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Microchip Technology MPLAD36KP85A/TR
- Part No.:
- MPLAD36KP85A/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP85A/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:9,345
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Product details
Overview
MPLAD36KP85A/TR from Microsemi is a unidirectional 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 lightning and load dump protection in aerospace and automotive power rails.
For engineers reviewing the MPLAD36KP85A/TR datasheet, MPLAD36KP85A/TR pinout, MPLAD36KP85A/TR application, or MPLAD36KP85A/TR equivalent, key selection criteria include its 1.0 °C/W junction-to-case thermal resistance, AEC-Q101 qualification, DO-160G Waveform 4 & 5A compliance, and low-profile PLAD package optimized for high-energy transient suppression without PCB layout compromise.
Technical Context
This TVS diode operates in avalanche breakdown mode to clamp overvoltage transients, delivering sub-100 ps response time for unidirectional devices. Its metal-base cathode construction enables direct thermal coupling to heatsinks, supporting sustained power dissipation up to 504 W at 100 °C case temperature.
The device meets IEC 61000-4-5 secondary lightning protection across multiple source impedances (2 Ω, 12 Ω, 42 Ω) and RTCA/DO-160G Level 4/5 pin injection requirements - validated per bidirectional-capable family testing, though MPLAD36KP85A/TR itself is unidirectional (no "CA" suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - maximum continuous DC or repetitive peak reverse voltage before conduction begins; sets minimum system operating margin. |
| VBR | 94.4–104.0 V at 5 mA - precise breakdown threshold defining turn-on consistency across production lots. |
| VC | 137 V at 263 A (10/1000 μs) - clamped voltage seen by protected circuit during worst-case surge event. |
| IPP | 263 A - peak non-repetitive surge current capability under standard 10/1000 μs waveform. |
| RθJC | 1.0 °C/W - enables efficient heat transfer from die to heatsink, critical for multi-stroke reliability in avionics. |
| TJ Range | –55 to +150 °C - supports operation in extended-temperature environments including engine bays and flight control systems. |
| AEC-Q101 | Qualified - confirms robustness for automotive powertrain and chassis applications per stress-test standards. |
Pinout & Package
The MPLAD36KP85A/TR uses the PLAD surface-mount package: void-free thermosetting epoxy body (UL94V-0), tin-plated terminals, and metal base acting as cathode terminal. Cathode polarity is marked on the bottom metal surface; anode connects via 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 thermal pad for RθJC = 1.0 °C/W performance. |
| Top Metallization | Anode | High-current input node for transient energy diversion; requires low-inductance trace routing to minimize overshoot. |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW Peak Pulse Power | Enables single-device protection against severe load dump (ISO 16750-2) and DO-160 Section 22 lightning surges without parallel staging. |
| Low RθJC = 1.0 °C/W | Allows direct mounting to aluminum heatsinks or copper planes, eliminating need for thermal interface materials in space-constrained designs. |
| AEC-Q101 Qualification | Validates reliability for automotive Grade 0/1 applications including 12 V/24 V battery rail protection in ADAS and infotainment ECUs. |
| DO-160G Waveform 4 & 5A Compliance | Meets aircraft-level pin-injection immunity (6.4/69 μs and 40/120 μs) up to Level 5 at 85 V standoff, enabling use in flight-critical subsystems. |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to reflow, reducing manufacturing cost and handling risk. |
Applications
| Aerospace Power Distribution | Automotive Engine Control Unit |
|---|---|
Use Scenario: Protection of 28 V DC bus in avionics power supplies against DO-160G Section 22 lightning-induced transients. IC Role / Device Role / Timing Role: Primary transient shunt device placed at bus entry point to divert >25 kA surge currents away from downstream regulators and FPGAs. Use Value: Achieves Level 5 compliance for Waveform 4 (6.4/69 μs) with 137 V clamping, limiting voltage stress on 36 V-rated DC/DC converters. | Use Scenario: Load dump suppression on 12 V battery-fed ECU inputs during alternator field cutoff events. IC Role / Device Role / Timing Role: Unidirectional TVS connected between battery rail and ground to clamp ISO 16750-2 Test 4a/4b pulses (≥100 V, 400 ms duration). Use Value: Withstands 263 A peak current while maintaining clamping below 137 V, preventing latch-up in microcontrollers and CAN transceivers. |
| Industrial Motor Drive DC Link | Railway Signaling Interface |
Use Scenario: Surge protection on 400 V DC link of variable-frequency drives exposed to switching transients and induced RFI. IC Role / Device Role / Timing Role: High-energy TVS mounted directly across DC bus capacitors to absorb IGBT turn-off spikes and line-commutated rectifier surges. Use Value: 36 kW rating handles repetitive 10/1000 μs transients up to 263 A without degradation, extending capacitor lifetime and reducing failure rate. | Use Scenario: Secondary lightning protection for 72 V signaling lines in European railway interlocking systems per EN 50121-4. IC Role / Device Role / Timing Role: Standoff-voltage-matched TVS installed at trackside cabinet entry points to meet IEC 61000-4-5 Class 4 (42 Ω source) requirements. Use Value: 137 V clamping ensures protected Ethernet PHYs and optocouplers remain within safe operating area during 4 kV surge tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85A | 600 W rating (vs. 36,000 W); 100 V VC at 62 A; SMB package with RθJC ≈ 35 °C/W. | Only suitable for low-energy ESD/EFT; cannot handle load dump or lightning surges. | Select only for board-level ESD protection where surge energy is <10 J. |
| SMCJ85A | 1500 W rating; 135 V VC at 117 A; SMC package with RθJC ≈ 15 °C/W. | Supports moderate automotive transients but fails DO-160G Level 4/5 and multi-stroke lightning. | Use when cost is constrained and peak surge energy remains below 100 J. |
Compared with SMBJ85A and SMCJ85A, the MPLAD36KP85A/TR delivers 60× and 24× higher peak power handling respectively, enabling single-device compliance with DO-160G and ISO 16750-2 - critical for aerospace and heavy-duty automotive systems where thermal derating and multi-event survivability are mandatory.
