Revision: November 17, 2011, 16:25
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
Transient Voltage Suppression Diodes
1
SMAJ Series
Surface Mount – 400W > SMAJ series
Please refer to http://www.Littelfuse.com/series/SMAJ.html for current information.
SMAJ Series
Description
Agency Approvals
AGENCY AGENCY FILE NUMBER
E230531
Features
Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Parameter Symbol Value Unit
Peak Pulse Power Dissipation at
TA=25ºC by 10x1000µs waveform
(Fig.1)(Note 1), (Note 2)
PPPM 400 W
Power Dissipation on infinite heat
sink at TA=50OCPM(AV) 3.3 W
Peak Forward Surge Current, 8.3ms
Single Half Sine Wave (Note 3) IFSM 40 A
Maximum Instantaneous Forward
Voltage at 25A for Unidirectional
only (Note 4)
VF3.5V/6.5 V
Operating Junction and Storage
Temperature Range TJ, TSTG -65 to 150 °C
Typical Thermal Resistance Junction
to Lead RuJL 30 °C/W
Typical Thermal Resistance Junction
to Ambient RuJA 120 °C/W
Notes:
1. Non-repetitive current pulse, per Fig.3 and derated above TA=25ºC per Fig. 2.
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.
4. VF < 3.5V for VBR _
<
200V and VF< 6.5V for VBR _
>
201V.
The SMAJ series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Applications
TVS devices are ideal for the protection of I/O Interfaces,
VCC bus and other vulnerable circuits used in Telecom,
Computer, Industrial and Consumer electronic applications.
• Halogen-Free
• RoHS compliant
For surface mounted
applications to optimize
board space
• Low prole package
• Built-in strain relief
• Glass passivated junction
• Low inductance
Excellent clamping
capability
400W Peak Pulsepower
capability at 10 x 1000µs
waveform, repetition rate
(duty cycle): 0.01%
Fast response time:
typically less than 1.0ps
from 0 Volts to VBR min
Typical IR less than 1µA
above 12V
High temperature
soldering: 260°C/40
seconds at terminals
Typical maximum
temperature coefficient
ΔVBR = 0.1% x VBR@25°C x ΔT
Plastic package has
Underwriters Laboratory
Flammability 94V-O
Matte Tin Lead–free
Plated
SMAJ Series
RoHS
Pb
Revision: November 17, 2011, 16:25
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
Transient Voltage Suppression Diodes
2
SMAJ Series
Surface Mount – 400W > SMAJ series
Please refer to http://www.Littelfuse.com/series/SMAJ.html for current information.
Electrical Characteristics
Part
Number
(Uni)
Part
Number
(Bi)
Marking Reverse
Stand off
Voltage VR
(Volts)
Breakdown
Voltage VBR
(Volts) @ IT
Test
Current
IT
(mA)
Maximum
Clamping
Voltage VC
@ Ipp
(V)
Maximum
Peak
Pulse
Current Ipp
(A)
Maximum
Reverse
Leakage IR
@ VR
(µA)
Agency
Approval
UNI BI MIN MAX
SMAJ5.0A SMAJ5.0CA AE WE 5.0 6.40 7.00 10 9.2 43.5 800 X
SMAJ6.0A SMAJ6.0CA AG WG 6.0 6.67 7.37 10 10.3 38.8 800 X
SMAJ6.5A SMAJ6.5CA AK WK 6.5 7.22 7.98 10 11. 2 35.7 500 X
SMAJ7.0A SMAJ7.0CA AM WM 7. 0 7.78 8.60 10 12.0 33.3 200 X
SMAJ7.5A SMAJ7.5CA AP WP 7. 5 8.33 9.21 1 12.9 31.0 100 X
SMAJ8.0A SMAJ8.0CA AR WR 8.0 8.89 9.83 1 13.6 29.4 50 X
SMAJ8.5A SMAJ8.5CA AT WT 8.5 9.44 10.40 1 14.4 27.8 20 X
SMAJ9.0A SMAJ9.0CA AV WV 9.0 10.00 11.10 1 15.4 26.0 10 X
