SMAJ5.0A-TR,CA-TR
SMAJ188A-TR,CA-TR
TRANSILTM
®
PEAK PULSE POW ER : 400 W (10/1000µs)
STAND OFF VOLTAGE RANGE :
From 5V to 188V.
UNI AND B IDIRECT IONAL TYPES
LOW CLA MPING FACTO R
FAST RESPONSE TIME
JEDEC REGISTERED PACKAGE OUTLINE
FEATURES
SMA
(JEDEC D0214 AC)
Symbol Parameter Value Unit
PPP Peak pulse power dissipation (see note 1) Tj initial = Tamb 400 W
P Power dissipation on infinite heatsink Tamb = 50°C3.3W
I
FSM Non repetitive surge peak forward
current for unidirectional types tp = 10m s
Tj initial = Tamb 40 A
Tstg
TjStorage temperature range
Maximum junc tion t emperature - 65 to + 175
150 °C
°C
TLMaximum lead temperature for soldering during 10 s . 260 °C
Note 1 : For a surge great er than the maximum valu es, the diode wil l fail in short-ci rcuit.
AB SOL UTE M AXIMU M RA TIN GS (Tamb = 25°C)
DESCRIPTION
The SMAJ series are TRANSILTM diodes designed
specifically for protecting sensitive equipment
against transient overvoltages. The SMA package
allows save spacing on high density printed circuit
boards.
Transil diodes provide high overvoltage protection
by clamping action. Their instantaneous response
to transient overvol tages makes them particularly
suited to protect voltage sensitive devices such
as MOS Technology and low voltage supplied
IC’s.
September 1998 Ed: 5A
Symbol Parameter Value Unit
Rth (j-l) Junction to leads 30 °C/W
Rth (j-a) Junction to ambient on printed circ uit on recommended pad
layout 120 °C/W
THER MAL RE SISTA NC ES
1/5
I
IF
VF
VVCL VBR
VRM
IPP
IRM V
Symbol Parameter
VRM Stand-off voltage
VBR Breakdown voltage
VCL Clamping voltage
IRM Leakage current @ VRM
IPP Peak puls e current
αT Voltage temperature c oefficient
VFForward voltage drop
ELECTRICAL CHARACTERISTICS (Tamb = 25° C)
Types IRM @ VRM VBR @ IRVCL @ IPP VCL @ IPP αTC
max min max max max typ
note2 10/1000µs 8/20µs note3 note4
Unidirectional Mark. Bidirectional Mark. µAV VmAV A V A10
-4/°CpF
SMAJ5.0A-TR AE SMAJ5.0CA-TR AA 800 5.0 6.4 10 9.2 43.5 13.4 174 5.7 3500
SMAJ6.0A-TR DUB SMAJ6.0CA-TR DBB 800 6.0 6.7 10 10.3 38.8 13.7 170 5.9 3300
SMAJ6.5A-TR DUC SMAJ6.5CA-TR DBC 500 6.5 7.2 10 11.2 35.7 14.5 160 6.1 3100
SMAJ8.5A-TR DUH SMAJ8.5CA-TR DBH 10 8.5 9.44 1 14.4 27.7 18.6 124 7.3 2000
SMAJ10A-TR AX SMAJ10CA-TR AC 5 10 11.1 1 17 23.5 21.7 106 7.8 1550
SMAJ12A-TR DUK SMAJ12CA-TR DBK 5 12 13.3 1 19.9 20.1 25.3 91 8.3 1325
SMAJ13A-TR BG SMAJ13CA-TR BH 1 13 14.4 1 21.5 18.6 27.2 85 8.4 1200
SMAJ15A-TR BM SMAJ15CA-TR AJ 1 15 16.7 1 24.4 16.4 32.5 71 8.8 975
SMAJ18A-TR DUQ SMAJ18CA-TR DBQ 1 18 20 1 29.2 13.7 39.3 59 9.2 800
SMAJ20A-TR DUR SMAJ20CA-TR DBR 1 20 22.2 1 32.4 12.3 42.8 54 9.4 725
SMAJ22A-TR DUS SMAJ22CA-TR DBS 1 22 24.4 1 35.5 11.2 48.3 48 9.6 625
SMAJ24A-TR DUT SMAJ24CA-TR DBT 1 24 26.7 1 38.9 10.3 50 46 9.6 600
SMAJ26A-TR DUU SMAJ26CA-TR DBU 1 26 28.9 1 42.1 9.5 53.5 43 9.7 575
SMAJ28A-TR CG SMAJ28CA-TR CH 1 28 31.1 1 45.4 8.8 59 39 9.8 510
SMAJ30A-TR CK SMAJ30CA-TR CL 1 30 33.3 1 48.4 8.3 64.3 36 9.9 480
SMAJ33A-TR CM SMAJ33CA-TR CN 1 33 36.7 1 53.3 7.5 69.7 33 10.0 450
SMAJ40A-TR DUZ SMAJ40CA-TR DBZ 1 40 44.4 1 64.5 6.2 84 27 10.1 370
SMAJ43A-TR EUA SMAJ43CA-TR EBA 1 43 47.8 1 69.4 5.7 91 25 10.2 350
SMAJ48A-TR CX SMAJ48CA-TR CY 1 48 53.3 1 77.4 5.2 100 23 10.3 320
SMAJ58A-TR EUF SMAJ58CA-TR EBF 1 58 64.4 1 93.6 4.3 121 19 10.4 270
SMAJ70A-TR EUI SMAJ70CA-TR EBI 1 70 77.8 1 113 3.5 146 16 10.5 230
SMAJ85A-TR EUL SMAJ85CA-TR EBL 1 85 94.4 1 137 2.9 178 13 10.6 200
SMAJ100A-TR EUN SMAJ100CA-TR EBN 1 100 111 1 162 2.5 212 11 10.7 170
SMAJ130A-TR EUQ SMAJ130CA-TR EBQ 1 130 144 1 209 1.9 265 9 10.8 145
SMAJ154A-TR EUT SMAJ154CA-TR EBT 1 154 171 1 246 1.6 317 7 10.8 125
SMAJ170A-TR SR SMAJ170CA-TR SS 1 170 189 1 275 1.4 353 6.5 10.8 120
SMAJ188A-TR EUV SMAJ188CA-TR EBV 1 188 209 1 328 1.4 388 6 10.8 110
No te 2 :Pulse test : tp < 50 ms.
