10-503140-032 Datasheet, PDF (423/437 Pages) Amphenol Corporation – The Interconnection Leader

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(ESD) Protected Connectors
Protection from Electrostatic Discharge
Amphenol has developed cylindrical and rectangular
connectors which protect sensitive components from
Electrostatic Discharge (ESD) without diodes, varistors, gas
tubes, or “experimental” semi-conductive materials.
These connectors utilize the Faraday Cage principal to shunt
electrostatic discharge events to the conductive enclosure on
which the connector is mounted, thus never allowing the high volt-
age, high current discharge event to reside on any contacts.
The ESD protected connectors have the same physical envelope
as their standard counterparts, and do not require special
mounting or terminating techniques. All of the contacts remain fully
functional, and electrical characteristics such as capacitance are
not effected.
Product Features:
• Connector envelope identical to unprotected design for
most applications
• Exceeds protection requirements of IEC 801-2 and
MIL-STD-1686:
• Ensures that all components within a conductive enclosure
will be subjected to a maximum of 10V during electrostatic
discharges between –26 KV and +26 KV
• Voltage observed on contacts during ESD events –
<10V (at 1 megohm)
• Current observed on contacts during ESD events –
<100 milliamperes (at 2 ohms)
• Response time – instantaneous
(voltage and current are maximum values)
• Maximum ESD voltage – tested to ±26KV
• No capacitive loading
• Eliminates the need for discrete components (such as
diodes) and maximizes printed circuit board real estate for
equipment housed in conductive enclosures which require
ESD protection as free-standing units
• Operating voltage of connectors not effected for most
designs
• Pulse life – infinite
What is Electrostatic Discharge (ESD)?
Electrostatic Discharge (ESD) is the rapid transfer of a static
electric charge from one body to another. A static electric charge
consists of either a surplus or depletion of electrons on a body,
which gives that body a potential or voltage relative to ground (or
another body). The discharge is extremely fast (less than 1 nano-
second risetime) and the current flow may exceed 100 amps!
Static electricity is normally the result of two materials transferring
charges when rubbed or separated, such as shoes scuffing across
a dry carpet, or sheets of untreated plastic being separated. This
phenomena is commonly referred to as the triboelectric effect.
The voltage developed due to the triboelectric effect depends
on the materials involved, the quantity and type of contact, and
relative humidity. In a dry environment a person can accumulate a
charge of up to 25 KV! In a moist environment a person’s potential
is reduced due to the effect of moisture on the insulating
properties of materials.
ESD Testing on MIL-DTL-38999, Series III
Filter Cylindrical Connector (Actual Photo)
What is a Faraday Cage?
A Faraday cage is a conductive enclosure. It may be sol-
id in form such as a sheet–metal enclosure, or it may be
full of apertures, such as a wire cloth box. When a charge
is placed on a faraday cage the electrons which make
up the charge, having like polarity, try to position them-
selves as far as possible from each other. This places the
electrons on the outer surface of the enclosure, leaving
the inner surface uncharged. The charge on the outer
surface does not induce a charge on any neutral object
inside of the faraday cage, and therefore does not try
to transfer itself onto the internal object. Neutral objects
(such as IC’s) inside of a faraday cage are thereby
protected from ESD activity external to the faraday cage.
The voltage and current observed on neutral objects
within a faraday cage during ESD events are due to the
secondary effects of ESD. These include Electromagnetic
Interference (EMI), magnetic and electrical field coupling.
The faraday cage of the Amphenol ESD Protected Con-
nectors has been designed to minimize these effects.
The Amphenol^® ESD Protected Connectors
The Amphenol ESD Protected Connectors have a
faraday cage at the mating interface. The faraday cage
has been specifically designed to intercept electrostatic
discharges from the contacts in the unmated state, while
maintaining each contact’s isolation when the connec-
tor is mated. When the ESD Protected Connectors have
been mounted to a conductive enclosure, a faraday cage
is created which will protect components located within
the enclosure from electrostatic discharges. This
eliminates the need for discrete components such as
diodes and gas discharge tubes, and saves printed
circuit board real estate. Amphenol ESD Protected
Connectors have also been applied to Line Replaceable
Modules (LRM).*
* For further information on Amphenol LRM connectors with ESD
protection see page 434.
422 Contact Amphenol Aerospace for more information at 800-678-0141 • www.amphenol-aerospace.com