D
S21508 Rev. B-4 1 of 4 P4KE6.8-P4KE400CA
P4KE6.8 - P4KE400CA
TRANSIENT VOLTAGE SUPPRESSOR
UL Recognized
400W Peak Pulse Power Dissipation
Voltage Range 6.8V - 400V
Constructed with Glass Passivated Die
Uni and Bidirectional Versions Available
Excellent Clamping Capability
Fast Response Time
Maximum Ratings
@ T
A
= 25C unless otherwise specified
Characteristic
Symbol
Value
Unit
Peak Power Dissipation, T
p
= 1.0 ms (Non repetitive current pulse,
per Figure 1 and derated above T
A
= 25C per Figure 4)
P
pk
400
W
Steady State Power Dissipation at T
L
= 75C
Lead Lengths 9.5 mm per Figure 5 (Mounted on Copper Land Area of 40mm
2
)
P
d
1.0
W
Peak Forward Surge Current, 8.3 ms Single Half Sine Wave, Superimposed
on Rated Load (JEDEC Method) Duty Cycle = 4 pulses per minute maximum)
I
FSM
40
A
Forward Voltage @ I
F
= 20A
V
BR
200V
300s Square Wave Pulse, Unidirectional Only
V
BR
> 200V
V
F
3.5
6.5
V
Operating and Storage Temperature Range
T
j
, T
STG
-55 to +175
C
Features
Case: Transfer Molded Epoxy
Leads: Plated Leads, Solderable per
MIL-STD-202, Method 208
Marking: Unidirectional - Type Number and
Cathode Band
Marking: Bidirectional - Type Number Only
Approx. Weight: 0.4 grams
Mounting Position: Any
Mechanical Data
A
A
B
C
D
DO-41
Dim
Min
Max
A
25.40
--
B
4.06
5.21
C
0.71
0.884
D
2.00
2.72
All Dimensions in mm
D
S21508 Rev. B-4 2 of 4 P4KE6.8-P4KE400CA
10 X 1000 Waveform
as defined by REA
0
25
50
75 100 125 150 175 200
100
75
50
25
0
T , AMBIENT TEMPERATURE (C)
Fig. 4 Pulse Derating Curve
A
PK
PULSE
DERA
TING
(%
PK
PWR
OR
CURRENT
)
L = 9.5 mm
40 x 40 x 1 mm Cu
0
25
50
75
100 125 150 175 200
0
T , LEAD TEMPERATURE (C)
Fig. 5, Steady State Power Derating
L
P
,
STEADY
ST
A
T
E
POWER
DISSIP
A
TION
(W)
d
Single Phase
Half-Wave 60Hz
Resistive or
Inductive Load
0.25
0.5
0.75
1.0
0.1
1.0
T , PULSE WIDTH (s)
Fig. 3 Pulse Rating Curve
p
0.1
10
100
1.0
10
100
1000
10000
P
,
PEAK
PULSE
POWER
(kW)
P
Non-Repetitive
Pulse Waveform
Shown in Fig. 1
T = 25C
A
0
1
2
3
100
50
0
I
,
PEAK
PULSE
CURRENT
(%
)
Pp
p
t = 10ms
r
Peak Value I
pp
Half Value I /2
pp
10 X 1000 Waveform
as defined by R.E.A.
t
p
t, TIME (ms)
Fig. 1 Pulse Waveform
1
10
100
1000
100
1000
10,000
100,000
V
, REVERSE STANDOFF VOLTAGE (V)
Fig. 2 Typical Junction Capacitance
RWM
C
,
CAP
ACIT
ANCE
(pF)
j
Measured at
Stand-off Voltage
Measured at
Zero Bias
T = 25C
j
f = 1.0 MHz
V = 50mV p-p
sig
Notes:
1. Suffix `C' denotes bidirectional device. Suffix `A' denotes 5% tolerance device, no suffix denotes 10% tolerance device.
2. For bidirectional devices having V
R
of 10 volts and under, the I
R
limit is doubled.
3. Type Number marking may contain a "V" or dash in place of decimal point.