3214W-1-502E – BOURNS

Overview

The Bourns 3214W-1-502E is a 5 kΩ cermet trimmer potentiometer designed for precise resistance adjustment in electronic circuits. Its 0.25W power rating and ±10% tolerance are standard for many calibration tasks, but its critical operational characteristic lies in its 5.0 turns adjustment mechanism, enabling fine-tuning of voltage dividers or bias points. A key design consideration for surface-mount trimmers like this is the potential for solder joint fatigue under thermal cycling; engineers must carefully manage PCB layout and reflow profiles to ensure long-term mechanical integrity, especially in high-vibration environments.

Key Features

• Resistance: 5 kOhms
• Power Rating: 0.25W (1/4W)
• Tolerance: ±10%
• Adjustment: 5.0 Turns, Top Adjustment
• Termination: J Lead Surface Mount
• Dimensions: 4.80mm x 3.50mm face

Applications

The component is engineered for deployment in systems requiring high reliability and performance under specific operating conditions. It provides functional stability across the stated design envelope.

• Calibration of sensor signal conditioning circuits
• Fine adjustment of gain stages in audio amplifiers
• Setting quiescent current in power supply regulation loops
• Initial setup of bias voltages in discrete transistor circuits