AHA50AFB-2K5 Equivalent & Substitute Parts

Part Overview

The AHA50AFB-2K5 is a 2.5 kOhms ±1% 50W wirewound chassis mount resistor manufactured by YAGEO in the AHA series. This component is designed for high-power applications requiring precision resistance with stable performance across extended temperature ranges. The part maintains Active product status with 967 units in current inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained within the allowed parameter tolerances for this resistor category.

Substiute Parts

AHA50AFB-2K5

YAGEOIn Stock: 995AHA50AFB-2K5 Datasheet

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850F2K5E

OhmiteIn Stock: 1043850F2K5E Datasheet

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RH0502K500FE02

Vishay DaleIn Stock: 1052RH0502K500FE02 Datasheet

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UAL50-2K5F8

RiedonIn Stock: 1290UAL50-2K5F8 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AHA50AFB-2K5 are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Resistance value: 2.5 kOhms
• Tolerance: ±1%
• Power rating: 50W
• Composition: Wirewound

Mechanical Parameters (Must Match):

• Mounting feature: Flanges
• Lead style: Solder Lugs
• Package type: Axial, Box
• Housing material: Aluminum

Compliance Parameters (Must Match):

• RoHS3 Compliant
• REACH Unaffected
• ECCN: EAR99

All three substitute parts meet these core requirements. Variations in temperature coefficient, operating temperature range, and dimensional tolerances remain within acceptable substitution boundaries for this product category.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts maintain Active product status and full compliance with ROHS3 and REACH requirements. The 850F2K5E (Ohmite Metal-Mite®89 series), RH0502K500FE02 (Vishay Dale RH series), and UAL50-2K5F8 (Riedon UAL series) are electrically and mechanically equivalent to the AHA50AFB-2K5.

The substitute parts demonstrate improved temperature coefficient performance (±20ppm/°C versus ±200ppm/°C), which provides enhanced stability in temperature-sensitive applications. The Ohmite and Riedon options extend the operating temperature range to 275°C, compared to the 250°C maximum of the original part and Vishay Dale equivalent.

Selection between substitutes depends on application-specific requirements regarding temperature stability and operating range. All parts are suitable for direct replacement in circuits designed for the AHA50AFB-2K5 specification.

Frequently Asked Questions (FAQ)

Q: Can the 850F2K5E replace the AHA50AFB-2K5 in all applications?

A: The 850F2K5E meets all core electrical and mechanical specifications. The improved temperature coefficient (±20ppm/°C) and extended operating range (-55°C ~ 275°C) make it suitable for applications requiring the AHA50AFB-2K5. Dimensional variations are within acceptable tolerances for flanged chassis mount configurations.

Q: What is the difference between the substitute parts?

A: All three substitutes share identical resistance, tolerance, power rating, and composition. Differences exist in temperature coefficient performance and maximum operating temperature. The Ohmite and Riedon parts offer ±20ppm/°C stability with 275°C maximum temperature, while the Vishay Dale part provides ±20ppm/°C with 250°C maximum temperature.

Q: Are dimensional differences significant for PCB layout?

A: Dimensional variations between parts are minimal. Length ranges from 1.938" to 1.969", width from 1.140" to 1.156", and height from 0.620" to 0.650". These tolerances are standard for wirewound chassis mount resistors with flanged mounting and do not require layout modifications.

Q: Do all substitute parts maintain the same moisture sensitivity rating?

A: The AHA50AFB-2K5 and UAL50-2K5F8 both carry MSL 1 (Unlimited). The 850F2K5E and RH0502K500FE02 are rated as Not Applicable for MSL, indicating no moisture sensitivity concern for these designs.

Q: Are all parts suitable for high-temperature applications?

A: The Ohmite 850F2K5E and Riedon UAL50-2K5F8 support operation to 275°C, exceeding the original AHA50AFB-2K5 and Vishay Dale RH0502K500FE02 specifications of 250°C. Selection depends on application temperature requirements.