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Microchip Technology MPLAD18KP8.0CA
- Part No.:
- MPLAD18KP8.0CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP8.0CA.pdf
- Description:
- TVS DIODE 8VWM 13.6VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,055
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Product details
Overview
MPLAD18KP8.0CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial systems. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 8.0 V reverse standoff voltage (VWM), clamps to ≤13.6 V at 1324 A peak current, and meets RTCA DO-160F Level 4 pin injection and IEC 61000-4-5 Class 1–5 secondary lightning protection.
For engineers reviewing the MPLAD18KP8.0CA datasheet, MPLAD18KP8.0CA pinout, MPLAD18KP8.0CA application, or MPLAD18KP8.0CA equivalent, this device is selected for high-reliability DC bus, avionics power input, and automotive ECU protection where multi-stroke lightning immunity, low thermal resistance (RθJC = 0.7 °C/W), and RoHS-compliant SMT packaging are critical.
Technical Context
The MPLAD18KP8.0CA employs an avalanche diode structure optimized for bidirectional clamping across both polarities, enabling symmetric transient suppression without polarity sensitivity. Its thermally enhanced metal-base package minimizes junction-to-case thermal resistance (0.7 °C/W), supporting sustained multi-pulse operation under RTCA DO-160 Section 22 test conditions.
It is characterized for IEC 61000-4-2 ESD (±15 kV air/±8 kV contact), IEC 61000-4-4 EFT (40 A), and IEC 61000-4-5 surge (42 Ω, 12 Ω, and 2 Ω source impedances), with validated performance up to 1324 A IPP at 10/1000 μs and <5 ns response time - critical for protecting sensitive analog and digital inputs in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains full-rated lightning surge energy without degradation |
| Reverse Standoff Voltage (VWM) | 8.0 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 8.89–9.83 V @ I(BR) - ensures reliable avalanche conduction onset within defined tolerance |
| Max Clamping Voltage (VC) | 13.6 V @ 1324 A - limits downstream voltage stress during worst-case surge |
| Standby Current (ID) | 450 μA @ VWM - negligible leakage at operating voltage, preserving system efficiency |
| Thermal Resistance (RθJC) | 0.7 °C/W - enables direct heat sinking to PCB copper or external heatsink for thermal management |
| Response Time | <5 ns - fast enough to protect sub-nanosecond-sensitive interfaces like CAN FD or RS-485 transceivers |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anodeless Diode) with metal baseplate for thermal conduction; void-free UL94V-0 epoxy body; tin-plated terminals; polarity marked by cathode on metal backside (bidirectional symmetry eliminates anode/cathode distinction in circuit layout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Top-side pad) | Anode/Cathode (bidirectional) | Electrically symmetric - connects to protected line; no polarity assignment required |
| Terminal 2 (Metal baseplate) | Common reference / thermal path | Must be soldered to large copper pour or heatsink; serves as primary thermal dissipation path and functional ground reference |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Enables single-device protection of AC-coupled or floating lines without polarity concerns |
| 18 kW peak pulse rating | Meets RTCA DO-160F Section 22 multi-stroke lightning requirements for aircraft electronics |
| 0.7 °C/W junction-to-case thermal resistance | Supports >100 pulses at 0.05% duty cycle without thermal runaway when mounted per recommended pad layout |
| IEC 61000-4-5 compliance (42 Ω, 12 Ω, 2 Ω) | Validated for Class 1–5 secondary lightning protection in telecom and industrial control cabinets |
| RoHS-compliant (e3 marking) | Meets global environmental regulations without compromising surge robustness or thermal performance |
Applications
| Aerospace Power Input Protection | Automotive ECU Power Bus |
|---|---|
Use Scenario: Protecting 28 V DC power inputs of flight control computers and sensor modules against induced lightning transients per RTCA DO-160F Waveform 4 and 5A. IC Role / Device Role / Timing Role: Primary TVS clamp placed upstream of DC-DC converters and LDOs to limit voltage excursions below 13.6 V during 1324 A surges. Use Value: Eliminates need for redundant clamping stages while maintaining compliance with Level 4 pin injection and multi-stroke endurance requirements. | Use Scenario: Safeguarding 12 V battery-fed engine control units (ECUs) from load dump and ISO 7637-2 transient spikes. IC Role / Device Role / Timing Role: Bidirectional transient suppressor across battery rail and ground, absorbing up to 18 kW energy without failure. Use Value: Withstands repeated 12 V load dump events (ISO 16750-2) and meets AEC-Q101 qualification for automotive under-hood deployment. |
| Industrial Motor Drive DC Link | Railway Signaling Interface |
Use Scenario: Clamping voltage overshoot on 400 V DC link capacitors caused by IGBT switching transients and regenerative braking energy. IC Role / Device Role / Timing Role: High-power TVS connected between DC+ and DC− rails to clamp commutation spikes within safe margin of IGBT VCES rating. Use Value: 0.7 °C/W RθJC allows direct mounting to aluminum heatsink, enabling stable operation at 85°C ambient with no derating loss. | Use Scenario: Protecting 75 Ω coaxial signaling lines in train-borne ATP systems from EFT bursts and induced surges in electromagnetic-heavy rail environments. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair inputs of RS-422 receivers to suppress common-mode transients up to 1324 A. Use Value: <5 ns response time prevents data corruption during 5/50 ns EFT bursts; clamping at 13.6 V preserves receiver input integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA | 600 W PPP rating, 10× lower surge capacity; SMB package with RθJA ≈ 40 °C/W | Not suitable for DO-160F Section 22 or IEC 61000-4-5 Class 4/5; limited to consumer-grade surge zones | Select only for cost-sensitive, low-energy applications where 18 kW capability is unnecessary |
| SMCJ8.0CA | 1500 W PPP, SMC package, RθJC ≈ 2.5 °C/W - 7× lower power handling than MPLAD18KP8.0CA | Cannot meet multi-stroke lightning testing; lacks AEC-Q101 and MIL-PRF-19500 screening options | Use where space constraints prohibit PLAD footprint but higher reliability than SMBJ is required |
Compared with SMBJ8.0CA and SMCJ8.0CA, the MPLAD18KP8.0CA provides 30× and 12× higher peak pulse power respectively, integrated metal-base thermal path for board-level heatsinking, and qualification for aerospace-grade surge standards - making it irreplaceable in mission-critical high-energy protection roles.
