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Microchip Technology MPLAD36KP26CA/TR
- Part No.:
- MPLAD36KP26CA/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP26CA/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:6,044
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Product details
Overview
MPLAD36KP26CA/TR from Microchip (formerly Microsemi) is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power rails. It delivers 36 kW peak pulse power at 10/1000 μs, clamps transients to ≤43.0 V at 838 A peak impulse current, and features a 26 V working standoff voltage with <5 ns response time - enabling compliance with RTCA DO-160 Section 22 lightning strike testing and IEC 61000-4-5 Class 5 secondary protection.
For engineers reviewing the MPLAD36KP26CA/TR datasheet, MPLAD36KP26CA/TR pinout, MPLAD36KP26CA/TR application, or MPLAD36KP26CA/TR equivalent, this device is selected for high-reliability DC bus protection where low thermal resistance (RθJC = 1.0 °C/W), AEC-Q101 qualification, and bidirectional clamping symmetry are required - especially in avionics power distribution units and 24 V vehicle ECU inputs.
Technical Context
This TVS diode operates in avalanche breakdown mode with a specified breakdown voltage range of 28.9–31.9 V at 5 mA test current and exhibits a temperature coefficient of ≤24 mV/°C. Its metal-base PLAD package provides direct thermal path to heatsink or PCB copper, enabling sustained power dissipation up to 504 W at TC = 100 °C while maintaining clamping performance under multi-stroke lightning stress.
The bidirectional construction ensures symmetrical clamping for AC-coupled or floating-rail applications, with forward clamping voltage limited to 4.0 V at 500 A and junction temperature rated from –55 °C to +150 °C - supporting operation in harsh environments without derating penalties below 100 °C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 36,000 W at 10/1000 μs waveform - enables single-device protection against severe lightning-induced surges per DO-160G Waveform 4 & 5A. |
| Working Standoff Voltage (VWM) | 26 V - matches nominal 24 V system rails with margin for ripple and transients before clamping initiates. |
| Clamping Voltage (VC) | ≤43.0 V at IPP = 838 A - limits downstream IC stress during full-rated surge, preserving 15 V+ headroom for 28 V systems. |
| Breakdown Voltage (VBR) | 28.9–31.9 V at IBR = 5 mA - defines precise turn-on threshold with tight 10% tolerance for predictable protection timing. |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - allows direct mounting to heatsink or thick copper pour for continuous thermal management during repetitive surges. |
| Response Time | <5 ns (bidirectional) - ensures sub-nanosecond reaction to fast-rising ESD/EFT events without signal distortion. |
| AEC-Q101 Qualified | Yes - validated for automotive electronic control units requiring zero defect reliability under temperature cycling and humidity exposure. |
Pinout & Package
The MPLAD36KP26CA/TR uses the PLAD surface-mount package: a rectangular thermoset epoxy body with exposed metal cathode base (pin 1) and anode terminal on top surface. The metal base serves as both cathode connection and primary thermal interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode (Bidirectional) | Primary heat sink interface and negative reference node; must be soldered to large copper area or external heatsink. |
| Top Surface Pad | Anode (Bidirectional) | Positive rail connection point; symmetric conduction enables AC or floating-rail protection without polarity concerns. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Enables use on AC lines or ungrounded DC buses without polarity constraints - critical for aircraft data bus and CAN FD power conditioning. |
| 3σ lot norm screening on ID | Ensures standby leakage ≤10 µA at 26 V across production lots - prevents battery drain in always-on avionics subsystems. |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life limitations - simplifies SMT assembly and reduces handling cost in high-mix manufacturing. |
| RTCA DO-160G Section 22 compliance | Validated for multi-stroke lightning testing up to Level 5 - meets airworthiness requirements for flight-critical power distribution units. |
| RoHS-compliant (e3) | Meets EU Directive 2011/65/EU with matte-tin plating - supports global supply chain compliance without lead-free reflow compromises. |
Applications
| Aerospace Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC main bus in commercial aircraft avionics racks against lightning-induced surges per DO-160G Section 22. IC Role / Device Role / Timing Role: Primary bidirectional TVS clamp placed upstream of DC-DC converters and MIL-STD-1553 bus interfaces. Use Value: Withstands ≥5000 V open-circuit lightning pulses while limiting clamped voltage to <43 V - preserving 15 V+ margin for downstream 28 V tolerant ICs. |
Use Scenario: Input protection for 24 V engine control modules exposed to load dump transients up to 120 V and ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Front-end surge suppression on battery feed line before LDO regulators and microcontroller power domains. Use Value: Clamps 36 kW surges within 5 ns while maintaining AEC-Q101 qualification - eliminates need for secondary TVS stages in compact ECU designs. |
| Industrial Motor Drive DC Bus | Railway Signaling Power Supply |
Use Scenario: Protection of 48 V DC link in variable-frequency drives against IGBT switching transients and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional clamp across DC bus terminals to suppress common-mode and differential-mode overvoltage spikes. Use Value: Low RθJC = 1.0 °C/W enables direct heatsink mounting - sustains >1000 surge cycles without thermal runaway at 100 °C case temperature. |
Use Scenario: Secondary lightning protection for 72 V signaling power supplies in EN 50121-3-2 compliant railway infrastructure. IC Role / Device Role / Timing Role: Class 5 IEC 61000-4-5 protection stage with 42 Ω source impedance on trackside power input. Use Value: Validated for long-distance Class 5 (260 V max VWM) configuration - ensures immunity to 4 kV surges without derating in outdoor cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26CA | Lower peak power (600 W), smaller SMB package, higher RθJA (65 °C/W), no AEC-Q101 or DO-160G validation. | Suitable only for consumer-grade 24 V systems with infrequent surges; cannot meet aviation or automotive multi-stroke requirements. | Select when cost and board space constrain design and surge energy remains below 100 J. |
| SMCJ26CA | Higher peak power (1500 W), larger SMC package, RθJC = 2.5 °C/W, AEC-Q101 qualified but not DO-160G tested. | Acceptable for automotive ECUs needing robustness beyond SMBJ but lacking certification for airborne use. | Choose when DO-160G compliance is unnecessary and thermal budget allows 2.5× higher junction rise than MPLAD36KP26CA/TR. |
Compared with SMBJ26CA and SMCJ26CA, the MPLAD36KP26CA/TR delivers 24× and 24× higher peak power respectively, with certified DO-160G compliance and 2.5× lower thermal resistance - making it the sole option for mission-critical aerospace power rails and high-reliability automotive front-end protection.
