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參數資料
| 型號： | MXUMA14A |
| 廠商： | MICROSEMI CORP-SCOTTSDALE |
| 元件分類： | TVS二極管 - 瞬態電壓抑制 |
| 英文描述： | 500 W, UNIDIRECTIONAL, SILICON, TVS DIODE |
| 封裝： | PLASTIC, ULTRAMITE, 2 PIN |
| 文件頁數： | 1/4頁 |
| 文件大小： | 434K |
| 代理商： | MXUMA14A |
UMA5.0A thru UMA170CA
ULTRAMITE SURFACE MOUNT 500 Watt
Transient Voltage Suppressor 5.0 to 170 V
SCOTTSD A L E DIVISION
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UMA5.0A
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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 are also very
effective in protection from ESD or EFT per IEC61000-4-2 and IEC61000-4-4.
UltraMite
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
2L, 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 25C: 500 watts at
10/1000 s (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: -55C to +150C
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 TL = 25oC, or 1.08
watts at TA = 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
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