AHA50AFB-50R Equivalent & Substitute Parts

Part Overview

The AHA50AFB-50R is a 50 Ohm ±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 aluminum housing and flanged mounting. The part is currently active in production with 972 units in stock. Equivalent and substitute parts are necessary to ensure design flexibility, manage supply chain continuity, and accommodate specific application requirements such as temperature performance or compliance certifications.

Substiute Parts

AHA50AFB-50R

YAGEOIn Stock: 1024AHA50AFB-50R Datasheet

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850F50RE

OhmiteIn Stock: 860850F50RE Datasheet

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KAL50FB50R0

Stackpole Electronics IncIn Stock: 822KAL50FB50R0 Datasheet

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TMC05050R00FE02

Vishay DaleIn Stock: 1118TMC05050R00FE02 Datasheet

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UAL50-50RF8

RiedonIn Stock: 1335UAL50-50RF8 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the AHA50AFB-50R is determined by strict equivalence across the following critical parameters: resistance value (50 Ohms), tolerance (±1%), power rating (50W), composition (wirewound), housing material (aluminum), mounting feature (flanges), lead style (solder lugs), and package type (axial, box). All substitute parts listed maintain these core electrical and mechanical specifications. Secondary parameters including temperature coefficient, operating temperature range, and specific features may vary within acceptable engineering tolerances but do not prevent functional substitution. All substitute parts maintain ROHS3 compliance and are active products with confirmed inventory availability.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are active products with confirmed ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and commercial applications. The TMC05050R00FE02 (Vishay Dale) offers the highest current inventory at 1025 units and maintains the same operating temperature range as the primary part (-55°C ~ 250°C). The UAL50-50RF8 (Riedon) provides the largest inventory reserve at 1295 units and extends the upper operating temperature to 275°C, with additional features including current sense, flame proof, and pulse withstanding capabilities. The 850F50RE (Ohmite) and KAL50FB50R0 (Stackpole) both support extended temperature operation to 275°C with improved temperature coefficient performance (±20ppm/°C versus ±200ppm/°C). Selection should be based on specific application requirements regarding temperature stability, operating range, and feature requirements rather than availability alone.

Frequently Asked Questions (FAQ)

Q: Can the AHA50AFB-50R be directly replaced with any of the listed substitutes?

A: Yes. All listed parts maintain identical electrical specifications (50 Ohms ±1% at 50W) and mechanical compatibility (aluminum housing, flanged mounting, solder lugs, axial box package). Direct substitution is electrically and mechanically valid.

Q: What is the primary difference between the AHA50AFB-50R and its substitutes?

A: The main difference is temperature coefficient performance. The AHA50AFB-50R has a temperature coefficient of ±200ppm/°C, while all substitute parts offer improved stability at ±20ppm/°C. Additionally, substitute parts extend the upper operating temperature limit to 275°C compared to 250°C for the primary part.

Q: Are there dimensional differences between these parts?

A: Dimensions are nearly identical across all parts. Length ranges from 1.938" to 1.969" (49.23mm to 50.00mm), width from 1.140" to 1.156" (28.96mm to 29.36mm), and height from 0.620" to 0.650" (15.75mm to 16.50mm). These minor variations do not affect standard PCB or chassis mounting applications.

Q: Which substitute offers the best temperature stability?

A: All substitute parts (850F50RE, KAL50FB50R0, TMC05050R00FE02, and UAL50-50RF8) provide superior temperature coefficient performance at ±20ppm/°C compared to the primary part's ±200ppm/°C, representing a 10-fold improvement in temperature stability.

Q: Do all parts meet the same compliance standards?

A: All parts are ROHS3 compliant and REACH unaffected. The TMC05050R00FE02 shows REACH status as vendor undefined; however, this does not affect substitution eligibility for applications requiring ROHS3 compliance.

Q: Which substitute has the highest inventory availability?

A: The UAL50-50RF8 (Riedon) has the highest inventory at 1295 units, followed by TMC05050R00FE02 (Vishay Dale) at 1025 units.