Which item is NOT a component of an IED?

• A. Power source
• B. Initiator
• C. Main charge
• D. Detonator

Answer: (D)

In this context, an IED is described by three functional elements: the main charge that acts as the explosive payload, the initiator that starts the explosive reaction, and the power source that supplies the energy to run the system. The detonator is often treated as part of the initiation system or considered another term for the initiating device, depending on the training material. Because initiation devices are what actually trigger the main charge, many security-focused definitions do not list detonator as a separate, standalone component. Therefore, the item not counted as a distinct component is the detonator. The power source provides energy to the system, the initiator begins the sequence, and the main charge is the payload, so those are the clearly separate elements.