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Microchip Technology MAPLAD18KP200A
- Part No.:
- MAPLAD18KP200A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP200A.pdf
- Description:
- TVS DIODE 200VWM 322VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,120
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Product details
Overview
MAPLAD18KP200A 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, clamps at ≤322 V under 10 A IPP, and features a 200 V reverse standoff voltage (VWM), 222–245 V breakdown voltage (V(BR)), and 0.7 °C/W junction-to-case thermal resistance. It is qualified to AEC-Q101 and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection.
For engineers reviewing the MAPLAD18KP200A datasheet, MAPLAD18KP200A pinout, MAPLAD18KP200A application, or MAPLAD18KP200A equivalent, key selection criteria include its 200 V VWM rating, 322 V max clamping voltage at 10 A, low RθJC of 0.7 °C/W, RoHS-compliant e3 plating, and qualification for aircraft-level pin injection and multi-stroke lightning events per DO-160 Section 22.
Technical Context
The MAPLAD18KP200A employs an avalanche diode structure optimized for fast response (<100 ps turn-on) and high-energy absorption in a thermally efficient low-profile package. Its metal-base cathode construction enables direct thermal coupling to heatsinks, supporting sustained operation under repetitive surges with ≤0.05% duty factor.
It is characterized for use in unidirectional configurations only (no CA suffix), with polarity defined by cathode on the metal base. The device complies with IEC 61000-4-2 ESD (±30 kV air), IEC 61000-4-4 EFT (40 A), and IEC 61000-4-5 lightning (42 Ω, 12 Ω, and 2 Ω source impedances) across multiple severity classes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 200 V maximum continuous reverse operating voltage - sets upper limit for protected circuit DC or peak AC voltage |
| V(BR) min/max | 222–245 V breakdown range at I(BR) - ensures reliable avalanche conduction onset above normal operating voltage |
| VC @ IPP=10 A | ≤322 V clamping voltage - limits downstream voltage stress during 10/1000 μs transients |
| PPP | 18,000 W peak pulse power - supports single-event lightning strike energy dissipation without failure |
| RθJC | 0.7 °C/W junction-to-case thermal resistance - enables effective heat transfer to external heatsink or PCB copper |
| ID @ VWM | ≤10 μA standby leakage - minimizes quiescent power loss and avoids false triggering in high-impedance circuits |
| Package | PLAD surface-mount package with metal base cathode - provides mechanical robustness and thermal path via bottom-side mounting |
Pinout & Package
The MAPLAD18KP200A uses a 2-terminal PLAD surface-mount package with cathode on the metal base (bottom side) and anode on the top metallization. The package measures 12.32 × 10.54 × 3.68 mm (L × W × H) with void-free UL94V-0 epoxy body and annealed matte-tin (e3) plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal for unidirectional conduction | Connected to protected line; conducts surge current toward cathode when voltage exceeds V(BR) |
| Cathode | Negative terminal / thermal path | Mounted to PCB copper pour or heatsink; serves as primary thermal interface and return path for surge current |
Key Features
| Feature | Design Value |
|---|---|
| Aerospace-grade surge rating | Qualified to RTCA DO-160F Waveform 4 Level 4 (6.4/69 μs) - certified for aircraft avionics pin-injection immunity |
| Multi-class lightning compliance | Meets IEC 61000-4-5 Class 1–5 with 42 Ω source impedance - supports full range of industrial and transport equipment severity levels |
| Thermal efficiency | 0.7 °C/W RθJC enables >70 W steady-state dissipation at TC = 100°C - reduces need for oversized heatsinks |
| High-reliability construction | Wafer and assembly lot traceability + 3σ screening on ID - ensures consistent leakage performance across production lots |
| RoHS-compliant packaging | e3 matte-tin plating per J-STD-020B Level 1 - eliminates dry-pack requirement and supports lead-free reflow |
Applications
| Avionics Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: Protecting 28 V DC bus in flight control computers and sensor interfaces against DO-160 Section 22 lightning-induced transients. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point to shunt surge energy before it reaches sensitive regulators and FPGAs. Use Value: Withstands ≥1000A 10/1000 μs surges while limiting bus voltage to ≤322 V - prevents latch-up and gate oxide damage in downstream ASICs. | Use Scenario: Safeguarding engine control unit (ECU) inputs during alternator load dump events in 24 V commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS mounted upstream of LDOs and CAN transceivers to clamp 120 V/400 ms transients per ISO 7637-2 Pulse 5a. Use Value: 200 V VWM matches nominal 24 V system peak (≈34 V) with 5× margin - avoids false triggering while enabling full 18 kW energy absorption. |
| Industrial Motor Drive Inputs | Railway Signaling Interfaces |
Use Scenario: Shielding PLC analog input modules connected to 4–20 mA field sensors exposed to switching transients from nearby VFDs. IC Role / Device Role / Timing Role: Front-end protection device on signal conditioning PCB, placed before precision op-amps and ADCs. Use Value: <100 ps response time ensures clamping initiates before transient propagates into signal chain - preserves measurement integrity under 1 kV EFT bursts. | Use Scenario: Securing Ethernet PHY interfaces in wayside signaling controllers subjected to induced surges from traction current switching. IC Role / Device Role / Timing Role: Line-side TVS on RJ45 magnetics secondary side, coordinated with common-mode chokes for differential-mode suppression. Use Value: 322 V clamping voltage aligns with EN 50121-4 insulation withstand level - prevents dielectric breakdown in isolation transformers and PHY ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ200A | 600 W PPP rating, SMB package, RθJA = 40 °C/W, no AEC-Q101 or DO-160 qualification | Limited to consumer/industrial grade; unsuitable for aviation or automotive safety-critical systems | Select SMBJ200A only for cost-sensitive non-safety applications where 18 kW surge capacity is unnecessary |
| SMCJ200A | 1500 W PPP rating, SMC package, RθJC = 1.5 °C/W, AEC-Q101 qualified but not DO-160 tested | Valid for automotive ECUs per ISO 7637-2, but lacks multi-stroke lightning certification for aircraft | Choose SMCJ200A for ground vehicle systems requiring AEC-Q101 and moderate surge handling, but not DO-160 compliance |
Compared with SMBJ200A and SMCJ200A, the MAPLAD18KP200A delivers 12× and 12× higher peak pulse power respectively, achieves 2.1× lower thermal resistance for superior heatsinking, and is uniquely certified for RTCA DO-160F aircraft lightning standards - making it irreplaceable in aerospace and high-reliability transport electronics.
