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Microchip Technology MPLAD36KP78AE3/TR
- Part No.:
- MPLAD36KP78AE3/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP78AE3/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:9,467
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Product details
Overview
MPLAD36KP78AE3/TR from Microchip Technology (formerly Microsemi) is a unidirectional surface-mount transient voltage suppressor (TVS) rated for 36,000 W peak pulse power at 10/1000 μs, with 78 V working standoff voltage (VWM), 86.7–95.8 V breakdown voltage (VBR), and 126 V clamping voltage (VC) at 286 A peak impulse current - designed for lightning and load dump protection in aerospace avionics meeting RTCA DO-160 Section 22.
For engineers reviewing the MPLAD36KP78AE3/TR datasheet, MPLAD36KP78AE3/TR pinout, MPLAD36KP78AE3/TR application, or MPLAD36KP78AE3/TR equivalent, this part delivers verified multi-stroke lightning suppression, AEC-Q101 qualification, RoHS-compliant matte-tin plating, and low thermal resistance (RθJC = 1.0 °C/W) in a PLAD package optimized for high-power transient energy dissipation on FR4 PCBs.
Technical Context
This TVS diode operates in avalanche breakdown mode to clamp transients above its VWM threshold, achieving sub-100 ps response time in unidirectional configuration. Its metal-base cathode construction enables direct thermal coupling to heatsinks or copper pads, supporting steady-state power dissipation up to 504 W at 100 °C case temperature.
It meets IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances) for Class 1–5 secondary lightning protection and RTCA/DO-160G Waveform 4 (6.4/69 μs) Level 4–5 pin injection immunity - validated across –55 °C to +150 °C junction temperature range with full lot traceability and surge testing per unit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 78 V - Maximum continuous DC or repetitive peak reverse voltage before conduction begins; sets minimum system operating margin. |
| VBR @ IBR=5 mA | 86.7–95.8 V - Breakdown onset range; ensures reliable turn-on without premature leakage under nominal bias. |
| VC @ IPP=286 A | 126 V - Clamped voltage during 10/1000 μs surge; defines maximum stress imposed on downstream circuitry. |
| IPP max | 286 A - Peak non-repetitive surge current capability; determines survivability against defined lightning waveforms. |
| RθJC | 1.0 °C/W - Junction-to-case thermal resistance; enables high-power pulse handling with minimal ΔT rise when mounted on heatsink. |
| TJ range | –55 °C to +150 °C - Full operational junction temperature span; supports deployment in engine bay, avionics bays, and industrial control enclosures. |
| αV(BR) | 95 mV/°C - Temperature coefficient of breakdown voltage; allows accurate derating calculations over temperature extremes. |
Pinout & Package
The MPLAD36KP78AE3/TR uses the PLAD surface-mount package: a void-free UL94V-0 epoxy body with exposed metal cathode base (pin 1) and anode terminal on top surface. Total weight is ~1.8 g. Mounting requires recommended pad layout per Figure 7 (datasheet p.10) for optimal thermal performance and solder joint reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Metal Base) | Reverse-biased terminal | Primary heat path to PCB copper or heatsink; must be connected to system ground or low-impedance return plane. |
| Anode (Top Surface Pad) | Forward-biased terminal | Connected to protected line (e.g., 28 V aircraft bus); forms series path for transient current diversion to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW peak pulse rating | Validated at 10/1000 μs waveform - enables single-device compliance with RTCA DO-160 Section 22 multi-stroke lightning test requirements. |
| AEC-Q101 qualification | Qualified for automotive powertrain and chassis applications - confirms robustness under thermal cycling, humidity, and mechanical shock. |
| RoHS-compliant matte-tin plating | e3 suffix indicates lead-free termination compatible with standard reflow profiles (TSP = 260 °C for 10 s) and IPC/JEDEC J-STD-020D.1 Level 1 moisture sensitivity. |
| Low RθJC = 1.0 °C/W | Enables >500 W steady-state power handling at TC = 100 °C - reduces need for oversized heatsinks in compact avionics modules. |
| Full lot traceability | Wafer fabrication and assembly batch tracking supports AS9100-compliant BOM management and failure analysis in safety-critical systems. |
Applications
| Aerospace Avionics Bus Protection | Automotive 24 V Load Dump Suppression |
|---|---|
Use Scenario: Protecting ARINC 429 data lines and 28 V DC power inputs in flight control computers against DO-160G Section 22 lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between protected line and chassis ground to clamp transients within 100 ps. Use Value: Maintains signal integrity by limiting clamped voltage to 126 V while absorbing 36 kW pulses - preventing latch-up or burnout in downstream FPGAs and ADCs. |
Use Scenario: Safeguarding engine control unit (ECU) power inputs during alternator load dump events per ISO 7637-2 Pulse 5a (120 V, 400 ms). IC Role / Device Role / Timing Role: Primary transient suppressor on main 24 V supply rail, positioned upstream of DC/DC converters and microcontrollers. Use Value: Withstands 286 A peak current and clamps to ≤126 V, ensuring downstream regulators remain within absolute maximum ratings during 100 ms surges. |
| Industrial Motor Drive DC Link Protection | Railway Signaling Power Interface |
Use Scenario: Shielding IGBT gate drivers and current sensors on 400 V DC link rails from switching-induced voltage spikes in variable-frequency drives. IC Role / Device Role / Timing Role: Fast-response unidirectional TVS connected between DC+ and ground to absorb commutation energy. Use Value: Sub-100 ps response and 1.0 °C/W thermal resistance allow repeated 36 kW pulse absorption without thermal runaway - extending drive uptime. |
Use Scenario: Securing 110 V DC signaling interfaces in European railway interlocking systems against EFT bursts and induced surges per EN 50121-3-2. IC Role / Device Role / Timing Role: Secondary protection device installed at cabinet entry point to shunt fast transients before they reach PLC I/O modules. Use Value: 126 V clamping voltage and 286 A IPP ensure compliance with Class 4 immunity requirements while maintaining <10 µA leakage at 78 V nominal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ78A | Lower 600 W peak power rating (vs. 36,000 W); SMB package with RθJC ≈ 35 °C/W. | Limited to single-stroke surges; unsuitable for DO-160 multi-stroke or automotive load dump. | Select only for low-energy ESD/EFT protection where space constraints preclude PLAD footprint. |
| SMCJ78A | 3,000 W peak power (1/12th of MPLAD36KP78AE3/TR); SMC package; higher VC = 135 V at same IPP. | Meets IEC 61000-4-5 Class 3 but fails Class 4/5; not qualified to AEC-Q101 or DO-160. | Use where cost sensitivity outweighs multi-stroke reliability requirements and thermal performance is secondary. |
Compared with SMBJ78A and SMCJ78A, the MPLAD36KP78AE3/TR delivers 12× and 12× higher peak power handling respectively, lower clamping voltage under identical surge conditions, and certified qualification for aerospace and automotive safety-critical use - making it the only option for sustained multi-pulse environments.
