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Microchip Technology MPLAD36KP350CA
- Part No.:
- MPLAD36KP350CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP350CA.pdf
- Description:
- TVS DIODE 350VWM 564VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:3,770
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Product details
Overview
MPLAD36KP350CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps at ≤564 V under 100 A peak impulse current, and features a 350 V reverse standoff voltage (VWM), enabling robust secondary lightning protection per IEC 61000-4-5 and RTCA DO-160F Waveform 4 Level 4 compliance.
For engineers reviewing the MPLAD36KP350CA datasheet, MPLAD36KP350CA pinout, MPLAD36KP350CA application, or MPLAD36KP350CA equivalent, this device is selected for high-reliability DC bus protection in avionics power distribution units, engine control modules, and rail-mounted industrial inverters where multi-stroke surge resilience and low thermal resistance are critical.
Technical Context
The MPLAD36KP350CA operates as a silicon avalanche diode with bidirectional clamping symmetry, optimized for fast response (<5 ns turn-on) and minimal clamping overshoot during high-current transients. Its void-free thermosetting epoxy package and metal-base cathode construction enable 1.0 °C/W junction-to-case thermal resistance, supporting sustained operation under repeated 36 kW surges at ≤0.05% duty factor on FR4 PCBs with recommended pad layout.
It meets AEC-Q101 stress testing requirements and supports MIL-PRF-19500 upscreening options (M/MA/MXL levels). Electrical behavior is defined by breakdown voltage range of 389–431 V at 5 mA, maximum clamping voltage of 564 V at 100 A, and standby leakage <10 μA at 350 V - all specified at 25°C with full temperature derating guidance provided.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 36,000 W @ 10/1000 μs - sustains aircraft lightning-induced surges without degradation |
| Reverse Standoff Voltage (VWM) | 350 V - sets maximum continuous operating voltage before clamping activation |
| Clamping Voltage (VC) | ≤564 V @ 100 A - limits downstream circuit voltage during worst-case surge event |
| Breakdown Voltage (V(BR)) | 389–431 V @ 5 mA - defines precise avalanche onset threshold for predictable protection |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to heatsink or copper pour for thermal stability |
| Leakage Current (ID) | ≤10 μA @ 350 V - ensures negligible standby power loss in always-on systems |
| Response Time | <5 ns - reacts faster than system-level EFT or ESD transients to prevent latch-up |
Pinout & Package
Package: PLAD (Plastic Low-profile Avalanche Diode) - surface-mount, metal-base thermally enhanced package with void-free UL94V-0 epoxy body; dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H); weight: ~1.85 g; polarity marked on unidirectional variants only - for MPLAD36KP350CA (bidirectional), no polarity marking required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche terminals | Identical clamping behavior in both directions; no orientation dependency during placement |
| Metal base (bottom side) | Thermal path & electrical terminal | Serves as common connection point and primary heat conduction surface to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Enables single-device protection of AC-coupled or floating DC lines without polarity concerns |
| 36 kW peak pulse rating | Meets RTCA DO-160 Section 22 multi-stroke lightning test requirements for commercial aircraft |
| 1.0 °C/W RθJC | Reduces thermal stress during repetitive surges, extending service life in cyclic environments |
| AEC-Q101 qualified | Validated for automotive under-hood applications including engine control and battery management |
| IEC 61000-4-5 Class 5 support (42 Ω source) | Provides secondary lightning protection for long-distance wiring harnesses in industrial automation |
Applications
| Avionics Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC bus inputs in airborne power management units exposed to lightning-induced surges per DO-160F Waveform 4. IC Role / Device Role / Timing Role: Primary transient suppression device placed at board-level input connector to clamp induced transients before they reach DC-DC converters and microcontrollers. Use Value: With 564 V clamping at 100 A and 36 kW rating, MPLAD36KP350CA prevents overvoltage damage while maintaining system uptime across >100,000 flight cycles. | Use Scenario: Safeguarding 12 V supply rails in diesel engine ECUs subjected to load dump events up to 120 V and 350 A. IC Role / Device Role / Timing Role: Bidirectional TVS placed across battery input to absorb reverse-polarity transients and switching spikes from solenoid drivers. Use Value: Delivers sub-5 ns response and 1.0 °C/W thermal resistance, ensuring reliable clamping even after repeated 120 V/200 ms load dumps without thermal runaway. |
| Railway Traction Inverter Control | Industrial Motor Drive DC Link |
Use Scenario: Secondary surge protection on 350 V DC link monitoring circuits in onboard traction inverters compliant with EN 50121-3-2. IC Role / Device Role / Timing Role: High-energy TVS mounted directly at sensor interface to suppress coupling from IGBT switching noise and rail transients. Use Value: 350 V VWM matches nominal DC link voltage, while 564 V VC ensures analog front-end ICs remain within absolute maximum ratings during 4 kV surge events. | Use Scenario: Protecting gate driver bias supplies in 400 V industrial VFDs exposed to reflected wave surges from long motor cables. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across isolated DC/DC converter output to limit coupled transients to <600 V. Use Value: Metal-base thermal path dissipates 36 kW pulses into PCB ground plane, eliminating need for discrete heatsinks in space-constrained drive modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ350CA | 600 W PPP rating, 5.0 mm × 4.5 mm SMA package, RθJA = 70 °C/W | Rated for consumer/industrial use only; not qualified to AEC-Q101 or DO-160 | Select when cost sensitivity outweighs aerospace/automotive qualification requirements |
| Vishay VMM350CA | 30 kW PPP, TO-277 package, 1.5 °C/W RθJC, 350 V VWM | Lacks DO-160F Waveform 4 Level 4 validation; limited to IEC 61000-4-5 Class 3 | Choose for high-volume automotive ECUs where 30 kW suffices and TO-277 mounting is preferred |
Compared with SMAJ350CA and VMM350CA, the MPLAD36KP350CA provides 6× higher peak pulse power, superior thermal performance (1.0 vs. ≥1.5 °C/W), and formal DO-160F/IEC 61000-4-5 Class 5 certification - making it the only option qualified for mission-critical avionics and heavy-duty automotive load dump protection.
