Transient Voltage Suppressors (TVS)
Description
The SMBJ series is designed specifically to protect sensitive
electronic equipment from voltage transients induced by
lightning and other transient voltage events.
SMBJ6.8A/CA
Features
l
Very fast response time
l
Halogen free and RoHS compliant
l
Low incremental surge resistance
l
Optimized for LAN protection applications
l
Matte tin lead–free Plated
l
For surface mounted applications to optimize board space
l
600W peak pulse power capability with at 10/1000μs
waveform, repetition rate (duty cycle): 0.01%
l
High temperature soldering:260°C/10 seconds at terminals
UNI
Cathode
BI
Electrical symbol
Anode
Part Number Code
S
M
B
J
x
x
Reverse
Stand-Off
Voltage
x
C
A
Series code
5% Voltage
Tolerance
Blank:Uni-Directional
C:Bi-Directional
Mechanical Characteristics
Rating
Peak Pulse Power Dissipation at T
A
=25ºC by 10/1000μs Waveform (Fig.2)(Note
1), (Note 2)
Power Dissipation on Infinite Heat Sink at T
L
=50°C
Peak Forward Surge Current, 8.3ms Single Half Sine Wave (Note 3)
Operating Temperature Range
Storage Temperature Range
Symbol
P
PP
P
D
I
FSM
T
J
T
STG
Value
600
5.0
100
-55 to 150
-55 to 150
Units
W
W
A
°C
°C
Notes:
1. Non-repetitive current pulse, per Fig.4 and derated above T
A
=25ºC per Fig. 3.
2. Mounted on 5.0x5.0mm copper pad to each terminal.
3. Measured on 8.3ms single half sine wave or equivalent square wave for unidirectional device only, duty cycle=4 per minute maximum.
Specifications are subject to change without notice.
Please refer to http://
www.ruilon.com.cn
for current information.
Revised: 2018-07-11
Page:1
Transient Voltage Suppressors (TVS)
Electrical Characteristics
Reverse
Stand-Off
Voltage
V
RWM
UNI
SMBJ6.8A
BI
SMBJ6.8CA
UNI
6.8A
BI
6.8CA
V
5.8
Breakdown
Voltage
V
BR
@I
T
Min
V
6.45
Max
V
7.14
Test
Current
SMBJ6.8A/CA
Type Number
Marking
Max.
Max.
Reverse
Clamping Peak Pulse
Leakage
Voltage
Current
V
C
@I
PP
V
10.5
I
PP
A
57.0
I
R
@V
RWM
µA
1000
I
T
mA
10
Notes: For bidirectional type having V
R
of 10V and less, the I
R
limit is double.
I-V Curve Characteristics
Uni-directional
I
Bi-directional
I
PP
V
C
V
BR
V
R
I
R
V
F
I
T
V
V
C
V
BR
V
R
I
T
I
R
I
R
I
T
V
R
V
BR
V
C
V
I
PP
I
PP
P
PPM
Peak Pulse Power Dissipation -- Max power dissipation
V
R
Stand-off Voltage -- Maximum voltage that can be applied to the TVS without operation
V
BR
Breakdown Voltage -- Maximum voltage that flows though the TVS at a specified test current (I
T
)
V
C
Clamping Voltage -- Peak voltage measured across the TVS at a specified Ippm (peak impulse current)
I
R
Reverse Leakage Current -- Current measured at V
R
V
F
Forward Voltage Drop for Uni-directional
Ratings and Characteristic Curves
(T
A
=25°C unless otherwise noted)
Figure 1 - TVS Transients Clamping Waveform
Figure 2 - Peak Pulse Power Rating Curve
Voltage Transients
P
PPM
-Peak Pulse Power (kW)
100
T
J
initial = T
amb
Voltage or Current
Voltage Across TVS
10
stacked-die, 800W
at 10x1000μs, 25°C
Current Through TVS
1
Single die, 600W
at 10x1000μs, 25°C
0.1
Time
0.001
0.01
0.1
1
10
t
d
-Pulse Width (ms)
Specifications are subject to change without notice.
Please refer to http://
www.ruilon.com.cn
for current information.
