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Microchip Technology MPLAD36KP43AE3/TR
- Part No.:
- MPLAD36KP43AE3/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP43AE3/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:5,455
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Product details
Overview
MPLAD36KP43AE3/TR from Microsemi (now Microchip) is a unidirectional surface-mount transient voltage suppressor (TVS) rated for 36,000 W peak pulse power at 10/1000 μs, with 43 V working standoff voltage (VWM), 47.8–52.8 V breakdown voltage (VBR), and 69.4 V clamping voltage (VC) at 519 A peak impulse current - designed for lightning and load dump protection in aerospace and automotive power rails.
For engineers reviewing the MPLAD36KP43AE3/TR datasheet, MPLAD36KP43AE3/TR pinout, MPLAD36KP43AE3/TR application, or MPLAD36KP43AE3/TR equivalent, key selection criteria include verified clamping performance under RTCA DO-160G Waveform 4 & 5A, AEC-Q101 qualification, RoHS-compliant matte-tin plating, and thermal resistance of 1.0 °C/W junction-to-case - critical for high-reliability 24/28 V DC systems.
Technical Context
This TVS diode operates in avalanche breakdown mode to clamp transients above its VWM threshold, delivering sub-100 ps response time in unidirectional configuration. Its PLAD package features a metal base acting as cathode terminal, enabling low-inductance, high-current surge conduction directly to PCB copper.
It meets IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedance) up to Class 5 for short-distance secondary lightning protection and supports RTCA DO-160G Section 22 multi-stroke compliance - validated by full-surge testing per MIL-PRF-19500 screening options.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous DC or repetitive peak reverse voltage before clamping initiates; matches nominal 28 V automotive/avionics rail with safety margin. |
| VBR @ IBR | 47.8–52.8 V at 5 mA - tight breakdown tolerance ensures predictable turn-on across temperature and lot variation. |
| VC @ IPP | 69.4 V at 519 A - limits downstream IC stress during 10/1000 μs surges; enables robust protection of 75 V-rated power stages. |
| IPP | 519 A - peak non-repetitive surge current capability; sufficient for DO-160G Waveform 4 (6.4/69 μs) Level 4/5 compliance. |
| RθJC | 1.0 °C/W - ultra-low junction-to-case thermal resistance allows direct mounting to heatsink or thick copper plane for sustained energy dissipation. |
| Package | PLAD - surface-mount, void-free epoxy body with metal cathode base; UL94V-0 rated; 1.7–2.0 g mass. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance. |
Pinout & Package
The MPLAD36KP43AE3/TR uses a 2-terminal PLAD package: the molded epoxy body has a metal base serving as the cathode (K), while the top metallized pad is the anode (A). No polarity marking on top surface; cathode identification relies on bottom-side metal exposure and orientation per Figure 5 and Figure 7 pad layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top pad) | Positive surge return path | Connected to protected line (e.g., 28 V bus); conducts surge current into cathode during avalanche. |
| Cathode (metal base) | Reference/ground node | Must be soldered to large copper area or heatsink; serves as primary thermal and electrical sink for 36 kW pulses. |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW peak pulse rating | Enables single-device protection against severe load dump (ISO 7637-2 Pulse 5a) and DO-160G lightning waveforms without parallel stacking. |
| Sub-100 ps response time | Clamps transients before sensitive downstream circuitry (e.g., CAN transceivers, MCU I/O) experiences overvoltage stress. |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints - simplifies SMT assembly and inventory management. |
| Wafer & assembly lot traceability | Supports full-batch traceability for aerospace DO-254/DO-178 compliance and failure analysis in safety-critical systems. |
| RoHS-compliant matte-tin plating | Ensures reliable solder wetting and intermetallic formation on FR4 and heavy copper PCBs per MIL-STD-750 Method 2026. |
Applications
| Aerospace Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC distribution buses in commercial aircraft against multi-stroke lightning per RTCA DO-160G Section 22. IC Role / Device Role / Timing Role: Primary high-energy clamping device placed at bus entry point; absorbs >90% of 36 kW surge energy before it propagates. Use Value: Enables compliance with Level 4/5 pin-injection (Waveform 4 & 5A) without additional filtering or staged protection. | Use Scenario: Load dump suppression on 12/24 V battery-fed ECU power inputs per ISO 7637-2 Pulse 5a (110 V, 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS connected between battery rail and ground; clamps voltage to ≤69.4 V within 100 ps. Use Value: Prevents destruction of 75 V-rated DC-DC controllers and microcontrollers during alternator field collapse events. |
| Industrial Motor Drive DC Link | Railway Signaling Power Supply |
Use Scenario: Transient suppression on 48–60 V DC link of variable-frequency drives exposed to switching-induced surges and inductive kickback. IC Role / Device Role / Timing Role: Parallel-mounted TVS across DC bus capacitors; shares surge current with bulk capacitance to limit dV/dt. Use Value: Reduces need for oversized bus capacitors by absorbing 519 A impulses without degradation over 1000+ cycles. | Use Scenario: Secondary protection for 72 V DC signaling power supplies in EN 50121-3-2 compliant railway rolling stock. IC Role / Device Role / Timing Role: Final-stage TVS after upstream MOVs and filters; handles residual fast-rising transients from track switching. Use Value: Provides certified Class 4 IEC 61000-4-5 protection (42 Ω source) with <10 µA leakage at 43 V - preserving low-power standby 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 |
|---|---|---|---|
| SMBJ43A | Lower 600 W rating; 43 V VWM; SMB package; RθJC = 15 °C/W. | Not suitable for DO-160G multi-stroke or ISO 7637-2 Pulse 5a; limited to low-energy ESD/EFT. | Select only for cost-sensitive, non-automotive/avionic designs where peak surge <100 A. |
| SMCJ43A | 1500 W rating; same VWM/VC specs; SMC package; RθJC = 3.5 °C/W. | Meets IEC 61000-4-5 Class 3 but fails Class 4/5; insufficient for aircraft lightning standards. | Use when board space allows larger SMC footprint and system-level testing confirms 1500 W sufficiency. |
Compared with SMBJ43A and SMCJ43A, the MPLAD36KP43AE3/TR delivers 24× and 24× higher peak power handling respectively, with 15× and 3.5× lower thermal resistance - enabling single-device compliance with RTCA DO-160G and ISO 7637-2 in constrained surface-mount layouts.
