Because the snubber capacitor has the   ability to absorb the peak voltage, it has a huge application market as a circuit protection measure.   As a special capacitor, its internal structure is still different from ordinary capacitors, and it is mainly used to protect circuits. Introducing so much, do you understand what is the function of snubber capacitor? What are the structural characteristics of the snubber capacitor?

Structural characteristics of snubber capacitors
The double-sided metallized film inner column structure, special internal design and end-face spraying technology enable the capacitor   to have a low inductance and multi-lead design, which can withstand higher ripple current, high du/dv and high overpressure capability.   Sudden wave absorption of a kind of IGBT buffer line, various high-frequency resonance circuits.

Capacitor structure: double-layer metallized film, internal series structure
Packing: Flame-retardant plastic case, epoxy resin encapsulation, in line with ($literal) standard.
Size: Suitable for all kinds of igbt protection.

Absorb the influence of capacitor
In the snubber circuit and its components, the bus inductance and stray inductance have a great influence on the igbt circuit, especially the high-power igbt circuit. So We hope it becomes smaller and better. In order to reduce these inductances, we need to start from many aspects.
First, the DC bus should be as short as possible;
Secondly, the buffer circuit should be as close as possible to the module;
It uses low-inductance polypropylene non-polar capacitors, fast snubber diodes matched with IGBTs, and resistance to inductive discharge;
Other effective measures. At present, there are many ways to make the snubber circuit: useful discrete components are connected, the connection is through the printed version, and the more useful snubber capacitor module is directly installed on the IGBT module. Obviously, the last way is to meet the reduction measures of the second and third sense of the absorbing capacitor, so the best buffer effect is to maximize the safe operation of the IGBT.