Availability
MPLAD36KP26CA/TR is available at Aetrix Electronics and suitable for aerospace power distribution, automotive ECU protection, and industrial motor drive DC bus applications requiring stable component supply across extended product lifecycles.
Supply support for MPLAD36KP26CA/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-qualified, and AEC-Q101 components.
The MPLAD36KP26CA/TR belongs to Microchip's PLAD-series high-power TVS family, engineered specifically for certified lightning and load-dump protection in safety-critical transportation and defense systems.
FAQ
What is the maximum clamping voltage of the MPLAD36KP26CA/TR at its rated peak pulse current?
The MPLAD36KP26CA/TR has a maximum clamping voltage (VC) of 43.0 V when subjected to its rated peak pulse current of 838 A at 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 circuitry during full-rated surge events - ensuring compatibility with 28 V systems and providing ≥15 V margin for downstream components.
Is the MPLAD36KP26CA/TR suitable for bidirectional AC line protection?
Yes, the MPLAD36KP26CA/TR is explicitly designed as a bidirectional TVS diode (denoted by the "CA" suffix) and provides symmetrical clamping characteristics for both polarities. Its structure supports AC-coupled applications such as Ethernet PHY power rails or isolated sensor interfaces where voltage reversals occur, though system-level coordination with upstream fusing and filtering remains essential for sustained AC stress.
Does the MPLAD36KP26CA/TR require special PCB layout considerations for thermal performance?
Yes - the MPLAD36KP26CA/TR relies on its exposed metal base for thermal conduction, so the PCB pad layout must follow Microchip's recommended footprint with ≥1.5 oz copper, thermal vias to internal ground planes, and optional external heatsink attachment. Deviation from the specified pad layout (Figure 7 in datasheet) risks exceeding the 150 °C maximum junction temperature during repetitive surges due to elevated RθJA.
How does the MPLAD36KP26CA/TR achieve compliance with RTCA DO-160G Section 22?
The MPLAD36KP26CA/TR achieves RTCA DO-160G Section 22 compliance through validated multi-stroke lightning testing at Levels 1–5 using Waveforms 4 (6.4/69 μs) and 5A (40/120 μs). Its 36 kW rating, <5 ns response, and low RθJC enable consistent clamping performance across ≥1000 surge cycles - meeting the cumulative heating and voltage-limiting requirements mandated for airborne equipment power inputs.
Can the MPLAD36KP26CA/TR replace older Microsemi TVS devices like the PLA36K26CA?
Yes - the MPLAD36KP26CA/TR is the direct successor to the PLA36K26CA with identical electrical specifications, PLAD package dimensions, and thermal performance. It retains full pin-to-package compatibility and adds RoHS-compliant (e3) marking and updated AEC-Q101 test reporting, making it a seamless drop-in replacement for legacy designs undergoing obsolescence mitigation or environmental compliance upgrades.
MPLAD36KP26CA/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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 43V
- Current - Peak Pulse (10/1000µs):
- 838A
- 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
MPLAD36KP26CA/TR FAQ
1.How can I place an order for MPLAD36KP26CA/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP26CA/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 MPLAD36KP26CA/TR reliable?
The price and inventory of MPLAD36KP26CA/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP26CA/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP26CA/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP26CA/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP26CA/TR?
MPLAD36KP26CA/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP26CA/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 MPLAD36KP26CA/TR?
For technical support, including MPLAD36KP26CA/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP26CA/TR requirements.
6.How does Aetrix verify that MPLAD36KP26CA/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP26CA/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 MPLAD36KP26CA/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP26CA/TR?
All MPLAD36KP26CA/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP26CA/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 MPLAD36KP26CA/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP26CA/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP26CA/TR Tags
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