AHA50AFB-6R Equivalent & Substitute Parts

Part Overview

The AHA50AFB-6R is a 6 Ohms ±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 thermal characteristics. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified for applications where component availability, lead time, or specific performance characteristics necessitate alternative sourcing options.

Key Parameters

Parameter	Value
Resistance	6 Ohms
Tolerance	±1%
Power Rating	50W
Composition	Wirewound
Operating Temperature Range	-55°C ~ 250°C
Mounting Feature	Flanges
Lead Style	Solder Lugs
Housing Type	Aluminum
Package Type	Axial, Box
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the AHA50AFB-6R is determined by strict equivalence across the following critical parameters: resistance value (6 Ohms), tolerance (±1%), power rating (50W), composition (wirewound), mounting feature (flanges), lead style (solder lugs), housing type (aluminum), and package configuration (axial, box). All identified substitute parts meet these core electrical and mechanical specifications. Temperature coefficient variations and extended operating temperature ranges do not disqualify substitution but represent performance enhancements in specific applications. Compliance certifications (ROHS3, REACH, ECCN) are maintained across all substitute options.

Parameter Comparison

Parameter	AHA50AFB-6R (YAGEO)	TMC0506R000FE02 (Vishay Dale)	RH0506R000FE02 (Vishay Dale)	UAL50-6RF8 (Riedon)
Resistance	6 Ohms	6 Ohms	6 Ohms	6 Ohms
Tolerance	±1%	±1%	±1%	±1%
Power (Watts)	50W	50W	50W	50W
Composition	Wirewound	Wirewound	Wirewound	Wirewound
Temperature Coefficient	±200ppm/°C	±50ppm/°C	±50ppm/°C	±50ppm/°C
Operating Temperature	-55°C ~ 250°C	-55°C ~ 250°C	-55°C ~ 250°C	-55°C ~ 275°C
Coating, Housing Type	Aluminum	Aluminum	Aluminum	Aluminum
Mounting Feature	Flanges	Flanges	Flanges	Flanges
Size / Dimension	1.969" L x 1.142" W (50.00mm x 29.00mm)	1.968" L x 1.140" W (49.99mm x 28.96mm)	1.968" L x 1.140" W (49.99mm x 28.96mm)	1.969" L x 1.142" W (50.00mm x 29.00mm)
Height - Seated (Max)	0.650" (16.50mm)	0.625" (15.87mm)	0.625" (15.87mm)	0.630" (16.00mm)
Lead Style	Solder Lugs	Solder Lugs	Solder Lugs	Solder Lugs
Package / Case	Axial, Box	Axial, Box	Axial, Box	Axial, Box
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	Vendor Undefined	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

All three substitute parts—TMC0506R000FE02, RH0506R000FE02, and UAL50-6RF8—are functionally equivalent to the AHA50AFB-6R for applications requiring 6 Ohms ±1% 50W wirewound chassis mount resistors. All parts maintain ROHS3 compliance and REACH unaffected or vendor-undefined status.

TMC0506R000FE02 and RH0506R000FE02 are Vishay Dale products with improved temperature coefficient performance (±50ppm/°C versus ±200ppm/°C) and moisture-resistant features. These parts are suitable for precision applications where thermal stability is critical. Dimensional variations are minimal, with seated heights of 0.625" compared to the original 0.650".

UAL50-6RF8 from Riedon provides extended operating temperature range (-55°C ~ 275°C) and additional safety features including current sense, flame proof, pulse withstanding, and safety certifications. Dimensional compatibility is closest to the original part, with seated height of 0.630". This option is appropriate for high-reliability applications requiring enhanced thermal performance and safety ratings.

Frequently Asked Questions (FAQ)

Q: Can TMC0506R000FE02 or RH0506R000FE02 be used as direct replacements for AHA50AFB-6R?

A: Yes. Both Vishay Dale parts meet all core electrical specifications (6 Ohms ±1%, 50W, wirewound) and mechanical requirements (flanges, solder lugs, aluminum housing, axial box package). Seated height differences (0.625" versus 0.650") must be verified against PCB layout constraints.

Q: What is the significance of temperature coefficient differences?

A: The AHA50AFB-6R has a temperature coefficient of ±200ppm/°C, while substitute parts from Vishay Dale and Riedon specify ±50ppm/°C. Lower temperature coefficients indicate greater resistance stability across temperature variations, beneficial for precision measurement and control circuits.

Q: Is UAL50-6RF8 suitable for applications requiring extended temperature operation?

A: Yes. The UAL50-6RF8 operates to 275°C maximum, compared to 250°C for the original part and other substitutes. This extended range is applicable to high-temperature industrial and automotive environments.

Q: Are there dimensional compatibility concerns with substitute parts?

A: Dimensional variations are minor. TMC0506R000FE02 and RH0506R000FE02 have slightly reduced seated height (0.625" versus 0.650"). UAL50-6RF8 maintains near-identical dimensions to the original. PCB layout and thermal management design should be reviewed to confirm accommodation of these variations.

Q: Do all substitute parts maintain the same compliance certifications?

A: All parts are ROHS3 compliant. REACH status is REACH Unaffected for AHA50AFB-6R, RH0506R000FE02, and UAL50-6RF8. TMC0506R000FE02 lists REACH status as Vendor Undefined. ECCN classification (EAR99) and HTSUS code (8533.29.0000) are consistent across all parts.

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