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Microchip Technology MPLAD18KP200A
- Part No.:
- MPLAD18KP200A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP200A.pdf
- Description:
- TVS DIODE 200VWM 322VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,492
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Product details
Overview
MPLAD18KP200A from Microsemi is a unidirectional 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, features a 200 V reverse standoff voltage (VWM), clamps to ≤322 V at 322 A peak impulse current (IPP), and exhibits 0.7 °C/W junction-to-case thermal resistance for enhanced thermal management in lightning and load-dump protection circuits.
For engineers reviewing the MPLAD18KP200A datasheet, MPLAD18KP200A pinout, MPLAD18KP200A application, or MPLAD18KP200A equivalent, this device is selected for secondary lightning protection per IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances), RTCA DO-160F Waveform 4 Level 4 compliance, and high-reliability applications requiring AEC-Q101 qualification and MIL-PRF-19500 upscreening options.
Technical Context
The MPLAD18KP200A operates as a silicon avalanche diode-based TVS with unidirectional polarity and cathode-on-base configuration. Its breakdown voltage range is 222–245 V at specified test current, with clamping voltage guaranteed ≤322 V under 322 A 10/1000 μs surge, enabling robust overvoltage suppression in DC bus and power rail protection.
Thermal design is optimized via low RθJC (0.7 °C/W) and void-free UL94V-0 epoxy packaging, supporting operation from –55 °C to +150 °C. It meets IEC 61000-4-2/4-4/4-5, RTCA DO-160F Waveform 4 & 5A, and AEC-Q101 stress requirements without derating below 100 °C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains multi-stroke lightning surges per RTCA DO-160 Section 22 |
| Reverse Standoff Voltage (VWM) | 200 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Clamping Voltage (VC) | ≤322 V @ IPP = 322 A - limits downstream component stress during surge events |
| Breakdown Voltage (V(BR)) | 222–245 V @ I(BR) - defines precise avalanche onset threshold for predictable protection |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to heatsink or PCB copper, critical for repeated surge duty |
| Steady-State Power Dissipation | 71 W @ TC = 100 °C - supports continuous thermal loading when mounted on heatsink |
| Surge Current Rating (IPP) | 322 A @ 10/1000 μs - quantifies maximum single-event current handling capability |
| Temperature Range | –55 °C to +150 °C - qualified for extended environmental operation in avionics and engine bay locations |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anode Down) with metal base cathode termination. Dimensions: 12.32 × 10.54 × 5.33 mm (L × W × H), weight ≈1 g. Cathode is the metal base (bottom side); anode is top-side metallization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary heat path and high-current return node; must be soldered to large copper pour or heatsink |
| Top-Side Metallization | Anode | Input connection point for protected line; requires controlled trace width and minimal inductance |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMT construction | Enables integration into space-constrained avionics and automotive ECUs without height clearance issues |
| AEC-Q101 qualified | Validated for automotive power electronics including alternator load dump and battery line protection |
| RTCA DO-160F Waveform 4 Level 4 compliance | Meets aircraft pin-injection immunity requirements for 6.4/69 μs transients at 200 V VWM |
| IEC 61000-4-5 Class 1–5 support (42 Ω source) | Provides certified secondary lightning protection for industrial control cabinets and telecom power supplies |
| MIL-PRF-19500 upscreening option | Supports high-reliability programs requiring lot traceability, 3σ ID screening, and conformance inspection |
Applications
| Avionics Power Distribution | Automotive Alternator Protection |
|---|---|
Use Scenario: Protecting 28 V DC distribution buses in commercial aircraft against lightning-induced transients per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS placed across main bus input to clamp surges before reaching upstream converters and avionics LRUs. Use Value: With 322 A IPP and 322 V clamping, MPLAD18KP200A limits bus overvoltage to safe levels while surviving >100 multi-stroke events at 0.05% duty cycle. | Use Scenario: Safeguarding vehicle ECUs and infotainment systems during 12 V battery line load dump events (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Primary surge clamp on alternator output rail, positioned upstream of DC/DC converters and LDO regulators. Use Value: 18,000 W PPP rating and 0.7 °C/W RθJC enable reliable operation without thermal runaway during repetitive 120 V/400 ms transients. |
| Industrial Motor Drive DC Bus | Telecom Rectifier Output Protection |
