TVS diode in the 1.5SMC family
The 1.5SMC91A: The single unidirectional channel handles one polarity of the circuit; the polarity orientation on the board matters — the cathode connects to the positive rail.
1.5SMC91A Littelfuse TVS Diode, 77.8V Standoff, 1.5kW
MPN1.5SMC91A
Active
Littelfuse 1.5SMC91A unidirectional TVS diode, 77.8V standoff, 86.5V min breakdown, 125V clamping, 12.2A peak pulse, 1.5kW peak pulse power, DO-214AB SMC surface-mount.
$0.6200Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Type | Zener |
| Series | 1.5SMC |
| Mounting | Surface Mount |
| Voltage - breakdown | 86.5V |
| Voltage - clamping (Max) @ ipp | 125V |
| Voltage - reverse standoff | 77.8V |
| Current - peak pulse (10/1000μs) | 12.2A |
| Power - peak pulse | 1500W (1.5kW) |
| Power line protection | No |
| Operating temperature | -55°C ~ 150°C (TJ) |
| Package | Tape & Reel (TR) Cut Tape (CT) |
| Applications | General Purpose |
| Case | DO-214AB, SMC |
| Unidirectional channels | 1 |
Product details
Frequently asked questions
Who supplies 1.5SMC91A and how is it quoted for volume purchases?
Volume leads are quoted per BOM quantity and lot-date requirements if traceability is specified.
What is the 1.5SMC91A used for and what makes this voltage rating stand out?
It protects general-purpose circuits from voltage transients — the 77.8 V standoff and 86.5 V breakdown sit above standard 24 V and 48 V rails, and the 125 V clamping ceiling keeps downstream components within their abs-max ratings during a surge event. The 1.5 kW peak pulse rating means it survives single-event transients up to that energy without degradation.