SMAJ10A SMAJ10CA AX WX 10.0 11.10 12.30 1 1 7. 0 23.5 5 X
SMAJ11A SMAJ11CA AZ WZ 11. 0 12.20 13.50 1 18.2 22.0 1 X
SMAJ12A SMAJ12CA BE XE 12.0 13.30 14.70 1 19.9 20.1 1 X
SMAJ13A SMAJ13CA BG XG 13.0 14.40 15.90 1 21.5 18.6 1 X
SMAJ14A SMAJ14CA BK XK 14.0 15.60 17.20 1 23.2 1 7. 2 1 X
SMAJ15A SMAJ15CA BM XM 15.0 16.70 18.50 1 24.4 16.4 1 X
SMAJ16A SMAJ16CA BP XP 16.0 17.80 19.70 1 26.0 15.4 1 X
SMAJ17A SMAJ17CA BR XR 1 7. 0 18.90 20.90 1 27.6 14.5 1 X
SMAJ18A SMAJ18CA BT XT 18.0 20.00 22.10 1 29.2 13.7 1 X
SMAJ20A SMAJ20CA BV XV 20.0 22.20 24.50 1 32.4 12.3 1 X
SMAJ22A SMAJ22CA BX XX 22.0 24.40 26.90 1 35.5 11. 3 1 X
SMAJ24A SMAJ24CA BZ XZ 24.0 26.70 29.50 1 38.9 10.3 1 X
SMAJ26A SMAJ26CA CE YE 26.0 28.90 31.90 1 42.1 9.5 1 X
SMAJ28A SMAJ28CA CG YG 28.0 31.10 34.40 1 45.4 8.8 1 X
SMAJ30A SMAJ30CA CK YK 30.0 33.30 36.80 1 48.4 8.3 1 X
SMAJ33A SMAJ33CA CM YM 33.0 36.70 40.60 1 53.3 7. 5 1 X
SMAJ36A SMAJ36CA CP YP 36.0 40.00 44.20 1 58.1 6.9 1 X
SMAJ40A SMAJ40CA CR YR 40.0 44.40 49.10 1 64.5 6.2 1 X
SMAJ43A SMAJ43CA CT YT 43.0 47.80 52.80 1 69.4 5.8 1 X
SMAJ45A SMAJ45CA CV YV 45.0 50.00 55.30 1 72.7 5.5 1 X
SMAJ48A SMAJ48CA CX YX 48.0 53.30 58.90 1 77.4 5.2 1 X
SMAJ51A SMAJ51CA CZ YZ 51.0 56.70 62.70 1 82.4 4.9 1 X
SMAJ54A SMAJ54CA RE ZE 54.0 60.00 66.30 1 87.1 4.6 1 X
SMAJ58A SMAJ58CA RG ZG 58.0 64.40 71.20 1 93.6 4.3 1 X
SMAJ60A SMAJ60CA RK ZK 60.0 66.70 73.70 1 96.8 4.1 1 X
SMAJ64A SMAJ64CA RM ZM 64.0 71.10 78.60 1 103.0 3.9 1 X
SMAJ70A SMAJ70CA RP ZP 70.0 77.80 86.00 1 113.0 3.5 1 X
SMAJ75A SMAJ75CA RR ZR 75.0 83.30 92.10 1 121.0 3.3 1 X
SMAJ78A SMAJ78CA RT ZT 78.0 86.70 95.80 1 126.0 3.2 1 X
SMAJ85A SMAJ85CA RV ZV 85.0 94.40 104.00 1 137.0 2.9 1 X
SMAJ90A SMAJ90CA RX ZX 90.0 100.00 111.0 0 1 146.0 2.7 1 X
SMAJ100A SMAJ100CA RZ ZZ 100.0 111.0 0 123.00 1 162.0 2.5 1 X
SMAJ110A SMAJ110CA SE VE 110.0 122.00 135.00 1 177.0 2.3 1 X
SMAJ120A SMAJ120CA SG VG 120.0 133.00 147.00 1 193.0 2.1 1 X
SMAJ130A SMAJ130CA SK VK 130.0 144.00 159.00 1 209.0 1. 9 1 X
SMAJ150A SMAJ150CA SM VM 150.0 167.00 185.00 1 243.0 1. 6 1 X
SMAJ160A SMAJ160CA SP VP 160.0 178.00 197.00 1 259.0 1. 5 1 X
SMAJ170A SMAJ170CA SR VR 170.0 189.00 209.00 1 275.0 1. 5 1 X
SMAJ180A SMAJ180CA ST VT 180.0 201.00 222.00 1 292.0 1. 4 1
SMAJ200A SMAJ200CA SV VV 200.0 224.00 247.00 1 324.0 1. 2 1
SMAJ220A SMAJ220CA SX VX 220.0 246.00 272.00 1 356.0 1. 1 1
SMAJ250A SMAJ250CA SZ VZ 250.0 279.00 309.00 1 405.0 1. 0 1
SMAJ300A SMAJ300CA TE UE 300.0 335.00 371.00 1 486.0 0.8 1
SMAJ350A SMAJ350CA TG UG 350.0 391.00 432.00 1 567.0 0.7 1
SMAJ400A SMAJ400CA TK UK 400.0 447.00 494.00 1 648.0 0.6 1
SMAJ440A SMAJ440CA TM UM 440.0 492.00 543.00 1 713.0 0.6 1
For bidirectional type having VRWM of 10 volts and less, the IR limit is double.
For parts without A (VBR is ± 10% and VC is 5% higher than with A parts).
Revision: November 17, 2011, 16:25
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
Transient Voltage Suppression Diodes
3
SMAJ Series
Surface Mount – 400W > SMAJ series
Please refer to http://www.Littelfuse.com/series/SMAJ.html for current information.
