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Microchip Technology MPLAD36KP85CA/TR
- Part No.:
- MPLAD36KP85CA/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP85CA/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:5,484
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Product details
Overview
MPLAD36KP85CA/TR from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) rated for 36,000 W peak pulse power at 10/1000 μs, with 85 V working standoff voltage (VWM), 94.4–104.0 V breakdown voltage (VBR), and 137 V clamping voltage (VC) at 263 A peak impulse current - designed for secondary lightning protection in avionics per RTCA DO-160G Waveform 4 and IEC 61000-4-5.
For engineers reviewing the MPLAD36KP85CA/TR datasheet, MPLAD36KP85CA/TR pinout, MPLAD36KP85CA/TR application, or MPLAD36KP85CA/TR equivalent, this part supports high-reliability aerospace and automotive load dump protection where low thermal resistance (RθJC = 1.0 °C/W), bidirectional surge suppression, and AEC-Q101 qualification are required.
Technical Context
This TVS diode operates in avalanche breakdown mode to clamp transient overvoltages across protected lines. Its bidirectional construction enables symmetrical clamping for AC-coupled or floating signal paths, and its PLAD package features a metal base acting as the cathode terminal for efficient heat sinking.
It delivers 36 kW surge capability under standardized 10/1000 μs waveform conditions, with sub-5 ns response time and <10 µA standby leakage at 85 V. Thermal design is enabled by RθJC = 1.0 °C/W and RθJA = 50 °C/W on FR4 with recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 36,000 W at 10/1000 μs - sustains multi-stroke lightning surges without degradation |
| Working Standoff Voltage (VWM) | 85 V - maximum continuous DC or peak reverse voltage before conduction begins |
| Breakdown Voltage (VBR) | 94.4–104.0 V at 5 mA - defines onset of avalanche clamping behavior |
| Clamping Voltage (VC) | 137 V at 263 A - maximum voltage seen by protected circuit during worst-case surge |
| Peak Pulse Current (IPP) | 263 A at 10/1000 μs - quantifies surge current-handling capacity under standard test condition |
| Thermal Resistance (Junction-to-Case) | 1.0 °C/W - enables direct mounting to heatsink for sustained power dissipation |
| Temperature Range | –55 °C to +150 °C - supports operation in extended industrial and aerospace environments |
Pinout & Package
The MPLAD36KP85CA/TR uses the PLAD surface-mount package: void-free thermosetting epoxy body (UL94V-0), metal base acting as cathode terminal, matte-tin-plated terminals, and polarity marked via cathode location on bottom surface. Weight: ~1.7–2.0 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom Surface) | Cathode (Bidirectional) | Serves as common reference terminal for both polarities; primary thermal path to PCB/heatsink |
| Top Surface Terminal | Anode (Bidirectional) | Connects to line being protected; forms symmetrical clamping path with cathode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Surge Suppression | Enables AC-line and floating-bus protection without polarity sensitivity - critical for aircraft data buses and sensor interfaces |
| AEC-Q101 Qualification | Validates reliability for automotive powertrain and chassis systems subject to temperature cycling and mechanical shock |
| RTCA DO-160G Compliance (Waveform 4 & 5A) | Meets Level 4/5 pin-injection immunity requirements for avionics - verified up to 300CA variant |
| Low Thermal Resistance (RθJC = 1.0 °C/W) | Allows >500 W steady-state dissipation when mounted to heatsink - supports hybrid transient + DC fault protection |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to reflow - reduces manufacturing cost and handling risk |
Applications
| Aircraft Data Bus Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: Protecting ARINC 429 or MIL-STD-1553B transceivers from induced transients during lightning strike events. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential bus lines to clamp common-mode surges while preserving signal integrity. Use Value: Meets RTCA DO-160G Section 22 multi-stroke lightning standard with <5 ns response and 137 V clamping at 263 A. |
Use Scenario: Safeguarding engine control unit (ECU) power inputs against 12 V system load dump spikes up to 120 V. IC Role / Device Role / Timing Role: Primary overvoltage clamp on battery rail, absorbing up to 36 kW energy without failure. Use Value: AEC-Q101 qualification and 150 °C junction rating ensure robustness in under-hood environments. |
| Industrial Ethernet Port Protection | Renewable Energy Inverter DC Link |
Use Scenario: Shielding PoE-powered Ethernet PHYs from EFT and ESD per IEC 61000-4-2/4-4 during field deployment. IC Role / Device Role / Timing Role: Secondary TVS on isolated Ethernet transformer center taps to limit common-mode surge coupling. Use Value: 85 V VWM aligns with 100BASE-TX common-mode voltage margin; bidirectional symmetry prevents polarity miswiring. |
Use Scenario: Clamping voltage overshoot on DC link capacitors during IGBT turn-off in solar inverters. IC Role / Device Role / Timing Role: High-energy TVS placed across DC+ and DC− rails to absorb switching-induced transients. Use Value: 36,000 W peak power rating handles repetitive 10/1000 μs surges typical in grid-tied inverter fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA | Lower peak power (600 W), smaller SMB package, higher RθJA (90 °C/W), no AEC-Q101 or DO-160G validation | Suitable for consumer-grade I/O protection; insufficient for multi-stroke lightning or automotive load dump | Select only for cost-sensitive, low-energy surge environments where 36 kW rating is unnecessary |
| SMCJ85CA | 3,000 W peak power, SMC package, RθJC = 2.5 °C/W, AEC-Q101 qualified but not DO-160G tested | Valid for automotive ECU protection per ISO 7637-2, but lacks avionics-level surge endurance | Prefer when board space allows SMC footprint and application requires automotive qualification without aircraft compliance |
Compared with SMBJ85CA and SMCJ85CA, the MPLAD36KP85CA/TR delivers 12× and 12× higher peak power respectively, with certified DO-160G Waveform 4 performance and superior thermal management - making it the only option for mission-critical avionics and heavy-duty automotive load dump.
