TVS Diodes
Surface Mount > 400W > 1SMA5.0AT3G Series
1SMA5.0AT3G Series
Pb
OBSOLETE/EOL
DATE June/30/2018 PCN/ECN# LFPCN41246
REPLACED BY SMAJ Series
Description
The 1SMA5.0AT3G series is designed to protect voltage
sensitive components from high voltage, high energy
transients. They have excellent clamping capability, high
surge capability, low zener impedance and fast response
time. The 1SMA5.0AT3G series is supplied in the Littelfuse
exclusive, cost-effective, highly reliable package and is
ideally suited for use in communication systems,
automotive, numerical controls, process controls, medical
equipment, business machines, power supplies and many
other industrial/consumer applications.
Features
• Working Peak Reverse Voltage Range − 5.0 V to 78 V
Maximum Ratings and Thermal Characteristics
Parameter
• Standard Zener Breakdown Voltage Range −
Symbol
Value
Unit
PPK
400
W
6.7 V to 91.25 V
• Peak Power − 400 W @ 1 ms
Peak Power Dissipation (Note 1) @ TL =
25°C, Pulse Width = 1 ms
• ESD Rating of Class 3 (> 16 kV) per Human Body Model
• Response Time is Typically < 1 ns
DC Power Dissipation @ TL = 75°C
Measured Zero Lead Length (Note 2)
PD
Derate Above 75°C
Thermal Resistance from Junction
to−Lead
RJL
1.0
W
20
mW/°C
50
°C/W
• Flat Handling Surface for Accurate Placement
• Package Design for Top Slide or Bottom Circuit
Board Mounting
• Low Profile Package
Bi-directional
• These are Pb−Free Device
DC Power Dissipation (Note 3)
@ TA = 25°C
PD
Derate Above 25°C
Thermal Resistance from Junction–to–
Ambient
R0JA
0.5
W
4.0
mW/°C
250
°C/W
Functional Diagram
Cathode
Forward Surge Current (Note 4) @ TA
= 25°C
IFSM
40
A
Operating and Storage Temperature
Range
TJ, Tstg
-65 to
+150
°C
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If
any of these limits are exceeded, device functionality should not be assumed, damage may
occur and reliability may be affected.
Anode
Additional Information
Uni-directional
Datasheet
Resources
Samples
1. 10 X 1000 µs, non−repetitive.
2. 1” square copper pad, FR−4 board.
3. FR−4 board, using Littelfuse minimum recommended footprint, as shown in 403D-02
case outline dimensions spec.
4. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per
minute maximum.
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
TVS Diodes
Surface Mount > 400W > 1SMA5.0AT3G Series
I-V Curve Characteristics (T
A
= 25°C unless otherwise noted, VF = 3.5 V Max. @ IF = 30 A for all types) (Note 5)
Symbol
I
IF
V C V BR V RWM
IR V F
IT
IPP
V
Parameter
IPP
Maximum Reverse Peak Pulse Current
VC
Clamping Voltage @ IPP
VRWM
Working Peak Reverse Voltage
IR
Maximum Reverse Leakage Current @ VRWM
VBR
Breakdown Voltage @ IT
IT
Test Current
IF
Maximum Temperature Coefficient of VBR
VF
Forward Voltage @ IF
5. 1/2 sine wave or equivalent, PW = 8.3 ms, non−repetitive duty cycle.
5. 1/2 sine wave or equivalent, PW = 8.3 ms non−repetitive duty cycle
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
TVS Diodes
Surface Mount > 400W > 1SMA5.0AT3G Series
Electrical Characteristics
VC @ IPP
Breakdown Voltage
Device*
Device
Marking
1SMA5.0AT3G
QE
V
RWM
(Note 6)
IR @
VRWM
Volts
µA
5.0
400
(Note 8)
C Typ.
