Ohmite 810F2K5E Wirewound Chassis Mount Resistor – Equivalent & Substitute Parts

Part Overview

The Ohmite 810F2K5E is a 2.5 kOhms ±1% 10W wirewound chassis mount resistor from the Metal-Mite®89 series. This component is designed for applications requiring precision resistance with high power dissipation capability and stable performance across temperature ranges. The part is currently active in production and RoHS compliant, making it suitable for modern electronic assemblies. Equivalent and substitute parts are identified based on matching electrical specifications (resistance value, tolerance, power rating) and mechanical compatibility (chassis mount configuration, solder lug termination, aluminum housing).

Substiute Parts

810F2K5E

OhmiteIn Stock: 1065810F2K5E Datasheet

Current PartRFQ

RH0102K500FE02

Vishay DaleIn Stock: 1107RH0102K500FE02 Datasheet

DirectRFQ

KAL10FB2K50

Stackpole Electronics IncIn Stock: 1118KAL10FB2K50 Datasheet

UpgradeRFQ

UAL10-2K5F8

RiedonIn Stock: 1160UAL10-2K5F8 Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 810F2K5E are qualified based on the following criteria:

Electrical Compatibility:

• Resistance value: 2.5 kOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Temperature coefficient: ±20ppm/°C (exact match required)
• Composition: Wirewound (required for thermal and electrical performance characteristics)

Mechanical Compatibility:

• Mounting configuration: Flanged chassis mount (required for PCB or chassis integration)
• Lead termination: Solder lugs (required for assembly compatibility)
• Housing material: Aluminum (required for thermal dissipation and mechanical durability)
• Package type: Axial, Box (required for form factor compatibility)

Regulatory & Environmental:

• RoHS compliance status (ROHS3 or equivalent acceptable)
• Moisture sensitivity level (MSL 1 or Not Applicable acceptable)

The substitute parts identified below meet all electrical and mechanical requirements. Power rating variations (10W vs. 12.5W) are noted where applicable, as higher power ratings provide additional thermal margin without affecting circuit functionality.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts (RH0102K500FE02, KAL10FB2K50, UAL10-2K5F8) are functionally equivalent to the 810F2K5E and meet the core electrical and mechanical requirements for direct substitution.

RH0102K500FE02 (Vishay Dale RH Series): This part provides a 12.5W power rating, offering increased thermal margin over the original 10W specification. Operating temperature range extends to 250°C. ROHS3 compliance and moisture-resistant features are documented. This option is suitable for applications requiring enhanced power dissipation capability.

KAL10FB2K50 (Stackpole Electronics KAL Series): This part also provides a 12.5W power rating with an extended operating temperature range of -55°C to 275°C. ROHS3 compliance and moisture-resistant features are documented. Seated height is 10.70mm, slightly higher than the original part. This option is suitable for high-temperature applications.

UAL10-2K5F8 (Riedon UAL Series): This part maintains the original 10W power rating with an extended operating temperature range of -55°C to 275°C. Additional features include current sense capability, flame proof construction, pulse withstanding, and safety certifications. ROHS3 compliance and MSL 1 rating match the original part's environmental specifications. This option is suitable for applications requiring enhanced safety and reliability features.

All parts carry active product status and are available in production quantities. Selection should be based on specific application requirements regarding operating temperature range, power dissipation margin, and feature requirements.

Frequently Asked Questions (FAQ)

Q: Can the RH0102K500FE02 or KAL10FB2K50 (12.5W) be used in place of the 810F2K5E (10W)?

A: Yes. Both parts meet all electrical specifications (2.5 kOhms, ±1%, ±20ppm/°C) and mechanical requirements (chassis mount, solder lugs, aluminum housing). The higher power rating provides additional thermal margin and does not affect circuit functionality. No circuit modifications are required.

Q: What is the difference between the substitute parts?

A: The primary differences are power rating and operating temperature range. RH0102K500FE02 and KAL10FB2K50 offer 12.5W ratings with extended temperature ranges (250°C and 275°C respectively). UAL10-2K5F8 maintains the 10W rating but includes additional safety features (flame proof, pulse withstanding, current sense capability) and extends the temperature range to 275°C. All three maintain the required ±1% tolerance and ±20ppm/°C temperature coefficient.

Q: Are there physical size differences between these parts?

A: Dimensions are similar across all parts. Length and width measurements range from 19.05mm to 19.90mm and 20.30mm to 21.00mm respectively. Seated heights range from 10.29mm to 11.00mm. These minor variations do not affect standard chassis mount applications. Verify mounting hole spacing and clearance in your specific application.

Q: Do all substitute parts meet RoHS requirements?

A: Yes. The original 810F2K5E is RoHS Compliant. All three substitute parts carry ROHS3 Compliant status, which represents the current RoHS standard. All parts are suitable for RoHS-regulated applications.

Q: What is the significance of MSL (Moisture Sensitivity Level) differences?

A: The 810F2K5E and UAL10-2K5F8 carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. RH0102K500FE02 and KAL10FB2K50 carry "Not Applicable" status, indicating these parts do not require moisture sensitivity precautions. Both classifications are acceptable for standard assembly and storage conditions.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided that the application does not impose constraints that would be violated by the substitute part's specifications. Verify that the operating temperature range of the selected substitute meets your application requirements. Confirm that mounting hole spacing and lead configuration are compatible with your PCB or chassis design. All parts use identical solder lug termination and flanged chassis mount configuration.