1500W Zener TVS – 44.7V Breakdown, DO-201AD Axial
The 1.5KE47ARL4 is a unidirectional Zener TVS diode from onsemi's Mosorb™ series, rated for 1500W peak pulse power (10/1000µs waveform). Its minimum breakdown voltage of 44.7V and reverse standoff of 40.2V make it suited for clamping transients on 36V to 40V nominal rails in general-purpose industrial and telecom equipment. The DO-201AD axial package (through-hole) handles the 23.2A peak pulse current at the clamping voltage of 64.8V max. Operating temperature range extends from -65°C to 175°C junction, covering harsh environments like outdoor power supplies and motor drives.
Obsolete – Plan Replacement or Source Last-Time Buy
onsemi has marked the 1.5KE47ARL4 as Obsolete. For a drop-in replacement, search for a 1.5KE47A variant in the same axial package – confirm the breakdown voltage and peak pulse power match your BOM. Submit an RFQ to check current availability and pricing for your target quantity.
Peak Pulse Power and Clamping Performance
At 1500W peak pulse power, this TVS can absorb transient energy from inductive load switching or lightning-induced surges. The clamping voltage of 64.8V at 23.2A peak pulse current means the protected rail sees no more than ~65V during a surge event – critical for downstream DC-DC converters and ICs with 60V absolute maximum ratings. No power line protection – this is a unidirectional device for DC rails, not AC mains. The single-channel configuration protects one line per part.