Bourns 3299 Series Trimmer Potentiometer, 500Ω, 25 Turn

Bourns 3299 Series Trimmer Potentiometer is a multi-turn cermet trimming potentiometer with a 500Ω resistance value and 25 turns of adjustment, designed for through-hole mounting. It is intended for fine circuit adjustments across a range of electronic equipment.

Overview

The Bourns 3299 Series Trimmer features a 3/8-inch square profile and provides 25 turns of adjustment, allowing precise control over resistance values. Its cermet element and top adjust design support stable, repeatable setting of circuit parameters. The device is rated for a rotational life of 200 cycles, making it suitable for applications that require frequent calibration.

Key Features

• Multi-turn trimmer with 25 turns of adjustment
• Cermet element material
• Sealed to an IP65 rating, resistant to dust and water jets
• Rotational life of 200 cycles
• Five terminal styles available
• Standoffs facilitate PC board washing after assembly

Electrical and Environmental Specifications

The trimmer has a resistance value of 500Ω and a tolerance of ±10%. Its power rating is 500mW (0.5W) and its temperature coefficient is ±100ppm/°C. It operates across a temperature range of -55°C to +125°C, and its robust construction and stable cermet element support consistent performance.

Applications

The trimmer is suited to applications demanding accuracy, such as measuring linear distance, angle or rotation within production and test equipment. Its IP65 sealing makes it suitable for use in challenging environments.

Physical Dimensions

The trimmer measures 15 mm (depth) x 33 mm (width) x 43 mm (height) and weighs 1.23 g.