What is typically considered the main charge of an IED?

The main charge of an improvised explosive device (IED) is indeed the part that creates the blast pressure. This component is crucial because it is the explosive material that undergoes a rapid chemical reaction, producing a significant amount of gas and heat in a very short time. This sudden expansion of gases generates the pressure wave that is responsible for the destructive effects associated with an explosion, such as shrapnel and concussive force, which can cause injuries or damage to nearby persons and structures.

The other components of an IED, such as the power source, container, and switch, play important roles in the overall functionality of the device. However, they do not directly contribute to the explosion itself. The power source provides energy to the device, facilitating the detonation, while the container is designed to hold the explosive charge and direct the blast effects. The switch, meanwhile, is used to activate the device, initiating the explosive reaction. Thus, while all these components are integral to the operation of an IED, it is the main charge that is primarily responsible for the explosion and its impact.