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Microchip Technology MPLAD18KP200CA
- Part No.:
- MPLAD18KP200CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP200CA.pdf
- Description:
- TVS DIODE 200VWM 322VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,254
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Product details
Overview
MPLAD18KP200CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps at ≤322 V under 5 A peak impulse current, and features a 200 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (222–245 V). It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection (Waveform 4) and IEC 61000-4-5 Class 1–5 secondary lightning protection.
For engineers reviewing the MPLAD18KP200CA datasheet, MPLAD18KP200CA pinout, MPLAD18KP200CA application, or MPLAD18KP200CA equivalent, this device is selected for high-reliability DC bus protection where multi-stroke lightning immunity, low thermal resistance (RθJC = 0.7 °C/W), and RoHS-compliant SMT mounting are mandatory - especially in avionics power distribution units and 24/28 V vehicle electronics.
Technical Context
This TVS diode uses an avalanche breakdown mechanism to clamp transients within nanoseconds, with <5 ns response time for bidirectional operation. Its metal-base package enables direct thermal coupling to heatsinks, supporting sustained surge handling under ≤0.05% duty cycle per MIL-STD-750 test conditions.
It complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (lightning) using 2 Ω, 12 Ω, and 42 Ω source impedances - validated across Classes 1–5 depending on impedance. Pin injection testing per RTCA/DO-160F Waveform 4 confirms robustness against coupled transients in aircraft wiring harnesses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains single-stroke lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 200 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Clamping Voltage (VC @ IPP) | 322 V @ 5 A - limits downstream circuit voltage during surge to protect 250 V-rated components |
| Breakdown Voltage (V(BR)) | 222–245 V @ I(BR) - ensures reliable conduction onset above operating rail |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to PCB copper or external heatsink |
| Moisture Sensitivity Level | Level 1 (IPC/JEDEC J-STD-020B) - no dry pack or bake required prior to reflow |
| RoHS Compliance | e3 marking - lead-free matte-tin plating compatible with Pb-free soldering processes |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anode/Cathode) with metal baseplate for thermal conduction. Dimensions: 12.32 × 10.54 × 5.33 mm (L × W × H); weight ≈ 1 g. Cathode terminal is the exposed metal base (bottom side), anode is top-side metallization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top-side metallization) | Positive surge path input | Connects to protected line (e.g., 28 V DC bus); forms bidirectional conduction path with cathode |
| Cathode (metal baseplate) | Common reference / heat sink interface | Must be soldered to large copper pour or heatsink; serves as primary thermal and electrical return path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled or floating DC lines (e.g., CAN bus, sensor inputs) without polarity constraints |
| Low RθJC (0.7 °C/W) | Enables >90% of surge energy dissipation through case, reducing junction temperature rise during repeated strikes |
| AEC-Q101 qualification | Validated for automotive under-hood environments including temperature cycling, humidity, and mechanical shock |
| RTCA DO-160F Level 4 compliance | Guarantees survivability against 6.4/69 μs pin-injected transients up to 200 V standoff - critical for avionics EMI hardening |
| Traceable wafer/assembly lots | Supports full lot-level reliability reporting for DO-254/DO-178C-certified systems and military procurement |
Applications
| Aerospace Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC power bus in commercial aircraft flight control computers subjected to DO-160 Section 22 lightning-induced surges. IC Role / Device Role / Timing Role: Primary transient suppression element placed upstream of DC-DC converters and microcontroller power rails. Use Value: Clamps 18 kW surges to ≤322 V within <5 ns, preventing latch-up or burnout in downstream 3.3 V/5 V logic supplies. |
Use Scenario: 12/24 V battery-fed engine control unit (ECU) exposed to ISO 7637-2 Load Dump pulses up to 120 V. IC Role / Device Role / Timing Role: Bidirectional TVS mounted directly at connector entry point to absorb both positive and negative transients. Use Value: Withstands 1000 A surge current while maintaining VWM ≥200 V - avoids false triggering during normal alternator regulation. |
| Industrial Motor Drive DC Link | Railway Signaling Interface |
Use Scenario: 400 V DC link in variable-frequency drives subject to IGBT switching transients and grid fault coupling. IC Role / Device Role / Timing Role: Secondary protection stage after MOVs, absorbing fast-rising edge spikes that bypass bulk clamping. Use Value: 322 V clamping voltage ensures MOSFET gate drivers remain below absolute max rating during 10/1000 μs events. |
Use Scenario: 72 V signaling lines in European railway interlocking systems requiring EN 50121-3-2 Class 3 immunity. IC Role / Device Role / Timing Role: Bidirectional TVS on track circuit receiver inputs to suppress induced surges from nearby traction currents. Use Value: Validated for IEC 61000-4-5 with 42 Ω source impedance - matches real-world rail infrastructure coupling models. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ200CA | Lower PPP (600 W), smaller SMB package, RθJC ≈ 40 °C/W | Suitable only for single-event, low-duty-cycle surges; not rated for RTCA DO-160 multi-stroke testing | Select when cost and board space constrain requirements, and surge energy is <10% of MPLAD18KP200CA capability |
| SMCJ200CA | 1500 W PPP, SMC package, RθJC ≈ 12 °C/W, no AEC-Q101 or DO-160 validation | Lacks aviation-grade qualification; limited to industrial/commercial use with lower reliability traceability | Choose for non-safety-critical 200 V DC systems where full aerospace screening is unnecessary |
Compared with SMBJ200CA and SMCJ200CA, the MPLAD18KP200CA provides 30× higher peak power handling, certified multi-stroke lightning resilience, and metal-base thermal performance essential for mission-critical platforms - making it irreplaceable in avionics and high-end automotive ECUs despite its larger footprint.
