The S-400 Triumf, designated by NATO as SA-21 Growler, is a mobile surface-to-air missile (SAM) system originating from Russia’s NPO Almaz in the 1990s as an advanced version of the S-300 family, initially known as the S-300 PMU-3; it officially entered service on April 28, 2007, with its first operational battalion commencing combat duty on August 6, 2007, and is intended to be succeeded by the S-500 system.

Some additional information

Designer— Almaz-Antey

Manufacturer  — Fakel Machine-Building Design Bureau

Unit cost 🤑🤑
Domestic: ~US$500 million for a battery and reserve missiles.
Export: US$1–1.25 billion for a battery and reserve missiles (2021)[

Engion type

Engine
YaMZ-8424.10 diesel V12
400 hp (300 kW)

Operational
range
400 km (250 mi) – 40N6E missile[3]
150 km (93 mi) – 48N6(E) missile
200 km (120 mi) – 48N6M(E2) missile
240 km (150 mi) – 48N6DM(E3) missile
40 km (25 mi) – 9M96 missile
120 km (75 mi) – 9M96M(E2) missile