By In May 2025, as Pakistan launched a barrage of missiles and drones targeting Indian cities like Jammu, Pathankot, and Amritsar, India’s newly operational S-400 Triumf systems sprang into action. It is also known as “Sudarshan Chakra” in Hindi by the Indian military after Lord Vishnu’s indestructible weapon. The S-400 intercepted every incoming threat, marking its combat debut with flawless precision.
What Makes the S-400 Air Defence System Unique?
Unrivalled Technical Prowess
- Multi-Layered Defence: The S-400 integrates four missile types to create a “bubble” of protection against jets, drones, and ballistic missiles.
- 40N6: 400 km
- 48N6: 250 km
- 9M96E2: 120 km
- 9M96E: 40 km
- Lightning Speed: Missiles travel at Mach 14 (17,000 km/h), outpacing rivals like the US Patriot (Mach 4.1).
- 360° Surveillance: Its 91N6E “Big Bird” radar detects threats 600 km away, while the 92N6E “Grave Stone” guides missiles with pinpoint accuracy.
Tactical Flexibility
- Rapid Deployment: Ready in 5 minutes (vs. 25 minutes for the Patriot) and mounted on mobile trucks for quick relocation.
- Electronic Warfare Resilience: Advanced jamming resistance – it tracks stealth aircraft like China’s J-20.
S-400 Air Defence System – Operation Sindoor (2025)
During the India-Pakistan conflict, the S-400:
- Neutralised 15+ Pakistani missiles targeting military installations.
- Protected critical cities (e.g., Pathankot, Siliguri Corridor) by enforcing a 400-km no-fly zone over Pakistan.
- Enabled offensive strikes by securing Indian airspace, it freed up resources for India’s retaliatory strikes on terror camps.
Geopolitical Impact of S-400 Air Defence System
Deterrence Against China & Pakistan
- China: The S-400’s range covers Chinese airbases in Tibet, complicating the People’s Liberation Army Air Force’s operations in China.
- Pakistan: S-400 renders Pakistani JF-17 jets and drones vulnerable, forcing reliance on costly ballistic missiles.
US-India Tensions
- CAATSA Sanctions Risk: India’s $5.4B deal with Russia angered the USA, but strategic ties with Washington softened the blow.
Limitations & Challenges of S-400 Air Defence System
- Hypersonic Gap: This gap struggles against next-generation hypersonic glide vehicles.
- Costly Maintenance: Each squadron costs $1.25B, straining defence budgets.
- Integration Hurdles: These hurdles sync with India’s mix of Russian, Israeli, and indigenous systems (e.g., Akash, Barak-8) is a complex process.
Way Forward
- Project Kusha: DRDO’s indigenous 350-km Surface to Air Missile System (to rival S-400) by 2028.
- Multi-Tier Defence: Pairing S-400 with short-range Spyder missiles and anti-drone systems to plug gaps.
Conclusion
The S-400 isn’t just a missile system—it’s a strategic equaliser for India. While it can’t single-handedly win wars, its ability to deny airspace to adversaries has reshaped South Asia’s military calculus. As India balances this Russian import with homegrown projects like Kusha, the message is clear: The Sudarshan Chakra isn’t just defending borders; it’s securing India’s future as a regional power.