Availability
MPLAD36KP78AE3/TR is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain systems, and industrial motor drives requiring stable component supply with full traceability, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for MPLAD36KP78AE3/TR 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
Microchip Technology acquired Microsemi in 2018 and now offers its high-reliability discrete portfolio including radiation-tolerant, aerospace-grade, and automotive-qualified components.
The MPLAD36KP78AE3/TR belongs to Microchip's PLAD-series high-power TVS family, engineered specifically for mission-critical transient suppression in aviation, defense, and heavy-duty automotive systems where multi-stroke surge resilience is non-negotiable.
FAQ
What is the clamping voltage of MPLAD36KP78AE3/TR at its rated peak pulse current?
The MPLAD36KP78AE3/TR has a maximum clamping voltage (VC) of 126 V when subjected to its rated peak impulse current of 286 A under the 10/1000 μs waveform. This value is measured per standard test conditions in the datasheet and defines the upper voltage limit imposed on protected circuits during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is MPLAD36KP78AE3/TR qualified for automotive applications?
Yes, the MPLAD36KP78AE3/TR is AEC-Q101 qualified, confirming its suitability for automotive powertrain and chassis applications. It undergoes stress testing for temperature cycling, humidity, mechanical shock, and high-current surge - validating reliability in under-hood environments where 24 V load dump transients occur. Its 78 V VWM aligns with 24 V system nominal voltages after derating.
Does MPLAD36KP78AE3/TR meet RTCA DO-160 lightning protection requirements?
Yes, the MPLAD36KP78AE3/TR is explicitly validated for RTCA DO-160G Section 22 multi-stroke lightning testing, including Waveform 4 (6.4/69 μs) Level 4 and 5. Its 36,000 W peak power rating, low RθJC, and fast response (<100 ps) enable repeated surge absorption without degradation - a key requirement for aircraft-level certification.
What is the thermal resistance specification for MPLAD36KP78AE3/TR?
The MPLAD36KP78AE3/TR has a junction-to-case thermal resistance (RθJC) of 1.0 °C/W, measured with the metal cathode base directly coupled to a heatsink or large copper pour. This low value enables efficient heat transfer during high-energy transients and supports up to 504 W steady-state power dissipation at 100 °C case temperature - essential for compact, high-density PCB layouts.
How does the e3/TR suffix affect MPLAD36KP78AE3/TR packaging and compliance?
"e3" denotes RoHS-compliant matte-tin plating per JEDEC standards, and "TR" indicates tape-and-reel packaging per EIA-481-B. The e3/TR combination ensures compatibility with lead-free reflow processes (260 °C for 10 s), IPC/JEDEC J-STD-020D.1 Level 1 moisture sensitivity (no dry pack required), and automated SMT placement - simplifying manufacturing for high-reliability electronics producers.
MPLAD36KP78AE3/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 78V
- Voltage - Breakdown (Min):
- 86.7V
- Voltage - Clamping (Max) @ Ipp:
- 126V
- Current - Peak Pulse (10/1000µs):
- 286A
- Power - Peak Pulse:
- 36000W (36kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PLAD
MPLAD36KP78AE3/TR FAQ
1.How can I place an order for MPLAD36KP78AE3/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP78AE3/TR 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 MPLAD36KP78AE3/TR reliable?
The price and inventory of MPLAD36KP78AE3/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP78AE3/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP78AE3/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP78AE3/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP78AE3/TR?
MPLAD36KP78AE3/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP78AE3/TR 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 MPLAD36KP78AE3/TR?
For technical support, including MPLAD36KP78AE3/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP78AE3/TR requirements.
6.How does Aetrix verify that MPLAD36KP78AE3/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP78AE3/TR 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 MPLAD36KP78AE3/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP78AE3/TR?
All MPLAD36KP78AE3/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP78AE3/TR, 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 MPLAD36KP78AE3/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP78AE3/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP78AE3/TR Tags
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