1500 W peak pulse power in a through-hole axial package
The 1N6141A: That 1500 W rating is the headline number for a procurement buyer: it tells you the diode can absorb a 111.9 A pulse before the junction gives way. The reverse standoff voltage of 6.9 V means this part sits on a 5 V or 6 V supply bus and stays off until a surge pushes the line above its breakdown threshold of 8.65 V. The clamping voltage of 13.4 V is the ceiling the protected circuit sees — keep that below the downstream IC's absolute maximum rating.
Temperature range and junction limits
The junction temperature range spans -55°C to 175°C — that is a full military-grade envelope. A part that lives at 175°C junction can handle under-hood automotive, engine-bay electronics, or outdoor telecom cabinets where ambient heat plus self-heating pushes the die well past 125°C. The axial leaded package conducts heat into the PCB copper or a heatsink clip better than a small SMD package would.
Through-hole axial package — hand-solder friendly
The package is a through-hole axial leaded device — the leads come out both ends of the body, so it sits flat on the board or stands off with a formed lead. Hand-solderable without a hot-air station; the body is large enough to read the marking without magnification.