UB3C-1K2F1 Equivalent & Substitute Parts

Part Overview

The UB3C-1K2F1 is a 1.2 kOhms ±1% 3W axial wirewound resistor manufactured by Riedon. This component is designed for through-hole applications requiring current sensing capabilities with enhanced reliability features including flame proof, moisture resistant, pulse withstanding, and safety certifications. The part maintains Active product status with 894 units currently in stock.

Substitute parts are identified when electrical specifications (resistance value, tolerance, power rating, temperature coefficient) and mechanical parameters (package type, termination count) align with the original component, ensuring functional equivalence in circuit applications.

Substiute Parts

UB3C-1K2F1

RiedonIn Stock: 950UB3C-1K2F1 Datasheet

Current PartRFQ

43F1K2E

OhmiteIn Stock: 116243F1K2E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UB3C-1K2F1 is determined by strict equivalence across the following critical parameters:

• Resistance value: 1.2 kOhms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Temperature coefficient: ±20ppm/°C
• Package configuration: Axial
• Termination count: 2
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected

The substitute part 43F1K2E from Ohmite meets all electrical and mechanical requirements for direct substitution in applications where the UB3C-1K2F1 is specified.

Parameter Comparison

Engineering Selection Recommendations

Both the UB3C-1K2F1 and 43F1K2E maintain Active product status and satisfy ROHS3 and REACH compliance requirements. Selection between these components should be based on:

• Physical space constraints: The UB3C-1K2F1 features a smaller diameter (4.00mm vs 5.60mm) and shorter length (8.90mm vs 15.10mm), making it suitable for compact layouts.
• Inventory availability: The 43F1K2E (Ohmite) offers 1088 units in stock compared to 894 units for the UB3C-1K2F1.
• Electrical equivalence: Both components deliver identical electrical performance across all specified parameters.

Frequently Asked Questions (FAQ)

Q: Can the 43F1K2E replace the UB3C-1K2F1 in all applications?

A: Yes, the 43F1K2E is electrically equivalent to the UB3C-1K2F1 across all critical parameters including resistance, tolerance, power rating, temperature coefficient, and composition. Physical dimensions differ; verify PCB layout accommodates the larger package size (5.60mm diameter vs 4.00mm).

Q: What are the key differences between these parts?

A: The primary differences are physical dimensions and manufacturer series designation. The UB3C-1K2F1 (Riedon UB series) is more compact, while the 43F1K2E (Ohmite Ohmicone® 40 series) is larger. Electrical specifications are identical.

Q: Are both parts suitable for current sensing applications?

A: The UB3C-1K2F1 is explicitly specified with current sensing capability. The 43F1K2E provides equivalent electrical performance for current sensing circuits, though this feature is not explicitly documented in the available specifications.

Q: Do these parts require any special handling or storage?

A: Both components have MSL ratings indicating standard handling requirements. The UB3C-1K2F1 has MSL 1 (Unlimited), and the 43F1K2E is Not Applicable, indicating no moisture sensitivity concerns for either part.