UB5C-100RF8 Equivalent & Substitute Parts

Part Overview

The UB5C-100RF8 is a 100 Ohms ±1% 5W axial wirewound resistor manufactured by Riedon. This through-hole component is designed for current sensing applications and features flame proof, moisture resistant, and pulse withstanding characteristics. The part is currently active in production and maintains full RoHS3 compliance. Substitute parts are identified when original inventory is unavailable or when equivalent electrical and mechanical specifications are required for system continuity.

Substiute Parts

UB5C-100RF8

RiedonIn Stock: 1005UB5C-100RF8 Datasheet

Current PartRFQ

45F100E

OhmiteIn Stock: 177045F100E Datasheet

MFR RecommendedRFQ

RS005100R0FE73

Vishay DaleIn Stock: 3144RS005100R0FE73 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UB5C-100RF8 are qualified based on the following electrical and mechanical parameters:

Resistance value must be 100 Ohms with ±1% tolerance. Power rating must be 5W minimum. Composition must be wirewound. Package configuration must be axial with two terminations. Temperature coefficient must be ±20ppm/°C. Operating temperature range must support the application requirements. RoHS3 compliance is mandatory. All substitute parts meet these criteria and are functionally interchangeable in circuit applications requiring these specifications.

Parameter Comparison

Engineering Selection Recommendations

All three parts meet the core electrical specifications for 100 Ohm 5W axial wirewound resistor applications. The UB5C-100RF8, 45F100E, and RS005100R0FE73 are functionally equivalent for circuit substitution purposes.

The UB5C-100RF8 provides specified operating temperature range of -55°C ~ 250°C with current sensing, flame proof, and moisture resistant features. The 45F100E (Ohmite Ohmicone® 40 series) meets all electrical parameters with ROHS3 compliance. The RS005100R0FE73 (Vishay Dale RS series) extends the lower operating temperature to -65°C and includes moisture resistant characteristics.

Selection between these parts should be based on packaging availability, lead time requirements, and specific application environmental conditions. All parts maintain ROHS3 compliance and REACH unaffected status.

Frequently Asked Questions (FAQ)

Q: Can the 45F100E replace the UB5C-100RF8 in all applications?

A: Yes, the 45F100E meets all core electrical specifications: 100 Ohms ±1%, 5W power rating, wirewound composition, axial package, ±20ppm/°C temperature coefficient, and ROHS3 compliance. Physical dimensions differ (0.343" Dia x 0.937" L versus 0.250" Dia x 0.500" L), so PCB layout and mechanical clearance must be verified.

Q: What is the difference between the RS005100R0FE73 and UB5C-100RF8?

A: Both parts are electrically equivalent with identical resistance, tolerance, power rating, and temperature coefficient. The RS005100R0FE73 operates from -65°C to 250°C, providing extended low-temperature capability compared to the UB5C-100RF8 (-55°C to 250°C). Physical dimensions also differ: RS005100R0FE73 is 0.312" Dia x 0.875" L.

Q: Are there packaging differences between these substitute parts?

A: Yes. The UB5C-100RF8 is supplied in Tape & Reel (TR) packaging. The 45F100E is supplied in Bulk packaging. The RS005100R0FE73 is supplied in Cut Tape (CT) packaging. Packaging selection affects procurement, handling, and assembly processes.

Q: Do all substitute parts have the same moisture resistance rating?

A: The UB5C-100RF8 and RS005100R0FE73 both feature moisture resistant characteristics. The 45F100E does not list moisture resistant as a specified feature. For applications requiring moisture resistance, the UB5C-100RF8 or RS005100R0FE73 are preferred.

Q: Can these parts be used interchangeably in current sensing circuits?

A: The UB5C-100RF8 is specifically designed for current sensing applications. The 45F100E and RS005100R0FE73 are general-purpose wirewound resistors meeting the same electrical specifications. Functional interchangeability depends on circuit requirements beyond basic resistance and power rating specifications.