The constant temperature electric soldering iron realizes automatic temperature control through the attraction and separation of soft magnetic materials and magnetic steel. The constant temperature electric soldering iron is generally 45W. It is powered on and off intermittently. The actual power consumption is 25W. It is powered by a 24V transformer and can be used for both AC and DC.

(1) When soldering integrated circuits, transistors and components that are easily damaged by heat, consider using a 20W internal heating or 25W external heating soldering iron.

(2) When welding thicker wires or coaxial cables, consider using a 50W internal heating or 45-75W external heating soldering iron.

(3) When welding larger components, such as the metal chassis grounding lug, a soldering iron of more than 100W should be used.

(4) The shape of the soldering iron tip must adapt to the surface requirements of the parts to be welded and the product assembly density.