1Publication Order Number:
SA5.0A/D
SA5.0A Series
500 Watt Peak Power
Littelfuse Zener
Transient Voltage
Suppressors
Unidirectional
The SA5.0A 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 SA5.0A series is supplied in
the Littelfuse exclusive, cost-effective, highly reliable
axial leaded package and is ideally-suited for use in
communication systems, numerical controls, process controls,
medical equipment, business machines, power supplies and many
other industrial/consumer applications.
Features
•Working Peak Reverse Voltage Range − 5.0 to 170 V
•Peak Power − 500 Watts @ 1.0 ms
•ESD Rating of Class 3 (>16 kV) per Human Body Model
•Maximum Clamp Voltage @ Peak Pulse Current
•Low Leakage < 1 mA above 8.5 V
•UL 497B for Isolated Loop Circuit Protection
•Maximum Temperature Coefficient Specified
•Response Time is typically < 1.0 ns
•Pb−Free Packages are Available
Mechanical Characteristics:
CASE: Void-free, Transfer-molded, Thermosetting Plastic
FINISH: All external surfaces are corrosion resistant and leads are
readily solderable
MAXIMUM LEAD TEMPERATURE FOR SOLDERING:
260°C, 1/16 in. from the case for 10 seconds
POLARITY: Cathode indicated by polarity band
MOUNTING POSITION: Any
MARKING DIAGRAM
AXIAL LEAD
CASE 59AA
PLASTIC
Cathode Anode
A
SAxxxA
YYWWG
G
Device Package Shipping
ORDERING INFORMATION
SAxxxAG Axial Lead
(Pb−Free)
1000 Units / Box
SAxxxARLG Axial Lead
(Pb−Free)
5000 / Tape & Reel
SAxxxALFG** Axial Lead
(Pb−Free)
2000 Units / Box
**Lead formed device.
A = Assembly Location
SAxxxA = Device Number
(Refer to Table on Page 3)
YY = Year
WW = Work Week
G=Pb−Free Package
(Note: Microdot may be in either location)
Littelfuse.com
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 13
OBSOLETE/EOL
DATE June/30/2018 PCN/ECN# LFPCN41246
REPLACED BY SA Series
SA5.0A Series
MAXIMUM RATINGS
Rating Symbol Value Unit
Peak Power Dissipation (Note 1) @ TL ≤ 25°C PPK 500 W
Steady State Power Dissipation @ TL ≤ 25°C, Lead Length = 3/8 in
Derated above TL = 50°C
PD3.0
30
W
mW/°C
Thermal Resistance, Junction−to−Lead RqJL 33.3 °C/W
Forward Surge Current (Note 2) @ TA = 25°C IFSM 70 A
Operating and Storage Temperature Range TJ, Tstg −55 to +150 °C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
1. Nonrepetitive current pulse per Figure 4 and derated above TA = 25°C per Figure 5.
2. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per minute.
ELECTRICAL CHARACTERISTICS (TA = 25°C unless
otherwise noted, VF = 3.5 V Max. @ IF (Note 6) = 35 A)
Symbol Parameter
IPP Maximum Reverse Peak Pulse Current
VCClamping Voltage @ IPP
VRWM Working Peak Reverse Voltage
IRMaximum Reverse Leakage Current @ VRWM
VBR Breakdown Voltage @ IT
ITTest Current
QVBR Maximum Temperature Variation of VBR
IFForward Current
VFForward Voltage @ IF
Uni−Directional TVS
IPP
IF
V
I
IR
IT
VRWM
VCVBR
VF
2Publication Order Number:
SA5.0A/D
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 13
SA5.0A Series
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted, VF = 3.5 V Max. @ IF (Note 6) = 35 A)
Device*
Device
Marking
VRWM
(Note 3) IR @ VRWM
Breakdown Voltage VC @ IPP (Note 5)
QVBR
VBR (Note 4) (Volts) @ ITVCIPP
Volts mAMin Nom Max mA Volts A mV/°C
SA5.0A, G SA5.0A 5 600 6.4 6.7 7 10 9.2 54.3 5
SA6.0AG SA6.0A 6 600 6.67 7.02 7.37 10 10.3 48.5 5
SA7.0ARLG SA7.0A 7 150 7.78 8.19 8.6 10 12 41.7 6
SA10AG SA10A 10 1 11.1 11.7 12.3 1 17 29.4 10
SA12AG SA12A 12 1 13.3 14 14.7 1 19.9 25.1 12
SA13AG SA13A 13 1 14.4 15.15 15.9 1 21.5 23.2 13
SA15AG SA15A 15 1 16.7 17.6 18.5 1 24.4 20.6 16
SA16AG SA16A 16 1 17.8 18.75 19.7 1 26 19.2 17
SA17ARLG SA17A 17 1 18.9 19.9 20.9 1 27.6 18.1 19
SA18ARLG SA18A 18 1 20 21.05 22.1 1 29.2 17.2 20
SA20ARLG SA20A 20 1 22.2 23.35 24.5 1 32.4 15.4 23
SA24AG SA24A 24 1 26.7 28.1 29.5 1 38.9 12.8 28
SA26ARLG SA26A 26 1 28.9 30.4 31.9 1 42.1 11.9 30
SA28ARLG SA28A 28 1 31.1 32.75 34.4 1 45.4 11 31
SA30ARLG SA30A 30 1 33.3 35.05 36.8 1 48.4 10.3 36
SA33ARLG SA33A 33 1 36.7 38.65 40.6 1 53.3 9.4 39
SA36AG SA36A 36 1 40 42.1 44.2 1 58.1 8.6 41
SA51AG SA51A 51 1 56.7 59.7 62.7 1 82.4 6.1 61
SA64ALFG SA64A 64 1 71.1 74.85 78.6 1 103 4.9 76
SA100AG SA100A 100 1 111 117 123 1 162 3.1 123
SA170ARLG SA170A 170 1 189 199 209 1 275 1.8 208
3. The transients suppressor is normally selected according to the maximum working peak reverse voltage (VRWM), which should be
equal to or greater than the dc or continuous peak operating voltage level.
