| Distributor | Stock | Pricing | MOQ | PKG | Lead Time | Date Code | On Order Quantity | On Order Delivery | |
|---|---|---|---|---|---|---|---|---|---|
|
2,800 pcs
|
2800 pcs | On Request | 1 | On Request | On Request | On Request | On Request | On Request |
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| Manufacturer Name | |
| Applications | |
| Current | |
| Forward Voltage | |
| Halogen Free | |
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| Operating Temperature | |
| Peak Forward Surge Current | |
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| Power Line Protection | |
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| Supplier Device Package | |
| Tape & Reel | |
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| Unidirectional Channels | |
| Voltage |
The SMAJ78A is a unidirectional transient voltage suppression (TVS) diode manufactured by Littelfuse Inc. It is designed to protect sensitive electronic equipment from voltage transients induced by lightning and other transient events. This device is part of the SMAJ series, offering 400W peak pulse power capability at 10/1000μs waveform.
Key electrical specifications include a reverse standoff voltage of 78V, a maximum clamping voltage of 126V at peak pulse current, and a peak pulse current of 3.2A. The device features a fast response time of less than 1.0ps from 0V to breakdown voltage. It also provides ESD protection with 30kV air and contact discharge per IEC 61000-4-2.
The SMAJ78A is suitable for general purpose applications such as protecting I/O interfaces, VCC bus, and other vulnerable circuits in telecom, computer, industrial, and consumer electronics. It has a typical leakage current of less than 1μA when the breakdown voltage is above 12V. The device is unidirectional with a single channel.
The TVS diode is housed in a DO-214AC (SMA) surface mount package, allowing for compact PCB layout. It has an operating temperature range of -65°C to 150°C and a storage temperature range of -65°C to 175°C. The device is RoHS3 compliant, halogen free, and lead free (Pb-free E3).
| Qty | Low | High |
|---|---|---|
| 1+ | $0.48 | $0.48 |
| 10+ | $0.30 | $0.30 |
| 100+ | $0.19 | $0.19 |
| 500+ | $0.14 | $0.14 |
| 1,000+ | $0.12 | $0.12 |
| 2,000+ | $0.11 | $0.11 |
| 5,000+ | $0.08 | $0.08 |
| 10,000+ | $0.07 | $0.07 |
| 15,000+ | $0.07 | $0.07 |
| 25,000+ | $0.07 | $0.07 |
| 35,000+ | $0.06 | $0.06 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The reverse standoff voltage is 78V.
The maximum clamping voltage is 126V at peak pulse current.
The maximum peak pulse current is 3.2A for a 10/1000μs waveform.
The SMAJ78A is available in a DO-214AC (SMA) surface mount package.
The device provides ESD protection of 30kV air discharge and 30kV contact discharge per IEC 61000-4-2.
The operating temperature range is -65°C to 150°C (junction temperature).
The typical response time is less than 1.0ps from 0V to breakdown voltage.