SM-3 Missile

Full Specifications

SM-3 Missile: U.S. Ballistic Missile Defense Interceptor

The Standard Missile-3 (SM-3) is a U.S. Navy ballistic missile defense interceptor designed to destroy incoming ballistic missile threats outside the atmosphere. Unlike conventional missiles that rely on explosive warheads, the SM-3 uses a kinetic kill vehicle to collide directly with the target during the midcourse phase of flight. It forms a major part of the Aegis Ballistic Missile Defense system and can be launched from ships or land-based Aegis Ashore installations.

Manufacturer

The SM-3 is produced by Raytheon, an RTX business, with the program developed through cooperation between the U.S. government and allied partners. The Block IIA variant was jointly developed by the United States and Japan and incorporates larger rocket motors and an enhanced kinetic warhead.

Speed and Range

Open-source estimates place SM-3 Block IA and IB speeds at about 3.0 km/s, while Block IIA reaches approximately 4.5 km/s. Published estimates give ranges of about 700 km for earlier variants and up to 2,500 km for Block IIA. Exact performance figures can vary by variant and engagement conditions, and some detailed parameters remain classified.

Cost/Price

SM-3 pricing varies by production lot, configuration, support, and associated equipment. As a historical reference, the Government Accountability Office reported a Block IIA program unit cost of approximately $39 million in fiscal year 2017. More recent contracts are generally reported at the program or production-lot level rather than as a simple public unit price.

Key Capabilities

The SM-3 uses a solid-fuel, multi-stage propulsion system, inertial and command guidance, infrared sensing, and hit-to-kill technology. It is compatible with the Mk 41 Vertical Launching System aboard Aegis-equipped ships and at Aegis Ashore sites.