Equivalent & Substitute Parts for UB5C-3KF8

Part Overview

The UB5C-3KF8 is a 3 kOhms ±1% 5W through-hole resistor in axial package manufactured by Riedon. This wirewound resistor is designed for current sense applications and features flame proof, moisture resistant, pulse withstanding, and safety certifications. The part is currently active in production with 728 units in stock. Substitute parts are identified to provide alternative sourcing options when the primary part is unavailable or when supply chain optimization is required.

Substiute Parts

UB5C-3KF8

RiedonIn Stock: 759UB5C-3KF8 Datasheet

Current PartRFQ

45F3K0E

OhmiteIn Stock: 100745F3K0E Datasheet

MFR RecommendedRFQ

RS0053K000FE73

Vishay DaleIn Stock: 1496RS0053K000FE73 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UB5C-3KF8 are qualified based on the following electrical and mechanical parameters:

• Resistance value: 3 kOhms
• Tolerance: ±1%
• Power rating: 5W
• Composition: Wirewound
• Package: Axial through-hole
• Temperature coefficient: ±20ppm/°C
• RoHS and REACH compliance status

The identified substitutes maintain these core parameters, ensuring functional equivalence in circuit applications. Dimensional variations in the axial package are acceptable provided the parts fit standard through-hole mounting footprints.

Parameter Comparison

Engineering Selection Recommendations

All three parts meet ROHS3 and REACH compliance requirements, qualifying them for use in regulated applications. The UB5C-3KF8 and RS0053K000FE73 both specify operating temperature ranges, with the Vishay Dale part offering extended lower temperature operation to -65°C compared to the Riedon part at -55°C. The 45F3K0E does not specify an operating temperature range in the provided data.

Dimensional differences exist among the three parts. The UB5C-3KF8 is the smallest at 6.40mm diameter, while the 45F3K0E is the largest at 8.70mm diameter. The RS0053K000FE73 is intermediate at 7.92mm diameter. These dimensional variations may affect board layout and thermal management considerations in space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can the 45F3K0E be used as a direct replacement for the UB5C-3KF8?

A: The 45F3K0E matches all critical electrical parameters: 3 kOhms resistance, ±1% tolerance, 5W power rating, wirewound composition, and ±20ppm/°C temperature coefficient. Both are ROHS3 compliant and REACH unaffected. The primary difference is physical size; the 45F3K0E is larger (8.70mm diameter vs. 6.40mm diameter). Compatibility depends on available board space and thermal requirements.

Q: What are the differences between the RS0053K000FE73 and the UB5C-3KF8?

A: Electrical specifications are identical: 3 kOhms, ±1% tolerance, 5W, wirewound, ±20ppm/°C. The RS0053K000FE73 specifies a lower operating temperature limit of -65°C versus -55°C for the UB5C-3KF8. Physical dimensions differ slightly (7.92mm vs. 6.40mm diameter). The RS0053K000FE73 is specified as moisture resistant.

Q: Are there any feature differences between these parts?

A: The UB5C-3KF8 includes current sense, flame proof, moisture resistant, pulse withstanding, and safety features. The RS0053K000FE73 specifies moisture resistant. The 45F3K0E does not list specific features in the provided data. Feature availability should be verified against application requirements.

Q: Do dimensional differences affect circuit performance?

A: Dimensional differences do not affect electrical performance. All three parts deliver identical resistance, tolerance, power rating, and temperature coefficient. Dimensional variations impact physical board layout, thermal dissipation characteristics, and mechanical fit within enclosures.

Q: Which part should be selected for space-constrained applications?

A: The UB5C-3KF8 is the smallest option at 6.40mm diameter and 12.70mm length, making it suitable for compact designs. The RS0053K000FE73 and 45F3K0E are larger and may not fit in restricted spaces.