bezpiecznik bedeutet auf Englisch

backstop▼noun
thing or a person to support

binding▼noun
item holding things tightly together

circuit breaker▼noun
high-current electrical switch

fail-safe▼noun
device or mechanism

fuse▼noun
device igniting charge

fuse▼noun
device preventing overloading of a circuit

safeguard▼noun
something that serves as a guard or protection; a defense