Fail-safe detonation system

The MJOLNIR Powered Assault Armor is equipped with a fail-safe detonation system. Once a Spartan is killed or wounded fatally, the self-destruct protocol will have to be enacted by either themselves or a nearby Spartan. This is done to avoid capture of the suit and/or the wearer for identification or technological study.

Function
The tiny access panel at the back of the suit is opened to activate the protocol, it is activated by typing several digits only Spartans know. Once activated, a fifteen-second countdown timer starts. Once it hits zero, the suit's fusion reactor overloads and burns everything in its path in a ten-meter radius with a follow-up explosion to finish anything alive.

Trivia
The Master Chief is the only known Spartan to activate the fail-safe detonation system (on Grace-093's suit after she was killed by a Brute in the Covenant resupply station Unyielding Hierophant).

List of appearances

 * Halo: First Strike