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Microchip Technology MPLAD36KP64A
- Part No.:
- MPLAD36KP64A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP64A.pdf
- Description:
- TVS DIODE 64VWM 103VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:9,800
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Product details
Overview
MPLAD36KP64A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps at ≤103.0 V under 350 A peak impulse current, and features a 64 V reverse standoff voltage (VWM) with 71.1–78.6 V breakdown range. It is qualified to AEC-Q101 and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MPLAD36KP64A datasheet, MPLAD36KP64A pinout, MPLAD36KP64A application, or MPLAD36KP64A equivalent, key selection criteria include its 64 V VWM rating, 103.0 V max clamping voltage at 350 A, low 1.0 °C/W junction-to-case thermal resistance, RoHS-compliant e3 plating, and suitability for secondary lightning protection per IEC 61000-4-5 with 42 Ω, 12 Ω, or 2 Ω source impedances.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry, activating above its 64 V standoff threshold to divert surge energy away from downstream components. Its silicon avalanche structure enables sub-100 ps response time and stable breakdown behavior across -55°C to +150°C operating range.
Designed for high-reliability mounting on FR4 PCBs with specified pad layout, it achieves 36 kW pulse handling via low thermal resistance (RθJC = 1.0 °C/W) and void-free UL94V-0 epoxy packaging. It supports both single-event and repetitive surge conditions with ≤0.05% duty factor per test standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous DC or RMS operating voltage the device blocks without conduction. |
| V(BR) min/max | 71.1–78.6 V @ 5 mA - Confirmed avalanche onset range ensures predictable turn-on margin above VWM. |
| VC @ IPP | ≤103.0 V @ 350 A - Clamping voltage limits downstream voltage stress during worst-case 10/1000 μs surges. |
| PPP | 36,000 W @ 10/1000 μs - Peak power rating defines maximum single-pulse energy absorption capability. |
| RθJC | 1.0 °C/W - Enables effective heat transfer to heatsink or copper plane, critical for thermal stability under repeated surges. |
| ID @ VWM | ≤10 μA - Ultra-low leakage preserves system efficiency and prevents false triggering in high-impedance circuits. |
| Package | PLAD - Surface-mount thermoset epoxy package with metal base cathode, optimized for mechanical robustness and thermal dissipation. |
Pinout & Package
The MPLAD36KP64A uses a 2-terminal PLAD surface-mount package with the cathode electrically connected to the exposed metal base (bottom side), and the anode accessible via the top-side metallized terminal. Mounting requires adherence to the specified pad layout (A = 0.470", B = 0.230", C = 0.100") for optimal thermal and mechanical performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top metallization) | Surge current entry point for unidirectional clamping | Connected to protected line; conducts only during positive transients relative to cathode reference. |
| Cathode (metal base) | Surge current return path and thermal interface | Must be soldered to large copper area or heatsink; serves as primary thermal conduction path and ground reference. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use with temperature cycling, HTRB, and surge endurance testing. |
| RTCA DO-160 Section 22 compliance | Proven multi-stroke lightning immunity up to Level 5 for aircraft avionics and flight control systems. |
| IEC 61000-4-5 Class 5 support (42 Ω source) | Enables secondary lightning protection in long-distance wiring configurations up to 260 V standoff variants. |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints-ready for standard SMT reflow without baking. |
| RoHS-compliant e3 plating | Tin-only matte finish ensures lead-free assembly compatibility and corrosion resistance per MIL-STD-750 Method 2026. |
Applications
| Aerospace Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC power inputs in flight management computers subjected to DO-160 Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs) pin injection transients. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point to limit transient voltage before reaching DC-DC converters and microcontrollers. Use Value: Limits clamped voltage to ≤103.0 V, preserving 100 V-rated input capacitors and preventing latch-up in 3.3 V/5 V logic rails downstream. | Use Scenario: Load dump suppression on 12 V battery-fed ECU power rails during alternator regulation failure (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: High-power shunt protector absorbing >36 kW surge energy while maintaining <103.0 V clamp level for 350 ms duration. Use Value: Prevents destruction of MCU, CAN transceivers, and sensor interfaces by limiting bus voltage excursion beyond 103.0 V during 120 V/400 ms load dump events. