AHA50AFB-5R 50W Wirewound Chassis Mount Resistor - Equivalent & Substitute Parts

Part Overview

The AHA50AFB-5R is a 5 Ohm ±1% 50W wirewound chassis mount resistor manufactured by YAGEO. This component is classified as Active product status and is designed for applications requiring high power dissipation with precision resistance values in a compact flanged aluminum housing. Substitute parts become necessary when the primary manufacturer part is unavailable, when supply chain optimization is required, or when design flexibility allows for alternative qualified components meeting identical electrical and mechanical specifications.

Substiute Parts

AHA50AFB-5R

YAGEOIn Stock: 1195AHA50AFB-5R Datasheet

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KAL50FB5R00

Stackpole Electronics IncIn Stock: 2266KAL50FB5R00 Datasheet

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RH0505R000FE02

Vishay DaleIn Stock: 1266RH0505R000FE02 Datasheet

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UAL50-5RF8

RiedonIn Stock: 1479UAL50-5RF8 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AHA50AFB-5R are qualified based on the following mandatory electrical and mechanical parameters:

• Resistance value: 5 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 50W (exact match required)
• Composition: Wirewound (exact match required)
• Mounting feature: Flanges (exact match required)
• Lead style: Solder Lugs (exact match required)
• Housing type: Aluminum (exact match required)
• Package/Case: Axial, Box (exact match required)
• RoHS compliance: ROHS3 Compliant (exact match required)

All substitute parts listed meet these core criteria. Variations in temperature coefficient, maximum operating temperature, and additional features do not disqualify substitution when the primary electrical and mechanical specifications are identical.

Parameter Comparison

Engineering Selection Recommendations

All four parts listed—AHA50AFB-5R, KAL50FB5R00, RH0505R000FE02, and UAL50-5RF8—are Active product status components with ROHS3 compliance and REACH Unaffected designation. Selection among these parts is determined by availability and application-specific requirements within the allowed parameter ranges.

The KAL50FB5R00 and UAL50-5RF8 offer extended maximum operating temperature to 275°C compared to the AHA50AFB-5R and RH0505R000FE02 at 250°C. The KAL50FB5R00 and RH0505R000FE02 feature moisture-resistant construction. The UAL50-5RF8 includes current sense, flame proof, pulse withstanding, and safety features. All parts maintain identical core electrical specifications: 5 Ohms ±1% at 50W with wirewound composition, flanged aluminum housing, and solder lug termination.

Dimensional variations are minimal across all substitutes, with height differences not exceeding 0.025" (0.63mm), ensuring compatibility in standard chassis mount applications. Temperature coefficient differences (±200ppm/°C for AHA50AFB-5R versus ±50ppm/°C for substitutes) reflect manufacturing process variations and do not affect substitution eligibility when primary electrical parameters are matched.

Frequently Asked Questions (FAQ)

Q: Can KAL50FB5R00 directly replace AHA50AFB-5R in all applications?

A: Yes. Both parts meet identical core specifications: 5 Ohms ±1%, 50W, wirewound composition, flanged aluminum housing, and solder lug termination. The KAL50FB5R00 offers extended operating temperature range (-55°C to 275°C versus -55°C to 250°C) and moisture-resistant features, making it suitable for the same applications and additional high-temperature environments.

Q: What is the significance of temperature coefficient differences between parts?

A: Temperature coefficient indicates resistance value drift with temperature change. The AHA50AFB-5R has ±200ppm/°C while substitutes have ±50ppm/°C. This means substitute parts maintain more stable resistance values across temperature variations. For applications requiring high precision across temperature ranges, the lower temperature coefficient of substitutes provides improved performance.

Q: Are dimensional differences between parts critical for PCB or chassis mounting?

A: Dimensional variations are minimal. Maximum height difference is 0.025" (0.63mm) across all parts. All maintain identical flange mounting features and solder lug termination. Verify mounting hole spacing and clearance in your specific application, as all parts are designed for standard chassis mount configurations.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All parts are ROHS3 Compliant, REACH Unaffected, and classified under ECCN EAR99. Compliance status is identical across AHA50AFB-5R, KAL50FB5R00, RH0505R000FE02, and UAL50-5RF8.

Q: Which substitute part should be selected for high-temperature applications?

A: KAL50FB5R00 and UAL50-5RF8 both support -55°C to 275°C operating range, compared to 250°C maximum for AHA50AFB-5R and RH0505R000FE02. Selection between these two depends on additional feature requirements: KAL50FB5R00 emphasizes moisture resistance, while UAL50-5RF8 includes current sense, flame proof, and pulse withstanding capabilities.

Q: Is inventory availability a factor in part selection?

A: Inventory levels are provided for reference: AHA50AFB-5R (1142 pcs), KAL50FB5R00 (2163 pcs), RH0505R000FE02 (1159 pcs), and UAL50-5RF8 (1442 pcs). All parts are available in quantity. Selection should prioritize electrical and mechanical compatibility first, with inventory as a secondary consideration.