1
MOTOROLA
1SMA5.0AT3 through 1SMA78AT3
Specification Features:
•Reverse Stand–Off Voltage Range: 5.0–78 V
•Peak Power — 400 Watts @ 1.0 ms
•ESD Rating of Class 3 (>16 kV) per Human Body Model
•Pico Seconds Response Time (0 V to BV)
•Flat Handling Surface for Accurate Placement
•Package Design for Top Side or Bottom Circuit Board Mounting
•Available in Tape and Reel
•Low Profile Package
Mechanical Characteristics:
•Case: Void–free, transfer-molded plastic
•Maximum Case Temperature for Soldering Purposes: 260°C for
10 seconds
•Finish: All external surfaces are corrosion resistant with readily solderable
leads
•Polarity: Cathode indicated by molded polarity notch
•Mounted Position: Any
MAXIMUM RATINGS AND CHARACTERISTICS
Rating Symbol Value Unit
Peak Power Dissipation @ TL = 25°C, PW = 10/1000 µs (Note 1) Ppk 400 Watts
Peak Forward Surge @ TA = 25°C (JEDEC Method, Note 2) IFSM 40 Amps
Thermal Resistance from Junction to Lead RθJL 29 °C/W
Thermal Resistance from Junction to Ambient RθJA 150 °C/W
Instantaneous Forward Voltage @ 40 A VF3.5 Volts
Operating and Storage Junction Temperature Range TJ, Tstg 150 °C
*FR4 Board, using Motorola minimum recommended footprint, as shown in case 403B outline dimensions spec.
1. Non–repetitive current pulse.
2. Measured on 0.3 ms single half sine–wave or equivalent square wave, duty cycle = 4 pulse per minute maximum.
ELECTRICAL CHARACTERISTICS (VF = 3.5 Volts @ IF = 40 A for all types)
Di
Reverse Breakdown Voltage Maximum
Reverse Voltage
Maximum
Reverse
Maximum
D
Device
Reverse
Stand–off
Voltage VRWM
(Volts)
VBR
Volts
(Min)
IT
mA
R
everse
V
o
lt
age
@ IRSM
(Clamping Voltage)
VRSM (Volts)
R
everse
Surge Current
IRSM
(Amps)
Maximum
Reverse Leakage
@ VRWM
IR (µA)
Devce
Marking
1SMA5.0AT3 5.0 6.4 10 9.2 43.5 400 QE
1SMA6.0AT3 6.0 6.67 10 10.3 38.8 400 QG
1SMA6.5AT3 6.5 7.22 10 11.2 35.7 250 QK
1SMA7.0AT3 7.0 7.78 10 12.0 33.3 250 QM
1SMA7.5AT3 7.5 8.33 1 12.9 31.0 50 QP
1SMA8.0AT3 8.0 8.89 1 13.6 29.4 25 QR
1SMA8.5AT3 8.5 9.44 1 14.4 27.8 5.0 QT
1SMA9.0AT3 9.0 10 1 15.4 26.0 2.5 QV
*TOLERANCE AND VOLTAGE DESIGNATION Tolerance designation – The type number listed indicates a tolerance of ±5%. (continued)
SEMICONDUCTOR TECHNICAL DATA Order this document
by 1SMA5.0AT3/D
Motorola, Inc. 1996
PLASTIC SURFACE MOUNT
ZENER OVERVOLTAGE
TRANSIENT SUPPRESSORS
5.0–78 VOLTS VR
400 WATTS PEAK POWER
SMA
CASE 403B–01
PLASTIC
REV 1
MOTOROLA
21SMA5.0AT3 through 1SMA78AT3
ELECTRICAL CHARACTERISTICS — continued (VF = 3.5 Volts @ IF = 40 A for all types)
Di
Reverse Breakdown Voltage Maximum
Reverse Voltage
Maximum
Reverse
Maximum
D
Device
Reverse
Stand–off
Voltage VRWM
(Volts)
VBR
Volts
(Min)
IT
mA
R
everse
V
o
lt
age
@ IRSM
(Clamping Voltage)
VRSM (Volts)
R
everse
Surge Current
IRSM
(Amps)
Maximum
Reverse Leakage
@ VRWM
IR (µA)
Devce
Marking
1SMA10AT3 10 11.1 1 17.0 23.5 2.5 QX
1SMA11AT3 11 12.2 1 18.2 22.0 2.5 QZ
1SMA12AT3 12 13.3 1 19.9 20.1 2.5 RE
1SMA13AT3 13 14.4 1 21.5 18.6 2.5 RG
1SMA14AT3 14 15.6 1 23.2 17.2 2.5 RK
1SMA15AT3 15 16.7 1 24.4 16.4 2.5 RM
1SMA16AT3 16 17.8 1 26.0 15.4 2.5 RP
1SMA17AT3 17 18.9 1 27.6 14.5 2.5 RR
1SMA18AT3 18 20 1 29.2 13.7 2.5 RT
1SMA20AT3 20 22.2 1 32.4 12.3 2.5 RV
1SMA22AT3 22 24.4 1 35.5 11.3 2.5 RX
1SMA24AT3 24 26.7 1 38.9 10.3 2.5 RZ
1SMA26AT3 26 28.9 1 42.1 9.5 2.5 SE
1SMA28AT3 28 31.1 1 45.4 8.8 2.5 SG
