With a 193 V maximum clamping voltage at 900 mA peak pulse current (10/1000 µs waveform), it keeps downstream silicon below its breakdown threshold during surges like inductive load dumps or lightning-coupled events. The SOD-123FL package is a low-profile surface-mount footprint — the board layout needs a generous copper pad under the cathode tab to pull heat away during repetitive pulsing.
SMF120AT1 onsemi Zener TVS – Obsolete, 120 V Standoff
MPNSMF120AT1
Obsolete
onsemi SMF120AT1 Zener TVS diode, 120 V reverse standoff, 193 V clamping, 200 W peak pulse power, SOD-123FL package, -55 to 150 °C
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Type | Zener |
| Mounting | Surface Mount |
| Voltage - breakdown | 133V |
| Voltage - clamping (Max) @ ipp | 193V |
| Voltage - reverse standoff | 120V |
| Current - peak pulse (10/1000μs) | 900mA |
| Power - peak pulse | 200W |
| Power line protection | No |
| Operating temperature | -55°C~150°C(TJ) |
| Package | Tape & Reel (TR) |
| Applications | General Purpose |
| Case | SOD-123F |
| Unidirectional channels | 1 |
Product details
Frequently asked questions
What package does the SMF120AT1 use?
The SMF120AT1 is supplied in a SOD-123FL surface-mount package. It is also offered on tape and reel for automated assembly.