Ratings and Characteristic Curves (TA=25°C unless otherwise noted)
0
20
40
60
80
100
0255075100 125150 175
TA-Ambient temperature (ºC)
Peak Pulse Power (PPP) or Current (IPP)
Derating in Percentage %
1
10
100
1000
10000
1.010.0100.01000.0
Cj (pF)
Tj=2C
f=1.0MHz
Vsig=50mVp-p
Uni-directional V=0V
Bi-directional V=0V
Uni-directional @V
R
Bi-directional @V
R
V
BR
- Reverse Breakdown Voltage (V)
0.1
1
10
0.0000010.000010.0001 0.001
td-Pulse Width (sec.)
PPPM-Peak Pulse Power (kW)
0.2x0.2" (5.0x5.0mm)
Copper Pad Area
Figure 1 - Peak Pulse Power Rating Curve Figure 2 - Pulse Derating Curve
IPPM- Peak Pulse Current, % IRSM
0
0
50
100
150
1.0 2.0 3.0 4.0
tr=10µsec
Peak Value
IPPM
IPPM
2
TJ=25°C
Pulse Width(td) is defined
as the point where the peak
current decays to 50% of IPPM
10/1000µsec. Waveform
as defined by R.E.A
td
t-Time (ms)
Half Value
IPPM ( )
Figure 3 - Pulse Waveform Figure 4 - Typical Junction Capacitance
0255075100 125 150 175
PM(AV), Steady State Power Dissipation (W)
TA - Ambient Te mperature (ºC)
bargaining
3.0
0.6
1.2
1.8
3.6
2.4
0
Figure 5 - Steady State Power Dissipation Derating
Curve
0
5
10
15
20
25
30
35
40
45
110100
Number of Cycles at 60 Hz
IFSM - Peak Forward Surve Current
(A)
Figure 6 - Maximum Non-Repetitive Forward Surge
Current Uni-Directional Only
Revision: November 17, 2011, 16:25
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
Transient Voltage Suppression Diodes
4
SMAJ Series
Surface Mount – 400W > SMAJ series
Please refer to http://www.Littelfuse.com/series/SMAJ.html for current information.
Dimensions
Physical Specifications
Weight 0.002 ounce, 0.061 gram
Case JEDEC DO-214AC Molded Plastic over
glass passivated junction
Polarity Color band denotes cathode except Bipolar
Terminal Matte Tin-plated leads, Solderable per
JESD22-B102D
Dimensions Inches Millimeters
Min Max Min Max
A 0.049 0.065 1.250 1.650
B 0.157 0.177 3.990 4.500
C 0.100 0.110 2.540 2.790
D 0.078 0.090 1.980 2.290
E0.030 0.060 0.780 1.520
F - 0.008 - 0.203
G 0.194 0.208 4.930 5.280
H 0.006 0.012 0.152 0.305
I 0.070 - 1.800 -
J 0.082 - 2.100 -
K - 0.090 - 2.300
L 0.082 - 2.100 -
Environmental Specifications
Temperature Cycle JESD22-A104
Pressure Cooker JESD22-A102
High Temp. Storage JESD22-A103
HTRB JESD22-A108
Thermal Shock JESD22-A106
Soldering Parameters
Temperature (T)
Time (t)
Ts(min)
Ts(max)
TL
TP
ts
Preheat
tL
tp
Ramp-up Critical Zone
TL to TP
Ramp-down
t 25˚C to Peak
25˚C
Reflow Condition Lead–free assembly
Pre Heat
- Temperature Min (Ts(min))150°C
- Temperature Max (Ts(max))200°C
- Time (min to max) (ts)60 – 180 secs
Average ramp up rate (Liquidus Temp
(TL) to peak 3°C/second max
TS(max) to TL - Ramp-up Rate 3°C/second max
Reflow - Temperature (TL) (Liquidus) 217°C
- Time (min to max) (ts)60 – 150 seconds
Peak Temperature (TP)260+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)20 – 40 seconds
Ramp-down Rate 6°C/second max
Time 25°C to peak Temperature (TP)8 minutes Max.
Do not exceed 280°C
Cathode Band
A
D
EG
F
H
C
B
(all dimensions in mm)
I
L
K
J
Solder Pads
Revision: November 17, 2011, 16:25
©2011 Littelfuse, Inc.
Specifications are subject to change without notice.
Transient Voltage Suppression Diodes
5
SMAJ Series
Surface Mount – 400W > SMAJ series
Please refer to http://www.Littelfuse.com/series/SMAJ.html for current information.
Part Numbering System
VOLTAGE
BI-DIRECTIONAL
5% VOLTAGE TOLERANCE
SMAJ XXX C A
SERIES
Part Marking System
Packaging
F
XX
Marking Code
Littelfuse Logo
Cathode Band
XXXXX
Trace Code Marking
Tape and Reel Specification
0.47
(12.0)
0.157
(4.0)
0.157
(4.0)
0.49
(12.5)
0.80 (20.2)
Arbor Hole Dia.
13.0 (330)
Dimensions are in inches
(and millimeters).
Direction of Feed
0.059 DIA
(1.5) Cover tape
Part number Component
Package Quantity Packaging
Option
Packaging
Specification
SMAJ-xxxXX DO-214AC 5000 Tape & Reel - 12mm/13” tape EIA STD RS-481
Cathode