Availability
MPLAD36KP85A/TR is available at Aetrix Electronics and suitable for aerospace power distribution, automotive engine control units, industrial motor drive DC links, and railway signaling interfaces requiring stable component supply across long product lifecycles.
Supply support for MPLAD36KP85A/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 MPLAD36KP85A/TR belongs to the PLAD-series high-power TVS family engineered specifically for multi-stroke lightning and load dump protection in mission-critical power systems where thermal management and regulatory compliance are non-negotiable.
FAQ
What is the clamping voltage of MPLAD36KP85A/TR at its rated peak pulse current?
The MPLAD36KP85A/TR has a maximum clamping voltage (VC) of 137 V when subjected to its rated peak impulse current of 263 A under the standard 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and guarantees that downstream components see no more than 137 V during worst-case surge events, making it suitable for protecting 100 V-rated circuits in aerospace and automotive applications.
Is MPLAD36KP85A/TR RoHS-compliant and what does the "TR" suffix indicate?
Yes, MPLAD36KP85A/TR is RoHS-compliant (per e3 marking), and the "TR" suffix denotes tape-and-reel packaging per EIA-481-B standard - enabling automated SMT placement. The device uses annealed matte-tin plating on terminals and meets MIL-STD-750 Method 2026 solderability requirements, ensuring reliable reflow joint formation without lead contamination concerns.
How does the thermal performance of MPLAD36KP85A/TR compare to standard SMC/SMB TVS diodes?
MPLAD36KP85A/TR achieves a junction-to-case thermal resistance (RθJC) of 1.0 °C/W - over 15× lower than typical SMC (≈15 °C/W) or SMB (≈35 °C/W) packages. This is enabled by its metal-base cathode design, which provides direct thermal conduction to heatsinks or PCB copper planes, allowing sustained power dissipation up to 504 W at 100 °C case temperature - far exceeding conventional surface-mount TVS limits.
Does MPLAD36KP85A/TR meet AEC-Q101 requirements for automotive under-hood applications?
Yes, MPLAD36KP85A/TR is AEC-Q101 qualified for transient voltage suppression in automotive applications. It passes stress tests including high-temperature reverse bias, temperature cycling, and humidity bias HAST, validating reliability in under-hood environments with operating junction temperatures up to +150 °C and exposure to vibration, thermal shock, and chemical contaminants.
Can MPLAD36KP85A/TR be used for bidirectional transient suppression?
No, MPLAD36KP85A/TR is unidirectional (indicated by "A" suffix, not "CA"). It conducts only during reverse-biased overvoltage events and blocks forward current. For bidirectional protection, Microsemi offers the MPLAD36KP85CA variant - which shares identical VWM, VBR, and VC ratings but adds symmetrical clamping for AC-coupled or floating-rail applications.
MPLAD36KP85A/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):
- 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
MPLAD36KP85A/TR FAQ
1.How can I place an order for MPLAD36KP85A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP85A/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 MPLAD36KP85A/TR reliable?
The price and inventory of MPLAD36KP85A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP85A/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP85A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP85A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP85A/TR?
MPLAD36KP85A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP85A/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 MPLAD36KP85A/TR?
For technical support, including MPLAD36KP85A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP85A/TR requirements.
6.How does Aetrix verify that MPLAD36KP85A/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP85A/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 MPLAD36KP85A/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP85A/TR?
All MPLAD36KP85A/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP85A/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 MPLAD36KP85A/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP85A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP85A/TR Tags
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