P6KE6.8 thru P6KE540A
Vishay General Semiconductor
100
Transient Thermal Impedance (°C/W)
10
1
0.1
0.001
0.01
0.1
1
10
100
1000
t
p
- Pulse Duration (s)
Figure 7. Typical Transient Thermal Impedance
PACKAGE OUTLINE DIMENSIONS
in inches (millimeters)
DO-204AC (DO-15)
0.034 (0.86)
0.028 (0.71)
DIA.
1.0 (25.4)
MIN.
0.300 (7.6)
0.230 (5.8)
0.140 (3.6)
0.104 (2.6)
DIA.
1.0 (25.4)
MIN.
APPLICATION NOTE
This P6KE TVS series is a low cost commercial
product for use in applications where large voltage
transients can permanently damage voltage-sensitive
components.
The P6KE series device types are designed in a small
package size where power and space is a
consideration. They are characterized by their high
surge capability, extremely fast response time, and low
impedance, (R
on
). Because of the unpredictable
nature of transients, and the variation of the
impedance with respect to these transients,
impedance, per se, is not specified as a parametric
value. However, a minimum voltage at low current
conditions (BV) and a maximum clamping voltage (V
c
)
at a maximum peak pulse current is specified.
www.vishay.com
6
In some instances, the thermal effect (see V
c
Clamping Voltage) may be responsible for 50 % to
70 %. of the observed voltage differential when
subjected to high current pulses for several duty
cycles, thus making a maximum impedance
specification insignificant.
In case of a severe current overload or abnormal
transient beyond the maximum ratings, the Transient
Voltage Suppressor will initially fail 'short' thus tripping
the system's circuit breaker or fuse while protecting the
entire circuit. Curves depicting clamping voltage vs.
various current pulses are available from the factory.
Extended power curves vs. pulse time are also
available.
For technical questions within your region, please contact one of the following:
PDD-Americas@vishay.com, PDD-Asia@vishay.com, PDD-Europe@vishay.com
Document Number: 88369
Revision: 22-Oct-08
VISHAY [ VISHAY TELEFUNKEN ]
