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SMAJ78 Datasheet Preview

SMAJ78 Datasheet

Transient Voltage Suppressor

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SMAJ78 pdf
SCOTTSDALE DIVISION
SMAJ5.0 thru SMAJ170CA, e3
SURFACE MOUNT 500 Watt
Transient Voltage Suppressor
DESCRIPTION
This SMAJ5.0-170A series of surface mount 500 W Transient Voltage
Suppressors (TVSs) protects a variety of voltage-sensitive components from
destruction or degradation. The package outline is similar to the DO-214AC or
DO-214BA. It is also available in a unidirectional configuration or as bidirectional
with a C or CA suffix part number as well as RoHS Compliant with an “e3”suffix.
Their response time is virtually instantaneous. As a result, they can be used for
protection from ESD or EFT per IEC61000-4-2 and IEC61000-4-4, or for
inductive switching environments and induced RF protection. They can also
protect from secondary lightning effects per IEC61000-4-5 and class levels
defined herein. Microsemi also offers numerous other TVS products to meet
higher and lower power demands and special applications.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com
PACKAGE
DO-214AC or BA
(SMAJ)
FEATURES
APPLICATIONS / BENEFITS
Selections for 5.0 to 170 volts standoff voltages (VWM)
Suppresses transients up to 500 watts @ 10/1000 µs (see
Figure 1) with fast response
Optional 100% screening for avionics grade is available
by adding MA prefix to part number for added 100%
temperature cycle -55oC to +125oC (10X) as well as surge
(3X) and 24 hours HTRB with post test VZ & IR (in the
operating direction for unidirectional or both directions for
bidirectional)
Options for screening in accordance with MIL-PRF-19500
for JANTX are available by adding MX prefix to the part
number.
Axial-lead equivalent packages for thru-hole mounting
available as P5KE6.8 to P5KE170CA (consult factory for
other surface mount options)
Moisture classification is Level 1 with no dry pack required
per IPC/JEDEC J-STD-020B
RoHS Compliant devices available by adding an “e3” suffix
Economical surface mount
Available in Unidirectional or as Bidirectional
construction with a C or CA suffix
Protects sensitive components such as IC’s,
CMOS, Bipolar, BiCMOS, ECL, DTL, T2L, etc.
Protection from switching transients & induced RF
Compliant to IEC61000-4-2 and IEC61000-4-4 for
ESD and EFT protection respectively
Secondary lightning protection per IEC61000-4-5
with 42 Ohms source impedance:
Class 1: SMAJ5.0 to SMAJ100A or CA
Class 2: SMAJ5.0 to SMAJ51A or CA
Class 3: SMAJ5.0 to SMAJ24A or CA
Class 4: SMAJ5.0 to SMAJ12A or CA
Secondary lightning protection per IEC61000-4-5
with 12 Ohms source impedance:
Class 1: SMAJ5.0 to SMAJ30A or CA
Class 2: SMAJ5.0 to SMAJ16A or CA
MAXIMUM RATINGS
Peak Pulse Power dissipation at 25ºC: 500 watts at
10/1000 μs (also see Fig 1,2, and 3)
Impulse repetition rate (duty factor): 0.01%
tclamping (0 volts to V(BR) min.): < 100 ps theoretical for
unidirectional and < 5 ns for bidirectional
Operating and Storage temperature: -65ºC to +150ºC
Thermal resistance: 15 ºC/W junction to lead or 80ºC/W
junction to ambient when mounted on FR4 PC board (1oz
Cu) with recommended footprint (see last page)
Steady-State Power dissipation: 5 watts at TL = 75oC, or
1.56 watts at TA = 25ºC when mounted on FR4 PC board
with recommended footprint
Forward Surge Current at 25ºC: 40 amps peak, 8.3 ms
half-sine wave. Maximum voltage of 3.50 V
(unidirectional only)
Solder temperatures: 260 ºC for 10 s (maximum)
MECHANICAL AND PACKAGING
CASE: Void-free transfer molded thermosetting
epoxy body meeting UL94V-0
TERMINALS: C-bend (modified J-bend) leads Tin-
Lead or RoHS compliant annealed matte-Tin plating
solderable per MIL-STD-750, method 2026
POLARITY: Cathode indicated by band. No
marking on bi-directional devices
MARKING: Part number without SMA prefix (e.g.
5.0, 5.0A, 5.0Ae3, 5.0CA, 36A, 36CA, 36CAe3, etc.)
TAPE & REEL option: Standard per EIA-481-1-A
with 12 mm tape, 750 per 7 inch reel or 2500 per 13
inch reel (add “TR” suffix to part number)
WEIGHT: 0.064 grams
See package dimension on last page
Copyright © 2009
MSC0270A, REV L, 5-24-2009
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1



