAQ)

Q: Can RH0052K000FC02 be used as a direct replacement for 805F2K0?

A: Yes. The RH0052K000FC02 maintains identical resistance (2 kOhms), tolerance (±1%), temperature coefficient (±20ppm/°C), housing type (aluminum), mounting features (flanges), and lead style (solder lugs). The increased power rating (7.5W vs. 5W) provides additional thermal margin. Footprint dimensions are identical. The reduced upper operating temperature limit (250°C vs. 275°C) must be evaluated against application requirements.

Q: What are the physical space implications of using UAL25-2KF8?

A: The UAL25-2KF8 is significantly larger: 1.063" L x 1.079" W x 0.575" H compared to the original 0.600" L x 0.646" W x 0.330" H. Board layout and mounting clearance must be verified before selection. The increased size accommodates the higher power rating (25W) and enhanced safety features.

Q: Does operating temperature range affect substitution compatibility?

A: The RH0052K000FC02 operates to 250°C maximum, compared to 275°C for the original part. Applications requiring operation above 250°C must use the UAL25-2KF8, which maintains the full -55°C ~ 275°C range. For applications with maximum operating temperatures below 250°C, both substitutes are acceptable.

Q: What is the significance of RoHS compliance in these substitutes?

A: The original 805F2K0 is RoHS non-compliant. The RH0052K000FC02 maintains this non-compliant status. The UAL25-2KF8 achieves ROHS3 compliance, making it suitable for applications subject to RoHS regulations or customer requirements mandating compliant components.

Q: Are there electrical performance differences between these parts?

A: All three parts share identical resistance (2 kOhms), tolerance (±1%), and temperature coefficient (±20ppm/°C). Electrical performance is equivalent. The primary differences are power rating, physical dimensions, and compliance certifications.