SRB-A3
Exact Epsilon first-stage solid motor, a slightly modified SRB-A3 derivative of the H-IIA/H-IIB booster family.
Identity
- Aliases
- SRB-A3SRB-A3 solid rocket motor
- Domains
- spaceflight
- Identity Level
- variant
- Kind
- solid-rocket-motor
- Name
- SRB-A3
- Status
- unknown
Details
- Description
- Exact Epsilon first-stage solid motor, a slightly modified SRB-A3 derivative of the H-IIA/H-IIB booster family.
- Developers
- Lineage
- Note
- JAXA describes the Epsilon first-stage motor as a slightly modified SRB-A3; the existing SRB-A record is retained as the broader installed booster boundary.
- Related Propulsion System
- Relationship
- direct-derivative-of
- Sources
- Nested value
- Manufacturers
- Propellants
- solid HTPB composite
Assets & Meta
- Creation Time
- August 1, 2026 at 16:32:24 UTC
- Updated Time
- August 1, 2026 at 16:32:24 UTC
Other
- Sources
- Accessed Date
- 2026-08-01
- Note
- Table 2-1 and the propulsion section identify SRB-A3 as the exact Epsilon first-stage motor and specify solid HTPB propellant.
- Publisher
- Japan Aerospace Exploration Agency
- Title
- Epsilon User's Manual
- Accessed Date
- 2026-08-01
- Note
- JAXA distinguishes the Enhanced Epsilon first-stage SRB-A heritage from the later Epsilon-S SRB-3 design.
- Publisher
- JAXA Space Transportation Technology Directorate
- Title
- Epsilon Launch Vehicle