| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
|---|---|---|---|---|---|---|---|---|---|
|
10,000 pcs
|
10000 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
| Category | |
| Manufacturer Name | |
| Applications | |
| Current | |
| Mounting Type | |
| Operating Temperature | |
| Power | |
| Power Line Protection | |
| Supplier Device Package | |
| Supplier Package | |
| Type | |
| Unidirectional Channels | |
| Voltage |
The STMicroelectronics SMA4F85A is a unidirectional Transient Voltage Suppressor (TVS) diode from the SMA4F series. Designed to protect sensitive electronic circuits from transient surges, this device features a peak pulse power dissipation of 400 W for a 10/1000 μs waveform and 2.5 kW for an 8/20 μs waveform. It operates within a stand-off voltage range from 5 V to 188 V, with a specific breakdown voltage of 85 V at 10 μA and a clamping voltage of 137 V at 2.9 A.
This TVS diode is constructed using planar technology, ensuring low leakage current (0.2 μA at 25 °C) and high junction temperature capability (up to 175 °C), which contributes to long-term reliability and stability. The operating junction temperature range is -55 °C to +175 °C.
The SMA4F85A is housed in a DO-221AC, SMA Flat Leads package, also known as SMAflat, suitable for surface mounting. Its lead finishing is matte tin plating. The device complies with IEC 61000-4-2 standards, exceeding level 4 with 25 kV contact discharge and 30 kV air discharge protection.
Key electrical characteristics include a maximum leakage current of 0.2 μA at 25 °C and 1 μA at 85 °C. The device is rated for 1 unidirectional channel and offers a peak pulse current handling of 2.9 A at 10/1000 μs. Its high power capability at Tj max is up to 200 W (10/1000 µs).
| Qty | Low | High |
|---|---|---|
| 1+ | $0.99 | $0.99 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The SMA4F85A TVS diode has a peak pulse power of 400 W for a 10/1000 μs waveform and 2.5 kW for an 8/20 μs waveform.
The SMA4F series offers a stand-off voltage range from 5 V to 188 V.
The breakdown voltage for the SMA4F85A is a minimum of 85 V at 10 μA.
The clamping voltage for the SMA4F85A is a maximum of 137 V at 2.9 A.
The operating temperature range for this TVS diode is -55°C to +175°C (TJ).
The SMA4F85A exceeds level 4 of IEC 61000-4-2, providing 25 kV for contact discharge and 30 kV for air discharge.
The SMA4F85A is available in a DO-221AC, SMA Flat Leads package, also known as SMAflat.