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Microchip Technology MAPLAD18KP13A
- Part No.:
- MAPLAD18KP13A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP13A.pdf
- Description:
- TVS DIODE 13VWM 21.5VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,440
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Product details
Overview
MAPLAD18KP13A from Microsemi is a unidirectional 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 13 V reverse standoff voltage (VWM), clamps to ≤21.5 V at 838 A peak current, and operates across –55°C to +150°C. It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection for aircraft avionics.
For engineers reviewing the MAPLAD18KP13A datasheet, MAPLAD18KP13A pinout, MAPLAD18KP13A application, or MAPLAD18KP13A equivalent, key selection criteria include its 13 V VWM rating, 21.5 V max clamping voltage at 838 A, low 0.7 °C/W junction-to-case thermal resistance, RoHS-compliant e3 plating, and qualification for lightning-level multi-stroke transients per DO-160 Section 22.
Technical Context
The MAPLAD18KP13A employs an avalanche diode structure optimized for fast response (<5 ns clamping rise time) and high cumulative energy handling. Its metal-base package enables direct thermal coupling to PCB copper or heatsinks, supporting sustained surge duty cycles ≤0.05% with minimal derating.
It is specified for secondary lightning protection per IEC 61000-4-5 at 42 Ω, 12 Ω, and 2 Ω source impedances (Class 1–5 depending on configuration), and provides ESD immunity per IEC 61000-4-2 (±30 kV contact) and EFT per IEC 61000-4-4 (±4 kV).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - Maximum continuous DC or peak AC operating voltage before conduction begins |
| V(BR) min/max | 14.4–15.9 V - Breakdown occurs within this range at 1 mA, ensuring reliable turn-on margin above VWM |
| VC @ IPP | ≤21.5 V at 838 A - Clamping voltage limits downstream circuit stress during 10/1000 μs surges |
| PPP | 18,000 W @ 10/1000 μs - Sustains single-stroke lightning-level energy without failure |
| RθJC | 0.7 °C/W - Enables efficient heat transfer from junction to case, critical for repeated surge events |
| ID @ VWM | ≤10 μA - Ultra-low leakage preserves system standby power integrity |
| TJ Range | –55°C to +150°C - Supports operation in engine bay, avionics bays, and other extreme-temperature environments |
Pinout & Package
MAPLAD18KP13A uses a surface-mount, metal-base package (PLAD) with cathode on the bottom metal surface and anode on the top-side metallized pad. The package measures 12.32 × 10.54 × 5.08 mm (L × W × H) and is void-free epoxy molded to UL94V-0 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Pad) | Positive terminal for unidirectional conduction path | Connected to protected line; conducts surge current toward cathode when reverse-biased beyond V(BR) |
| Cathode (Metal Base) | Ground-reference terminal / thermal interface | Soldered directly to large copper pour or heatsink; serves dual role as electrical return and primary thermal path |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW Pulse Power Rating | Enables single-device protection against DO-160 Section 22 lightning waveforms without parallel staging |
| 0.7 °C/W Junction-to-Case Thermal Resistance | Reduces thermal runaway risk during repetitive surges; supports >1000 cycles at 0.05% duty factor |
| AEC-Q101 Qualified | Validated for automotive under-hood applications including load dump and alternator transients |
| RoHS Compliant (e3) | Matte-tin plating ensures reliable solderability and eliminates lead-based assembly constraints |
| RTCA DO-160F Waveform 4 & 5A Compliance | Meets Level 4/5 pin-injection requirements for commercial aircraft flight-critical subsystems |
Applications
| Avionics Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC bus inputs in flight management computers against induced lightning currents per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary TVS clamp placed upstream of DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤21.5 V, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V logic. | Use Scenario: Safeguarding CAN and sensor interfaces in diesel ECU modules exposed to ISO 7637-2 Load Dump pulses. IC Role / Device Role / Timing Role: Unidirectional surge shunt mounted at connector entry point. Use Value: Absorbs 18,000 W surges while maintaining <10 μA leakage, preserving low-power sleep mode integrity. |
| Industrial Motor Drive Control Board | Railway Signaling Interface |
