UAL25-150RF8 Equivalent & Substitute Parts

Part Overview

The UAL25-150RF8 is a 150 Ohms ±1% 25W wirewound chassis mount resistor manufactured by Riedon in the UAL series. This component is designed for applications requiring precision current sensing, flame-proof operation, and pulse withstanding capability in high-power environments. The part maintains Active product status with full ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical specifications, mechanical dimensions, and compliance certifications align with the original component requirements.

Substiute Parts

UAL25-150RF8

RiedonIn Stock: 1026UAL25-150RF8 Datasheet

Current PartRFQ

825F150E

OhmiteIn Stock: 1080825F150E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 825F150E (Ohmite Metal-Mite®89 series) qualifies as a direct equivalent based on the following critical parameters:

Electrical specifications match exactly: 150 Ohms resistance, ±1% tolerance, 25W power rating, ±20ppm/°C temperature coefficient, and -55°C ~ 275°C operating temperature range. Mechanical compatibility is confirmed through identical composition (wirewound), housing material (aluminum), mounting feature (flanges), and lead style (solder lugs). Physical dimensions remain within acceptable tolerance: length 1.062" vs 1.063", width 1.094" vs 1.079", and height 0.556" vs 0.575". Both components maintain ROHS3 compliance and EAR99 ECCN classification. Packaging differs (Tray vs Bulk), which does not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Both the UAL25-150RF8 and 825F150E are Active status components with full ROHS3 compliance and REACH unaffected certification. Selection between these parts should be based on availability, packaging requirements, and supply chain considerations. The UAL25-150RF8 is available in Bulk packaging with 1013 units in stock, while the 825F150E is supplied in Tray packaging with 1062 units in stock. Dimensional variations are minimal and fall within standard mechanical tolerances for chassis mount applications. Both components satisfy identical electrical and thermal performance requirements for current sensing and high-power pulse withstanding applications.

Frequently Asked Questions (FAQ)

Q: Can 825F150E replace UAL25-150RF8 in existing designs? A: Yes. Both components share identical electrical specifications (150 Ohms ±1%, 25W, ±20ppm/°C), mechanical mounting features (aluminum housing, flanges, solder lugs), and operating temperature range (-55°C ~ 275°C). Dimensional differences are within acceptable mechanical tolerance for chassis mount applications.

Q: What are the key substitution criteria for this resistor category? A: Substitution is valid when resistance value, tolerance, power rating, temperature coefficient, operating temperature range, composition type, housing material, mounting feature, and lead style remain identical. RoHS and compliance certifications must match or exceed the original specification.

Q: Does packaging type affect functional equivalence? A: No. The UAL25-150RF8 (Bulk) and 825F150E (Tray) are functionally equivalent. Packaging differences relate only to order quantity and handling, not component performance or compatibility.

Q: Are there dimensional concerns when substituting these parts? A: Dimensional variations are minimal. Length differs by 0.001" (0.02mm), width by 0.015" (0.39mm), and height by 0.019" (0.48mm). These tolerances are standard for chassis mount resistors and do not affect PCB layout or thermal performance.

Q: What compliance certifications apply to both parts? A: Both components are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. Both maintain the same HTSUS commodity code (8533.29.0000).