This part is a kind of semiconductor called 3329H.

Function of this product has Circularity/ Single Turn /Trimming Potentiometer.

Manufacturers : DB Lectro

Image and pinout :

Some of the text within the PDF file :

DB LECTRO Inc. 6.8×4.7 Circularity/ Single Turn /Trimming Potentiometer -- 3329H-...Install dimension Electrical Characteristics Standard Resistance Range.50Ω～ 2MΩ Resistance Tolerance...±10% Absolute Minimum Resistance..≤1%R或 10Ω ...Mutual dimension Contact Resistance VariationCRV≤3% Insulation Resistance...R1≥1GΩ (100Vac) Withstand Voltage..500Vac Effective Travel...280° Environmental Characteristics Power Rating, 300 volts max ..0.25W@70℃,0W@125℃ Temperature Range.-55℃～ 125℃ [ ... ]

3329H PDF Datasheet Download