SRB-A
Closeup of the SRB-A attached to the H-IIA rocket which launched the Global Precipitation Measurement spacecraft | |
| Manufacturer | IHI Corporation |
|---|---|
| Country of origin | Japan |
| Used on | |
| SRB-A | |
| Height | 14.6 m (47 ft 11 in) |
| Diameter | 2.5 m (8 ft 2 in) |
| Gross mass | 75.5 t (166,449 lb) |
| Propellant mass | 66.8 t (147,269 lb) |
| Maximum thrust | 2,300 kN (517,061 lbf) |
| Specific impulse | 283.6 s (2.781 km/s) |
| Burn time | 110 seconds |
| SRB-3 | |
| Height | 15.1 m (49 ft 6 in) |
| Diameter | 2.5 m (8 ft 2 in) |
| Gross mass | 76.6 t (168,874 lb) |
| Propellant mass | 66 t (145,505 lb) |
| Maximum thrust | 2,158 kN (485,138 lbf) |
| Specific impulse | 283.6 s (2.781 km/s) |
| Burn time | 116 seconds |
The SRB-A and SRB-3 are a family of Japanese solid-fueled rocket boosters developed and manufactured by IHI Corporation for use on the H-IIA, H-IIB, Epsilon, H3, and Epsilon S launch vehicles. The earlier versions, designated SRB-A, flew from 2001 to 2025, while the successor SRB-3 made its first flight in 2023.