The 1.5KE27ARL4G: Breakdown voltage is guaranteed at 25.7 V minimum, so a 24 V nominal rail with 10 % tolerance (26.4 V max) stays below the avalanche threshold in steady state; the TVS only conducts during an overvoltage transient. Unidirectional single-channel design means it protects one polarity — reverse the leads and the forward voltage drop is a diode drop, not a clamp, so orientation in the DO-201AD axial package matters on the board. Operating junction temperature spans -65 °C to 175 °C — wide enough for industrial and telecom gear that sees thermal cycling, but the 1500 W rating derates above 25 °C ambient per the standard power-derating curve for this package.
1.5KE27ARL4G Littelfuse Mosorb Zener, 1.5 kW, 37.5V Clamp
MPN1.5KE27ARL4G
Obsolete
Littelfuse Inc. Mosorb™ Zener TVS, 1.5KE27ARL4G, 1500W peak pulse power, 23.1V reverse standoff, 37.5V clamping, unidirectional, DO-201AD axial, Tape & Reel.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Type | Zener |
| Series | Mosorb™ |
| Mounting | Through Hole |
| Voltage - breakdown | 25.7V |
| Voltage - clamping (Max) @ ipp | 37.5V |
| Voltage - reverse standoff | 23.1V |
| Current - peak pulse (10/1000μs) | 40A |
| 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 |