810F2K5 Equivalent & Substitute Parts

Part Overview

The Ohmite 810F2K5 is a 2.5 kOhms ±1% 10W wirewound chassis mount resistor with aluminum housing and solder lug termination. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. The Metal-Mite®89 series resistor operates across -55°C to 275°C and is suitable for applications requiring precision wirewound performance in compact chassis-mounted configurations.

Substiute Parts

810F2K5

OhmiteIn Stock: 1113810F2K5 Datasheet

Current PartRFQ

810F2K5E

OhmiteIn Stock: 1065810F2K5E Datasheet

DirectRFQ

KAL10FB2K50

Stackpole Electronics IncIn Stock: 1118KAL10FB2K50 Datasheet

DirectRFQ

RH0102K500FC02

Vishay DaleIn Stock: 781RH0102K500FC02 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 810F2K5 is determined by the following critical parameters: resistance value (2.5 kOhms), tolerance (±1%), composition (wirewound), temperature coefficient (±20ppm/°C), housing type (aluminum), mounting feature (flanges), and lead style (solder lugs). Power rating may be equal or higher without affecting compatibility. Operating temperature range and physical dimensions are secondary considerations for mechanical fit and thermal performance. All identified substitutes maintain these core electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The 810F2K5E from Ohmite is the direct active equivalent, maintaining identical electrical specifications (10W, 2.5 kOhms, ±1%) while offering RoHS compliance and active product status. This part is the primary choice for direct replacement in new designs and obsolescence mitigation.

The KAL10FB2K50 from Stackpole Electronics and RH0102K500FC02 from Vishay Dale both provide higher power ratings (12.5W) with identical resistance, tolerance, and temperature coefficient. These parts are suitable for applications where increased thermal margin is beneficial. The Stackpole KAL10FB2K50 offers ROHS3 compliance and moisture-resistant features. The Vishay Dale RH0102K500FC02 maintains non-compliant status consistent with the original part but provides active availability.

Physical dimensions vary slightly across substitutes. The 810F2K5E exhibits the largest height (11.00mm), while the RH0102K500FC02 is the most compact (10.29mm). Mechanical fit verification is required for space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the 810F2K5E directly replace the obsolete 810F2K5?

A: Yes. The 810F2K5E maintains identical electrical specifications (2.5 kOhms, ±1%, 10W, ±20ppm/°C) and mechanical configuration (aluminum housing, flanges, solder lugs). The primary difference is active product status and RoHS compliance. Physical dimensions differ slightly (height: 11.00mm vs. 10.16mm), requiring verification of available mounting space.

Q: What is the difference between 10W and 12.5W power ratings?

A: The KAL10FB2K50 and RH0102K500FC02 provide 12.5W ratings compared to the original 10W specification. Higher power ratings indicate greater thermal dissipation capability without affecting electrical performance. These parts are suitable for applications where thermal margin is desired, provided mechanical fit accommodates the potentially larger physical envelope.

Q: Are there RoHS compliance differences among substitutes?

A: Yes. The 810F2K5E is RoHS compliant, the KAL10FB2K50 is ROHS3 compliant, and the RH0102K500FC02 is non-compliant. Selection depends on regulatory requirements for the end application.

Q: Do physical dimensions affect substitution compatibility?

A: Yes. All substitutes maintain the same mounting flange configuration but exhibit minor dimensional variations. The 810F2K5E (11.00mm height) and KAL10FB2K50 (10.70mm height) are slightly taller than the original (10.16mm). The RH0102K500FC02 (10.29mm height) is closest to original dimensions. Mechanical fit verification is required for space-constrained chassis designs.

Q: What is the operating temperature range for each substitute?

A: The 810F2K5 and KAL10FB2K50 operate across -55°C to 275°C. The RH0102K500FC02 operates across -55°C to 250°C. The 810F2K5E does not specify an operating temperature range in available documentation. Applications requiring operation above 250°C should use the 810F2K5 or KAL10FB2K50.