UB3C-750RF8 Equivalent & Substitute Parts

Part Overview

The UB3C-750RF8 is a 750 Ohm ±1% 3W 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 1060 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to supply constraints, design flexibility, or application-specific packaging preferences.

Substiute Parts

UB3C-750RF8

RiedonIn Stock: 1143UB3C-750RF8 Datasheet

Current PartRFQ

43F750E

OhmiteIn Stock: 83943F750E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The 43F750E manufactured by Ohmite qualifies as a direct substitute for the UB3C-750RF8 based on the following critical parameters:

• Resistance value: 750 Ohms (identical)
• Tolerance: ±1% (identical)
• Power rating: 3W (identical)
• Composition: Wirewound (identical)
• Package type: Axial (identical)
• Temperature coefficient: ±20ppm/°C (identical)
• Terminations: 2 (identical)
• RoHS compliance: Both parts meet regulatory requirements

The 43F750E operates across an extended temperature range (-55°C to 275°C) compared to the UB3C-750RF8 (-55°C to 250°C), providing additional thermal margin. Physical dimensions differ between the two parts; however, both maintain standard axial package geometry suitable for through-hole PCB mounting.

Parameter Comparison

Engineering Selection Recommendations

Both the UB3C-750RF8 and 43F750E meet identical electrical specifications for 750 Ohm ±1% 3W wirewound resistor applications. Selection between these parts depends on the following factors:

The UB3C-750RF8 is recommended when tape and reel packaging is required for automated assembly processes and when the compact axial geometry (4.00mm diameter) is necessary for space-constrained PCB layouts.

The 43F750E is suitable for applications where bulk packaging is acceptable and the extended operating temperature range (-55°C to 275°C) provides additional thermal headroom. The larger physical dimensions (5.60mm diameter) may require PCB layout verification for clearance compatibility.

Both parts maintain RoHS compliance and unlimited moisture sensitivity rating, ensuring suitability for standard industrial and commercial environments.

Frequently Asked Questions (FAQ)

Q: Can the 43F750E replace the UB3C-750RF8 in existing designs?

A: Yes, provided that PCB layout accommodates the larger physical dimensions of the 43F750E (5.60mm diameter versus 4.00mm diameter). Electrical performance is equivalent across all specified parameters.

Q: What is the significance of the extended temperature range in the 43F750E?

A: The 43F750E operates to 275°C maximum, compared to 250°C for the UB3C-750RF8. This provides additional thermal margin in applications approaching the upper temperature limit, though both parts are suitable for standard operating conditions.

Q: Are there packaging considerations when switching between these parts?

A: Yes. The UB3C-750RF8 is supplied in tape and reel format suitable for pick-and-place assembly. The 43F750E is supplied in bulk packaging, requiring manual handling or alternative assembly processes.

Q: Do both parts meet the same regulatory requirements?

A: Both parts are RoHS compliant and carry unlimited moisture sensitivity rating (MSL 1). The UB3C-750RF8 is ROHS3 compliant, while the 43F750E is RoHS compliant. Both meet EAR99 export classification requirements.

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

A: The primary differences are physical dimensions, packaging format, and maximum operating temperature. Electrical specifications, tolerance, power rating, and composition are identical.