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Microchip Technology MAPLAD18KP100A
- Part No.:
- MAPLAD18KP100A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP100A.pdf
- Description:
- TVS DIODE 100VWM 162VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,610
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Product details
Overview
MAPLAD18KP100A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) rated for 18,000 W peak pulse power at 10/1000 μs, with 100 V reverse standoff voltage (VWM), 111–123 V breakdown voltage (V(BR)), and 162 V maximum clamping voltage (VC) at 112 A peak pulse current - designed for secondary lightning protection and load dump suppression in aerospace and automotive power systems.
For engineers reviewing the MAPLAD18KP100A datasheet, MAPLAD18KP100A pinout, MAPLAD18KP100A application, or MAPLAD18KP100A equivalent, key selection criteria include IEC 61000-4-5 compliance at 42 Ω, RTCA DO-160F Waveform 4 Level 4 capability, thermal resistance of 0.7 °C/W junction-to-case, and RoHS-compliant matte-tin plating for high-reliability soldering.
Technical Context
The MAPLAD18KP100A employs an avalanche diode structure optimized for high-energy transients, delivering sub-100 ps response time to clamp overvoltage events before system damage occurs. Its metal-base cathode construction enables low thermal resistance (RθJC = 0.7 °C/W) and efficient heat transfer to PCB copper pads or heatsinks.
It meets multi-stroke lightning immunity per RTCA DO-160 Section 22 and supports secondary surge protection per IEC 61000-4-5 across 2 Ω, 12 Ω, and 42 Ω source impedances - with Class 1–5 coverage at 42 Ω and Class 2–4 at 12 Ω. Standby leakage is limited to 10 μA at 100 V, ensuring minimal impact on upstream circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains full-rated surge energy without degradation under ≤0.05% duty cycle |
| Reverse Standoff Voltage (VWM) | 100 V - maximum continuous operating voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 111–123 V @ I(BR) - defines reliable avalanche onset threshold for design margining |
| Clamping Voltage (VC) | 162 V @ 112 A IPP - limits downstream voltage stress during worst-case surge |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables direct thermal coupling to heatsink or large copper pour for sustained reliability |
| Standby Leakage Current (ID) | 10 μA @ VWM - negligible power loss in standby, critical for battery-backed or low-power systems |
| Response Time | <100 ps - ensures clamping activation prior to IC-level damage thresholds |
Pinout & Package
MAPLAD18KP100A uses a surface-mount PLAD package with two terminals: anode and cathode. The cathode is the metal base (bottom side) of the device; polarity is marked on body. Package dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), with recommended FR4 pad layout per RF01215 Rev B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive input terminal | Connected to protected line (e.g., 28 V aircraft bus); clamps to cathode when overvoltage exceeds V(BR) |
| Cathode | Reference/ground terminal | Mounted to metal baseplate or large copper pour; serves as thermal and electrical reference point |
Key Features
| Feature | Design Value |
|---|---|
| High-reliability wafer lot traceability | Full fabrication and assembly lot tracking per MIL-PRF-19500 upscreening options available |
| Low-profile SMT package | 5.08 mm height enables integration into space-constrained avionics and engine control modules |
| RTCA DO-160F Waveform 4 Level 4 compliance | Withstands 6.4/69 μs pin-injection surges up to 100 V standoff - validated for aircraft wiring harness protection |
| IEC 61000-4-5 secondary lightning protection | Class 1–5 certified at 42 Ω source impedance - eliminates need for external series impedance in many airframe designs |
| Moisture sensitivity Level 1 | No dry-pack or bake-out required before reflow - simplifies manufacturing and reduces handling cost |
Applications
| Aerospace Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC distribution bus in commercial aircraft, exposed to lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary secondary surge protector placed at PDU input, clamping fast-rising transients before they reach downstream converters and controllers. Use Value: Enables compliance with DO-160F Waveform 4 Level 4 and multi-stroke lightning testing without derating or parallel staging. | Use Scenario: 12 V/24 V alternator output line in heavy-duty trucks, subject to ISO 7637-2 Load Dump pulses up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between alternator output and main fuse box, absorbing 18 kW energy spikes within microseconds. Use Value: Prevents MOSFET gate oxide failure and microcontroller reset events during abrupt battery disconnection events. |
| Industrial Motor Drive DC Bus | Railway Traction Control Interface |
Use Scenario: DC link bus in 3-phase industrial VFDs, where IGBT switching induces repetitive 1–2 kV transients. IC Role / Device Role / Timing Role: Parallel-mounted TVS across DC+ and DC− rails to limit voltage overshoot during regenerative braking transitions. Use Value: Extends electrolytic capacitor lifetime by limiting peak bus voltage to ≤162 V, even under 112 A surge conditions. | Use Scenario: Signal/power interface board in onboard traction control unit, connecting to 110 V DC train supply with high-impedance fault coupling. IC Role / Device Role / Timing Role: Secondary protection element downstream of primary MOVs, providing precise clamping for sensitive CAN and Ethernet PHY circuits. Use Value: Meets EN 50121-3-2 Class 3 immunity requirements with <10 μA leakage, avoiding false triggering of isolated RS-485 receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100A | 600 W PPP rating, 100 V VWM, SMB package, RθJC ≈ 25 °C/W | Limited to single-stroke surges; not qualified for DO-160 or multi-stroke lightning | Select when cost-sensitive, low-energy, non-aerospace applications require basic ESD/EFT protection only |
| SMCJ100A | 1500 W PPP rating, same VWM, SMC package, RθJC ≈ 12 °C/W | Insufficient for IEC 61000-4-5 Class 4/5 or DO-160F Waveform 4 Level 4 | Use where higher energy than SMBJ is needed but full 18 kW rating is unnecessary - e.g., telecom power entry |
Compared with SMBJ100A and SMCJ100A, the MAPLAD18KP100A delivers 30× and 12× higher peak pulse power respectively, with 35× lower thermal resistance - enabling robust multi-stroke surge endurance in mission-critical aerospace and rail systems where qualification-grade reliability is mandatory.
