SAC5.0 thru SAC50
500 WATT LOW CAPACITANCE
TRANSIENT VOLTAGE SUPPRESSOR
SCOTTSDALE DIVISION
DESCRIPTION
This SAC5.0 thru SAC50 transient voltage suppressor (TVS) series rated at
500 watts provides an added rectifier element as shown in Figure 4 to
achieve low capacitance in applications for higher speed data or signal
lines. The low capacitance rating of 30 pF may be used for protecting
higher frequency applications in inductive switching environments or
electrical systems involving secondary lightning effects per IEC61000-4-5
as well as RTCA/DO-160D or ARINC 429 for airborne avionics.
If
bidirectional protection is needed, two SAC devices in anti-parallel
configuration are required as shown in Figure 6. With their very fast
response time, they also provide ESD and EFT protection per IEC61000-4-
2 and IEC61000-4-4 respectively.
IMPORTANT:
For the most current data, consult
MICROSEMI’s
website:
http://www.microsemi.com
APPEARANCE
DO-41
WWW .
Microsemi
.C
OM
FEATURES
•
Unidirectional low-capacitance TVS series for
flexible thru-hole mounting (for bidirectional see
Figure 4)
Suppresses transient up to 500 Watts Peak Pulse
Power @ 10/1000 µs
Improved performance in low capacitance of 30 pF
Economical plastic series in flexible axial-leaded
DO-41 package
Options for screening in accordance with MIL-PRF-
19500 for JAN, JANTX, JANTXV, and JANS are
also available by adding MQ, MX, MV, or MSP
prefixes respectively to part number, e.g.
MXSAC5.0, MVSAC18, etc.
Also available in surface mount with SMAJ or
SMBJ prefix for part numbers (ex. SMAJSAC5.0)
UL94V-0 Flammability Classification
•
•
•
APPLICATIONS / BENEFITS
Low Capacitance for data-line protection to 70 MHz
ESD and EFT protection per IEC61000-4-2 and
IEC61000-4-4 respectively
Secondary lightning protection per IEC61000-4-5 with
42 Ohms source impedance:
Class 1: SAC5.0 to SAC50
Class 2: SAC5.0 to SAC45
Class 3: SAC5.0 to SAC22
Class 4: SAC5.0 to SAC10
Secondary lightning protection per IEC61000-4-5 with
12 Ohms source impedance
Class 1: SAC5.0 to SAC26
Class 2: SAC5.0 to SAC15
Class 3: SAC5.0 to SAC7.0
•
•
•
•
•
•
•
MAXIMUM RATINGS
•
•
•
Peak Pulse Power Dissipation at 25 C: 500 Watts @
10/1000
µs
with repetition rate of 0.01% or less*
o
Steady State Power Dissipation* at T
L
= +75 C: 2.5 Watts
(Lead Length = 3/8”).
Clamping Speed (0 volts to V
(BR)
Min.) less than 5
nanoseconds.
Operating and Storage Temperature: -65 C to +150 C.
o
o
o
MECHANICAL AND PACKAGING
•
•
•
•
•
•
CASE: Void Free Transfer Molded Thermosetting Plastic
(DO-41) meeting UL94V-0
TERMINATIONS: Tin-lead plated and solderable per MIL-
STD-750 method 2026
POLARITY: Cathode indicated by band
MARKING: Part number and cathode band
WEIGHT: 0.7 Grams (Approx.)
See package dimensions on last page
SAC5.0 thru SAC50
•
*
TVS devices are not typically used for dc power dissipation and are instead operated < V
WM
(rated standoff voltage) except for transients that briefly
drive the device into avalanche breakdown (V
BR
to V
C
region) of the TVS element. Also see Figures 5 and 6 for further protection details in rated peak
pulse power for unidirectional and bidirectional configurations respectively.
