UB5C-1KF8 Equivalent & Substitute Parts

Part Overview

The UB5C-1KF8 is a 1 kOhm ±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 maintains Active product status with 1964 units in current inventory. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the allowed parameter range.

Substiute Parts

UB5C-1KF8

RiedonIn Stock: 1998UB5C-1KF8 Datasheet

Current PartRFQ

45F1K0E

OhmiteIn Stock: 69345F1K0E Datasheet

MFR RecommendedRFQ

WHE1K0FET

OhmiteIn Stock: 1652WHE1K0FET Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB5C-1KF8 is determined by strict equivalence across the following parameters:

• Resistance value: 1 kOhms
• Tolerance: ±1%
• Power rating: 5W
• Composition: Wirewound
• Package: Axial
• Temperature coefficient: ±20ppm/°C
• Number of terminations: 2

The identified substitute parts (45F1K0E and WHE1K0FET) maintain all core electrical specifications. Variations in physical dimensions, operating temperature upper limits, and packaging format (Bulk vs. Cut Tape) do not affect functional substitution within the specified parameter constraints.

Parameter Comparison

Engineering Selection Recommendations

Both substitute parts maintain Active product status and meet RoHS compliance requirements. The 45F1K0E (Ohmite, Series 40) extends the operating temperature range to 275°C, providing additional thermal margin for high-temperature applications. The WHE1K0FET (Ohmite, Series WH) operates within a -55°C ~ 150°C range and is available in Cut Tape packaging, matching the original UB5C-1KF8 packaging format.

Selection between substitutes depends on application thermal requirements and supply chain packaging preferences. Both parts satisfy the core electrical and mechanical specifications required for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can the 45F1K0E replace the UB5C-1KF8 in all applications?

A: Yes, provided the application operating temperature does not exceed 250°C. The 45F1K0E supports temperatures up to 275°C, making it suitable for all UB5C-1KF8 applications. Physical dimensions differ (0.343" Dia x 0.937" L vs. 0.250" Dia x 0.500" L), requiring verification of PCB layout clearance.

Q: What is the difference between Cut Tape and Bulk packaging?

A: Cut Tape (CT) packaging provides individual component strips suitable for automated pick-and-place assembly. Bulk packaging contains loose components. The UB5C-1KF8 and WHE1K0FET both use Cut Tape format, while the 45F1K0E uses Bulk packaging. Packaging selection depends on assembly process requirements.

Q: Are all three parts RoHS compliant?

A: The UB5C-1KF8 and WHE1K0FET are ROHS3 Compliant. The 45F1K0E is RoHS Compliant. Both compliance levels satisfy RoHS requirements for electronic component manufacturing.

Q: What is the significance of the ±20ppm/°C temperature coefficient?

A: The temperature coefficient indicates resistance value drift with temperature change. All three parts maintain identical ±20ppm/°C specifications, ensuring consistent performance across the operating temperature range.

Q: Can physical dimension differences affect circuit performance?

A: Physical dimensions do not affect electrical performance. However, larger dimensions (45F1K0E: 0.343" Dia x 0.937" L) require verification of available PCB space and component clearance during layout design.