Availability
MPLAD18KP8.0CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU power conditioning, and industrial motor drive DC link protection requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MPLAD18KP8.0CA 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 ruggedized discrete components.
The MPLAD series was developed specifically for high-energy transient suppression in safety-critical platforms - delivering certified lightning immunity, thermal robustness, and extended temperature operation from −55°C to +150°C.
FAQ
What is the clamping voltage of the MPLAD18KP8.0CA at its rated peak pulse current?
The MPLAD18KP8.0CA has a maximum clamping voltage (VC) of 13.6 V at 1324 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is guaranteed per the datasheet's Electrical Characteristics table and defines the upper voltage limit imposed on protected circuits during worst-case surge events. The MPLAD18KP8.0CA maintains this clamping performance across its full operating temperature range when properly mounted per the recommended pad layout.
Does the MPLAD18KP8.0CA require heatsinking, and how is thermal management implemented?
Yes - the MPLAD18KP8.0CA relies on its metal baseplate for effective thermal dissipation. Its 0.7 °C/W junction-to-case thermal resistance requires soldering the baseplate to a large copper pour or external heatsink. Unlike standard SMT diodes, the MPLAD18KP8.0CA's thermal path is through the bottom metal surface, not the leads; therefore, PCB layout must follow the specified pad dimensions (12.32 × 10.54 mm min) to ensure mechanical stability and thermal performance. The MPLAD18KP8.0CA achieves full 18 kW rating only when thermally anchored per Microsemi's mounting guidelines.
Is the MPLAD18KP8.0CA qualified for automotive applications, and what standards does it meet?
Yes - the MPLAD18KP8.0CA is AEC-Q101 qualified for automotive use and supports load dump protection per ISO 16750-2. It also meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge) across multiple source impedances (42 Ω, 12 Ω, 2 Ω). While not explicitly branded "automotive grade" in nomenclature, its screening, surge validation, and thermal design make the MPLAD18KP8.0CA suitable for under-hood ECUs, ADAS power supplies, and gateway modules where high-reliability transient suppression is mandatory.
How does the bidirectional construction of the MPLAD18KP8.0CA affect circuit placement and layout?
The bidirectional construction of the MPLAD18KP8.0CA eliminates polarity constraints: either terminal can connect to the protected line, and the metal baseplate serves as the common reference. Layout requires no orientation alignment - unlike unidirectional TVS diodes, the MPLAD18KP8.0CA functions identically regardless of rotation on the PCB. However, the baseplate must remain electrically connected to system ground or the return path to enable proper clamping action and thermal conduction. This symmetry simplifies routing in differential or floating systems.
Can the MPLAD18KP8.0CA be used for both AC and DC line protection, and what are the key considerations?
Yes - the MPLAD18KP8.0CA's bidirectional architecture makes it suitable for both AC and DC line protection. For AC applications (e.g., 24 VAC control signals), it clamps transients on both half-cycles without rectification. For DC, it protects against reverse-polarity surges and switching noise. Key considerations include ensuring the 8.0 V VWM is ≥ peak operating voltage (e.g., ≤5.6 V RMS for AC), verifying thermal interface integrity, and confirming that clamping voltage (13.6 V) remains below the withstand rating of downstream components. The MPLAD18KP8.0CA performs reliably in either configuration when applied within its specified electrical and thermal boundaries.
MPLAD18KP8.0CA 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 1324A (1.324kA)
- 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
MPLAD18KP8.0CA FAQ
1.How can I place an order for MPLAD18KP8.0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP8.0CA 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 MPLAD18KP8.0CA reliable?
The price and inventory of MPLAD18KP8.0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP8.0CA is usually 5 days.
3.What payment methods are accepted for MPLAD18KP8.0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP8.0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP8.0CA?
MPLAD18KP8.0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP8.0CA 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 MPLAD18KP8.0CA?
For technical support, including MPLAD18KP8.0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP8.0CA requirements.
6.How does Aetrix verify that MPLAD18KP8.0CA is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP8.0CA 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 MPLAD18KP8.0CA meets industry standards.
7.What is the process for return or replacement of MPLAD18KP8.0CA?
All MPLAD18KP8.0CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP8.0CA, 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 MPLAD18KP8.0CA part is unused and in its original packaging.
Return procedure for MPLAD18KP8.0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP8.0CA Tags
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Diodes Incorporated
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