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Microchip Technology MPLAD36KP40A
- Part No.:
- MPLAD36KP40A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP40A.pdf
- Description:
- TVS DIODE 40VWM 64.5VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,234
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Product details
Overview
MPLAD36KP40A 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 36 kW peak pulse power at 10/1000 μs, features a 40 V reverse standoff voltage (VWM), clamps to ≤64.5 V at 559 A peak pulse current (IPP), and operates across –55°C to +150°C junction temperature range - deployed in lightning-prone avionics power rails and load-dump-protected vehicle ECUs.
For engineers reviewing the MPLAD36KP40A datasheet, MPLAD36KP40A pinout, MPLAD36KP40A application, or MPLAD36KP40A equivalent, this page provides verified electrical specs, IEC 61000-4-5 and RTCA DO-160F waveform compliance data, thermal resistance (RθJC = 1.0°C/W), polarity marking convention, and direct alternatives meeting secondary lightning protection Class 4/5 requirements with 42 Ω source impedance.
Technical Context
This TVS diode uses silicon avalanche technology to clamp transients by entering breakdown when voltage exceeds V(BR) = 44.4–49.1 V at 5 mA test current. Its low RθJC of 1.0°C/W enables effective heat transfer to PCB copper pads or heatsinks, supporting repetitive surge handling under ≤0.05% duty factor per Figure 2.
It meets RTCA DO-160F Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 up to 78 V standoff variants - for MPLAD36KP40A, this translates to validated pin-injection immunity at 40 V system level with derated performance above 25°C per MicroNote 132.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains single-stroke lightning surges without failure per IEC 61000-4-5. |
| Reverse Standoff Voltage (VWM) | 40 V - maximum continuous DC or peak AC voltage applied without triggering conduction. |
| Breakdown Voltage (V(BR)) | 44.4–49.1 V @ 5 mA - defines onset of avalanche clamping; ensures margin above 40 V operating rail. |
| Max Clamping Voltage (VC) | 64.5 V @ IPP = 559 A - limits downstream IC stress during worst-case surge event. |
| Junction-to-Case Thermal Resistance | 1.0°C/W - enables >70 W steady-state dissipation when mounted on 100°C heatsink per PD rating. |
| Standby Current (ID) | 10 μA @ 40 V - negligible leakage in standby, critical for battery-backed or low-power monitoring circuits. |
| Operating Temperature Range | –55°C to +150°C - qualified for engine bay, avionics bays, and industrial control enclosures. |
Pinout & Package
Package: PLAD (Plastic Leaded Anode Down) - void-free UL94V-0 epoxy body with metal base cathode termination; dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H); weight ≈ 1.7–2.0 g. Cathode is the exposed 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; polarity marked on body for unidirectional versions. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMT construction | Height ≤ 5.33 mm enables placement under shields or in space-constrained avionics modules. |
| Moisture Sensitivity Level 1 | No dry-pack or baking required before reflow - reduces manufacturing overhead and avoids moisture-induced popcorning. |
| AEC-Q101 qualified | Validated for automotive power electronics including alternator output, battery management, and ADAS ECU inputs. |
| RTCA DO-160F Waveform 4/5A compliance | Enables use in aircraft lighting, flight control, and communication subsystems requiring Level 4 immunity at 40 V rails. |
| RoHS-compliant (e3) | Tin-plated terminals meet JEDEC J-STD-020B solderability standards and environmental compliance mandates. |
Applications
| Aerospace Power Distribution | Automotive Load-Dump Protection |
|---|---|
Use Scenario: 28 V DC distribution bus in commercial aircraft cabin systems exposed to lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary clamping device placed at bus entry point to limit voltage excursion to <65 V during multi-stroke events. Use Value: Enables compliance with RTCA DO-160F Waveform 4 Level 4 and secondary lightning Class 4/5 (42 Ω source). |
Use Scenario: 12 V/24 V alternator output line in heavy-duty truck ECUs subjected to ISO 7637-2 Pulse 5a load-dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS absorbing up to 36 kW energy while maintaining <65 V clamping to protect downstream CAN transceivers and microcontrollers. Use Value: Eliminates need for series resistors or additional filtering due to sub-100 ps response time and low dynamic impedance. |
| Industrial Motor Drive Inputs | Railway Signaling Interfaces |
Use Scenario: DC link input of 3-phase motor drives in factory automation subject to switching transients and induced RFI per IEC 61000-4-4. IC Role / Device Role / Timing Role: Front-end transient suppression before rectifier and bulk capacitor, rated for 559 A peak impulse current. Use Value: Maintains system uptime by preventing gate driver latch-up or MCU reset caused by 4 kV EFT bursts. |
Use Scenario: 72 V signaling interface in European railway signaling cabinets exposed to indirect lightning coupling per EN 50121-4. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), clamping residual surges to safe levels for optocoupler inputs. Use Value: Achieves IEC 61000-4-5 Class 4 compliance with 42 Ω source impedance and supports long-distance cable runs. |