4. VBR measured at pulse test current IT at an ambient temperature of 25°C.
5. Surge current waveform per Figure 4 and derate per Figures 1 and 2.
6. 1/2 sine wave (or equivalent square wave), PW = 8.3 ms, duty cycle = 4 pulses per minute
*The “G’’ suffix indicates Pb−Free package or Pb−Free Packages available.
100
10
1
0.1
0.1 ms1ms10ms 100 ms1ms 10 ms
P
P, PEAK POWER (kW)
tp, PULSE WIDTH
Figure 1. Pulse Rating Curve
NONREPETITIVE PULSE
WAVEFORM SHOWN IN
FIGURE 4
100
80
60
40
20
0
0 25 50 75 100 125 150 175 200
PEAK PULSE DERATING IN % OF
PEAK POWER OR CURRENT @ TA= 25 C
TA, AMBIENT TEMPERATURE (°C)
Figure 2. Pulse Derating Curve
K
°
3Publication Order Number:
SA5.0A/D
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 13
SA5.0A Series
10,000
1000
100
10
0.1 1 10 100 1000
C, CAPACITANCE (pF)
VBR, BREAKDOWN VOLTAGE (VOLTS)
MEASURED @
ZERO BIAS
Figure 3. Capacitance versus Breakdown Voltage
100
50
001 234
t, TIME (ms)
VALUE (%)
PULSE WIDTH (tp) IS
DEFINED AS THAT POINT
WHERE THE PEAK
CURRENT DECAYS TO
50% OF IPP
.
PEAK VALUE − IPP
HALF VALUE −IPP
2
Figure 4. Pulse Waveform
5
4
3
2
1
0
0 25 50 75 100 125 150 175 200
P
D, STEADY STATE POWER DISSIPATION (WATTS)
TL, LEAD TEMPERATURE (°C)
3/8″
3/8″
Figure 5. Steady State Power Derating
tr ≤ 10 ms
MEASURED @
(VRWM)tP
UL RECOGNITION*
The entire series including the bidirectional CA suffix has
Underwriters Laboratory Recognition for the classification
of protectors (QVGQ2) under the UL standard for safety
497B and File . Many competitors only have one
or two devices recognized or have recognition in a
non-protective category. Some competitors have no
recognition at all. With the UL497B recognition, our parts
successfully passed several tests including Strike Voltage
Breakdown test, Endurance Conditioning, Temperature test,
Dielectric Voltage-Withstand test, Discharge test and
several more.
Whereas, some competitors have only passed a
flammability test for the package material, we have been
recognized for much more to be included in their protector
category.
*Applies to SA5.0A − SA170A.
4Publication Order Number:
SA5.0A/D
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 13
#E128662
SA5.0A Series
PACKAGE DIMENSIONS
AXIAL LEAD
CASE 59AA−01
ISSUE A
K
A
D
K
B
DIM MIN MAX MIN MAX
MILLIMETERSINCHES
A5.80 7.600.228 0.299
B2.60 3.600.102 0.142
D0.71 0.860.028 0.034
K25.44 −−−1.000 −−−
NOTES:
1. DIMENSIONING AND TOLERANCING PER
ANSI Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. ALL RULES AND NOTES ASSOCIATED WITH
JEDEC DO−41 OUTLINE SHALL APPLY.
4. POLARITY DENOTED BY CATHODE BAND.
5. LEAD DIAMETER NOT CONTROLLED WITHIN
F DIMENSION.
6. REPLACES CASE 59−09.
POLARITY INDICATOR
OPTIONAL AS NEEDED
(SEE STYLES)
Littelfuse.com
5Publication Order Number:
SA5.0A/D
Specifications subject to change without notice. © 2016 Littelfuse, Inc.
September 19, 2016 − Rev. 13
Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military,
aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or
any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property
damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be
deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be
liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in
applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale,
unless otherwise agreed by Littelfuse.
