BOURNS 3386 Series Cermet Trimmer Potentiometer, 1MΩ, Top Adjust

The BOURNS 3386 Series comprises high-quality, single-turn cermet trimming potentiometers designed for precise circuit adjustments in a wide array of electronic equipment. These through-hole mount trimmers are renowned for their reliability and stability, making them a preferred choice for prototyping, development, and production applications where accurate voltage division or resistance setting is crucial.

Constructed with a durable cermet element, these potentiometers offer excellent long-term performance. They are available in both top-adjust and side-adjust configurations to suit different PCB layout and accessibility requirements. The specified model features a top-adjust type, allowing for easy calibration from above the board.

Key Features & Performance

• Wide Resistance Range: Offers a broad selection from 10 ohm to 2Mohm, with this unit providing a 1MΩ (1 Megohm) track resistance.
• Stable Operation: Features a temperature coefficient (TCR) of ±100ppm/°C and operates reliably across an extensive temperature range from -55°C to +125°C.
• Robust Construction: Rated for 0.5W (500mW) power and a rotational life of 200 cycles, ensuring dependable performance over repeated adjustments.
• Precise Tolerance: Delivers a resistance tolerance of ±10% for consistent circuit behaviour.

Design & Mounting

The trimmer utilises a standard 3/8 inch square footprint for through-hole PCB mounting. Optional accessories, such as a finger-adjust knob or an extended shaft with a cross-slot rotor, are available to facilitate easier manual adjustment during testing or end-user calibration.

With its combination of a robust cermet element, precise electrical characteristics, and versatile physical design, the BOURNS 3386 Series Trimmer Potentiometer is an essential component for engineers seeking dependable trimmer performance in demanding electronic environments.