Littelfuse Inc. Mosorb™ series, Zener TVS diode, 1.5KE51ARL4G, 1500W peak pulse power, 43.6V reverse standoff, DO-201AD axial, unidirectional.
| Parameter | Value |
|---|---|
| Type | Zener |
| Series | Mosorb™ |
| Mounting | Through Hole |
| Voltage - breakdown | 48.5V |
| Voltage - clamping (Max) @ ipp | 70.1V |
| Voltage - reverse standoff | 43.6V |
| Current - peak pulse (10/1000μs) | 21.4A |
| Power - peak pulse | 1500W (1.5kW) |
| Power line protection | No |
| Operating temperature | -65°C~175°C(TJ) |
| Package | Tape & Reel (TR) |
| Applications | General Purpose |
| Case | DO-201AD, Axial |
| Unidirectional channels | 1 |
The 1.5KE51ARL4G: The 43.6 V standoff means this device protects 48 V nominal DC buses and 36 V battery systems, clamping transients before they reach downstream silicon rated for 80 V or less.
Single unidirectional channel — the cathode band identifies the anode-to-ground orientation; reverse insertion places the junction in forward conduction and removes protection.
This obsolete part is sourced through independent surplus and broker channels.