Use Scenario: Shielding encoder feedback lines and gate driver supplies from switching-induced RFI and IGBT turn-off spikes. IC Role / Device Role / Timing Role: Localized TVS at motor control IC power pins. Use Value: Sub-5 ns response clamps transients before they propagate into sensitive analog front-ends or PWM timing circuits. | Use Scenario: Securing 72 V DC signaling inputs in trackside relay modules subjected to IEC 61000-4-5 Class 4 surges (42 Ω source). IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT) primary suppression. Use Value: Provides precise 13 V standoff and low clamping to protect 16-bit ADC references and optocoupler bias rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13A | 600 W PPP rating, 13 V VWM, DO-214AA package, RθJC ≈ 40 °C/W | Lower energy handling; suitable only for IEC 61000-4-4/5 Class 2–3, not DO-160 lightning | Select SMBJ13A only for cost-sensitive industrial controls where surge energy is limited to <100 J. |
| SMCJ13A | 1500 W PPP rating, same VWM, DO-214AB package, RθJC ≈ 15 °C/W | Lacks AEC-Q101 and DO-160 qualification; insufficient for aviation or automotive safety-critical nodes | Choose SMCJ13A for non-certified embedded systems requiring higher energy than SMBJ but below 18 kW demands. |
Compared with SMBJ13A and SMCJ13A, MAPLAD18KP13A delivers 30× and 12× higher peak pulse power respectively, with 0.7 °C/W thermal resistance enabling direct PCB heatsinking-making it the only option qualified for RTCA DO-160F Level 4/5 and IEC 61000-4-5 Class 4/5 in high-reliability transport systems.
Availability
MAPLAD18KP13A is available at Aetrix Electronics and suitable for avionics power distribution, automotive ECU protection, and industrial motor drive control boards requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAPLAD18KP13A 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 discrete components.
The MAPLAD18KP13A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump compliance in safety-critical platforms.
FAQ
What is the maximum clamping voltage of the MAPLAD18KP13A at its rated peak pulse current?
The MAPLAD18KP13A has a maximum clamping voltage (VC) of 21.5 V when subjected to its rated peak pulse current (IPP) of 838 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 operating voltage limits during surge events.
Is the MAPLAD18KP13A qualified for automotive applications?
Yes, the MAPLAD18KP13A is AEC-Q101 qualified and explicitly rated for automotive load dump protection per ISO 7637-2. Its 13 V VWM and 21.5 V clamping voltage align with 12 V system requirements, and its metal-base thermal design supports under-hood ambient temperatures up to +150°C junction temperature.
Does the MAPLAD18KP13A meet RTCA DO-160 lightning standards?
Yes, the MAPLAD18KP13A is designed to meet RTCA DO-160 Section 22 multi-stroke lightning requirements and achieves Level 4 pin injection protection per Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs) at 25°C. Full compliance requires adherence to recommended pad layout and thermal mounting per RF01215 Rev B.
What is the thermal resistance from junction to case for the MAPLAD18KP13A?
The MAPLAD18KP13A has a junction-to-case thermal resistance (RθJC) of 0.7 °C/W, measured with the device mounted on FR4 using the recommended pad layout. This low value enables effective heat dissipation into PCB copper planes or external heatsinks, critical for sustaining repetitive surge events without thermal degradation.
How is polarity identified on the MAPLAD18KP13A package?
The MAPLAD18KP13A is unidirectional, with the cathode located on the metal base (bottom surface) and the anode on the top metallized pad. Polarity is marked by a band or notch on the top surface per Microsemi's PLAD package convention, and the cathode must be connected to the system ground or lowest potential reference plane.
MAPLAD18KP13A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 838A
- 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
MAPLAD18KP13A FAQ
1.How can I place an order for MAPLAD18KP13A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP13A 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 MAPLAD18KP13A reliable?
The price and inventory of MAPLAD18KP13A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP13A is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP13A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP13A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP13A?
MAPLAD18KP13A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP13A 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 MAPLAD18KP13A?
For technical support, including MAPLAD18KP13A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP13A requirements.
6.How does Aetrix verify that MAPLAD18KP13A is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP13A 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 MAPLAD18KP13A meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP13A?
All MAPLAD18KP13A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP13A, 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 MAPLAD18KP13A part is unused and in its original packaging.
Return procedure for MAPLAD18KP13A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP13A Tags
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