SMAJ530 & SMAJ550
Vishay General Semiconductor
Surface Mount T
RANS
Z
ORB
®
Transient Voltage Suppressors
FEATURES
• Glass passivated chip junction
• Available in Unidirectional polarity only
• Excellent clamping capability
• Very fast response time
• Low incremental surge resistance
• Meets MSL level 1, per J-STD-020C, LF max peak
of 260 °C
• Solder Dip 260 °C, 40 seconds
• Component in accordance to RoHS 2002/95/EC
and WEEE 2002/96/EC
MAJOR RATINGS AND CHARACTERISTICS
V
WM
P
PPM
P
D
I
FSM
T
j
max.
530 V, 550 V
300 W
2.5 W
40 A
150 °C
DO-214AC (SMA)
APPLICATION NOTES
• Respect Thermal Resistance (PCB Layout) - as the
temperature coefficient also contributes to the
clamping voltage
• Select minimum breakdown voltage, so you get
acceptable power dissipation and PCB tie point
temperature
• Devices with higher breakdown voltage will have a
shorter conduction time and will dissipate less
power
• Clamping voltage is influenced by internal resistance
- design approximation is 7 V per 100 mA slope
• Keep temperature of TVS lower than TOPSwitch
®
as a recommendation
• Maximum current is determined by the maximum T
j
and can be higher than 300 mA
• Contact supplier for different clamping voltage/
current arrangements
• Minimum breakdown voltage can be customized for
other applications. Contact supplier
• TOPSwitch
®
is a registered trademark of Power
Integrations, Inc.
TYPICAL APPLICATIONS
Use in sensitive electronics protection against voltage
transients induced by inductive load switching and
lighting on ICs, MOSFET, signal lines of sensor units
for consumer, computer, industrial, automotive and
telecommunication.
MECHANICAL DATA
Case:
DO-214AC (SMA)
Epoxy meets UL 94V-0 flammability rating
Terminals:
Matte tin plated leads, solderable per
J-STD-002B and JESD22-B102D
E3 suffix for commercial grade, HE3 suffix for high
reliability grade (AEC Q101 qualified)
Polarity:
Color band denotes cathode end
MAXIMUM RATINGS
(T
A
= 25 °C unless otherwise noted)
PARAMETER
Device marking code
Power dissipation on infinite heatsink
(3)
Peak pulse power dissipation
(1,2,4)
(see Fig. 1)
Stand-off voltage
Operating junction and storage temperature range
Note:
(1) Non repetitive current pulse per Fig. 3 and derated above 25 °C per Fig. 2
(2) Mounted on 5.0 mm
2
copper pads to each terminal
(3) Lead temperature at T
L
= 75 °C
(4) Peak pulse power waveform is 10/1000 µs
Document Number 88391
14-Sep-06
www.vishay.com
1
P
D
P
PPM
V
WM
T
J
, T
STG
477
SYMBOL
SMAJ530
HD
2.5
Minimum 300
495
SMAJ550
SB
W
W
V
°C
UNIT
- 55 to + 150
SMAJ530 & SMAJ550
Vishay General Semiconductor
ELECTRICAL CHARACTERISTICS
(T
A
= 25 °C unless otherwise noted)
PARAMETER
Minimum breakdown voltage
Max. clamping voltage
TEST CONDITIONS
at 100 µA
at 400 mA, 10/1000 µs-waveform
SYMBOL
V
(BR)
V
C
I
D
C
J
C
J
SMAJ530
530
760
5.0
650
90
7.5
SMAJ550
550
UNIT
V
V
µA
mV/°C
pF
pF
Maximum DC reverse leakage current at V
WM
Typical temperature coefficient
Typical capacitance
(1)
Note:
(1) Measured at 1 MHz
of V
(BR)
at 0 V
at 200 V
THERMAL CHARACTERISTICS
(T
A
= 25 °C unless otherwise noted)
PARAMETER
Typical thermal resistance junction-to-lead
Typical thermal resistance junction-to-ambient
(1)
Note:
(1) Mounted on minimum recommended pad layout
SYMBOL
R
θJL
R
θJA
SMAJ530
30
120
SMAJ550
UNIT
°C/W
°C/W
ORDERING INFORMATION
PREFERRED P/N
SMAJ530-E3/61
SMAJ530-E3/5A
UNIT WEIGHT (g)
0.064
0.064
PREFERRED PACKAGE CODE
61
5A
BASE QUANTITY
1800
7500
DELIVERY MODE
7" Diameter Plastic Tape & Reel
13" Diameter Plastic Tape & Reel
RATINGS AND CHARACTERISTICS CURVES
(T
A
= 25
°C
unless otherwise noted)
Non-repetitive
Pulse
Waveform
shown in Fig. 3
T
A
= 25 °C
10
Peak Pulse Power (P
PP
) or Current (I
PP
)
Derating in Percentage, %
100
100
P
PPM
- Peak Pulse Power (kW)
75
50
1
25
0.1
0.1
µs
0
1.0
µs
10
µs
100
µs
1.0 ms
10 ms
0
25
50
75
100
125
150
175
200
td - Pulse
Width
(s)
T
J
- Initial Temperature (°C)
Figure 1. Peak Pulse Power Rating Curve
Figure 2. Pulse Power or Current versus Initial Junction Temperature
www.vishay.com
2
Document Number 88391
14-Sep-06
Legal Disclaimer Notice
Vishay
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
Document Number: 91000
Revision: 08-Apr-05
www.vishay.com
1
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