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Microchip Technology MAPLAD18KP90CAE3
- Part No.:
- MAPLAD18KP90CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP90CAE3.pdf
- Description:
- TVS DIODE 9VWM 15.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:8,857
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Product details
Overview
MAPLAD18KP90CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 90 V reverse standoff voltage (VWM), clamps to ≤146 V at 124 A peak impulse current (IPP), and meets RTCA DO-160F Level 4 pin injection and IEC 61000-4-5 Class 1–5 secondary lightning protection requirements.
For engineers reviewing the MAPLAD18KP90CAE3 datasheet, MAPLAD18KP90CAE3 pinout, MAPLAD18KP90CAE3 application, or MAPLAD18KP90CAE3 equivalent, this device is selected for high-reliability DC bus protection in avionics power distribution units, automotive battery management systems, and industrial UPS front-ends where multi-stroke lightning immunity and low thermal resistance are critical.
Technical Context
The MAPLAD18KP90CAE3 employs an avalanche diode structure optimized for fast response (<5 ns clamping time) and low junction-to-case thermal resistance (0.7 °C/W). Its bidirectional construction enables symmetrical clamping across both polarities without external polarity management, supporting AC-coupled signal lines and floating DC rails.
It is rated for operation from −55 °C to +150 °C, with moisture sensitivity level 1 (no dry pack required), RoHS-compliant matte-tin plating, and full surge testing per AEC-Q101. The metal-base package design places the cathode on the bottom surface, enabling direct thermal coupling to heatsinks or PCB copper planes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains multi-stroke lightning surges without degradation |
| Reverse Standoff Voltage (VWM) | 90 V - maximum continuous DC or peak AC voltage before conduction begins |
| Clamping Voltage (VC) | ≤146 V @ IPP = 124 A - limits downstream component stress during surge events |
| Breakdown Voltage (V(BR)) | 100–111 V @ I(BR) - defines onset of avalanche conduction with tight 5% tolerance |
| Thermal Resistance (RθJC) | 0.7 °C/W - enables efficient heat transfer to heatsink or large copper pour |
| Standby Current (ID) | ≤10 μA @ VWM - negligible leakage in standby, preserving system efficiency |
| Clamping Time | <5 ns - responds faster than most microcontrollers and power MOSFETs it protects |
Pinout & Package
MAPLAD18KP90CAE3 uses a surface-mount, metal-base PLAD package (0.470″ × 0.230″ × 0.100″) with cathode on the bottom metal surface and anode on the top-side metallized pad. Thermal performance relies on soldering the metal base directly to a thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Bottom Metal Base | Cathode (Bidirectional) | Primary thermal path and one conduction terminal; must be soldered to thermal plane |
| Top Metallized Pad | Anode (Bidirectional) | Second conduction terminal; connects to protected line via short trace |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Enables protection of AC-coupled data lines or floating DC buses without polarity constraints |
| RTCA DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin injection surges in aircraft avionics interfaces |
| IEC 61000-4-5 Class 1–5 secondary lightning protection | Meets stringent industrial and aerospace surge immunity standards with 42 Ω, 12 Ω, and 2 Ω source impedances |
| MIL-PRF-19500 upscreening option | Supports high-reliability screening (M, MA, MX, MXL levels) for mission-critical aerospace deployments |
| Moisture Sensitivity Level 1 | Eliminates bake-out requirement prior to reflow, reducing manufacturing cost and risk |
Applications
| Avionics Power Distribution Unit | Automotive Battery Management System |
|---|---|
Use Scenario: Protects 28 V DC main bus in commercial aircraft against induced lightning transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary transient voltage suppressor placed at bus entry point before DC-DC converters and flight control electronics. Use Value: Withstands ≥100 multi-stroke lightning events while maintaining clamping voltage below 146 V, preventing latch-up in downstream FPGAs and ADCs. | Use Scenario: Shields BMS microcontroller and cell monitor ICs from load dump transients during alternator regulation failure. IC Role / Device Role / Timing Role: Bidirectional TVS mounted across battery input terminals to clamp both positive and negative spikes. Use Value: 18 kW PPP rating absorbs 12 V system load dump energy without derating, eliminating need for parallel devices. |
| Industrial Uninterruptible Power Supply | Railway Signaling Interface |
Use Scenario: Guards AC/DC rectifier output stage against grid-switching transients and nearby lightning strikes. IC Role / Device Role / Timing Role: Secondary surge protector downstream of MOV-based primary stage, providing precise clamping. Use Value: Tight 100–111 V V(BR) window ensures predictable turn-on before sensitive SMPS controllers reach overvoltage trip thresholds. | Use Scenario: Protects RS-485 communication ports on trackside signaling modules exposed to traction current surges. IC Role / Device Role / Timing Role: Bidirectional TVS on differential pair, referenced to isolated ground plane. Use Value: <5 ns response time prevents data corruption during 2 kV EFT bursts per IEC 61000-4-4, preserving protocol integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ90CA | 600 W PPP rating, SMA package, RθJC ≈ 40 °C/W | Rated only for single-stroke surges; unsuitable for DO-160 multi-stroke validation | Select MAPLAD18KP90CAE3 when multi-stroke endurance or aerospace qualification is required. |
| Vishay V275LA20AP | 275 VAC varistor, 10 kA 8/20 μs rating, no defined clamping voltage spec | Slower response (>50 ns), higher clamping scatter, not bidirectional in same sense | Select MAPLAD18KP90CAE3 when precise clamping, nanosecond response, and DO-160 compliance are mandatory. |
Compared with SMAJ90CA and V275LA20AP, MAPLAD18KP90CAE3 provides 30× higher peak power handling, certified multi-stroke capability, and validated sub-5 ns response-making it the only choice for certified avionics and high-end automotive ECU protection where failure is not an option.
