UB3C-900RF8 Equivalent & Substitute Parts

Part Overview

The UB3C-900RF8 is a 900 Ohm ±1% 3W axial wirewound resistor manufactured by Riedon. This component is designed for through-hole applications requiring current sensing functionality with enhanced reliability features including flame proof, moisture resistant, and pulse withstanding characteristics. The part is currently active in production with 1022 units in stock. Alternative components may be required due to supply constraints, lead time considerations, or specific packaging requirements for your application.

Substiute Parts

UB3C-900RF8

RiedonIn Stock: 1088UB3C-900RF8 Datasheet

Current PartRFQ

43F900E

OhmiteIn Stock: 127743F900E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 43F900E from Ohmite qualifies as a direct substitute for the UB3C-900RF8 based on the following critical electrical and mechanical parameters:

Matching Parameters:

• Resistance value: 900 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package type: Axial
• Temperature coefficient: ±20ppm/°C
• Terminations: 2
• Moisture sensitivity level: 1 (Unlimited)
• RoHS compliance status: Both compliant

Dimensional Difference: The 43F900E has larger physical dimensions (0.220" Dia x 0.594" L versus 0.157" Dia x 0.350" L). This difference must be evaluated against your PCB layout and mechanical constraints before selection.

Parameter Comparison

Engineering Selection Recommendations

The 43F900E is electrically and functionally equivalent to the UB3C-900RF8 for applications requiring 900 Ohm ±1% 3W axial wirewound resistors. Both components meet RoHS compliance requirements and share identical electrical specifications including resistance, tolerance, power rating, and temperature coefficient.

Selection between these parts should be based on:

• PCB Layout Compatibility: The UB3C-900RF8 is physically smaller and may be preferred for space-constrained designs. The 43F900E requires additional board space due to its larger diameter and length.
• Packaging Format: The UB3C-900RF8 is supplied in Tape & Reel format suitable for automated assembly. The 43F900E is supplied in bulk packaging, which may require manual handling or reel conversion.
• Supply Availability: Both components are currently in stock with comparable inventory levels.
• Feature Set: The UB3C-900RF8 includes additional features (current sense, flame proof, pulse withstanding, safety) not specified for the 43F900E. Verify that these features are not required for your application before substituting.

Frequently Asked Questions (FAQ)

Q: Can the 43F900E be used as a direct replacement for the UB3C-900RF8?

A: The 43F900E is electrically equivalent and shares all critical electrical parameters. However, the larger physical dimensions require verification that your PCB layout can accommodate the increased size. Additionally, confirm that the absence of current sense and flame proof features in the 43F900E does not impact your application requirements.

Q: What is the primary difference between these two parts?

A: The main differences are physical dimensions and packaging format. The UB3C-900RF8 is smaller (4.00mm x 8.90mm) and supplied in Tape & Reel, while the 43F900E is larger (5.60mm x 15.10mm) and supplied in bulk. Electrically, both are 900 Ohm ±1% 3W wirewound resistors with identical temperature coefficients.

Q: Are both parts RoHS compliant?

A: Yes. The UB3C-900RF8 is ROHS3 compliant, and the 43F900E is RoHS compliant. Both meet environmental compliance standards for lead-free manufacturing.

Q: Does the packaging format affect component performance?

A: No. Tape & Reel and bulk packaging formats do not affect electrical performance. The packaging format is a logistics and assembly consideration only. Tape & Reel is optimized for automated pick-and-place assembly, while bulk packaging is suitable for manual assembly or reel conversion processes.

Q: What should I verify before substituting the 43F900E for the UB3C-900RF8?

A: Verify PCB layout clearance for the larger dimensions, confirm that current sense and flame proof features are not required for your circuit, and ensure your assembly process can accommodate bulk packaging if applicable.