Littelfuse Inc. 1.5SMB series Zener TVS diode, 1.5SMB27A, 1500W peak pulse power, 23.1V reverse standoff, 37.5V clamping, unidirectional, DO-214AA (SMB), surface mount.
| Parameter | Value |
|---|---|
| Type | Zener |
| Series | 1.5SMB |
| Mounting | Surface Mount |
| Voltage - breakdown | 25.7V |
| Voltage - clamping (Max) @ ipp | 37.5V |
| Voltage - reverse standoff | 23.1V |
| Current - peak pulse (10/1000μs) | 40.5A |
| Power - peak pulse | 1500W (1.5kW) |
| Power line protection | No |
| Operating temperature | -65°C~150°C(TJ) |
| Package | Tape & Reel (TR) |
| Applications | Telecom |
| Case | DO-214AA, SMB |
| Unidirectional channels | 1 |
The 1.5SMB27A: This window — 23.1V standoff, 37.5V clamp — fits telecom and industrial DC rails operating at 24V nominal, where a transient above 37.5V is shunted before reaching the downstream silicon.
The wide -65°C to 150°C junction temperature range covers telecom outdoor cabinets and industrial enclosures without derating concerns at the high end.