Are avalanche-rated mosfets immune to ESD?

_Nothing_ is ESD immune. It's all black magic. A fart let slightly off-center will trigger an ESD event ;-)

...Jim Thompson

-- | James E.Thompson, P.E. | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

| 1962 | Shouldn't President BO be treated like any other form of BO ?:-)

So you don't know then? :)

I find it amusing that those huge 1.5KE TVS diodes come with big yellow stickers on the reels - "WARNING STATIC SENSITIVE COMPONENTS".

--

John Devereux

To clarify, I mean when in-circuit. Do I need to protect a mosfet output against ESD? It seems to me that I don't, since the part should avalanche for the duration of the ESD event.

--

John Devereux

Of course not. Like I say, "It's all black magic." And I be not kidding.

Most chips are ESD-damage-prone until soldered to the PCB.

...Jim Thompson

--
| James E.Thompson, P.E.                           |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
 I love to cook with wine     Sometimes I even put it in the food

_Large_ MOS devices (at outputs... i.e. drains) rarely need any ESD protection.... they self-protect by turning on. And you are correct, under those conditions the energy rating would prevail.

...Jim Thompson

--
| James E.Thompson, P.E.                           |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon at http://www.analog-innovations.com |    1962     |
             
 I love to cook with wine     Sometimes I even put it in the food

Vaccuum tubes!

Bob

That probably pertains more to EMP.

Bob

What are those then... do they come in sot-23?

--

John Devereux

SOT23-5 or SOT23-6

-- Thanks, Fred.

But most chips are "ESD-damage-prone" until soldered onto the PCB

*because* they don't have their big honking TVS diodes yet. ;-)