The RB-2 tube arrester is a vintage Soviet-era device that was commonly used as a surge protector for electrical equipment. The RB-2 tube arrester was designed to protect electronic equipment from high-voltage surges and spikes that could potentially damage or destroy the sensitive components inside.

The RB-2 tube arrester consists of a glass bulb that contains a ceramic insulator and two electrodes. The electrodes are made of a special material that is designed to quickly conduct electricity when a high-voltage surge is detected. This allows the RB-2 tube arrester to divert the excess current away from the protected equipment and safely dissipate it.

The RB-2 tube arrester was commonly used in a variety of Soviet-era electronic devices, including radios, televisions, and other consumer electronics. Despite being an older technology, the RB-2 tube arrester is still regarded as a highly effective and reliable surge protector.

Today, vintage RB-2 tube arresters are often sought after by collectors of vintage electronics and radio equipment, as they represent an interesting piece of Soviet-era technology and a unique part of electrical engineering history.