UB5C-25RF8 Equivalent & Substitute Parts

Part Overview

The UB5C-25RF8 is a 25 Ohm, 1% tolerance, 5W axial wirewound resistor manufactured by Riedon. This component is designed for through-hole applications requiring current sensing functionality with enhanced reliability features including flame proof, moisture resistant, pulse withstanding, and safety certifications. The part is currently in active production status with 794 units in stock. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory compliance can be maintained across alternative manufacturers.

Substiute Parts

UB5C-25RF8

RiedonIn Stock: 839UB5C-25RF8 Datasheet

Current PartRFQ

45F25RE

OhmiteIn Stock: 120345F25RE Datasheet

MFR RecommendedRFQ

RS00525R00FE73

Vishay DaleIn Stock: 1167RS00525R00FE73 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB5C-25RF8 is determined by strict equivalence across the following parameters:

• Resistance value: 25 Ohms
• Tolerance: ±1%
• Power rating: 5W
• Composition: Wirewound
• Package: Axial through-hole
• Temperature coefficient: ±20ppm/°C
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

Both identified substitute parts meet these core electrical and mechanical requirements. Dimensional variations exist within the axial package category but do not affect functional interchangeability in standard through-hole circuit board layouts.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain active production status and full regulatory compliance under ROHS3 and REACH standards. Selection between the UB5C-25RF8 and its substitutes should be based on:

• Physical space constraints: The UB5C-25RF8 offers the smallest footprint (6.40mm diameter, 12.70mm length), while the 45F25RE is the largest (8.70mm diameter, 23.80mm length). The RS00525R00FE73 provides an intermediate size option.
• Packaging format requirements: The UB5C-25RF8 is supplied in Tape & Reel format; the 45F25RE in Bulk; the RS00525R00FE73 in Cut Tape format.
• Feature set: The UB5C-25RF8 includes current sense, flame proof, moisture resistant, pulse withstanding, and safety features. The RS00525R00FE73 includes moisture resistant features. The 45F25RE does not specify additional features beyond standard wirewound construction.
• Operating temperature range: The UB5C-25RF8 operates from -55°C to 250°C. The RS00525R00FE73 operates from -65°C to 250°C, providing extended low-temperature capability. The 45F25RE does not specify an operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the 45F25RE directly replace the UB5C-25RF8 in my circuit?

A: The 45F25RE is electrically equivalent with matching resistance, tolerance, power rating, and temperature coefficient. However, its larger physical dimensions (8.70mm diameter vs. 6.40mm) may require board layout verification to ensure clearance in confined spaces.

Q: What is the difference between the RS00525R00FE73 and UB5C-25RF8?

A: Both parts are electrically identical across all specified parameters. The RS00525R00FE73 extends the operating temperature range to -65°C (versus -55°C minimum for the UB5C-25RF8) and includes moisture resistant features. Physical dimensions differ slightly: 7.92mm diameter and 22.23mm length versus 6.40mm diameter and 12.70mm length.

Q: Are all three parts suitable for current sensing applications?

A: The UB5C-25RF8 is explicitly specified for current sense applications. The 45F25RE and RS00525R00FE73 are standard wirewound resistors without specific current sense designation. Application suitability depends on circuit requirements beyond the component specifications provided.

Q: What packaging formats are available?

A: The UB5C-25RF8 is supplied in Tape & Reel format. The 45F25RE is available in Bulk packaging. The RS00525R00FE73 is supplied in Cut Tape format. Selection should align with assembly process requirements.

Q: Do all substitutes meet the same regulatory requirements?

A: Yes. All three parts are ROHS3 Compliant and REACH Unaffected, meeting equivalent regulatory standards for electronic component use.