Availability
MAPLAD18KP100A is available at Aetrix Electronics and suitable for aerospace power distribution, automotive load dump protection, and industrial motor drive DC bus applications requiring stable component supply, long-term lifecycle support, and qualified high-reliability surge suppression.
Supply support for MAPLAD18KP100A 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened solutions for aerospace, defense, and industrial markets.
The MAPLAD18KP100A belongs to Microsemi's PLAD family of high-power surface-mount TVS diodes, engineered specifically for certified lightning and load dump protection in safety-critical platforms where multi-stroke endurance and thermal stability are non-negotiable.
FAQ
What is the clamping voltage of MAPLAD18KP100A at its rated peak pulse current?
The MAPLAD18KP100A has a maximum clamping voltage (VC) of 162 V at 112 A peak pulse current (IPP), measured under 10/1000 μs waveform conditions. This value ensures downstream components see no more than 162 V during worst-case surge events, preserving safe operating margins for 100 V-rated circuitry. The MAPLAD18KP100A achieves this with sub-100 ps response time and low dynamic impedance.
Is MAPLAD18KP100A compliant with RTCA DO-160F Section 22 lightning testing?
Yes, the MAPLAD18KP100A is specifically designed and validated for multi-stroke lightning protection per RTCA DO-160F Section 22. It meets Waveform 4 (6.4/69 μs) Level 4 requirements at 25 °C and supports temperature-derated operation per MicroNote 132. The MAPLAD18KP100A's 18,000 W PPP rating and low RθJC enable repeated stroke endurance without parameter shift.
Does MAPLAD18KP100A require moisture preconditioning before reflow soldering?
No, the MAPLAD18KP100A has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it can be stored and processed without dry packing or baking. This eliminates moisture-related popcorning risk during lead-free reflow and reduces manufacturing overhead. The MAPLAD18KP100A's void-free epoxy body and annealed matte-tin terminations ensure robust solder joint integrity.
How does the thermal performance of MAPLAD18KP100A compare to standard SMC/SMB TVS diodes?
The MAPLAD18KP100A has a junction-to-case thermal resistance (RθJC) of just 0.7 °C/W - over 35× lower than typical SMCJ (≈25 °C/W) or SMBJ (≈30 °C/W) devices. This allows direct mounting to heatsinks or large copper pours, enabling sustained surge handling without thermal runaway. The MAPLAD18KP100A's metal-base cathode is integral to this performance, unlike plastic-body alternatives.
Can MAPLAD18KP100A be used in bidirectional configurations?
No - MAPLAD18KP100A is unidirectional only. For bidirectional operation, the equivalent part is MAPLAD18KP100CA (with 'CA' suffix). The MAPLAD18KP100A's cathode is the metal baseplate, and its anode is the top-side terminal; reversing polarity will cause catastrophic failure. Always verify polarity during PCB layout and assembly to ensure correct orientation of the MAPLAD18KP100A.
MAPLAD18KP100A 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):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 112A
- 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
MAPLAD18KP100A FAQ
1.How can I place an order for MAPLAD18KP100A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP100A 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 MAPLAD18KP100A reliable?
The price and inventory of MAPLAD18KP100A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP100A is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP100A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP100A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP100A?
MAPLAD18KP100A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP100A 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 MAPLAD18KP100A?
For technical support, including MAPLAD18KP100A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP100A requirements.
6.How does Aetrix verify that MAPLAD18KP100A is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP100A 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 MAPLAD18KP100A meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP100A?
All MAPLAD18KP100A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP100A, 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 MAPLAD18KP100A part is unused and in its original packaging.
Return procedure for MAPLAD18KP100A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP100A Tags
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onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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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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