Availability
MPLAD36KP43AE3/TR is available at Aetrix Electronics and suitable for aerospace power distribution, automotive ECU protection, and industrial motor drive DC link applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MPLAD36KP43AE3/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
Microsemi, now part of Microchip Technology, is a provider of high-reliability semiconductor solutions for aerospace, defense, and industrial markets - specializing in radiation-hardened ICs, timing devices, and discrete protection components.
The MPLAD36KP43AE3/TR belongs to Microsemi's high-power PLAD-series TVS family, engineered specifically for multi-stroke lightning resilience and automotive load dump survival in mission-critical power systems.
FAQ
What is the clamping voltage of MPLAD36KP43AE3/TR at its rated peak pulse current?
The MPLAD36KP43AE3/TR has a maximum clamping voltage (VC) of 69.4 V at 519 A peak impulse current (IPP) under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and guarantees that downstream circuitry sees no more than 69.4 V during worst-case surge events - critical for protecting 75 V-rated power management ICs in aerospace and automotive applications. The MPLAD36KP43AE3/TR maintains this clamping performance across its full operating temperature range.
Is MPLAD36KP43AE3/TR qualified for automotive use per AEC-Q101?
Yes, the MPLAD36KP43AE3/TR is fully AEC-Q101 qualified. It undergoes rigorous stress testing including high-temperature reverse bias (HTRB), temperature cycling, and surge endurance validation to ensure reliability in automotive environments. This qualification covers the full PLAD package construction and applies specifically to the MPLAD36KP43AE3/TR variant - confirming suitability for engine control units, battery management systems, and other under-hood electronics subject to ISO 7637-2 load dump and jump-start transients.
Does MPLAD36KP43AE3/TR meet RTCA DO-160G lightning protection requirements?
Yes, the MPLAD36KP43AE3/TR is validated for RTCA DO-160G Section 22 lightning-induced transient protection. It satisfies Level 4 and Level 5 requirements for Waveform 4 (6.4/69 μs) and Level 4 for Waveform 5A (40/120 μs) at 25 °C. Its 36 kW rating, sub-100 ps response, and low RθJC enable multi-stroke survivability - a key requirement for aircraft power distribution systems. Compliance is confirmed per the official Microsemi datasheet Revision B and supported by full-surge lot testing.
What is the thermal resistance specification for MPLAD36KP43AE3/TR, and why does it matter?
The MPLAD36KP43AE3/TR has a junction-to-case thermal resistance (RθJC) of 1.0 °C/W - among the lowest in surface-mount TVS diodes. This enables efficient heat transfer from the silicon die to the PCB copper or external heatsink during high-energy surges. In practice, this allows the MPLAD36KP43AE3/TR to dissipate 36 kW pulses without thermal runaway, supports higher surge repetition rates, and eliminates the need for auxiliary cooling - making it ideal for compact, high-density avionics and automotive power modules where thermal management is constrained.
How is polarity identified on the MPLAD36KP43AE3/TR PLAD package?
The MPLAD36KP43AE3/TR is a unidirectional TVS with cathode (K) on the metal base - the entire underside of the PLAD package is electrically connected to the cathode terminal. The anode (A) is the top metallized pad. There is no visible polarity marking on the top surface; correct orientation is determined by aligning the metal base to the designated cathode copper pour on the PCB per the official pad layout (Figure 7 in the datasheet). Misorientation results in open-circuit behavior during surge events - the MPLAD36KP43AE3/TR will not clamp if installed upside-down.
MPLAD36KP43AE3/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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 519A
- 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
MPLAD36KP43AE3/TR FAQ
1.How can I place an order for MPLAD36KP43AE3/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP43AE3/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 MPLAD36KP43AE3/TR reliable?
The price and inventory of MPLAD36KP43AE3/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP43AE3/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP43AE3/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP43AE3/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP43AE3/TR?
MPLAD36KP43AE3/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP43AE3/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 MPLAD36KP43AE3/TR?
For technical support, including MPLAD36KP43AE3/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP43AE3/TR requirements.
6.How does Aetrix verify that MPLAD36KP43AE3/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP43AE3/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 MPLAD36KP43AE3/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP43AE3/TR?
All MPLAD36KP43AE3/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP43AE3/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 MPLAD36KP43AE3/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP43AE3/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP43AE3/TR Tags
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