Microsemi
Microsemi

SMAJ78 Datasheet Preview

SMAJ78 Datasheet

Transient Voltage Suppressor

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SMAJ78 pdf
SCOTTSDALE DIVISION
SMAJ5.0 thru SMAJ170CA, e3
SURFACE MOUNT 500 Watt
Transient Voltage Suppressor
ELECTRICAL CHARACTERISTICS @ 5oC
TYPE
NUMBER
SMAJ5.0
SMAJ5.0A
SMAJ6.0
SMAJ6.0A
SMAJ6.5
SMAJ6.5A
SMAJ7.0
SMAJ7.0A
SMAJ7.5
SMAJ7.5A
SMAJ8.0
SMAJ8.0A
SMAJ8.5
SMAJ8.5A
SMAJ9.0
SMAJ9.0A
SMAJ10
SMAJ10A
SMAJ11
SMAJ11A
SMAJ12
SMAJ12A
SMAJ13
SMAJ13A
SMAJ14
SMAJ14A
SMAJ15
SMAJ15A
SMAJ16
SMAJ16A
SMAJ17
SMAJ17A
SMAJ18
SMAJ18A
SMAJ20
SMAJ20A
SMAJ22
SMAJ22A
SMAJ24
SMAJ24A
SMAJ26
SMAJ26A
SMAJ28
SMAJ28A
SMAJ30
SMAJ30A
SMAJ33
SMAJ33A
SMAJ36
SMAJ36A
SMAJ40
SMAJ40A
REVERSE
STANDOFF
VOLTAGE
VWM
Volts
5.0
5.0
6.0
6.0
6.5
6.5
7.0
7.0
7.5
7.5
8.0
8.0
8.5
8.5
9.0
9.0
10
10
11
11
12
12
13
13
14
14
15
15
16
16
17
17
18
18
20
20
22
22
24
24
26
26
28
28
30
30
33
33
36
36
40
40
MINIMUM
BREAKDOWN
VOLTAGE
VBR
MIN @ I(BR)
Volts
6.40
6.40
6.67
6.67
7.22
7.22
7.78
7.78
8.33
8.33
8.89
8.89
9.44
9.44
10.0
10.0
11.1
11.1
12.2
12.2
13.3
13.3
14.4
14.4
15.6
15.6
16.7
16.7
17.8
17.8
18.9
18.9
20.0
20.0
22.2
22.2
24.4
24.4
26.7
26.7
28.9
28.9
31.1
31.1
33.3
33.3
36.7
36.7
40.0
40.0
44.4
44.4
BREAKDOWN
CURRENT
I(BR)
mA
10
10
10
10
10
10
10
10
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
MAXIMUM
CLAMPING
VOLTAGE
@ IPP
VC
Volts
9.6
9.2
11.4
10.3
12.3
11.2
13.3
12.0
14.3
12.9
15.0
13.6
15.9
14.4
16.9
15.4
18.8
17.0
20.1
18.2
22.0
19.9
23.8
21.5
25.8
23.2
26.9
24.4
28.8
26.0
30.5
27.6
32.2
29.2
35.8
32.4
39.4
35.5
43.0
38.9
46.6
42.1
50.0
45.4
53.5
48.4
59.0
53.3
64.3
58.1
71.4
64.5
PEAK
PULSE
CURRENT
(See Fig. 2)
IPP
Amps
52
54.3
43.9
48.5
40.7
44.7
37.8
41.7
35.0
38.8
33.3
36.7
31.4
34.7
29.5
32.6
26.6
29.4
24.9
27.4
22.7
25.1
21.0
23.2
19.4
21.5
18.8
20.6
17.6
19.2
16.4
18.1
15.5
17.2
13.9
15.4
12.7
14.1
11.6
12.8
10.7
11.9
9.9
11.0
9.3
10.3
8.5
9.4
9.8
8.6
7.0
7.8
Copyright © 2009
MSC0270A, REV L, 5-24-2009
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
MAXIMUM
STANDBY
CURRENT
@ VWM
ID
μA
800
800
800
800
500
500
200
200
100
100
50
50
10
10
5
5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Page 2


Part Number SMAJ78
Description Transient Voltage Suppressor
Maker Microsemi
Total Page 5 Pages
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