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Microchip Technology MAPLAD18KP64CA
- Part No.:
- MAPLAD18KP64CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP64CA.pdf
- Description:
- TVS DIODE 64VWM 103VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,691
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Product details
Overview
MAPLAD18KP64CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial systems. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 64 V reverse standoff voltage (VWM), clamps to ≤103 V at 175 A peak impulse current (IPP), and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 2–4 lightning standards.
For engineers reviewing the MAPLAD18KP64CA datasheet, MAPLAD18KP64CA pinout, MAPLAD18KP64CA application, or MAPLAD18KP64CA equivalent, this device is selected for secondary lightning protection, load dump suppression, and ESD/EFT hardening where low thermal resistance, RoHS-compliant packaging, and MIL-PRF-19500 upscreening capability are critical design requirements.
Technical Context
The MAPLAD18KP64CA employs an avalanche diode structure optimized for fast response (<5 ns clamping time) and high cumulative stroke endurance under multi-pulse conditions. Its metal-base package enables direct thermal coupling to heatsinks, achieving 0.7 °C/W junction-to-case thermal resistance - essential for sustained surge duty cycles per RTCA DO-160 Section 22.
It operates bidirectionally with symmetrical breakdown (71.1–78.6 V @ I(BR)), supports 10 μA max standby current at VWM, and maintains stable clamping performance across -55°C to +150°C junction temperature range. Compliance with AEC-Q101 and IEC 61000-4-2/4-4/4-5 confirms suitability for harsh-environment automotive and avionics signal/power line protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains aircraft lightning-induced transients without degradation |
| Reverse Standoff Voltage (VWM) | 64 V - matches nominal 48–60 V DC bus systems in avionics and commercial vehicles |
| Clamping Voltage (VC) | ≤103 V @ IPP = 175 A - limits downstream IC stress below 120 V absolute maximum ratings |
| Breakdown Voltage (V(BR)) | 71.1–78.6 V @ I(BR) - ensures reliable conduction onset above operating voltage with margin |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to PCB copper or external heatsink for repeated surges |
| Clamping Response Time | <5 ns - protects sensitive analog and digital interfaces against sub-microsecond transients |
| Steady-State Power Dissipation | 71 W @ TC = 100°C - supports continuous thermal management in convection-cooled enclosures |
Pinout & Package
MAPLAD18KP64CA uses a surface-mount PLAD package with metal base acting as cathode terminal for both polarities (bidirectional symmetry). The case is void-free thermosetting epoxy (UL94V-0), with matte-tin plating on terminals for solderability per MIL-STD-750 Method 2026. Weight: ~1 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode / Common Terminal | Serves as thermal path and electrical return; must be soldered to large copper pour or heatsink |
| Top Surface Pad | Anode / Common Terminal | Provides symmetrical bidirectional conduction path; connects to protected line |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Surge Suppression | Enables single-device protection of AC-coupled or floating differential lines without polarity concerns |
| RTCA DO-160F Waveform 4 Level 4 Compliance | Validated for 6.4/69 μs pin-injection transients at 25°C - required for commercial aircraft avionics |
| IEC 61000-4-5 Secondary Lightning Protection | Class 2–4 certified with 42 Ω, 12 Ω, and 2 Ω source impedances - covers telecom, vehicle, and industrial grid interfaces |
| MIL-PRF-19500 Upscreening Option | Supports high-reliability screening (M, MA, MX, MXL levels) for mission-critical aerospace deployments |
| Low Profile SMT Construction | 0.470″ × 0.230″ × 0.100″ footprint - fits dense PCB layouts while maintaining 18 kW surge capacity |
Applications
| Aerospace Avionics Power Bus Protection | Commercial Vehicle Load Dump Suppression |
|---|---|
Use Scenario: Protecting 28 V DC distribution networks in flight control computers and sensor modules from lightning-induced surges per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary secondary-level TVS placed at board-level input filter stage to clamp transients before DC/DC converters and FPGAs. Use Value: 18,000 W PPP and <5 ns response prevent latch-up or gate oxide damage in downstream ASICs during multi-stroke events. | Use Scenario: Safeguarding infotainment head units and ADAS ECUs against 12 V battery load dump spikes exceeding 120 V. IC Role / Device Role / Timing Role: Bidirectional TVS mounted directly at connector entry point to absorb energy before EMI filters and LDO regulators. Use Value: 64 V VWM aligns with ISO 16750-2 load dump profile; 103 V VC ensures MCU I/O stays within safe operating area. |
| Industrial Ethernet Port Protection | Renewable Energy Inverter DC Link Protection |
Use Scenario: Hardening PoE-powered switches and industrial controllers against EFT bursts and induced RFI on RJ45 data lines. IC Role / Device Role / Timing Role: TVS array replacement using discrete bidirectional devices on each differential pair (e.g., TX+/TX−). Use Value: Meets IEC 61000-4-4 Level 4 (4 kV) and provides symmetric clamping to preserve signal integrity on high-speed links. | Use Scenario: Shielding IGBT gate drivers and current sensors in solar inverters from switching transients and grid fault surges. IC Role / Device Role / Timing Role: DC link TVS placed between DC+ and DC− rails to limit overvoltage during rapid IGBT turn-off. Use Value: 0.7 °C/W RθJC allows mounting on shared heatsink with power semiconductors, reducing thermal system complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA | 600 W PPP rating, SMB package, 100 V VC @ 5.3 A IPP - 30× lower energy handling | Only suitable for low-energy ESD/EFT; cannot meet DO-160 or load dump requirements | Select only for cost-sensitive consumer electronics with sub-1 kV transients |
| SMCJ64CA | 1500 W PPP rating, SMC package, 103 V VC @ 13.9 A IPP - 12× lower peak power than MAPLAD18KP64CA | Limited to automotive module-level protection; fails RTCA DO-160F Waveform 4 Level 4 testing | Use where space constraints prohibit PLAD footprint but higher reliability than SMBJ is needed |
Compared with SMBJ64CA and SMCJ64CA, the MAPLAD18KP64CA delivers 30× and 12× greater peak pulse power respectively, enabling compliance with aviation lightning standards and heavy-duty automotive load dump - making it irreplaceable in safety-critical power rail protection where energy absorption is non-negotiable.