Availability
MPLAD36KP85CA/TR is available at Aetrix Electronics and suitable for aircraft data bus protection, automotive load dump suppression, industrial Ethernet port hardening, and renewable energy inverter DC link clamping requiring stable component supply across long-lifecycle programs.
Supply support for MPLAD36KP85CA/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) designs high-reliability analog, mixed-signal, and power semiconductors for aerospace, defense, communications, and industrial markets.
The MPLAD36KP85CA/TR belongs to the PLAD-series high-power TVS family engineered specifically for multi-stroke lightning protection in avionics and ruggedized automotive systems - emphasizing thermal robustness, bidirectional symmetry, and regulatory compliance.
FAQ
What is the clamping voltage of MPLAD36KP85CA/TR at its rated peak pulse current?
The MPLAD36KP85CA/TR has a maximum clamping voltage (VC) of 137 V at 263 A peak impulse current (IPP) under the 10/1000 μs waveform. This value ensures protected circuits experience no more than 137 V during worst-case surge events, maintaining safe operating margins for downstream 100 V-rated components. The clamping performance is validated per IEC 61000-4-5 testing protocols.
Is MPLAD36KP85CA/TR qualified for automotive applications?
Yes, MPLAD36KP85CA/TR is AEC-Q101 qualified, confirming its suitability for automotive powertrain and chassis applications including load dump protection. It meets stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life. However, its full DO-160G certification makes it especially valuable in dual-use automotive/avionics platforms where both standards apply.
Does MPLAD36KP85CA/TR require special PCB layout considerations?
Yes - the MPLAD36KP85CA/TR requires a dedicated thermal pad layout per Figure 7 in the datasheet: a large copper area (≥250 mm²) connected to the metal base (cathode) with multiple thermal vias to inner-layer ground planes. This achieves the specified RθJA = 50 °C/W and prevents thermal runaway during repeated surges. Standard SMD footprints are insufficient.
What does the "CA" suffix indicate in MPLAD36KP85CA/TR?
The "CA" suffix in MPLAD36KP85CA/TR denotes bidirectional construction, meaning the device provides symmetrical clamping for both positive and negative transients without polarity dependence. This differs from unidirectional variants (e.g., MPLAD36KP85A) that conduct only in reverse bias. Bidirectionality is essential for AC-coupled lines, differential buses, and floating grounds.
Can MPLAD36KP85CA/TR be used for IEC 61000-4-5 compliance testing?
Yes - MPLAD36KP85CA/TR is explicitly rated for secondary lightning protection per IEC 61000-4-5 with 42 Ω, 12 Ω, and 2 Ω source impedances across Class 1–5. At 85 V VWM, it covers Class 1–4 with 42 Ω source and Class 1–3 with 12 Ω source. Its 137 V clamping voltage and 263 A IPP ensure pass/fail margin in formal compliance testing.
MPLAD36KP85CA/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):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 263A
- 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
MPLAD36KP85CA/TR FAQ
1.How can I place an order for MPLAD36KP85CA/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP85CA/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 MPLAD36KP85CA/TR reliable?
The price and inventory of MPLAD36KP85CA/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP85CA/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP85CA/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP85CA/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP85CA/TR?
MPLAD36KP85CA/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP85CA/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 MPLAD36KP85CA/TR?
For technical support, including MPLAD36KP85CA/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP85CA/TR requirements.
6.How does Aetrix verify that MPLAD36KP85CA/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP85CA/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 MPLAD36KP85CA/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP85CA/TR?
All MPLAD36KP85CA/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP85CA/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 MPLAD36KP85CA/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP85CA/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP85CA/TR Tags
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