Features: • 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.
Application• 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: 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
Specifications• Peak Pulse Power dissipation at 25: 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: -55 to +150
• Thermal resistance: 50 /W junction to lead, or 115/W junction to ambient when mounted on FR4 PC board (1oz Cu) with recommended 5 mm2 pads (see last page)
• Steady-State Power: 2.5 watts at TL = 25, or 1.08 watts at TA = 25 when mounted on FR4 PC board with recommended 5 mm2 footprint pads
• Forward Surge Current at 25: 40 amps peak, 8.3 ms half-sine wave. Maximum voltage of 3.50 V (unidirectional only)
• Solder temperatures: 260 for 10 s (maximum)DescriptionThese 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 extendedlead 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.
UMA5.0A Data Sheet