Revised: 2018-07-11
Page:2
Transient Voltage Suppressors (TVS)
Figure 3 - Pulse Derating Curve
Figure 4 - Pulse Waveform
SMBJ6.8A/CA
Peak Pulse Power (P
PP
) or Current (I
PP
)
Derating in Percentage %
100
I
PPM
- Peak Pulse Cur rent, % I
RSM
150
t
r
=10μsec
Peak Value
IPPM
T
J
=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of I
PPM
80
60
100
40
Half Value
IPPM (
I
PPM
)
2
50
20
10/1000μsec.Waveform
as defined by R.E.A
0
0
25
50
75
100
125
150
175
T
A
-Ambient temperature (ºC)
t
d
0
0
1.0
2.0
t-Time(ms)
3.0
4.0
Figure 5 - Typical Junction Capacitance
Figure 6 - Steady State Power Derating Curve
10000
Bi-directional V=0V
P
M(AV),
Steady State Power Dissipation (W)
5.0
4.0
3.0
2.0
1.0
0.0
0
25
50
75
100 125 150
T
L
-Lead Temperature(ºC)
175
200
60Hz Resistive or
Inductive Load
1000
Uni-directional V=0V
Uni-directional @V
R
Cj (pF)
100
10
Tj=25ºC
f=1.0MHz
Vsig=50mVp-p
Bi-directional @V
R
1
1.0
10.0
100.0
1000.0
V
BR
- Reverse Breakdown Voltage (V)
Figure 7 - Maximum Non-Repetitive Surge Current
120
I
FSM
- Peak Forward Surve Current
(A)
100
80
60
40
20
0
Pulse Width 8.3ms
Single Half-Sine-Wave
(JEDEC METHOD)
1
10
Number of Cycles at 60 Hz
100
Specifications are subject to change without notice.
Please refer to http://
www.ruilon.com.cn
for current information.
Revised: 2018-07-11
Page:3
Transient Voltage Suppressors (TVS)
Soldering Parameters - Reflow Soldering (Surface Mount Devices)
Reflow Condition
T
P
Ramp-up
Critical Zone
T
L
to T
P
SMBJ6.8A/CA
Pb - Free assembly
150°C
200°C
60 -180 Seconds
3°C/second max
3°C/second max
217°C
60 -150 Seconds
260 +0/-5°C
20 - 40 Seconds
6°C/second max
8 minutes Max
260°C
-Temperature Min (T
s(min)
)
Pre
Heat
-Temperature Max (T
s(max)
)
- Time (min to max) (t
s
)
Ramp-down
T
L
T
S(max)
Temperature
Average ramp up rate ( Liquids
Temp T
L
) to peak
T
S(max)
to TL - Ramp-up Rate
T
S(min)
Preheat
25
Time to peak temperature
(t 25℃ to peak)
Reflo
w
Time
- Temperature (T
L
)
(Liquids)
- Time (min to max) (t
s
)
Peak Temperature (T
P
)
Time within 5°C of actual peak
Temperature (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
Part Marking System
Cathode band
(
for Uni-directional products only
)
RUILON
XXX XXX
Date Code
Product Code
Marking code
Dimensions
Cathode Band
DIM
Min
A
B
C
D
E
G
I
J
K
L
1.95
4.06
3.30
2.13
0.76
5.11
2.26
2.16
-
2.16
Max
2.20
4.57
3.94
2.44
1.52
5.49
-
-
2.74
-
Min
0.077
0.160
0.130
0.084
0.030
0.201
0.089
0.085
-
0.085
Max
0.086
0.180
0.155
0.096
0.060
0.216
-
-
0.107
-
Millimeters
Inches
Specifications are subject to change without notice.
Please refer to http://
www.ruilon.com.cn
for current information.
Revised: 2018-07-11
Page:4
Transient Voltage Suppressors (TVS)
Taping and Reel Specifications
Symbol
W
P
F
E
D
P0
P2
D0
D1
D2
W1
Millimeters
12±0.3
8±0.1
5.5±0.1
1.75±0.1
1.5+0.1/-0.0
4±0.1
2±0.1
16.7±0.15
178±2
59.6+1/-2
12.64±0.4
SMBJ6.8A/CA
Inches
0.472±0.012
0.315±0.004
0.217±0.004
0.069±0.004
0.059+0.004/-0.0
0.157±0.004
0.079±0.004
0.657±0.006
7.007±0.079
2.346+0.039/-0.079
0.498±0.016
Direction of Unreeling
Part Number
SMBJ6.8A/CA
Component
package
DO-214AA
Quantity
500
Packaging option
Tape&Reel-12mm/7”tape
Packaging specification
EIA STD RS-481
Specifications are subject to change without notice.
Please refer to http://
www.ruilon.com.cn
for current information.
Revised: 2018-07-11
Page:5
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