UAL10-25RF8 Equivalent & Substitute Parts

Part Overview

The UAL10-25RF8 is a 25 Ohms ±1% 10W wirewound chassis mount resistor manufactured by Riedon. This component is designed for current sensing applications requiring high precision and pulse withstanding capability. The part is Active status and widely used in industrial and power electronics applications where reliable current measurement and thermal management are critical.

Substitute parts become necessary when the primary part experiences supply constraints, extended lead times, or when design requirements allow for compatible alternatives with enhanced specifications. The TMC01025R00FE02 from Vishay Dale serves as a direct functional equivalent with improved power rating and comparable electrical characteristics.

Substiute Parts

UAL10-25RF8

RiedonIn Stock: 900UAL10-25RF8 Datasheet

Current PartRFQ

TMC01025R00FE02

Vishay DaleIn Stock: 889TMC01025R00FE02 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The TMC01025R00FE02 qualifies as a direct substitute based on the following critical parameters:

• Resistance Value: Both parts are 25 Ohms with identical ±1% tolerance
• Composition & Construction: Both are wirewound resistors with aluminum housing and flange-mounted design
• Temperature Coefficient: Identical ±20ppm/°C specification ensures equivalent thermal stability
• Lead Style: Both use solder lugs for identical mounting compatibility
• Regulatory Compliance: Both are ROHS3 compliant and REACH unaffected
• Physical Dimensions: Dimensions are within acceptable tolerance (0.750"-0.752" L × 0.800"-0.799" W)

The substitute part offers enhanced power dissipation capability (12.5W versus 10W), making it suitable for applications where the original part is specified or where additional thermal margin is beneficial.

Parameter Comparison

Engineering Selection Recommendations

Both the UAL10-25RF8 and TMC01025R00FE02 are Active status components with full ROHS3 compliance and REACH unaffected certification, making them suitable for regulated applications. The TMC01025R00FE02 provides a higher power rating (12.5W) while maintaining identical electrical characteristics, offering improved thermal headroom in current sensing circuits. Selection between these parts should be based on availability, supply chain requirements, and thermal design margins specific to the application. Both parts meet the same regulatory and compliance standards required for industrial electronics.

Frequently Asked Questions (FAQ)

Q: Can the TMC01025R00FE02 be used as a direct replacement for the UAL10-25RF8?

A: Yes. Both parts share identical resistance value (25 Ohms ±1%), temperature coefficient (±20ppm/°C), composition (wirewound), and mounting configuration (flanges with solder lugs). The substitute offers higher power dissipation capability.

Q: What is the difference in operating temperature range?

A: The UAL10-25RF8 operates from -55°C to 275°C, while the TMC01025R00FE02 operates from -55°C to 250°C. For applications requiring operation above 250°C, the original part is required.

Q: Are the physical dimensions compatible?

A: Yes. Dimensions are within acceptable tolerance: UAL10-25RF8 is 0.752" L × 0.799" W, and TMC01025R00FE02 is 0.750" L × 0.800" W. Both mount identically using flanges and solder lugs.

Q: Do both parts meet the same compliance standards?

A: Yes. Both are ROHS3 compliant, REACH unaffected, and carry identical ECCN (EAR99) and HTSUS (8533.21.0080) classifications.

Q: What advantage does the higher power rating provide?

A: The TMC01025R00FE02's 12.5W rating versus the UAL10-25RF8's 10W rating allows for greater thermal margin in current sensing applications, reducing component stress and extending operational life in high-current circuits.