SMAJ
TRANSILTM
FEATURES Peak Pulse Power : 400 W (10/1000s) Stand off voltage range: From 5V to 188V Uni and Bidirectional types Low clamping factor Fast response time JEDEC registered package outline 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 overvoltages makes them particularly suited to protect voltage sensitive devices such as MOS Technology and low voltage supplied IC's. Table 2: Absolute Maximum Rating (Tamb = 25C) Symbol PPP P IFSM Tstg Tj TL Parameter Peak pulse power dissipation (see note 1) Power dissipation on infinite heatsink Non repetitive surge peak forward current for unidirectional types Storage temperature range Maximum junction temperature Maximum lead temperature for soldering during 10 s.
A K
Unidirectional
Bidirectional
SMA (JEDEC DO-214AC) Table 1: Order Codes Part Number SMAJxxxA-TR SMAJxxxCA-TR Marking See page 2 See page 2
Value Tj initial = Tamb Tamb = 50C tp = 10 ms Tj initial = Tamb 400 3.3 40 -65 to 175 150 260
Unit W W A C C
Note 1: for a surge greater than the maximum values, the diode will fail in short-circuit.
Table 3: Thermal Resistances Symbol Parameter Rth(j-l) Junction to leads Rth(j-a) Junction to ambient on printed circuit on recommended pad layout Value 30 120 Unit C/W C/W
February 2006
REV. 8
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Table 4: Electrical Characteristics (Tamb = 25C) Symbol V RM VBR V CL IR M IPP T VF Parameter Stand-off voltage
IF I
I IPP
Breakdown voltage Clamping voltage
VCL VBR VRM VF IRM IR V
Leakage current Peak pulse current Voltage temperature coefficient Forward voltage drop
VCLVBR VRM
IR IRM IRM IR
V VRMVBR VCL
IPP
Unidirectional
IPP
Bidirectional
IRM @ VRM VBR @ IR Types Unidirectional SMAJ5.0A-TR SMAJ6.0A-TR SMAJ6.5A-TR SMAJ8.5A-TR SMAJ10A-TR SMAJ12A-TR SMAJ13A-TR SMAJ15A-TR SMAJ18A-TR SMAJ20A-TR SMAJ22A-TR SMAJ24A-TR SMAJ26A-TR SMAJ28A-TR SMAJ30A-TR SMAJ33A-TR SMAJ40A-TR SMAJ43A-TR SMAJ48A-TR SMAJ58A-TR SMAJ70A-TR SMAJ85A-TR SMAJ100A-TR SMAJ130A-TR SMAJ154A-TR SMAJ170A-TR SMAJ188A-TR
Note 2: Note 3: Note 4:
VCL @ IPP
VCL @ IPP
T
max note3
C typ note4 pF 3500 3300 3100 2000 1550 1325 1200 975 800 725 625 600 575 510 480 450 370 350 320 270 230 200 170 145 125 120 110
max Mark. AA DBB DBC DBH AC DBK BH AJ DBQ DBR DBS DB T DBU CH CL CN DB Z EBA CY EBF EBI EBL EBN EBQ EBT SS EBV A 800 800 500 10 5 5 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 V 5.0 6.0 6.5 8.5 10 12 13 15 18 20 22 24 26 28 30 33 40 43 48 58 70 85 100 130 154 170 188
m in note2 V 6.4 6.7 7.2 9.44 11.1 13.3 14.4 16.7 20 22.2 24.4 26.7 28.9 31.1 33.3 36.7 44.4 47.8 53.3 64.4 77.8 94.4 111 144 171 189 209 mA 10 10 10 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
max max 10/1000s 8/20s V 9.2 10.3 11.2 14.4 17 19.9 21.5 24.4 29.2 32.4 35.5 38.9 42.1 45.4 48.4 53.3 64.5 69.4 77.4 93.6 113 137 162 209 246 275 328 A 43.5 38.8 35.7 27.7 23.5 20.1 18.6 16.4 13.7 12.3 11.2 10.3 9.5 8.8 8.3 7.5 6.2 5.7 5.2 4.3 3.5 2.9 2.5 1.9 1.6 1.4 1.4 V 13.4 13.7 14.5 18.6 21.7 25.3 27.2 32.5 39.3 42.8 48.3 50 53.5 59 64.3 69.7 84 91 100 121 146 178 212 265 317 353 388 A
Ma rk . AE DUB DUC DUH AX DUK BG BM DU Q DUR DUS DUT DUU CG CK CM DUZ EUA CX EUF EUI EUL E UN EUQ E UT SR E UV
Bidirectional SMAJ5.0CA-TR SMAJ6.0CA-TR SMAJ6.5CA-TR SMAJ8.5CA-TR SMAJ10CA-TR SMAJ12CA-TR SMAJ13CA-TR SMAJ15CA-TR SMAJ18CA-TR SMAJ20CA-TR SMAJ22CA-TR SMAJ24CA-TR SMAJ26CA-TR SMAJ28CA-TR SMAJ30CA-TR SMAJ33CA-TR SMAJ40CA-TR SMAJ43CA-TR SMAJ48CA-TR SMAJ58CA-TR SMAJ70CA-TR SMAJ85CA-TR SMAJ100CA-TR SMAJ130CA-TR SMAJ154CA-TR SMAJ170CA-TR SMAJ188CA-TR
10-4/C 174 5.7 170 5.9 160 6.1 124 7.3 106 7.8 91 8.3 85 8.4 71 8.8 59 9.2 54 9.4 48 9.6 46 9.6 43 9.7 39 9.8 36 9.9 33 10.0 27 10.1 25 10.2 23 10.3 19 10.4 16 10.5 13 10.6 11 10.7 9 10.8 7 10.8 6.5 10.8 6 10.8
VBR = T * (Tamb - 25) * VBR(25C).