Availability
MAPLAD18KP64CA is available at Aetrix Electronics and suitable for aerospace avionics, commercial vehicle electronics, and industrial power conversion systems requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MAPLAD18KP64CA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi Corporation (now part of Microchip Technology) designs high-reliability semiconductor solutions for aerospace, defense, and industrial markets, with emphasis on radiation-hardened ICs, timing devices, and robust protection components.
The MAPLAD18KP64CA belongs to Microsemi's high-power PLAD TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump suppression in mission-critical platforms where failure is not an option.
FAQ
What is the clamping voltage of MAPLAD18KP64CA at its rated peak pulse current?
The MAPLAD18KP64CA has a maximum clamping voltage (VC) of 103 V when subjected to its rated peak impulse current (IPP) of 175 A under 10/1000 μs waveform conditions. This value is guaranteed per the manufacturer's electrical characteristics table and ensures downstream circuitry remains within safe voltage limits during surge events. The MAPLAD18KP64CA achieves this performance while maintaining bidirectional symmetry and low thermal resistance.
Does MAPLAD18KP64CA meet RTCA DO-160F lightning protection requirements?
Yes, the MAPLAD18KP64CA is certified for RTCA DO-160F Section 22 lightning-induced transient testing, specifically Waveform 4 (6.4/69 μs) at Level 4. Its 18,000 W peak pulse power rating, fast <5 ns response, and metal-base thermal design enable reliable multi-stroke performance. The MAPLAD18KP64CA is explicitly listed in the datasheet for this qualification, distinguishing it from lower-power alternatives that cannot sustain repeated strikes.
What is the thermal resistance and how should MAPLAD18KP64CA be mounted for optimal heat dissipation?
The MAPLAD18KP64CA has a junction-to-case thermal resistance (RθJC) of 0.7 °C/W, achieved via direct metal-base contact. For optimal heat dissipation, the metal base must be soldered to a minimum 1.0″ × 1.0″ copper pad (2 oz Cu) or attached to an external heatsink using thermally conductive interface material. The MAPLAD18KP64CA's low RθJC enables sustained operation under repetitive surge conditions where ambient temperature exceeds 85°C.
Is MAPLAD18KP64CA RoHS compliant and what is its moisture sensitivity level?
Yes, the MAPLAD18KP64CA is RoHS compliant (e3 marking), with annealed matte-tin plating meeting MIL-STD-750 solderability requirements. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1 - meaning no dry pack or baking is required prior to reflow soldering. The MAPLAD18KP64CA's void-free epoxy body and controlled plating ensure long-term reliability in humid environments without popcorn cracking risk.
Can MAPLAD18KP64CA be used for both unidirectional and bidirectional protection?
No - only bidirectional protection. The "CA" suffix in MAPLAD18KP64CA explicitly denotes bidirectional construction, with symmetrical breakdown (71.1–78.6 V) and clamping behavior across both polarities. Unidirectional variants (e.g., MAPLAD18KP64A) exist but are distinct part numbers. The MAPLAD18KP64CA is intended for AC-coupled, floating, or differential signal lines where polarity reversal may occur during transients.
MAPLAD18KP64CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 175A
- Power - Peak Pulse:
- 18000W (18kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PLAD
MAPLAD18KP64CA FAQ
1.How can I place an order for MAPLAD18KP64CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP64CA on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAPLAD18KP64CA reliable?
The price and inventory of MAPLAD18KP64CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP64CA is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP64CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP64CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP64CA?
MAPLAD18KP64CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP64CA order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAPLAD18KP64CA?
For technical support, including MAPLAD18KP64CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP64CA requirements.
6.How does Aetrix verify that MAPLAD18KP64CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP64CA products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAPLAD18KP64CA meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP64CA?
All MAPLAD18KP64CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP64CA, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAPLAD18KP64CA part is unused and in its original packaging.
Return procedure for MAPLAD18KP64CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP64CA Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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