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Home Products Circuit Protection Transient Voltage Suppressors (TVS) - TVS Diodes MAP5KE22CA
MAP5KE22CA
Part Number MAP5KE22CA
Manufacturer Microsemi Corporation
Description TVS DIODE 22VWM 35.5VC DO204AL
Quantity Available 2557 pcs new original in stock.
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Datasheets 1.MAP5KE22CA.pdf2.MAP5KE22CA.pdf
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Technical Information of MAP5KE22CA
Manufacturer Part Number MAP5KE22CA Category Circuit Protection
Manufacturer Microsemi Description TVS DIODE 22VWM 35.5VC DO204AL
Package / Case DO-204AL (DO-41) Quantity Available 2557 pcs
Voltage - Reverse Standoff (Typ) 22V Voltage - Clamping (Max) @ Ipp 35.5V
Voltage - Breakdown (Min) 24.4V Type Zener
Supplier Device Package DO-204AL (DO-41) Series Military, MIL-PRF-19500
Power Line Protection No Power - Peak Pulse 500W
Package / Case DO-204AL, DO-41, Axial Package Bulk
Operating Temperature -65°C ~ 150°C (TJ) Mounting Type Through Hole
Current - Peak Pulse (10/1000µs) 14.1A Capacitance @ Frequency -
Bidirectional Channels 1 Base Product Number MAP5KE22
Applications General Purpose  
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Frequently Asked Questions

  • How does the 22V reverse standoff voltage of MAP5KE22CA affect its behavior in normal operating conditions? The 22V reverse standoff voltage of MAP5KE22CA keeps the device off under normal circuit voltages, avoiding leakage while allowing it to snap into conduction during overvoltage events. This standoff voltage provides MAP5KE22CA with a 2.4V margin above the 24.4V breakdown, ensuring stable operation in low-voltage digital circuits without premature activation.
  • What engineering implications arise from the 24.4V minimum breakdown voltage of MAP5KE22CA in transient protection circuits? The 24.4V minimum breakdown voltage of MAP5KE22CA introduces a narrow activation window that helps prevent nuisance triggering from electrostatic discharge or power supply ripple, while still providing robust clamping for actual transients. In practice, this allows MAP5KE22CA to maintain low leakage currents below 1µA at 20V reverse bias, enhancing signal integrity in sensitive communication interfaces.
  • Why is the 35.5V clamping voltage at 14.1A peak pulse current important for MAP5KE22CA in circuit design? The 35.5V clamping voltage at 14.1A for MAP5KE22CA ensures that voltage spikes are limited to a level that protects downstream ICs with logic levels around 3.3V or 5V. This clamping behavior of MAP5KE22CA minimizes the risk of latch-up or gate oxide damage in microcontrollers or sensors connected to the protected line.
  • How does the 500W peak pulse power rating of MAP5KE22CA relate to its 14.1A current handling capability? The 500W peak pulse power rating of MAP5KE22CA, derived from its 14.1A capability, indicates the device's ability to absorb energy from moderate transients without thermal runaway. This power level of MAP5KE22CA makes it appropriate for general purpose use where transient energies are in the range of hundreds of joules, but insufficient for high-energy events exceeding 1kW.
  • In what types of circuits does the bidirectional operation of MAP5KE22CA provide advantages over unidirectional options? The bidirectional operation of MAP5KE22CA allows symmetric protection in circuits like telephone lines or audio interfaces where surges can propagate in both directions. This feature distinguishes MAP5KE22CA from unidirectional TVS devices, which would require a pair for full bidirectional coverage, potentially increasing cost and board space.
  • What operating temperature range is MAP5KE22CA qualified for, and why is it relevant for certain applications? MAP5KE22CA operates effectively across -65°C to 150°C, supporting use in both military vehicles and outdoor equipment. The wide temperature range combined with its military qualification allows MAP5KE22CA to perform consistently in embedded systems subjected to thermal cycling and vibration.
  • How does the MIL-PRF-19500 qualification influence the reliability considerations when selecting MAP5KE22CA? The MIL-PRF-19500 qualification of MAP5KE22CA involves detailed testing for moisture resistance, thermal shock, and mechanical integrity, which is critical for MAP5KE22CA in environments with high humidity or mechanical shock. This qualification process gives MAP5KE22CA an edge in long-term reliability for aerospace and defense designs where failure rates must be minimized.
  • What design constraints should be considered when implementing MAP5KE22CA in a through-hole DO-204AL package? Implementing MAP5KE22CA in the through-hole DO-204AL package requires careful consideration of lead spacing and solder joint strength to handle the thermal expansion during soldering. The axial package of MAP5KE22CA can be prone to lead fatigue if not properly supported, especially in high-reliability assemblies where vibration is a concern.
  • How does MAP5KE22CA's bidirectional nature compare to unidirectional TVS devices for surge protection in mixed-polarity environments? Compared to unidirectional TVS devices, MAP5KE22CA offers better protection in applications with unknown surge polarity, such as in power distribution systems or data buses with bidirectional transients. This makes MAP5KE22CA a more flexible choice when the protection scheme cannot assume a specific direction for overvoltage events.
  • When might a TVS diode with a lower standoff voltage than MAP5KE22CA be more suitable for a given application? A TVS diode with a lower standoff voltage than MAP5KE22CA would be more suitable in environments where the normal operating voltage is closer to 18V or below, as the higher standoff of MAP5KE22CA could result in higher leakage currents and delayed response times. Matching the standoff voltage closely to the circuit's maximum operating voltage optimizes the trade-off between protection speed and quiescent power consumption.
  • What factors should be evaluated when considering MAP5KE22CA as an alternative in an existing transient suppression design? When considering MAP5KE22CA as an alternative, the key factors include verifying that the 35.5V clamp voltage fits within the protected circuit's tolerance and that the 14.1A current matches the expected surge magnitude. Differences in package and construction between MAP5KE22CA and other suppressors may also require adjustments in PCB layout to maintain the intended surge protection effectiveness.
  • How well does the general purpose profile of MAP5KE22CA align with the requirements of embedded systems in industrial environments? The general purpose profile of MAP5KE22CA, with its 500W handling and broad temperature range, aligns well with embedded systems in industrial controls where occasional transients occur but high-speed data transmission is not the primary focus. However, for systems with very high transient energies or rapid switching, MAP5KE22CA might need supplementation with additional protection layers to ensure full surge handling.
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