UAL25-1K5F8 Equivalent & Substitute Parts

Part Overview

The UAL25-1K5F8 is a 1.5 kOhms ±1% 25W wirewound chassis mount resistor manufactured by Riedon. This component is designed for applications requiring high power dissipation with tight tolerance specifications and stable performance across extended temperature ranges. The part is currently in active production status with 994 units in stock. Substitute parts become necessary when primary inventory is depleted, when supply chain constraints occur, or when design flexibility allows for functionally equivalent alternatives from different manufacturers.

Substiute Parts

UAL25-1K5F8

RiedonIn Stock: 1048UAL25-1K5F8 Datasheet

Current PartRFQ

KAL25FB1K50

Stackpole Electronics IncIn Stock: 876KAL25FB1K50 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The KAL25FB1K50 manufactured by Stackpole Electronics Inc qualifies as a direct substitute for the UAL25-1K5F8 based on the following critical parameters:

• Identical resistance value: 1.5 kOhms
• Matching tolerance specification: ±1%
• Equivalent power rating: 25W
• Same composition type: Wirewound
• Identical temperature coefficient: ±20ppm/°C
• Matching operating temperature range: -55°C ~ 275°C
• Compatible mounting configuration: Flanges with solder lugs
• Equivalent housing material: Aluminum
• Matching regulatory compliance: ROHS3 Compliant

Physical dimensions are within acceptable manufacturing tolerances (length 26.97mm vs 27.00mm, width 27.43mm vs 27.40mm, height 14.66mm vs 14.60mm), confirming mechanical compatibility in chassis mount applications.

Parameter Comparison

Engineering Selection Recommendations

Both the UAL25-1K5F8 and KAL25FB1K50 are active production components with full regulatory compliance. Selection between these parts should be based on availability and supply chain considerations. Both components meet ROHS3 and REACH requirements, ensuring compliance with current environmental regulations. The dimensional tolerances between the two parts are within standard manufacturing ranges for chassis mount resistors, confirming direct mechanical and electrical interchangeability in circuit applications. No performance degradation is expected when substituting between these two part numbers in equivalent circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the KAL25FB1K50 be used as a direct replacement for the UAL25-1K5F8?

A: Yes. Both parts share identical electrical specifications (1.5 kOhms ±1%, 25W, ±20ppm/°C) and compatible mechanical configurations (aluminum housing, flanged mounting, solder lugs). Physical dimensions are within acceptable tolerances for chassis mount applications.

Q: Are there any differences in operating temperature performance?

A: No. Both components operate across the identical temperature range of -55°C to 275°C with matching temperature coefficients of ±20ppm/°C.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the UAL25-1K5F8 and KAL25FB1K50 are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with matching HTSUS codes.

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by resistance value, tolerance, power rating, temperature coefficient, operating temperature range, composition type, mounting configuration, and housing material. All these parameters are identical between the two parts.

Q: Are there any inventory considerations?

A: The UAL25-1K5F8 has 994 units in stock, while the KAL25FB1K50 has 776 units available. Selection may depend on delivery requirements and supply chain logistics.