UAL5-1RF8 Equivalent & Substitute Parts

Part Overview

The UAL5-1RF8 is a 1 Ohm ±1% 7.5W wirewound chassis mount resistor manufactured by Riedon, designed for current sensing applications requiring high precision and power dissipation capability. This Active product features aluminum housing with flanged mounting and operates across -55°C to 275°C. Substitute parts become necessary when addressing supply chain constraints, regional availability, or specific compliance requirements while maintaining identical electrical and mechanical performance.

Key Parameters

Parameter	Value
Resistance	1 Ohms
Tolerance	±1%
Power Rating	7.5W
Composition	Wirewound
Temperature Coefficient	±50ppm/°C
Operating Temperature Range	-55°C ~ 275°C
Mounting Feature	Flanges
Lead Style	Solder Lugs
Housing Type	Aluminum
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

The TMC0051R000FE02 (Vishay Dale) qualifies as a direct substitute based on the following critical parameters:

Resistance value: 1 Ohms (identical)
Tolerance: ±1% (identical)
Power rating: 7.5W (identical)
Composition: Wirewound (identical)
Temperature coefficient: ±50ppm/°C (identical)
Mounting feature: Flanges (identical)
Lead style: Solder Lugs (identical)
Housing type: Aluminum (identical)
Package type: Axial, Box (identical)
RoHS compliance: ROHS3 Compliant (identical)

Substitution is valid where operating temperature requirements do not exceed 250°C, as the TMC0051R000FE02 operates to -55°C ~ 250°C versus the UAL5-1RF8's -55°C ~ 275°C maximum.

Parameter Comparison

Parameter	UAL5-1RF8 (Riedon)	TMC0051R000FE02 (Vishay Dale)
Resistance	1 Ohms	1 Ohms
Tolerance	±1%	±1%
Power (Watts)	7.5W	7.5W
Composition	Wirewound	Wirewound
Temperature Coefficient	±50ppm/°C	±50ppm/°C
Operating Temperature	-55°C ~ 275°C	-55°C ~ 250°C
Mounting Feature	Flanges	Flanges
Lead Style	Solder Lugs	Solder Lugs
Housing Type	Aluminum	Aluminum
Size / Dimension	0.598" L x 0.646" W (15.20mm x 16.40mm)	0.600" L x 0.646" W (15.24mm x 16.41mm)
Height - Seated (Max)	0.335" (8.50mm)	0.335" (8.51mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active

Engineering Selection Recommendations

Both the UAL5-1RF8 and TMC0051R000FE02 maintain Active product status and ROHS3 compliance. Selection between these parts depends on operating temperature requirements:

Use UAL5-1RF8 for applications requiring operation up to 275°C
Use TMC0051R000FE02 where maximum operating temperature does not exceed 250°C

Physical dimensions are equivalent within manufacturing tolerances (±0.002" variation), and both employ identical electrical specifications for current sensing applications. Both parts carry EAR99 ECCN classification and identical HTSUS codes.

Frequently Asked Questions (FAQ)

Q: Can TMC0051R000FE02 replace UAL5-1RF8 in all applications?

A: TMC0051R000FE02 is a direct substitute provided the application does not require operation above 250°C. The UAL5-1RF8 supports higher temperature operation to 275°C.

Q: Are the physical dimensions compatible for PCB mounting?

A: Yes. Both parts feature flanged mounting with solder lugs and dimensions within 0.002" of each other. Mechanical fit is equivalent.

Q: Do both parts meet the same compliance standards?

A: Yes. Both are ROHS3 compliant, carry EAR99 ECCN classification, and share identical HTSUS codes (8533.21.0080).

Q: What is the tolerance specification for these resistors?

A: Both parts maintain ±1% tolerance with ±50ppm/°C temperature coefficient, suitable for precision current sensing circuits.

Q: Are there differences in packaging or lead configuration?

A: No. Both parts use identical Axial, Box packaging with solder lug lead style and aluminum housing with flanges.

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