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Microchip Technology MPLAD36KP85CAE3/TR
- Part No.:
- MPLAD36KP85CAE3/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP85CAE3/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:8,422
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Product details
Overview
MPLAD36KP85CAE3/TR from Microsemi (now Microchip) 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 and load dump suppression in aerospace and automotive power rails.
For engineers reviewing the MPLAD36KP85CAE3/TR datasheet, MPLAD36KP85CAE3/TR pinout, MPLAD36KP85CAE3/TR application, or MPLAD36KP85CAE3/TR equivalent, this device delivers verified IEC 61000-4-5 Class 5 compliance (42 Ω source), RTCA DO-160G Waveform 4 Level 4 protection, AEC-Q101 qualification, and low thermal resistance (RθJC = 1.0 °C/W) in a PLAD package optimized for high-reliability board-level surge immunity.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection against voltage transients regardless of polarity - critical for AC-coupled interfaces and ungrounded systems. Its low clamping ratio (VC/VBR ≈ 1.35) and sub-5 ns response time ensure rapid voltage limiting during fast-rising surges such as EFT or induced RFI.
The PLAD package features a metal base acting as the cathode terminal for unidirectional variants and as the common reference plane for bidirectional operation, with thermal performance validated under FR4 mounting (1 oz Cu) and junction-to-case resistance of 1.0 °C/W - supporting high-energy dissipation without external heatsinking in short-duration events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 36,000 W at 10/1000 μs - sustains multi-stroke lightning surges per RTCA DO-160 Section 22 without degradation |
| Working Standoff Voltage (VWM) | 85 V DC - sets maximum continuous operating voltage before conduction begins; matches 72 V nominal automotive/aircraft bus systems |
| Breakdown Voltage (VBR) | 94.4–104.0 V at 5 mA - defines onset of avalanche conduction; tight tolerance ensures predictable turn-on across temperature |
| Clamping Voltage (VC) | 137 V at 263 A peak pulse - limits downstream voltage stress to safe levels for 48 V–72 V system ICs and controllers |
| Peak Pulse Current (IPP) | 263 A at 10/1000 μs - quantifies maximum transient energy absorption capability per single event |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to PCB copper pour or heatsink, critical for repetitive surge handling |
| Temperature Coefficient (αVBR) | 104 mV/°C - indicates positive drift of breakdown voltage with temperature, aiding thermal stability in wide-range environments |
Pinout & Package
The MPLAD36KP85CAE3/TR uses the PLAD surface-mount package: void-free thermosetting epoxy body (UL94V-0), metal base acting as common terminal for bidirectional operation, tin-plated terminals solderable per MIL-STD-750 Method 2026, and weight ~1.7–2.0 g. Polarity marking is absent on bidirectional variants; terminals are symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 / Cathode 1 | Common terminal (metal base) | Serves as shared reference node for bidirectional clamping; must be connected to system ground or chassis return path |
| Anode 2 / Cathode 2 | Signal/power line terminal | Connected to protected line (e.g., CAN_H, RS-485 A/B, or DC bus); forms symmetrical clamp path with metal base |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional construction (CA suffix) | Enables symmetrical clamping on AC or floating lines without polarity sensitivity - essential for data bus and sensor interface protection |
| AEC-Q101 qualification | Validates reliability under automotive temperature cycling, humidity, and mechanical shock - required for under-hood and powertrain applications |
| RTCA DO-160G Waveform 4 Level 4 compliance | Guarantees survivability against 6.4/69 μs pin-injection transients up to 100 V, meeting aircraft avionics EMC requirements |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to reflow - reduces manufacturing cost and avoids moisture-induced popcorning |
| 3σ lot norm screening on ID | Ensures standby leakage ≤10 µA at 85 V, minimizing quiescent power loss in always-on systems like battery monitors or telemetry modules |
Applications
| Aerospace Avionics Power Bus Protection | Automotive 48 V Mild Hybrid DC Bus |
|---|---|
Use Scenario: Protecting 28 V and 270 V DC distribution networks in commercial aircraft against lightning-induced surges per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary secondary surge suppressor placed at power entry points and subsystem interfaces to limit transient overvoltage to <140 V. Use Value: Enables compliance with RTCA DO-160G Waveform 4 Level 4 and Waveform 5A Level 4, reducing need for upstream filtering and shielding mass. |
Use Scenario: Safeguarding 48 V battery management systems and DC-DC converters in mild hybrid vehicles from load dump and alternator transients. IC Role / Device Role / Timing Role: High-energy clamping device mounted directly at battery input terminals to absorb >300 A transients within nanoseconds. Use Value: Maintains VC = 137 V at 263 A, keeping downstream SiC MOSFET gate drivers and microcontrollers within safe operating area during ISO 16750-2 pulses. |
| Industrial Ethernet PHY Interface | Railway Signaling Data Line |
Use Scenario: Protecting RS-485/RS-422 transceivers and Ethernet PHYs in factory automation equipment from ESD and EFT per IEC 61000-4-2/4-4. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pairs (e.g., CAN_H/CAN_L or RS-485 A/B) to clamp common-mode surges. Use Value: Sub-5 ns response and low capacitance (<100 pF typical) prevent signal integrity degradation while meeting IEC 61000-4-5 Class 4 (42 Ω) immunity. |
Use Scenario: Securing signaling lines in train control and communication systems exposed to traction-induced surges and electromagnetic interference. IC Role / Device Role / Timing Role: Secondary protection element installed at trackside equipment interfaces to suppress coupled transients from pantograph arcing or braking regeneration. Use Value: Withstands repeated 10/1000 μs surges up to 36 kW, supporting EN 50121-3-2 compliance for rolling stock EMC without derating below –40 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA | Lower peak power (600 W), smaller SMB package, higher RθJA (65 °C/W), no AEC-Q101 or DO-160 qualification | Suitable only for low-energy ESD/EFT; cannot meet DO-160 lightning or ISO 16750-2 load dump | Select when cost and board space constrain requirements and surge energy remains below 100 A (10/1000 μs) |
| SMCJ85CA | Higher peak power (1500 W), SMC package, RθJC = 2.5 °C/W, AEC-Q101 qualified but not DO-160 tested | Meets automotive ESD/EFT and basic load dump; insufficient for multi-stroke lightning or aircraft certification | Choose for cost-sensitive automotive ECUs where full DO-160 compliance is not mandated |
Compared with SMBJ85CA and SMCJ85CA, the MPLAD36KP85CAE3/TR delivers 24× and 24× higher peak power respectively, certified DO-160G Waveform 4 Level 4 performance, and 2.5× lower thermal resistance - making it the only option for aerospace-grade lightning protection and high-reliability 48 V hybrid vehicle bus clamping.
