UN 0381 — Cartridges, power device
Placard: Explosive 1.2C. ERG Guide 112. Training/quick-reference only — use current ERG + SOP/SOG for incident-specific actions.
UN 0381 covers power device cartridges—metallic or composite cylinders packed with explosive charges designed to actuate mechanical systems such as ejection seats, cable cutters, and emergency releases. Classified as Class 1.2C explosives, these devices present a significant projection hazard upon initiation.
Hazard overview: Initiation of UN 0381 cartridges produces blast overpressure in the immediate area and propels fragments or actuator components with enough force to cause serious injury or structural damage. The 1.2C classification indicates that while mass detonation of the full load is unlikely, individual item initiation poses a meaningful fragmentation threat.
Response guidance: ERG Guide 112 directs an initial isolation of 500 meters in all directions; if fire or major cargo exposure is involved, evacuate 1,600 meters downwind. Apply water spray only from a protected standoff position—never direct streams onto burning cartridges—and do not approach burning material.
UN 0381 Quick Details
Common Hazards of UN 0381
- Projection and fragmentation hazard on initiation.
- Blast overpressure in immediate area.
- Sensitive to heat, shock, or electrical current.
- May initiate other explosives in proximity.
Chemical Identity & Physical Properties
UN 0381 cartridges are cylindrical metallic or composite housings in varying sizes and colors, each containing a precisely formulated explosive charge engineered to produce a controlled mechanical impulse.
| Also known as | Power device cartridgesActuator cartridgesPyrotechnic cartridgesExplosive actuator devices |
| Appearance | Metallic or composite cartridges containing explosive charges designed to actuate mechanical devices. Typically cylindrical, may be various sizes and colors depending on manufacturer and application. |
| Flash Point | Not applicable (explosive device) |
| Boiling Point | Not applicable (explosive device) |
| Vapor Density | Not applicable (solid explosive device) |
| Water Reactivity | No significant reaction with water, but avoid wetting as may affect reliability |
Fireground Response Guidance — UN 0381
Extinguishing Media
PPE Requirements
Minimum Level B protection is required for handling; full structural firefighting gear with SCBA is mandatory if fire is involved, and personnel must maintain maximum safe standoff distance at all times.
Isolation & Evacuation
First Actions for a UN 0381 Incident
- CALL 911. Then call emergency response telephone number on shipping paper.
- Isolate minimum 500 meters; stage upwind and uphill.
- Request Hazmat + law enforcement immediately.
- Control ignition sources; deny unauthorized entry.
- Do not approach — projectile/fragmentation hazard.
- Consult current ERG Guide 112 and follow SOP/SOG.
📋 Copy & Share Field Card
UN 0381 — Cartridges, power deviceUse for: Quick radio or face-to-face size-up. Short, structured, field-ready.
Use for: Incident command briefing, staging area whiteboard, or pre-entry team brief.
Use for: Quick text to command or incoming units. Fits in a single SMS.