Use Scenario: Secondary protection on 200 V DC link of variable-frequency drives exposed to switching transients and induced RFI. IC Role / Device Role / Timing Role: Fast-response avalanche diode suppressing dV/dt spikes from IGBT commutation and contactor bounce. Use Value: Sub-100 ps response time and ≤322 V clamping prevent gate oxide damage to downstream power semiconductors during fast-rising edge events. | Use Scenario: Surge suppression on 48 V DC output of telecom rectifiers subjected to IEC 61000-4-5 combination wave surges. IC Role / Device Role / Timing Role: Bidirectional-capable variant (MPLAD18KP200CA) used in redundant power feeds; unidirectional MPLAD18KP200A applied where polarity is fixed. Use Value: Certified Class 4/5 performance at 42 Ω source impedance ensures compliance with GR-1089-CORE and NEBS Level 3 requirements. |
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 | Lower PPP (600 W), smaller SMB package, higher RθJA (60 °C/W), no AEC-Q101 or DO-160 qualification | General-purpose industrial ESD/surge protection; not suitable for aviation or automotive load dump | Select only for cost-sensitive, non-safety-critical 200 V rail protection with low surge repetition rates |
| SMCJ200A | Higher PPP (1500 W), larger SMC package, RθJC ~1.5 °C/W, AEC-Q101 qualified but no DO-160 testing data published | Automotive body electronics and medium-power industrial controls requiring basic ISO 7637-2 compliance | Choose when 18 kW rating is unnecessary and board space allows SMC footprint; verify thermal margin at 100 °C TC |
Compared with SMBJ200A and SMCJ200A, the MPLAD18KP200A provides 12× and 12× higher peak pulse power respectively, certified DO-160F and IEC 61000-4-5 compliance, and superior thermal performance-making it the sole choice for mission-critical aerospace and high-reliability automotive power protection.
Availability
MPLAD18KP200A is available at Aetrix Electronics and suitable for avionics power distribution, automotive alternator protection, and industrial motor drive DC bus applications requiring stable component supply, long-term lifecycle assurance, and full traceability.
Supply support for MPLAD18KP200A 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, RF, and timing solutions for aerospace, defense, and industrial markets.
The MPLAD18KP200A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump suppression in harsh-environment electronics.
FAQ
What is the clamping voltage of the MPLAD18KP200A at its rated peak pulse current?
The MPLAD18KP200A has a maximum clamping voltage (VC) of 322 V when subjected to its rated peak impulse current (IPP) of 322 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in RF01215 Rev B and ensures downstream circuitry remains within safe operating voltage limits during surge events.
Is the MPLAD18KP200A qualified for automotive applications?
Yes, the MPLAD18KP200A is AEC-Q101 qualified and explicitly designed for automotive load dump protection. Its 18,000 W PPP rating, 200 V VWM, and thermal performance (RθJC = 0.7 °C/W) meet ISO 7637-2 Pulse 5a requirements when properly mounted on heatsink-equipped PCBs.
Does the MPLAD18KP200A comply with RTCA DO-160 lightning standards?
Yes, the MPLAD18KP200A is certified for RTCA DO-160F Section 22 multi-stroke lightning testing. It achieves Level 4 pin injection protection for Waveform 4 (6.4/69 μs) and supports secondary lightning protection per DO-160 up to Level 5 for lower-voltage variants - confirmed in RF01215 Rev B Table on page 4.
What is the thermal resistance and how does it impact heatsinking for the MPLAD18KP200A?
The MPLAD18KP200A has a junction-to-case thermal resistance (RθJC) of 0.7 °C/W. This low value means that for every watt of steady-state power dissipated, the junction rises only 0.7 °C above case temperature - enabling effective thermal management using standard PCB copper pours or bolted heatsinks, especially critical during repetitive surge duty cycles.
Can the MPLAD18KP200A be used in bidirectional configurations?
No - the MPLAD18KP200A is unidirectional. For bidirectional operation, the designated variant is MPLAD18KP200CA (with "CA" suffix). The "A" suffix confirms unidirectional polarity, and the cathode is located on the metal base, making polarity reversal unsafe and electrically nonfunctional.
MPLAD18KP200A 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
MPLAD18KP200A FAQ
1.How can I place an order for MPLAD18KP200A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP200A 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 MPLAD18KP200A reliable?
The price and inventory of MPLAD18KP200A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP200A is usually 5 days.
3.What payment methods are accepted for MPLAD18KP200A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP200A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP200A?
MPLAD18KP200A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP200A 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 MPLAD18KP200A?
For technical support, including MPLAD18KP200A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP200A requirements.
6.How does Aetrix verify that MPLAD18KP200A is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP200A 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 MPLAD18KP200A meets industry standards.
7.What is the process for return or replacement of MPLAD18KP200A?
All MPLAD18KP200A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP200A, 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 MPLAD18KP200A part is unused and in its original packaging.
Return procedure for MPLAD18KP200A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP200A Tags
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