Availability
MAPLAD18KP90CAE3 is available at Aetrix Electronics and suitable for avionics power distribution, automotive battery management, and industrial UPS applications requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MAPLAD18KP90CAE3 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 analog, mixed-signal, and power semiconductors for aerospace, defense, and industrial markets.
The MAPLAD18KP90CAE3 belongs to Microsemi's high-power PLAD TVS family, engineered specifically for certified lightning and load-dump protection in safety-critical platforms where standard TVS diodes fail under repeated stress.
FAQ
What is the clamping voltage of MAPLAD18KP90CAE3 at its rated peak pulse current?
The MAPLAD18KP90CAE3 has a maximum clamping voltage (VC) of 146 V when subjected to its rated peak impulse current (IPP) of 124 A under 10/1000 μs waveform conditions. This value is guaranteed per the datasheet's electrical characteristics table and defines the upper voltage limit imposed on protected circuitry during surge events. The MAPLAD18KP90CAE3 maintains this clamping performance across its qualified temperature range and after multiple surge strikes.
Is MAPLAD18KP90CAE3 suitable for RTCA DO-160F Section 22 lightning testing?
Yes, MAPLAD18KP90CAE3 is explicitly rated for RTCA DO-160F Section 22 multi-stroke lightning protection, including Waveform 4 (6.4/69 μs) Level 4 compliance. Its 18,000 W peak pulse power rating, low clamping voltage, and validated thermal design enable it to pass repeated stroke testing without parameter shift. The MAPLAD18KP90CAE3 datasheet cites DO-160F compliance as a core design objective.
How does the metal-base package of MAPLAD18KP90CAE3 improve thermal performance?
The MAPLAD18KP90CAE3 uses a metal-base PLAD package with a measured junction-to-case thermal resistance (RθJC) of 0.7 °C/W - over 50× better than standard SMC/SMA packages. This allows direct conduction of surge energy into PCB copper or external heatsinks, preventing thermal runaway during repetitive transients. The MAPLAD18KP90CAE3 requires no thermal vias or complex layout to achieve full 18 kW rating.
Does MAPLAD18KP90CAE3 meet AEC-Q101 reliability standards?
Yes, MAPLAD18KP90CAE3 is tested in accordance with AEC-Q101 requirements for discrete semiconductors, including high-temperature operating life, temperature cycling, and surge robustness. Its qualification supports use in automotive battery management and engine control units. The MAPLAD18KP90CAE3 datasheet confirms AEC-Q101 compliance as a baseline reliability attribute.
What is the meaning of the "CA" suffix in MAPLAD18KP90CAE3?
The "CA" suffix in MAPLAD18KP90CAE3 denotes bidirectional construction - indicating symmetrical clamping behavior for both positive and negative transients. This differs from unidirectional variants (e.g., MAPLAD18KP90AE3), which clamp only in reverse bias. The MAPLAD18KP90CAE3 is therefore ideal for protecting AC-coupled signals, floating DC rails, or systems where polarity reversal cannot be guaranteed.
MAPLAD18KP90CAE3 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 1169A (1.169kA)
- 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
MAPLAD18KP90CAE3 FAQ
1.How can I place an order for MAPLAD18KP90CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP90CAE3 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 MAPLAD18KP90CAE3 reliable?
The price and inventory of MAPLAD18KP90CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP90CAE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP90CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP90CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP90CAE3?
MAPLAD18KP90CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP90CAE3 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 MAPLAD18KP90CAE3?
For technical support, including MAPLAD18KP90CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP90CAE3 requirements.
6.How does Aetrix verify that MAPLAD18KP90CAE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP90CAE3 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 MAPLAD18KP90CAE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP90CAE3?
All MAPLAD18KP90CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP90CAE3, 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 MAPLAD18KP90CAE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP90CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP90CAE3 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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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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