UAL25-12RF8 Equivalent & Substitute Parts

Part Overview

The UAL25-12RF8 is a 12 Ohms ±1% 25W wirewound chassis mount resistor manufactured by Riedon. This component is designed for applications requiring precision current sensing with high power dissipation capability. The part is currently in active production status with 1,058 units in stock. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications align with the original component requirements.

Substiute Parts

UAL25-12RF8

RiedonIn Stock: 1153UAL25-12RF8 Datasheet

Current PartRFQ

RH02512R00FE02

Vishay DaleIn Stock: 1005RH02512R00FE02 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UAL25-12RF8 is determined by strict alignment of the following parameters:

• Resistance value: 12 Ohms
• Tolerance: ±1%
• Power rating: 25W
• Composition: Wirewound
• Temperature coefficient: ±20ppm/°C
• Housing type: Aluminum with flanges
• Lead style: Solder lugs
• RoHS compliance: ROHS3 Compliant
• Mechanical compatibility: Dimensions within acceptable tolerance for chassis mount installation

The RH02512R00FE02 (Vishay Dale) meets all critical electrical and mechanical parameters required for direct substitution in the UAL25-12RF8 application.

Parameter Comparison

Engineering Selection Recommendations

Both the UAL25-12RF8 and RH02512R00FE02 are active production components with ROHS3 compliance and REACH unaffected status. The RH02512R00FE02 operates within a maximum temperature range of -55°C to 250°C, which is 25°C lower than the UAL25-12RF8 specification of -55°C to 275°C. Selection between these parts depends on the application's maximum operating temperature requirement. For applications operating above 250°C, the UAL25-12RF8 is the appropriate choice. For applications within the -55°C to 250°C range, either part is suitable based on availability and procurement requirements.

Frequently Asked Questions (FAQ)

Q: What makes the RH02512R00FE02 a valid substitute for the UAL25-12RF8?

A: Both components share identical electrical specifications (12 Ohms ±1%, 25W, ±20ppm/°C temperature coefficient), identical composition (wirewound), identical housing type (aluminum with flanges), and identical lead style (solder lugs). Mechanical dimensions are within acceptable tolerance for chassis mount installation. Both are ROHS3 compliant and REACH unaffected.

Q: Are there dimensional differences between these parts?

A: Yes. The UAL25-12RF8 measures 1.063" L x 1.079" W with a maximum seated height of 0.575", while the RH02512R00FE02 measures 1.062" L x 1.080" W with a maximum seated height of 0.561". These differences are minimal and do not affect mechanical compatibility in standard chassis mount applications.

Q: What is the temperature range difference, and does it matter?

A: The UAL25-12RF8 operates from -55°C to 275°C, while the RH02512R00FE02 operates from -55°C to 250°C. The 25°C difference in maximum operating temperature is significant only for applications requiring sustained operation above 250°C. Verify your application's maximum operating temperature requirement before selection.

Q: Are both parts available in the same packaging?

A: Both parts are supplied in bulk packaging with solder lugs for direct chassis mount installation. No packaging conversion is required for substitution.

Q: Do compliance certifications differ between these parts?

A: No. Both components are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. Compliance status is identical.