VR = 0 V, F = 1 MHz. For bidirectional types, capacitance value is divided by 2.
Pulse test : tp < 50 ms.
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Figure 1: Pulse waveform (10/1000s)
Figure 2: Peak power dissipation versus initial junction temperature
1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 Ppp[Tj initial]/Ppp[Tj initial=25C]
Tj initial(C) 0 25 50 75 100 125 150 175
Figure 3: Peak pulse power versus exponential pulse duration (Tj initial=25C)
Ppp(W) 5000
Figure 4: Clamping voltage versus peak pulse current (Tj initial=25C) Exponential waveform tp=20ms & tp=1ms
200.0 100.0 Ipp(A)
SMAJ5.0A,CA SMAJ13A,CA
tp = 20 s tp = 1 ms
SMAJ26A,CA
1000
10.0
tp=1ms
SMAJ58A,CA
SMAJ188A,CA
1.0
tp(ms) 100 0.01 0.10 1.00 10.00
VCL(V) 0.1 1 10 100 500
Figure 5: Capacitance versus reverse applied voltage (typical values) (SMAJxxA)
5000 C(pF)
F=1MHz
SMAJ5.0A
Figure 6: Capacitance versus reverse applied voltage (typical values) (SMAJxxCA)
2000 1000
C(pF)
SMAJ5.0CA
F=1MHz
1000
SMAJ13A SMAJ26A SMAJ58A
SMAJ13CA
100
SMAJ26CA SMAJ58CA SMAJ188CA
100
SMAJ188A
10
VR(V) 10 1 10 100 200
1 1
VR(V)
10 100 200
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Figure 7: Peak forward voltage drop versus peak forward current (typical values)
10.00 IFM(A)
Figure 8: Relative variation of thermal impedance junction to ambient versus pulse duration
1.00 Zth(j-a)/Rth(j-a)
1.00
Tj=125C
0.10
0.10
Tj=25C
VFM(V) 0.01 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4
0.01 1E-2
tp(s) 1E-1 1E+0 1E+1 1E+2 5E+2
Figure 9: Thermal resistance junction to ambient versus copper surface under each lead (printed circuit board FR4 e(Cu)=35m)
140 130 120 110 100 90 80 70 60 50 40 Rth(j-a) (C/W)
Figure 10: Relative variation of leakage current versus junction temperature
IR[Tj] / IR [Tj=25C] 2E+3 1E+3
VBR 8.5V
1E+2 1E+1 1E+0
S(Cu)(cm²) 0 1 2 3 4 5
VBR < 8.5V
Tj(C) 1E-1 0 25 50 75 100 125 150
Figure 11: Ordering Information Scheme
SM
Surface Mount Peak Pulse Power A = 400 W Stand off voltage 85 = 85 V Type A = Unidirectinal CA = Bidirectional Packaging TR = Tape & reel
A
J
85
CA
-
TR
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Figure 12: SMA Package Mechanical Data
E1
REF. Min.
D
DIMENSIONS Millimeters Max. 2.03 0.20 1.65 0.41 5.60 4.60 2.95 1.60 Inches Min. 0.075 0.002 0.049 0.006 0.189 0.156 0.089 0.030 Max. 0.080 0.008 0.065 0.016 0.220 0.181 0.116 0.063
A1 A2 b
1.90 0.05 1.25 0.15 4.80 3.95 2.25 0.75
E
c E
A1
E1 D
b
C L
A2
L
Figure 13: Foot print dimensions (millimeters)
1.73 1.48 1.73
Figure 14: Marking
Cathode bar ( unidirectional de vices onl y )
e3
1.67 4.94
xxx z y ww
E : ECOPACK ( Leadfree ) mention XXX : Marking Z : Man ufacturing location Y : Year WW : week
In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a Lead-free second level interconnect . The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. Table 5: Ordering Information Part Number SMAJxxxA-TR SMAJxxxCA-TR Marking See page 2 See page 2 Package SMA SMA Weight 0.068 g 0.068 g Base qty 5000 5000 Delivery mode Tape & reel Tape & reel
Table 6: Revision History Date September-1998 02-Aug-2004 10-Dec-2004 10-Feb-2006 Revision 5B 6 7 8 Description of Changes Previous update. SMA package dimensions update. Reference A1 max. changed from 2.70mm (0.106inc.) to 2.03mm (0.080). Template layout update. No content change. Added unidirectional marking on cover page and Figure 14. Changed Figure 13. Foot print.
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