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UMA78A Datasheet(PDF) 1 Page - Microsemi Corporation |
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UMA78A Datasheet(HTML) 1 Page - Microsemi Corporation |
1 / 4 page UMA5.0A thru UMA170CA ULTRAMITE™ SURFACE MOUNT 500 Watt Transient Voltage Suppressor 5.0 to 170 V SCOTTSD A L E DIVISION 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 µs (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 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: -55ºC to +150ºC • Thermal resistance: 50 ºC/W junction to lead, or 115 ºC/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 ºC when mounted on FR4 PC board with recommended 5 mm 2 footprint pads • 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) • 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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