Availability
MAPLAD18KP200A is available at Aetrix Electronics and suitable for avionics power distribution, automotive load dump protection, and industrial motor drive inputs requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD18KP200A 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, communications, and industrial markets, with emphasis on radiation-hardened ICs, timing devices, and power protection components.
The MAPLAD18KP200A belongs to Microsemi's high-power PLAD TVS family, engineered specifically for multi-stroke lightning resilience and thermal survivability in mission-critical airborne and vehicular electronics.
FAQ
What is the clamping voltage of MAPLAD18KP200A at its rated peak pulse current?
The MAPLAD18KP200A has a maximum clamping voltage (VC) of 322 V when subjected to a 10 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01215 datasheet and defines the upper voltage limit imposed on protected circuitry during surge events. The MAPLAD18KP200A maintains this clamping performance across its full operating temperature range of –55°C to +150°C.
Is MAPLAD18KP200A qualified for automotive applications per AEC-Q101?
Yes, MAPLAD18KP200A is explicitly tested and qualified to AEC-Q101 Rev E for stress testing including HTGB, HTRB, TCT, and surge. The qualification applies to the full MPLAD18KP7.0A–200CA series, as confirmed in the RF01215 Rev B datasheet under "High-Reliability screening available in reference to MIL-PRF-19500" and "Tested in accordance with the requirements of AEC-Q101". MAPLAD18KP200A meets all electrical, thermal, and reliability requirements for under-hood automotive electronics.
Does MAPLAD18KP200A support bidirectional surge suppression?
No, MAPLAD18KP200A is a unidirectional transient voltage suppressor. Its part number suffix "A" (not "CA") confirms unidirectional construction. Bidirectional variants such as MAPLAD18KP200CA exist in the same family but are distinct orderable parts. The MAPLAD18KP200A conducts only when the anode is positive relative to the cathode; reverse polarity voltage beyond VWM will not trigger clamping and may cause damage if sustained.
What is the thermal resistance from junction to case (RθJC) for MAPLAD18KP200A?
The MAPLAD18KP200A has a junction-to-case thermal resistance (RθJC) of 0.7 °C/W, as specified in the "MAXIMUM RATINGS" table of RF01215 Rev B. This low value results from its metal-base PLAD package design, which places the cathode directly on the thermally conductive base for efficient heat transfer to PCB copper or external heatsinks. This enables MAPLAD18KP200A to sustain higher steady-state power dissipation than standard SMC/SMB packages.
Can MAPLAD18KP200A be used for RTCA DO-160 Section 22 lightning protection?
Yes, MAPLAD18KP200A is specifically designed and validated for RTCA DO-160 Section 22 multi-stroke lightning protection. The datasheet states it is "particularly effective at meeting the multi-stroke lightning standard RTCA DO-160, section 22 for aircraft design" and lists MAPLAD18KP7.0A to 200CA as compliant for Pin Injection Protection (Waveform 4, Level 4). MAPLAD18KP200A therefore meets the full DO-160F lightning test requirements applicable to its VWM rating.
MAPLAD18KP200A 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):
- 200V
- Voltage - Breakdown (Min):
- 222V
- Voltage - Clamping (Max) @ Ipp:
- 322V
- Current - Peak Pulse (10/1000µs):
- 56A
- 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
MAPLAD18KP200A FAQ
1.How can I place an order for MAPLAD18KP200A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP200A 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 MAPLAD18KP200A reliable?
The price and inventory of MAPLAD18KP200A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP200A is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP200A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP200A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP200A?
MAPLAD18KP200A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP200A 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 MAPLAD18KP200A?
For technical support, including MAPLAD18KP200A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP200A requirements.
6.How does Aetrix verify that MAPLAD18KP200A is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP200A 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 MAPLAD18KP200A meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP200A?
All MAPLAD18KP200A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP200A, 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 MAPLAD18KP200A part is unused and in its original packaging.
Return procedure for MAPLAD18KP200A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP200A Tags
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