The Sedlbauer toroidal core transformer 858740 features an input of 1 x 230 V and outputs 2 x 18 V AC with a power rating of 300 VA and current capacity of 8.33 A. Its compact dimensions are 122mm in diameter and 62mm in height, making it suitable for various compact applications. Typically used in automation systems and halogen lighting, it is valued for its efficient power supply and reduced electromagnetic interference.