1SMA30AT3 30 33.3 1 48.4 8.3 2.5 SK
1SMA33AT3 33 36.7 1 53.3 7.5 2.5 SM
1SMA36AT3 36 40 1 58.1 6.9 2.5 SP
1SMA40AT3 40 44.4 1 64.5 6.2 2.5 SR
1SMA43AT3 43 47.8 1 69.4 5.8 2.5 ST
1SMA45AT3 45 50 1 72.2 5.5 2.5 SV
1SMA48AT3 48 53.3 1 77.4 5.2 2.5 SX
1SMA51AT3 51 56.7 1 82.4 4.9 2.5 SZ
1SMA54AT3 54 60 1 87.1 4.6 2.5 TE
1SMA58AT3 58 64.4 1 93.6 4.8 2.5 TG
1SMA60AT3 60 66.7 1 96.8 4.1 2.5 TK
1SMA64AT3 64 71.1 1 103.0 3.9 2.5 TM
1SMA70AT3 70 77.8 1 113.0 3.5 2.5 TP
1SMA75AT3 75 83.3 1 121.0 3.3 2.5 TR
1SMA78AT3 78 86.7 1 126.0 3.2 2.5 TS
*TOLERANCE AND VOLTAGE DESIGNATION Tolerance designation – The type number listed indicates a tolerance of ±5%.
3
MOTOROLA
1SMA5.0AT3 through 1SMA78AT3
RATING AND TYPICAL CHARACTERISTIC CURVES
TA = 25
°
C
PW (ID) IS DEFINED AS THE
POINT WHERE THE PEAK CURRENT
DECAYS TO 50% OF Ipp.
= 10
µ
s
PEAK VALUE
Ippm
HALF VALUE – Ipp/2
10/1000
µ
s WAVEFORM
AS DEFINED BY R.E.A.
td
120
100
80
60
40
0012 3 4
I
ppm, PEAK PULSE CURRENT (%)
20
5
Figure 1. Pulse Rating Curve
10–4
100
0.1 1 10
10
1
0.1
tP, PULSE WIDTH (ms)
Ppk
NONREPETITIVE
PULSE W AVEFORM
SHOWN IN FIGURE 2.
TA = 25
°
C
, PEAK POWER (kW)
0.010.001
Figure 2. Pulse Waveform
t, TIME (ms)
Figure 3. Pulse Derating Curve
120
100
80
60
40
00 40 80 120 160
TA, AMBIENT TEMPERATURE (
°
C)
PEAK PULSE DERATING IN % OF
20
200
PEAK POWER OR CURRENT
10 x 1000 W AVEFORM
AS DEFINED BY R.E.A.
10,000
1,000
100
10 1 2 5 10 20 50 100 200
Figure 4. Typical Junction Capacitance
V(BR), BREAKDOWN VOLTAGE (VOLTS)
MEASURED AT
ZERO BIAS
MEASURED AT
STAND–OFF
VOLTAGE, VWM
TJ = 25
°
C
f = 1 MHz
Vsig = 50 mVp–p
0
6
Figure 5. Steady State Power Derating
T, TEMPERATURE (
°
C)
50 100 150
PD, MAXIMUM POWER DISSIPATION (WATTS)
5
4
3
2
0
TL
TA
1
MOTOROLA
41SMA5.0AT3 through 1SMA78AT3
OUTLINE DIMENSIONS
CASE 403B–01
ISSUE O
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
S
A
DB
KJ
C
H
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A0.160 0.180 4.06 4.57
B0.090 0.115 2.29 2.92
C0.075 0.105 1.91 2.67
D0.050 0.064 1.27 1.63
H0.004 0.008 0.10 0.20
J0.006 0.016 0.15 0.41
K0.030 0.060 0.76 1.52
S0.190 0.220 4.83 5.59
SMA
mm
inches
0.157
4.0
0.0787
2.0
0.0787
2.0
Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and
specifically disclaims any and all liability, including without limitation consequential or incidental damages. “Typical” parameters which may be provided in Motorola
data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals”
must be validated for each customer application by customer’s technical experts. Motorola does not convey any license under its patent rights nor the rights of
others. Motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Motorola product could create a situation where personal injury
or death may occur. Should Buyer purchase or use Motorola products for any such unintended or unauthorized application, Buyer shall indemnify and hold Motorola
and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees
arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that
Motorola was negligent regarding the design or manufacture of the part. Motorola and are registered trademarks of Motorola, Inc. Motorola, Inc. is an Equal
Opportunity/Af firmative Action Employer.
How to reach us:
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1SMA5.0AT3/D
*1SMA5.0AT3/D*
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