UMA5.0A thru UMA170CA
U
LTRA
M
ITETM SURFACE MOUNT 500 Watt
Transient Voltage Suppressor 5.0 to 170 V
S C O T T S D A L E D I V I S I O N
W
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UMA5.0A UMA170CA
DESCRIPTION
PACKAGE
These 500 watt transient voltage suppressors offer capabilities only found in larger
packages. They are used for protecting against a variety of transients from inductive
switching environments or lower levels of induced secondary lightning effects of
IEC61000-4-5.
It offers the same size footprint as the popular DO-214AC or
BA package outlines except with a much lower profile height. Its robust
configuration in a "2010" style MELF package prevents damage to extended-
lead terminals and virtually eliminates inductive parasitics from fast rise-time
transients with very short internal/external conduction paths. They a
re also very
effective in protection from ESD or EFT per IEC61000-4-2 and IEC61000-4-4.
UltraMiteTM
IMPORTANT: For the most current data, consult MICROSEMI's website:
http://www.microsemi.com
FEATURES
APPLICATIONS / BENEFITS
Available as a unidirectional or bidirectional device
(bidirectional with CA suffix)
Fast response time
Suppresses transients up to 500 W @ 10/1000 s
(see Figure 1, 2, and 3).
Robust 2010 MELF style flat package configuration
for accurate pick-and-place handling
Fits same small narrow PCB pad layouts as "SMAJ"
packages in JEDEC DO-214AC (or BA)
Very low height profile (approximately 1 mm)
Available on Tape and Reel
Built-in stress relief with similar COE as PC boards
Optional Lead-Free design/finish (UMAF5.0A-170CA)
Options for screening in accordance with MIL-PRF-
19500 for JAN, JANTX, JANTXV, and JANS are
available by adding MQ, MX, MV, or MSP prefixes
respectively to part numbers.
Protects sensitive components such as IC's, CMOS,
Bipolar, BiCMOS, ECL, DTL, T
2
L, 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: UMA5.0 to UMA100A or CA
Class 2: UMA5.0 to UMA51A or CA
Class 3: UMA5.0 to UMA24A or CA
Class 4: UMA5.0 to UMA12A or CA
Secondary lightning protection per IEC61000-4-5
with 12 Ohms source impedance:
Class 1: UMA5.0 to UMA30A or CA
Class 2: UMA5.0 to UMA16A or CA
Virtually zero inductive parasitics with minimal Ldi/dt
voltage overshoots for fast-rise-time transients
MAXIMUM RATINGS
MECHANICAL AND PACKAGING
Peak Pulse Power dissipation at 25
C: 500 watts at
10/1000 s (also see Fig 1, 2, and 3)
Impulse repetition rate (duty factor): 0.01%
t
clamping
(0 volts to
V
(BR)
min.): < 100 ps theoretical for
unidirectional and < 5 ns for bidirectional
Operating and Storage temperature: -55
C to +150
C
Thermal resistance: 50
C/W junction to lead, or
115
C/W junction to ambient when mounted on FR4
PC board (1oz Cu) with recommended 5 mm
2
pads
(see last page)
Steady-State Power: 2.5 watts at T
L
= 25
o
C, or 1.08
watts at T
A
= 25
C when mounted on FR4 PC board
with recommended 5 mm
2
footprint pads
Forward Surge Current at 25C: 40 amps peak, 8.3
ms half-sine wave. Maximum voltage of 3.50 V
(unidirectional only)
Solder temperatures: 260
C for 10 s (maximum)
FRP substrate material and epoxy under-fill package
meeting UL94V-0
Terminals solder plated (solderable per MIL-STD-
750, Method 2026)
Body marked with part number without UMA prefix
(ie. 05, 15A, 33A, 58, 150CA, etc.)