Availability
MPLAD18KP200CA is available at Aetrix Electronics and suitable for aerospace power distribution, automotive load dump protection, and industrial motor drive DC link applications requiring stable component supply across extended product lifecycles.
Supply support for MPLAD18KP200CA 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 and mixed-signal semiconductors for aerospace, defense, and industrial markets, with emphasis on radiation-hardened, high-power, and safety-critical applications.
The MPLAD18KP200CA belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection in avionics and harsh-environment vehicle electronics where thermal robustness and qualification traceability are mandatory.
FAQ
What is the clamping voltage of MPLAD18KP200CA at its rated peak pulse current?
The MPLAD18KP200CA has a maximum clamping voltage (VC) of 322 V at 5 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is measured per Figure 3 in RF01215 Rev B and ensures downstream 250 V-rated components remain within safe operating limits during surge events. The clamping behavior is bidirectional and symmetric due to the CA suffix construction.
Is MPLAD18KP200CA qualified for automotive applications?
Yes, the MPLAD18KP200CA is AEC-Q101 qualified, confirming its suitability for automotive under-hood and powertrain applications. It passes stress tests including temperature cycling, high-temperature reverse bias, and surge testing per AEC standards. Its 200 V VWM and 322 V clamping make it ideal for 24 V/28 V load dump protection in ECUs and ADAS modules.
Does MPLAD18KP200CA require special PCB layout considerations?
Yes - the MPLAD18KP200CA's metal baseplate (cathode) must be soldered to a minimum 25 mm² copper area or external heatsink to achieve its specified RθJC of 0.7 °C/W. Pad layout per RF01215 Rev B specifies 12.32 × 10.54 mm footprint with thermal vias recommended. Avoid narrow traces between anode and protected line to preserve surge current path integrity.
Can MPLAD18KP200CA be used for RTCA DO-160F lightning protection?
Yes, the MPLAD18KP200CA is explicitly listed in RF01215 Rev B for RTCA DO-160F Section 22 multi-stroke lightning compliance and Waveform 4 (6.4/69 μs) Level 4 pin injection testing. Its 18 kW PPP rating and sub-5 ns response enable it to meet aircraft-level surge immunity without derating when mounted per recommended pad layout.
What does the "CA" suffix indicate in MPLAD18KP200CA?
The "CA" suffix denotes bidirectional construction - meaning the MPLAD18KP200CA provides symmetrical clamping for both positive and negative transients. Unlike unidirectional variants (e.g., MPLAD18KP200A), it has no polarity dependency and is used where signal lines or power buses may experience voltage reversals, such as in differential communication interfaces or floating DC systems.
MPLAD18KP200CA 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):
- 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
MPLAD18KP200CA FAQ
1.How can I place an order for MPLAD18KP200CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP200CA 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 MPLAD18KP200CA reliable?
The price and inventory of MPLAD18KP200CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP200CA is usually 5 days.
3.What payment methods are accepted for MPLAD18KP200CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP200CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP200CA?
MPLAD18KP200CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP200CA 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 MPLAD18KP200CA?
For technical support, including MPLAD18KP200CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP200CA requirements.
6.How does Aetrix verify that MPLAD18KP200CA is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP200CA 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 MPLAD18KP200CA meets industry standards.
7.What is the process for return or replacement of MPLAD18KP200CA?
All MPLAD18KP200CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP200CA, 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 MPLAD18KP200CA part is unused and in its original packaging.
Return procedure for MPLAD18KP200CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP200CA Tags
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