A pyrotechnic charge is a small energetic material designed to ignite or produce a controlled pyrotechnic effect, such as heat, flame, gas, smoke, or pressure. It is a physical component, not a digital one, and it is usually activated by an electrical firing pulse, heat, or another trigger.
In cyber security, the term matters wherever software or electronics can cause physical action. A compromised firing circuit, unsafe control board, or weak interlock can turn a simple command into an irreversible event. Defenders treat these systems as safety-critical: they isolate triggers, verify authorization, test wiring, and design fail-safe states. You will see pyrotechnic charges in hardware security, tamper-response systems, emergency mechanisms, and other devices where a single pulse can produce a one-way physical result.