Datasheet

SMAJ530, SMAJ550
www.vishay.com
Vishay General Semiconductor
Revision: 24-Jan-2019
1
Document Number: 88391
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THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Surface Mount TRANSZORB
®
Transient Voltage Suppressors
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.
FEATURES
• Glass passivated chip junction
• Available in uni-directional polarity only
• Excellent clamping capability
• Very fast response time
• Low incremental surge resistance
• Meets MSL level 1, per J-STD-020, LF maximum peak
of 260 °C
• AEC-Q101 qualified available
- Automotive ordering code: base P/NHM3
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
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: SMA (DO-214AC)
Molding compound meets UL 94 V-0 flammability rating
Base P/N-M3 - halogen-free, RoHS-compliant, and
industrial grade
Base P/NHM3_X - halogen-free, RoHS-compliant, and
AEC-Q101 qualified
(“_X” denotes revision code e.g. A, B, ...)
Terminals: matte tin plated leads, solderable per
J-STD-002 and JESD 22-B102
M3 and HM3 suffix meet JESD 201 class 2 whisker test
Polarity: color band denotes cathode end
PRIMARY CHARACTERISTICS
V
BR
(uni-directional) 530 V to 550 V
V
WM
477 V, 495 V
P
PPM
300 W
P
D
2.5 W
I
FSM
(uni-directional only) 40 A
T
J
max. 150 °C
Polarity Uni-directional
Package SMA (DO-214AC)
SMA (DO-214AC)