Availability
MPLAD36KP350CA is available at Aetrix Electronics and suitable for avionics power distribution, automotive engine control units, and industrial motor drive DC link protection requiring stable component supply across extended product lifecycles.
Supply support for MPLAD36KP350CA 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) 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 MPLAD36KP350CA belongs to Microsemi's PLAD family of high-power surface-mount TVS diodes, engineered specifically for multi-stroke lightning protection and automotive load dump resilience in safety-critical systems.
FAQ
What is the clamping voltage specification for MPLAD36KP350CA under standard test conditions?
The MPLAD36KP350CA has a maximum clamping voltage (VC) of 564 V at 100 A peak pulse current under 10/1000 μs waveform conditions. This value is measured at 25°C with proper PCB thermal design and represents the upper limit of voltage seen by protected circuitry during a defined surge event. The actual clamping may vary slightly with temperature and mounting configuration, but remains within specification across the full -55°C to +150°C operating range.
Is MPLAD36KP350CA certified for RTCA DO-160F lightning protection testing?
Yes, the MPLAD36KP350CA is validated for RTCA DO-160F Section 22 pin injection protection at Level 4 for Waveform 4 (6.4/69 μs) and supports multi-stroke lightning compliance in aircraft systems. It is explicitly listed in the RF01216 datasheet for Waveform 4 Level 4 up to 350 V VWM, confirming its qualification for primary and secondary lightning protection roles in certified avionics hardware.
Does MPLAD36KP350CA require a heatsink for standard operation?
No, the MPLAD36KP350CA does not require an external heatsink under typical surge conditions due to its 1.0 °C/W junction-to-case thermal resistance and metal-base package design. When mounted on FR4 PCB with the recommended 11.94 mm × 5.85 mm copper pad layout, it efficiently transfers heat to the board. Heatsinking is only necessary for applications involving frequent high-duty-cycle surges exceeding 0.05% repetition rate or ambient temperatures above 100°C.
How does the bidirectional construction of MPLAD36KP350CA affect circuit layout?
The bidirectional construction of MPLAD36KP350CA eliminates polarity constraints during PCB placement - the device functions identically regardless of orientation. Unlike unidirectional TVS diodes, no cathode/anode alignment is needed, simplifying layout and reducing assembly errors. This symmetry also enables protection of AC-coupled signals or floating DC buses where voltage polarity reversal is possible, such as in CAN bus interfaces or isolated sensor inputs.
What is the maximum steady-state power dissipation rating for MPLAD36KP350CA?
The MPLAD36KP350CA has a steady-state power dissipation (PD) rating of 2.5 W at 25°C ambient and 71 W at 100°C case temperature. These values reflect continuous DC power handling capability - not surge-related energy. In normal operation, standby current is ≤10 μA at 350 V, resulting in negligible steady-state dissipation (<3.5 mW). The high PD rating at elevated case temperature supports reliable operation in thermally demanding environments like engine compartments or enclosed power cabinets.
MPLAD36KP350CA 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):
- 350V
- Voltage - Breakdown (Min):
- 389V
- Voltage - Clamping (Max) @ Ipp:
- 564V
- Current - Peak Pulse (10/1000µs):
- 64A
- Power - Peak Pulse:
- 36000W (36kW)
- 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
MPLAD36KP350CA FAQ
1.How can I place an order for MPLAD36KP350CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP350CA 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 MPLAD36KP350CA reliable?
The price and inventory of MPLAD36KP350CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP350CA is usually 5 days.
3.What payment methods are accepted for MPLAD36KP350CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP350CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP350CA?
MPLAD36KP350CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP350CA 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 MPLAD36KP350CA?
For technical support, including MPLAD36KP350CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP350CA requirements.
6.How does Aetrix verify that MPLAD36KP350CA is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP350CA 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 MPLAD36KP350CA meets industry standards.
7.What is the process for return or replacement of MPLAD36KP350CA?
All MPLAD36KP350CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP350CA, 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 MPLAD36KP350CA part is unused and in its original packaging.
Return procedure for MPLAD36KP350CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP350CA Tags
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