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 is Cartridges, power device, a Class 1 explosive assigned to ERG Guide 112. It presents a projection and fragmentation hazard where standoff distance, isolation and specialist explosive support are the main responder priorities.
Hazard overview: UN 0381 presents a severe projection and fragmentation hazard rather than a simple fire problem. Initiation may produce blast overpressure near the source and throw fragments, burning articles or debris over a wide area. Heat, shock, impact or electrical energy can make the article more dangerous.
Response guidance: For a UN 0381 incident, responders should confirm the material using shipping papers, placards, package markings and ERG Guide 112. Establish incident command, isolate the area, deny entry, request law enforcement and EOD support, and withdraw personnel if fire involves the explosive material or containers.
Firefighter training notes: Training should emphasize recognizing Class 1 explosive placards, establishing command early, using standoff distance, denying entry and requesting bomb squad or EOD support. Common tactical errors include approaching packages for identification, moving damaged items, fighting fire too close and underestimating fragmentation distance. Use ERG 112, shipping papers and local explosive incident SOP.
Regulatory context: Cartridges, power device is regulated as a Class 1 explosive hazardous material. Transport, storage, reporting and scene-control requirements may involve DOT, ATF, OSHA, military, state or local authorities depending on ownership and quantity. Responders should verify requirements through shipping papers, facility documents, law enforcement and current regulations.
Storage & handling: Cartridges, power device should be stored only in approved explosive magazines or authorized storage areas, separated from ignition sources, incompatible materials and unauthorized access. Packages should be protected from heat, impact, friction, moisture where relevant and physical damage according to product documentation and applicable explosive storage regulations.
UN 0381 Quick Details
Common Hazards of UN 0381
- Projection and fragmentation hazard; explosive items may project fragments or debris if initiated.
- Blast overpressure may be severe in the immediate area.
- May be sensitive to heat, shock, friction, impact or electrical energy depending on the article.
- Fire involvement may cause violent rupture, projection or detonation of individual articles.
- May initiate nearby explosive articles or charges if stored or transported together.
- Smoke from fire may contain irritating or toxic combustion products.
Chemical Identity & Physical Properties
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.
| 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
For UN 0381, distance, cover and evacuation are more important than close-range PPE. Structural firefighting gear and SCBA may be used only for remote exposure protection or support roles; direct approach or handling should be limited to qualified EOD or explosive specialists under incident command.
Isolation & Evacuation
First Actions for a UN 0381 Incident
- CALL 911. Then call the emergency response telephone number on the shipping paper, if available.
- Keep unauthorized personnel away and deny entry to the hazard area.
- Stage responders upwind, uphill and outside the recommended isolation distance.
- Request law enforcement, bomb squad or EOD, hazmat and additional command resources immediately.
- Do not handle, move or disturb explosive articles unless directed by qualified explosive ordnance personnel.
- Do not approach fire-involved articles because projection and fragmentation may occur without warning.
- Protect exposures only from a safe, remote position if directed by incident command and local SOP.
- Use ERG Guide 112, shipping papers and incident command to set isolation and evacuation distances.
📋 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.