Cathode designated with band (no band on
bidirectional)
Weight: 0.020 grams (approximate)
Tape & Reel packaging per EIA-481-2 with 12 mm
tape and 3000 units/reel (7 inch) or 10,000 units/reel
(13 inch)
See package dimensions on last page
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
Copyright
2002
MSCUMA5.0.PDF 10-16-2003 REV B
UMA5.0A thru UMA170CA
U
LTRA
M
ITETM SURFACE MOUNT 500 Watt
Transient Voltage Suppressor 5.0 to 170 V
S C O T T S D A L E D I V I S I O N
W
W
W
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Mi
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UMA5.0A UMA170CA
ELECTRICAL CHARACTERISTICS @25
o
C
MICROSEMI
PART NUMBER*
RATED
WORKING
PEAK
STANDOFF
VOLTAGE
V
WM
(V)
BREAKDOWN
VOLTAGE
V
(BR)
MIN
@ I
(BR)
(V)
BREAKDOWN
CURRENT
I
(BR)
(mA)
MAXIMUM
CLAMPING
VOLTAGE
V
C
@ I
PP
(V)
PEAK
PULSE
CURRENT
I
PP
(A)
MAXIMUM
STANDBY
CURRENT
I
D
@ V
WM
(
A)
UMA5.0A
UMA6.0A
UMA6.5A
UMA7.0A
5.0
6.0
6.5
7.0
6.40
6.67
7.22
7.78
10
10
10
10
9.2
10.3
11.2
12.0
54.3
48.5
44.7
41.7
800
800
500
200
UMA7.5A
UMA8.0A
UMA8.5A
UMA9.0A
7.5
8.0
8.5
9.0
8.33
8.89
9.44
10.0
1
1
1
1
12.9
13.6
14.4
15.4
38.8
36.7
34.7
32.6
100
50
10
5
UMA10A
UMA11A
UMA12A
UMA13A
10
11
12
13
11.1
12.2
13.3
14.4
1
1
1
1
17.0
18.2
19.9
21.5
29.4
27.4
25.1
23.2
5
5
5
5
UMA14A
UMA15A
UMA16A
UMA17A
14
15
16
17
15.6
16.7
17.8
18.9
1
1
1
1
23.2
24.4
26.0
27.6
21.5
20.6
19.2
18.1
5
5
5
5
UMA18A
UMA20A
UMA22A
UMA24A
18
20
22
24
20.0
22.2
24.4
26.7
1
1
1
1
29.2
32.4
35.5
38.9
17.2
15.4
14.1
12.8
5
5
5
5
UMA26A
UMA28A
UMA30A
UMA33A
26
28
30
33
28.9
31.1
33.3
36.7
1
1
1
1
42.1
45.4
48.4
53.3
11.9
11.0
10.3
9.4
5
5
5
5
UMA36A
UMA40A
UMA43A
UMA45A
36
40
43
45
40.0
44.4
47.8
50.0
1
1
1
1
58.1
64.5
69.4
72.7
8.6
7.8
7.2
6.9
5
5
5
5
UMA48A
UMA51A
UMA54A
UMA58A
48
51
54
58
53.3
56.7
60.0
64.4
1
1
1
1
77.4
82.4
87.1
93.6
6.5
6.1
5.7
5.3
5
5
5
5
UMA60A
UMA64A
UMA70A
UMA75A
60
64
70
75
66.7
71.1
77.8
83.3
1
1
1
1
96.8
103.0
113
121
5.2
4.9
4.4
4.1
5
5
5
5
UMA78A
UMA85A
UMA90A
UMA100A
78
85
90
100
86.7
94.4
100
111
1
1
1
1
126
137
146
162
4.0
3.6
3.4
3.1
5
5
5
5
UMA110A
UMA120A
UMA130A
UMA150A
110
120
130
150
122
133
144
167
1
1
1
1
177
193
209
243
2.8
2.6
2.4
2.1
5
5
5
5
UMA160A
UMA170A
160
170
178
189
1
1
259
275
1.9
1.8
5
5
* Order with "CA" suffix for bi-directional types. Capacitance will be that shown in figure 4.
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2
Copyright
2002
MSCUMA5.0.PDF 10-16-2003 REV B
UMA5.0A thru UMA170CA
U
LTRA
M
ITETM SURFACE MOUNT 500 Watt
Transient Voltage Suppressor 5.0 to 170 V
S C O T T S D A L E D I V I S I O N
W
W
W
.
Mi
c
r
o
s
e
m
i
.
C
O
M
UMA5.0A UMA170CA
SYMBOLS & DEFINITIONS
Symbol Definition Symbol Definition
V
WM
Working Peak (Standoff) Voltage
I
PP
Peak Pulse Current
P
PP
Peak Pulse Power
V
C
Clamping Voltage
V
(BR)
Breakdown Voltage
I
(BR)
Breakdown Current for V
(BR)
I
D
Standby Current
GRAPHS
tw Microseconds
Figure 1 Peak Pulse Power (P
PP
) Kilowatts versus
Pulse
Width
(t
W
) - Microseconds
C Ca
pa
cita
nce - Pi
cofarads
FIGURE 2
Lead Temperature
o
C
V
(BR)
- Breakdown Voltage Volts
Peak Pulse Power (Ppp
) or
Curr
e
n
t
(I
PP
) in p
e
rcenta
ge of 25
o
C Ratin
g
Test wave form
parameterxs
tr = 10
sec.
tp = 1000
sec.
Pulse Waveform for Exponential Surge
FIGURE 3
FIGURE 4
Derating Curve
Typical Capacitance vs. Breakdown Voltage
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 3
Copyright
2002
MSCUMA5.0.PDF 10-16-2003 REV B
PDF 
ZIP