TVS diode array protects space systems and aircraft

Protecting digital and logic functionality and circuitry in engine control units, environmental controls, instruments and actuators in aviation and space systems, is the target role for the MDA3KP transient voltage suppressor (TVS) vertical arrays released by Microchip. They can also be used in data centres, the 5G infrastructure and communication systems also rely on complex circuitry requiring protection. These systems are all required to operate continuously despite voltage surges and spikes from lightning, solar events and electromagnetic incidents. The 3kW MDA3KP TVS diode array family is believed to be the only available technology offering a comprehensive voltage range tested to a high reliability standard and qualified based on the MIL-PRF-19500 JANTX level equivalence standard. It provides an integrated multi-diode, said Microchip. The voltage clamping devices provide fast-reacting avalanche breakdown diode (ABD) features that divert excess current around sensitive components to protect them from electrical overstress.

The diode family also addresses the challenges system designers face with a more efficient vertical construction and requirement for less board space than other devices, said the company.

MDA3KP TVS diode arrays are available in M, MA, MXL and MX screened version industry standards. The devices have been exposed to various levels of testing to ensure they meet the aircraft lightning protection requirements set forth in the standard for environmental testing of avionics, RTCA DO-160E (Lightening Induced Transient Susceptibility).

The MDA3KP TVS diode array is a vertically constructed eight-diode, 16-pin surface mount package. It allows for efficient layout and ease of design, as less PCB space is required while enabling higher power densities, noted Microchip. Each MDA3KP TVS diode array’s vertical construction provides the power of eight smaller devices on a PCB, eliminating the need for the multiple devices even as it provides higher power.

The TVS diode arrays are available in uni-directional and bi-directional construction in standoff voltages of 6.0 to 40V. The components provide electrostatic discharge (ESD) and electrical fast transients (EFT) protection according IEC standards and a peak pulse power rating of 3,000W at 10/1000 micro seconds. They have an extended temperature range from -55 to +150°C. The devices are lot traceable, surge tested, and moisture sensitivity level (MSL) Level 1, for use in harsh environments. MSL indicates that no dry pack or bake is required prior to use. The MDA3KP TVS diode array family’s power rating is the industry’s only available technology with this level of screening in this package.

Microchip’s 3kW MDA diode family provides military system circuit protection for ruggedized handheld radios, the global positioning system (GPS) and communication test equipment, as well as automotive, industrial logging equipment, power supplies and marine systems.

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