“Until now, automotive equipment manufacturers lacked suitable ESD protection solutions specifically designed for 48V data lines,” claimed Nexperia head of protection devices Alexander Benedix. “As a result, they often had to rely on workarounds – either including an additional 12 V power rail or connecting several lower-voltage protection diodes [together].”
They are intended to protect CAN, CAN-FD, LIN, FlexRay and SENT busses.
All come in a SOT-23 package and contain a pair of bi-directional protection diodes comoned to one of the three terminals.
There are two devices at each 54, 60 and 72V working voltage, one for lower capacitance and one for higher spike currents (see table below).
Picking the PESD2CANFD72VT almost at random, it is designed not to conduct at 72V, where leakage will typically be 1nA (25°C, 50nA max), and to break-down will be somewhere between 74V and 94V, where up to 1.9A can be carried (8/20μs pulse).
Non-conducting capacitance is typically 2.8pF (3.4pF max).
Maximum contact ESD surge is 15kV (IEC 61000-4-2, and ISO 10605 330pF/330Ω or 150pF/330Ω).
Replacing the ‘V’ in the part number above with an ‘L’ increases pulse handling to 3A at the expense of 4.5pF typical capacitance.
| PESD2CANFD… | Working | Capacitance | Peak pulse | ESD |
| …72VT-Q | 72V | 2.8pF (typ) | 1.9A (max) | 15kV |
| …60VT-Q | 60 | 3.1 | 2.6 | 17 |
| …54VT-Q | 54 | 3.1 | 2.8 | 17 |
| …72LT-Q | 72 | 4.5 | 3 | 20 |
| …60LT-Q | 60 | 5.2 | 4 | 24 |
| …54LT-Q | 54 | 5.1 | 4 | 30 |
Qualification is according to AEC-Q101.
Find the 72V 1.9A PESD2CANFD72VT-Q on this web page
In February, the same company released ESD protection diodes for Open Alliance 10BASE-T1S automotive single-pair Ethernet.
