UB5C-68RF8 Equivalent & Substitute Parts

Part Overview

The UB5C-68RF8 is a 68 Ohm ±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 with 791 units in stock. Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and compliance certifications align with the original component requirements.

Substiute Parts

UB5C-68RF8

RiedonIn Stock: 846UB5C-68RF8 Datasheet

Current PartRFQ

45F68RE

OhmiteIn Stock: 69745F68RE Datasheet

MFR RecommendedRFQ

RS00568R00FE73

Vishay DaleIn Stock: 1424RS00568R00FE73 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB5C-68RF8 is determined by strict alignment of the following parameters:

• Resistance value: 68 Ohms
• Tolerance: ±1%
• Power rating: 5W
• Composition: Wirewound
• Package type: Axial (two-terminal through-hole)
• Temperature coefficient: ±20ppm/°C
• Operating temperature range: minimum -55°C, maximum 250°C or higher
• Termination count: 2

Both identified substitute parts meet these core electrical and mechanical criteria. Physical dimensions may vary within the axial package category without affecting functional compatibility in standard PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

All three components meet the core electrical specifications for 68 Ohm ±1% 5W axial wirewound resistor applications. Selection between UB5C-68RF8, 45F68RE, and RS00568R00FE73 should be based on the following factors:

Compliance and Certification: UB5C-68RF8 and RS00568R00FE73 are both ROHS3 compliant with REACH Unaffected status. The 45F68RE is RoHS compliant with vendor-undefined REACH status.

Temperature Range: RS00568R00FE73 extends the lower operating limit to -65°C, compared to -55°C for both UB5C-68RF8 and 45F68RE. The 45F68RE offers an upper limit of 275°C versus 250°C for the other two parts.

Packaging and Availability: UB5C-68RF8 is supplied in Tape & Reel format with 791 units in stock. RS00568R00FE73 is available in Cut Tape format with 1350 units in stock. 45F68RE is supplied in Bulk packaging with 666 units in stock.

Physical Dimensions: Component size varies across the three options. PCB layout constraints may influence selection if specific mounting clearances are required.

Frequently Asked Questions (FAQ)

Q: Can 45F68RE directly replace UB5C-68RF8?

A: Yes. Both components share identical electrical specifications: 68 Ohms ±1%, 5W power rating, wirewound composition, ±20ppm/°C temperature coefficient, and axial two-terminal package. Physical dimensions differ, but both are standard axial packages suitable for through-hole PCB mounting. Packaging format differs (Bulk vs. Tape & Reel).

Q: What are the temperature range differences between substitutes?

A: UB5C-68RF8 operates from -55°C to 250°C. RS00568R00FE73 extends the lower limit to -65°C while maintaining the 250°C upper limit. 45F68RE operates from -55°C to 275°C, offering a higher maximum temperature. Selection depends on application thermal requirements.

Q: Are all three parts RoHS compliant?

A: UB5C-68RF8 and RS00568R00FE73 are ROHS3 compliant. 45F68RE is RoHS compliant. All three meet RoHS requirements for lead-free applications.

Q: Do physical dimension differences affect PCB compatibility?

A: Axial resistors with different diameters and lengths may require layout adjustments. UB5C-68RF8 is the smallest (6.40mm x 12.70mm), followed by RS00568R00FE73 (7.92mm x 22.23mm), and 45F68RE (8.70mm x 23.80mm). Verify PCB hole spacing and clearance requirements before substitution.

Q: Which substitute offers the best inventory availability?

A: RS00568R00FE73 has the highest stock level at 1350 units, followed by UB5C-68RF8 at 791 units, and 45F68RE at 666 units.

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

A: Yes. All three components are wirewound 68 Ohm ±1% 5W axial resistors with identical temperature coefficients, suitable for current sensing circuit implementations. Electrical performance is equivalent across all three parts.