VBR @ IT (V) (Note 7)
@ IT
VC
IPP
(Note 9)
MIN
NOM
MAX
mA
Volts
Amps
pF
6.4
6.7
7.0
10
9.2
43.5
2035
1SMA6.0AT3G
QG
6.0
400
6.67
7.02
7.37
10
10.3
38.8
1730
1SMA6.5AT3G
QK
6.5
250
7.22
7.6
7.98
10
11.2
35.7
1605
1SMA8.0AT3G
QR
8.0
25
8.89
9.36
9.83
1
13.6
29.4
1035
1SMA8.5AT3G
QT
8.5
5.0
9.44
9.92
10.4
1
14.4
27.8
1265
1SMA9.0AT3G
QV
9.0
2.5
10
10.55
11.1
1
15.4
26.0
1200
1SMA10AT3G
QX
10
2.5
11.1
11.7
12.3
1
17.0
23.5
1090
1SMA11AT3G
QZ
11
2.5
12.2
12.85
13.5
1
18.2
22.0
1000
1SMA12AT3G
RE
12
2.5
13.3
14.0
14.7
1
19.9
20.1
925
1SMA13AT3G
RG
13
2.5
14.4
15.15
15.9
1
21.5
18.6
860
1SMA14AT3G
RH
14
2.5
15.6
16.4
17.2
1
23.2
17.2
800
1SMA15AT3G
RM
15
2.5
16.7
17.6
18.5
1
24.4
16.4
758
1SMA16AT3G
RP
16
2.5
17.8
18.75
19.7
1
26.0
15.4
715
1SMA17AT3G
RR
17
2.5
18.9
19.9
20.9
1
27.6
14.5
680
1SMA18AT3G
RT
18
2.5
20
21.05
22.1
1
29.2
13.7
645
1SMA20AT3G
RV
20
2.5
22.2
23.35
24.5
1
32.4
12.3
585
1SMA22AT3G
RX
22
2.5
24.4
25.65
26.9
1
35.5
11.3
540
1SMA24AT3G
RZ
24
2.5
26.7
28.1
29.5
1
38.9
10.3
500
1SMA26AT3G
SE
26
2.5
28.9
30.4
31.9
1
42.1
9.5
460
1SMA28AT3G
SG
28
2.5
31.1
32.75
34.4
1
45.4
8.8
430
1SMA30AT3G
SK
30
2.5
33.3
35.05
36.8
1
48.4
8.3
405
1SMA33AT3G
SM
33
2.5
36.7
38.65
40.6
1
53.3
7.5
375
1SMA36AT3G
SP
36
2.5
40
42.1
44.2
1
58.1
6.9
345
1SMA40AT3G
SR
40
2.5
44.4
46.75
49.1
1
64.5
6.2
315
1SMA43AT3G
ST
43
2.5
47.8
50.3
52.8
1
69.4
5.8
295
1SMA45AT3G
SV
45
2.5
50
52.65
55.3
1
72.2
5.5
280
1SMA48AT3G
SX
48
2.5
53.3
56.1
58.9
1
77.4
5.2
265
1SMA54AT3G
TE
54
2.5
60
63.15
66.3
1
87.1
4.6
240
1SMA58AT3G
TG
58
2.5
64.4
67.8
71.5
1
93.6
4.3
225
1SMA70AT3G
TP
70
2.5
77.8
81.9
86.0
1
113
3.5
190
6. A transient suppressor is normally selected according to the working peak reverse voltage (VRWM), which should be equal to or greater than the DC or continuous peak operating voltage level.
7. VBR measured at pulse test current IT at an ambient temperature of 25°C.
8. Surge current waveform per Figure 2 and derate per Figure 3.
9. Bias voltage = 0 V, F = 1.0 MHz, TJ = 25°C.
†Please see 1SMA10CAT3 to 1SMA75CAT3 for Bidirectional devices.
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
TVS Diodes
Surface Mount > 400W > 1SMA5.0AT3G Series
Ratings and Characteristic Curves
Figure 1. Pulse Rating Curve
Figure 2. Pulse Waveform
Ppk, PEAK POWER (kW)
100
NONREPETITIVE
PULSE WAVEFORM
SHOWN IN FIGURE 2.
TA = 25°C
10
1
0.1
10 4
0.001
0.11
0.01
tP, PULSE WIDTH (ms)
10
Figure 3 - Pulse Derating Curve
Figure 4. Typical Junction Capacitance vs. Bias Voltage
C, CAPACITANCE (pF)
10,000
TJ = 25°C
F = 1 MHz
1SMA5.0AT3G
1,000
1SMA10AT3G
1SMA36AT3G
100
1SMA64AT3G
10
1
1
10
BIAS VOLTAGE (VOLTS)
PD, MAXIMUM POWER DISSIPATION (WATTS)
Figure 5. Steady State Power Derating
6
5
4
@ TL = 75°C
PD = 1.5 W
3
2
@ TA = 25°C
PD = 0.5 W
1
0
0
25
50
100
75
T, TEMPERATURE (°C)
125
150
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17
100
TVS Diodes
Surface Mount > 400W > 1SMA5.0AT3G Series
Dimensions
Soldering Footrpint
HE
4.000
0.157
E
bD D
2.000
0.079
POLARITY INDICATOR
OPTIONAL AS NEEDED
(SEE STYLES)
A
c
L
2.000
0.079
A1
SCALE 8:1
Dim
Inches
mm
inches
Millimeters
Min
Nom
Max
Min
Nom
Max
A
0.078
0.083
0.087
1.97
2.10
2.20
A1
0.002
0.004
0.008
0.05
0.10
0.20
b
0.050
0.057
0.064
1.27
1.45
1.63
c
0.006
0.011
0.016
0.15
0.28
0.41
D
0.090
0.103
0.115
2.29
2.60
2.92
E
0.160
0.170
0.180
4.06
4.32
4.57
HE
0.190
0.205
0.220
4.83
5.21
5.59
L
0.030
0.045
0.060
0.76
1.14
1.52
NOTES:
ORDERING INFORMATION
Device
Package
Shipping†
SMA
(Pb−Free)
1SMAxxAT3G
5,000 /
Tape & Reel
Flow/Wave Soldering (Solder Dipping)
Peak Temperature :
260OC
Dipping Time :
10 seconds
1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION b SHALL BE MEASURED WITHIN DIMENSION L.
Physical Specifications
STYLE 1:
PIN 1. CATHODE (POLARITY BAND)
2. ANODE
Case
Void-free, transfer-molded, thermosetting
plastic
Polarity
Cathode indicated by molded polarity
notch
Mounting Position
Any
Finish
All external surfaces are corrosion
resistant and leads are readily solderable
Part Marking System
xx
WW
AY
xx
A=
Y=
WW
= Device Code (Refer to page 3)
Assembly Location
Year
= Work Week
Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and
test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete
Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics.
© 2017 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 09/14/17