Copyright
2004
4-26-2004 REV B
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
SAC5.0 thru SAC50
500 WATT LOW CAPACITANCE
TRANSIENT VOLTAGE SUPPRESSOR
SCOTTSDALE DIVISION
ELECTRICAL CHARACTERISTICS @ 25
o
C
MICROSEMI
PART
NUMBER
REVERSE
STAND-OFF
VOLTAGE
(Note 1)
V
WM
Volts
SAC5.0
SAC6.0
SAC7.0
SAC8.0
SAC8.5
SAC10
SAC12
SAC15
SAC18
SAC22
SAC26
SAC36
SAC45
SAC50
5.0
6.0
7.0
8.0
8.5
10
12
15
18
22
26
36
45
50
BREAKDOWN
VOLTAGE
V
(BR)
@ I
(BR)
1.0mA
V
(BR)
Volts
Min.
7.60
7.90
8.33
8.89
9.44
11.10
13.30
16.70
20.00
24.40
28.90
40.0
50.00
55.50
MAXIMUM MAXIMUM
STANDBY CLAMPING
CURRENT VOLTAGE
V
C
I
D
@V
WM
@ I
P
= 5.0A
µA
300
300
300
100
50
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
Volts
10.0
11.2
12.6
13.4
14.0
16.3
19.0
23.6
28.8
35.4
42.3
60.0
77.0
88.0
MAXIMUM
PEAK PULSE
CURRENT
RATING
I
PP
Amps
44
41
38
36
34
29
25
20
15
14
11.1
8.6
6.8
5.8
MAXIMUM
CAPACITANCE
WORKING
INVERSE
BLOCKING
VOLTAGE
V
WIB
Volts
75
75
75
75
75
75
75
75
75
75
75
75
150
150
INVERSE
BLOCKING
LEAKAGE
CURRENT
@ V
WIB
I
IB
µA
10
10
10
10
10
10
10
10
10
10
10
10
10
10
PEAK
INVERSE
BLOCKING
VOLTAGE
V
PIB
Volts
100
100
100
100
100
100
100
100
100
100
100
100
200
200
WWW .
Microsemi
.C
OM
@ O Volts
pF
30
30
30
30
30
30
30
30
30
30
30
30
30
30
* TVS devices are not typically used for dc power dissipation and are instead operated < V
WM
(rated standoff voltage) except for transients that
briefly drive the device into avalanche breakdown (V
BR
to V
C
region) of the TVS element.
Note 1:
A transient voltage suppressor is normally selected according to voltage (V
WM
), which should be equal to or greater than the dc or continuous peak
operating voltage level.
Note 2:
When pulse testing, test in TVS avalanche direction. Do not pulse in “forward” direction. See section for “Schematic Applications” herein.
GRAPHS
SAC5.0 thru SAC50
t
w
– Pulse Width
µs
FIGURE 1
Copyright
2004
4-26-2004 REV B
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2
SAC5.0 thru SAC50
500 WATT LOW CAPACITANCE
TRANSIENT VOLTAGE SUPPRESSOR
SCOTTSDALE DIVISION
WWW .
Microsemi
.C
OM
Average
Power
Lead Length = 3/8”
T
L
– Lead Temperature – C
o
I
PP
– Peak Pulse Current - % I
PP
Peak Power
(Single Pulse)
% of Rated Power
t – Time – msec
FIGURE 2
FIGURE 3
SCHEMATIC APPLICATIONS
The TVS low capacitance device configuration is shown in Figure 4. As a further option for unidirectional applications, an additional low
capacitance rectifier diode may be used in parallel in the same polarity direction as the TVS as shown in Figure 5. In applications where random
high voltage transients occur, this will prevent reverse transients from damaging the internal low capacitance rectifier diode and also provide a
low voltage conducting direction. The added rectifier diode should be of similar low capacitance and also have a higher reverse voltage rating
than the TVS clamping voltage V
C
. The Microsemi recommended rectifier part number is the “LCR60” for the application in Figure 5. If using two
(2) low capacitance TVS devices in anti-parallel for bidirectional applications, this added protective feature for both directions (including the
reverse of each rectifier diode) is also provided. The unidirectional and bidirectional configurations in Figure 5 and 6 will both result in twice the
capacitance of Figure 4.
FIGURE 4
TVS with internal Low
Capacitance Diode
FIGURE 5
Optional Unidirectional
configuration (TVS and
separate rectifier diode)
in parallel)
FIGURE 6
Optional Bidirectional
configuration (two TVS
devices in anti-parallel)
SAC5.0 thru SAC50
Copyright
2004
4-26-2004 REV B
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 3
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