1500W peak pulse in a DO-201AD axial
The 1.5KE75ARL4G: It clamps at 103V maximum with a 64.1V reverse standoff — sized for 48V or 60V DC bus protection where the transient energy budget fits the 1.5kW rating.
Clamping voltage and breakdown margin
Breakdown voltage starts at 71.3V minimum, so the device begins conducting before the rail reaches 72V. The 103V clamp at 14.6A peak pulse current means the protected circuit sees no more than 103V across the terminals during a surge — the margin between the rail's normal peak and the clamp determines the headroom for downstream components. Operating temperature spans -65°C to 175°C junction — the full military-grade range. The 175°C TJ ceiling allows the part to absorb repetitive pulses without derating the peak power, as long as the average junction temperature stays below the absolute maximum.
Obsolete — sourcing through independent channels
Littelfuse lists the 1.5KE75ARL4G as obsolete. No official successor is recorded — the Mosorb™ series has been phased out.