1.5 kW peak pulse, 342 V standoff — the clamping envelope that protects 400 V DC rails
The 1.5KE400A-HF: Its 342 V reverse standoff voltage and 548 V maximum clamping at 2.72 A peak pulse current define the protection window for 400 V DC bus rails, industrial power supplies, and telecom rectifier outputs. The 380 V minimum breakdown voltage ensures the device starts conducting before the rail exceeds the downstream components' absolute maximum rating, while the 548 V clamp holds the transient below the typical 600 V MOSFET avalanche threshold.
DO-201 axial package — through-hole mounting for high-surge board positions
The operating junction temperature range spans -55°C to 150°C, covering industrial enclosures and outdoor telecom cabinets without derating at the hot end.
Power line protection is not supported — this is a general-purpose transient suppressor, not a dedicated AC mains protector. For line-to-line or line-to-ground clamping on 240 VAC or 480 VAC circuits, select a TVS rated for continuous AC voltage stress.