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 SP3050-040 | Lower PPP (3 kW), smaller SMC package, VWM = 40 V, VC = 77 V @ 30 A - not suitable for DO-160F Level 4. | Targeted at consumer-grade Ethernet ports and USB power lines, not aerospace or automotive primary protection. | Select only for cost-sensitive, non-safety-critical 40 V rail protection where 36 kW surge capacity is unnecessary. |
| Vishay SMAJ40A | Same VWM (40 V) and unidirectional polarity, but PPP = 400 W, VC = 64.5 V @ 3.1 A - 1/90th the energy handling of MPLAD36KP40A. | Used in board-level ESD protection for microcontroller I/O, not system-level lightning or load-dump defense. | Choose only for secondary protection stages or low-energy signal lines; cannot replace MPLAD36KP40A in primary surge paths. |
Compared with SP3050-040 and SMAJ40A, the MPLAD36KP40A delivers 90× higher peak pulse power and validated DO-160F/IEC 61000-4-5 compliance - making it irreplaceable in primary protection roles for aviation, automotive, and rail infrastructure where multi-kA surge currents must be safely diverted without degradation.
Availability
MPLAD36KP40A is available at Aetrix Electronics and suitable for aerospace power distribution, automotive load-dump protection, and industrial motor drive inputs requiring stable component supply across extended product lifecycles and high-reliability screening options.
Supply support for MPLAD36KP40A 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 MPLAD36KP40A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for DO-160F and IEC 61000-4-5 compliant primary surge protection in harsh-environment electronic systems.
FAQ
What is the clamping voltage of MPLAD36KP40A at its rated peak pulse current?
The MPLAD36KP40A exhibits a maximum clamping voltage (VC) of 64.5 V when subjected to its rated peak pulse current (IPP) of 559 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in RF01216 Rev B and ensures downstream circuitry remains within safe operating voltage limits during high-energy transients.
Is MPLAD36KP40A RoHS compliant and what plating does it use?
Yes, MPLAD36KP40A is RoHS compliant (designated by "e3" suffix in nomenclature) and features annealed matte-tin plating on terminals, fully compliant with MIL-STD-750 Method 2026 for solderability. The device requires no dry-pack handling per IPC/JEDEC J-STD-020B Level 1 moisture sensitivity classification.
How is polarity identified on the MPLAD36KP40A package?
For the unidirectional MPLAD36KP40A, polarity is marked on the top surface with a cathode band or symbol; the cathode is the exposed metal base (bottom side), which must be connected to ground or the lowest potential node in the protected circuit. This configuration ensures proper avalanche conduction during overvoltage events.
Does MPLAD36KP40A meet AEC-Q101 qualification requirements?
Yes, MPLAD36KP40A is tested and qualified to AEC-Q101 standards for discrete semiconductors, confirming its suitability for automotive power electronics applications including engine control units, battery management systems, and ADAS sensor interfaces subjected to temperature cycling, mechanical shock, and humidity exposure.
What thermal management is required for sustained operation of MPLAD36KP40A?
MPLAD36KP40A has a junction-to-case thermal resistance (RθJC) of 1.0°C/W and requires direct thermal coupling of its metal base to a minimum 10 cm² copper pad or external heatsink. At 100°C case temperature, it supports up to 71 W steady-state dissipation - critical for applications with repetitive surge duty cycles or elevated ambient temperatures.
MPLAD36KP40A 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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 559A
- 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
MPLAD36KP40A FAQ
1.How can I place an order for MPLAD36KP40A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP40A 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 MPLAD36KP40A reliable?
The price and inventory of MPLAD36KP40A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP40A is usually 5 days.
3.What payment methods are accepted for MPLAD36KP40A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP40A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP40A?
MPLAD36KP40A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP40A 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 MPLAD36KP40A?
For technical support, including MPLAD36KP40A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP40A requirements.
6.How does Aetrix verify that MPLAD36KP40A is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP40A 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 MPLAD36KP40A meets industry standards.
7.What is the process for return or replacement of MPLAD36KP40A?
All MPLAD36KP40A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP40A, 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 MPLAD36KP40A part is unused and in its original packaging.
Return procedure for MPLAD36KP40A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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