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PDF P6KE6.8A Datasheet ( Hoja de datos )

Número de pieza P6KE6.8A
Descripción 600 Watt Peak Power Surmetic TM -40 Transient Voltage Suppressors
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P6KE6.8A Hoja de datos, Descripción, Manual
P6KE6.8A Series
600 Watt Peak Power
Surmetict−40 Transient
Voltage Suppressors
Unidirectional*
The P6KE6.8A series is designed to protect voltage sensitive
components from high voltage, high energy transients. They have
excellent clamping capability, high surge capability and fast response
time. These devices are ON Semiconductor’s exclusive,
cost-effective, highly reliable Surmetict axial leaded package and is
ideally-suited for use in communication systems, numerical controls,
process controls, medical equipment, business machines, power
supplies and many other industrial/consumer applications.
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Cathode
Anode
Features
Working Peak Reverse Voltage Range − 5.8 to 171 V
Peak Power − 600 W @ 1 ms
ESD Rating of Class 3 (>16 KV) per Human Body Model
Maximum Clamp Voltage @ Peak Pulse Current
Low Leakage < 5 mA above 10 V
Maximum Temperature Coefficient Specified
UL 497B for Isolated Loop Circuit Protection
Response Time is Typically < 1 ns
Pb−Free Packages are Available*
Mechanical Characteristics
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CASE: Void-free, Transfer-molded, Thermosetting plastic
FINISH: All external surfaces are corrosion resistant and leads are
readily solderable
MAXIMUM LEAD TEMPERATURE FOR SOLDERING:
230_C, 1/16from the case for 10 seconds
POLARITY: Cathode indicated by polarity band
MOUNTING POSITION: Any
MAXIMUM RATINGS
Rating
Symbol Value Unit
Peak Power Dissipation (Note 1) @ TL 25°C
Steady State Power Dissipation
@ TL 75°C, Lead Length = 3/8 in
Derated above TL = 75°C
Thermal Resistance, Junction−to−Lead
Forward Surge Current (Note 2) @ TA = 25°C
Operating and Storage Temperature Range
PPK
PD
RqJL
IFSM
TJ, Tstg
600
5.0
50
20
100
− 55 to
+175
W
W
mW/°C
°C/W
A
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum
Ratings are stress ratings only. Functional operation above the Recommended
Operating Conditions is not implied. Extended exposure to stresses above the
Recommended Operating Conditions may affect device reliability.
1. Nonrepetitive current pulse per Figure 4 and derated above TA = 25°C per
Figure 2.
2. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses
per minute maximum.
AXIAL LEAD
CASE 017AA
PLASTIC
MARKING DIAGRAM
A
P6KExxxA
YYWWG
G
A = Assembly Location
P6KExxxA = Device Number
xxx = (See Table Page 3)
YY = Year
WW = Work Week
G = Pb−Free Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
Device
Package
Shipping
P6KExxxA
Axial Lead 1000 Units / Box
P6KExxxAG
Axial Lead 1000 Units / Box
(Pb−Free)
P6KExxxARL
Axial Lead 4000/Tape & Reel
P6KExxxARLG Axial Lead 4000/Tape & Reel
(Pb−Free)
†For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
**Please refer to P6KE6.8CA − P6KE200CA for
Bidirectional devices.
*For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting
Techniques Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2007
February, 2007 − Rev. 8
1
Publication Order Number:
P6KE6.8A/D

1 page

P6KE6.8A pdf
P6KE6.8A Series
APPLICATION NOTES
RESPONSE TIME
In most applications, the transient suppressor device is
placed in parallel with the equipment or component to be
protected. In this situation, there is a time delay associated
with the capacitance of the device and an overshoot
condition associated with the inductance of the device and
the inductance of the connection method. The capacitance
effect is of minor importance in the parallel protection
scheme because it only produces a time delay in the
transition from the operating voltage to the clamp voltage as
shown in Figure 7.
The inductive effects in the device are due to actual
turn-on time (time required for the device to go from zero
current to full current) and lead inductance. This inductive
effect produces an overshoot in the voltage across the
equipment or component being protected as shown in
Figure 8. Minimizing this overshoot is very important in the
application, since the main purpose for adding a transient
suppressor is to clamp voltage spikes. The P6KE6.8A series
has very good response time, typically < 1 ns and negligible
inductance. However, external inductive effects could
produce unacceptable overshoot. Proper circuit layout,
minimum lead lengths and placing the suppressor device as
close as possible to the equipment or components to be
protected will minimize this overshoot.
Some input impedance represented by Zin is essential to
prevent overstress of the protection device. This impedance
should be as high as possible, without restricting the circuit
operation.
DUTY CYCLE DERATING
The data of Figure 1 applies for non-repetitive conditions
and at a lead temperature of 25°C. If the duty cycle increases,
the peak power must be reduced as indicated by the curves
of Figure 6. Average power must be derated as the lead or
ambient temperature rises above 25°C. The average power
derating curve normally given on data sheets may be
normalized and used for this purpose.
At first glance the derating curves of Figure 6 appear to be
in error as the 10 ms pulse has a higher derating factor than
the 10 ms pulse. However, when the derating factor for a
given pulse of Figure 6 is multiplied by the peak power value
of Figure 1 for the same pulse, the results follow the
expected trend.
TYPICAL PROTECTION CIRCUIT
Zin
Vin
LOAD
VL
V Vin (TRANSIENT)
VL
Vin
td
tD = TIME DELAY DUE TO CAPACITIVE EFFECT
t
Figure 7.
OVERSHOOT DUE TO
V INDUCTIVE EFFECTS
Vin (TRANSIENT)
VL
Figure 8.
t
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