No te 3 :∆VBR = αT * (Tamb - 25) * VBR(25°C).
No te 4 :VR = 0 V, F = 1 MHz. For bidirectional types,
capacitance value is divided by 2.
10 s
1000 s
%I
PP
50
0t
PULSE WAVEFORM 10/1000 s
100
SM AJxxxA-TR, CA-TR
2/5
0 25 50 75 100 125 150 175
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1 Ppp[Tj initial]/Ppp[Tj initial=25°C]
Tj initial(°C)
Fig 1: Peak power dissipation versus initial
junction temperature.
0.01 0.10 1.00 10.00
100
1000
5000 Ppp(W)
tp(ms)
Fig 2: Peak pulse power versus exponential pulse
duration (Tj initial=25° C ).
1 10 100 500
0.1
1.0
10.0
100.0
200.0 Ipp(A)
tp=20µs
tp=1ms
SMAJ5.0A,CA
SMAJ188A,CA
SMAJ58A,CA
SMAJ26A,CA
SMAJ13A,CA
V (V)
CL
Fig 3: Clam ping voltage v ersus peak puls e current
(Tj initial=25°C)
Exponential waveform tp=20 µs & tp=1ms.
1 10 100 200
10
100
1000
5000 C(pF)
F=1MHz
SMAJ5.0A
SMAJ188A
SMAJ58A
SMAJ26A
SMAJ13A
V (V)
R
Fig 4-1: Capacitance versus reverse applied
voltage (typical values) (SMAJxxA) .
1 10 100 200
1
10
100
1000
2000
F=1MHz
SMAJ5.0CA
SMAJ188CA
SMAJ58CA
SMAJ26CA
SMAJ13CA
C(pF)
V (V)
R
Fig 4-2: Capacitance versus reverse applied
voltage (typical values) (SMAJxxCA ).
SMAJxxxA-TR , CA-T R
3/5
0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4
0.01
0.10
1.00
10.00 I (A)
FM
Tj=25°C
Tj=125°C
V (V)
FM
Fig 5: Peak forward voltage drop versus peak
forward current (ty pical values).
1E-2 1E-1 1E+0 1E+1 1E+2 5E+2
0.01
0.10
1.00 Zth(j-a)/Rth(j-a)
tp(s)
Fig 6: Relative variation of thermal impedance
junction t o am bient ver sus puls e dur ation.
012345
40
50
60
70
80
90
100
110
120
130
140 Rth(j-a) (°C/W)
S(Cu)(cm²)
Fig 7: Thermal resistance junction to ambient
versus copper surface under each lead
(printed circuit boar d F R4 e(C u)=35µm).
0 25 50 75 100 125 150
1E-1
1E+0
1E+1
1E+2
1E+3
2E+3 I [Tj] / I [Tj=25°C]
RR
V < 8.5V
BR
Tj(°C)
V 8.5V
BR ≥
Fig 8: Relative variation of leakage current versus
junction temperature.
SM AJxxxA-TR, CA-TR
4/5
REF.
DIMENSIONS
Millimeters Inches
Min. Max. Min. Max.
A1 1.90 2.70 0.075 0.106
A2 0.05 0.20 0.002 0.008
b 1.25 1.65 0.049 0.065
c 0.15 0.41 0.006 0.016
E 4.80 5.60 0.189 0.220
E1 3.95 4.60 0.156 0.181
D 2.25 2.95 0.089 0.116
L 0.75 1.60 0.030 0.063
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for
the consequences of use of such information nor for any infringement of patents or other rights of third parties which may
result from its use. No license is granted by implication or otherwise under any patent or patent righ ts of STMicroelectronics.
Specificatio ns mentioned in thi s publication ar e subject to change wi thout notice. This publicati on supersedes and re places
all infor mation previo usly supplie d.
STMicroelectronics products are not authorized for use as critical components in life support devices or systems w ithout
express written app roval of STMicroe lectronics.
The ST logo is a registere d trademark of STMicro electroni cs
© 1998 STMicroelectroni cs - Printed i n Italy - Al l rights r eserved.
STMicroelectronics GROUP OF COMPANIES
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The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
Packaging : standard packaging i s in tape and reel.
PACKAGE MECHANICAL DAT A
SMA (Plastic)
E
C
L
E1
D
A1
A2
b
MARKING : Logo, Date Code, Ty pe Code, Cathode Band (for unidirec tional types only).
FOOTPRINT DIMENSIONS (Millimeter)
SMA Plastic.
2.40
1.65
1.45 1.45
Weight = 0.068 g
ORDER CO DE
SM A J 85 C A - TR
BIDIRECTIONAL
No suffix : Unidirectiona l
SURFACE MOUNT
STAND OFF VOLTAGE
400 WATTS
TAPE & REEL
SMAJxxxA-TR , CA-T R
5/5