Availability
MPLAD36KP85CAE3/TR is available at Aetrix Electronics and suitable for aerospace avionics, automotive 48 V mild hybrid systems, industrial Ethernet infrastructure, and railway signaling applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MPLAD36KP85CAE3/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 analog, mixed-signal, and RF solutions for aerospace, defense, communications, and industrial markets.
The MPLAD36KP85CAE3/TR belongs to Microsemi's high-power PLAD TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump suppression in mission-critical power and data interfaces.
FAQ
What is the clamping voltage of MPLAD36KP85CAE3/TR at its rated peak pulse current?
The MPLAD36KP85CAE3/TR has a maximum clamping voltage (VC) of 137 V when subjected to its rated peak pulse current of 263 A at the 10/1000 μs waveform. This value is measured per standard test conditions defined in IEC 61000-4-5 and ensures downstream components see limited overvoltage during surge events. The clamping performance is guaranteed across the full operating temperature range of –55 °C to +150 °C.
Is MPLAD36KP85CAE3/TR qualified for automotive applications?
Yes, MPLAD36KP85CAE3/TR is AEC-Q101 qualified, confirming its suitability for automotive use including under-hood and powertrain environments. It meets temperature cycling, mechanical shock, and humidity resistance requirements per the AEC-Q101 stress test standard. However, its full DO-160G qualification makes it especially valuable in automotive applications requiring aircraft-grade surge immunity, such as electric vehicle charging infrastructure and advanced driver-assistance systems.
Does MPLAD36KP85CAE3/TR require special PCB layout considerations?
Yes - the MPLAD36KP85CAE3/TR requires a dedicated thermal pad layout per Figure 7 in the datasheet: a minimum 25 mm² copper pour (1 oz Cu) connected to the metal base terminal, with thermal vias to inner layers if ambient temperatures exceed 85 °C. Short, low-inductance traces to protected lines and ground are essential to preserve its <5 ns response time. Avoid routing sensitive signals near the device body due to potential coupling during clamping.
What does the "TR" suffix in MPLAD36KP85CAE3/TR indicate?
The "TR" suffix in MPLAD36KP85CAE3/TR denotes tape-and-reel packaging per EIA-481-B standard, enabling automated SMT placement. This version includes RoHS-compliant matte-tin plating (e3), bidirectional polarity (CA), and is supplied in custom reels optimized for high-volume production. The base part MPLAD36KP85CAE3 is identical electrically and thermally; only packaging differs.
Can MPLAD36KP85CAE3/TR be used for IEC 61000-4-5 Class 5 testing?
Yes, MPLAD36KP85CAE3/TR is explicitly rated for IEC 61000-4-5 Class 5 secondary lightning protection with a 42 Ω source impedance in short-distance configurations. Its 36,000 W rating and 137 V clamping voltage ensure compliance when protecting 72 V nominal systems. For long-distance Class 5 (12 Ω or 2 Ω sources), lower-voltage variants such as MPLAD36KP38CA are recommended per Table 4 in the datasheet.
MPLAD36KP85CAE3/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
MPLAD36KP85CAE3/TR FAQ
1.How can I place an order for MPLAD36KP85CAE3/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP85CAE3/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 MPLAD36KP85CAE3/TR reliable?
The price and inventory of MPLAD36KP85CAE3/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP85CAE3/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP85CAE3/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP85CAE3/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP85CAE3/TR?
MPLAD36KP85CAE3/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP85CAE3/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 MPLAD36KP85CAE3/TR?
For technical support, including MPLAD36KP85CAE3/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP85CAE3/TR requirements.
6.How does Aetrix verify that MPLAD36KP85CAE3/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP85CAE3/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 MPLAD36KP85CAE3/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP85CAE3/TR?
All MPLAD36KP85CAE3/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP85CAE3/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 MPLAD36KP85CAE3/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP85CAE3/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP85CAE3/TR Tags
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