Briz (rocket stage)

Briz-KM
Models of Briz-M (left) and Briz-KM (right) at the 2013 Paris Air Show
ManufacturerKhrunichev
Country of originRussia
General characteristics
Diameter2.5 m (8 ft 2 in)
Length2.6 m (8 ft 6 in)
Gross mass6,475 kg (14,275 lb)
Propellant mass5,055 kg (11,144 lb)
Engine details
Powered by1 × S5.98M
Maximum thrust19.6 kN (4,400 lbf)
Specific impulse326 s (3.20 km/s)
Burn time3,000 seconds
PropellantN2O4 / UDMH
Briz-M
ManufacturerKhrunichev
Country of originRussia
General characteristics
Diameter4.1 m (13 ft)
Length2.61 m (8 ft 7 in)
Gross mass22,500 kg (49,600 lb)
Propellant mass20,000 kg (44,000 lb)
Engine details
Powered by1 × S5.98M
Maximum thrust19.6 kN (4,400 lbf)
Specific impulse326 s (3.20 km/s)
PropellantN2O4 / UDMH

The Briz-K, Briz-KM and Briz-M (Russian: Бриз-К, КM and M meaning Breeze-K, KM and M) are Russian liquid-propellant rocket orbit insertion upper stages manufactured by Khrunichev State Research and Production Space Center and used on the Proton-M and Angara A5. The upper stages were also used on Rokot, one of Russia's smaller launchers, before its retirement in 2019.