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: Surge protection on 60–80 V DC link buses in variable-frequency drives exposed to switching-induced RFI and inductive kickback. IC Role / Device Role / Timing Role: Fast-response parallel clamp suppressing transients generated by IGBT commutation and contactor opening. Use Value: Sub-100 ps response ensures clamping activation before voltage overshoot exceeds 103.0 V, protecting gate drivers and bus capacitors rated for 100 V. | Use Scenario: Secondary lightning protection for 64 V signaling lines in trackside interlocking systems per EN 50121-4 (IEC 61000-4-5 with 42 Ω source impedance). IC Role / Device Role / Timing Role: Standoff-matched TVS (VWM = 64 V) deployed at field cable entry points to absorb induced surges from nearby lightning strikes. Use Value: Meets Class 5 requirements for long-distance wiring, ensuring system uptime by preventing damage to optocouplers and isolated RS-485 transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | 600 W PPP rating (vs. 36,000 W); DO-214AA package; RθJC ≈ 40 °C/W | Only suitable for low-energy transients (e.g., ESD, EFT); cannot handle load dump or lightning surges | Select SMBJ64A only for board-level ESD protection where surge energy is <10 J and repetition rate is low. |
| SMCJ64A | 1500 W PPP rating; DO-214AB package; RθJC ≈ 12 °C/W; same VWM/V(BR)/VC specs but lower energy capacity | Applicable for moderate automotive transients (ISO 7637-2 Pulse 1/2/3a) but fails DO-160 Section 22 multi-stroke validation | Choose SMCJ64A for cost-sensitive industrial controls where full lightning immunity is not required. |
Compared with SMBJ64A and SMCJ64A, the MPLAD36KP64A provides 24× and 24× higher peak pulse power respectively, enabling reliable operation in mission-critical aerospace and heavy-duty automotive environments where multi-kilojoule surge energy must be safely absorbed without degradation.
Availability
MPLAD36KP64A is available at Aetrix Electronics and suitable for aerospace avionics, automotive engine control units, industrial motor drives, and railway signaling systems requiring stable component supply across extended product lifecycles.
Supply support for MPLAD36KP64A 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 U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened ICs for aerospace, defense, and industrial markets.
The MPLAD36KP64A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump compliance in safety-critical platforms.
FAQ
What is the clamping voltage specification for MPLAD36KP64A under peak surge conditions?
The MPLAD36KP64A has a maximum clamping voltage (VC) of 103.0 V when subjected to its rated peak pulse current of 350 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01216 datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The MPLAD36KP64A maintains this clamping performance across its full operating temperature range (-55°C to +150°C) due to its stable avalanche characteristics.
Is MPLAD36KP64A suitable for bidirectional signal line protection?
No, the MPLAD36KP64A is a unidirectional TVS diode, indicated by the "A" suffix (versus "CA" for bidirectional versions). Its cathode is the metal base, and it conducts only during positive transients relative to that reference. For bidirectional AC or data-line protection, the MPLAD36KP64CA variant must be used instead. Using MPLAD36KP64A on bidirectional lines risks forward conduction during negative excursions and potential device failure.
Does MPLAD36KP64A require special PCB layout considerations?
Yes - the MPLAD36KP64A demands strict adherence to the recommended pad layout (A = 0.470", B = 0.230", C = 0.100") and requires the metal base (cathode) to be soldered to a minimum 1.0 in² copper pour or heatsink for thermal management. Deviation from the layout reduces its 36 kW pulse rating due to increased junction temperature. The MPLAD36KP64A also requires short, low-inductance traces to the protected node to preserve sub-100 ps response time.
What certifications does MPLAD36KP64A meet for automotive use?
The MPLAD36KP64A is qualified to AEC-Q101 for stress testing including temperature cycling, high-temperature reverse bias (HTRB), and surge endurance. It is not ISO/TS 16949 certified as a component, but its qualification supports integration into automotive ECUs targeting ISO 16750-2 (electrical loads) and ISO 7637-2 (transient immunity). The MPLAD36KP64A's 36 kW rating directly addresses Load Dump Pulse 5a requirements in 12 V systems.
Can MPLAD36KP64A be used in RoHS-compliant manufacturing processes?
Yes - the MPLAD36KP64A carries the "e3" designation, indicating RoHS-compliant annealed matte-tin plating per JEDEC J-STD-020B. It is compatible with lead-free reflow profiles up to 260°C for 10 seconds and requires no dry-pack moisture barrier bag. The MPLAD36KP64A's UL94V-0 epoxy body and tin-only terminations ensure full compliance with EU RoHS Directive 2011/65/EU and China RoHS.
MPLAD36KP64A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 350A
- Power - Peak Pulse:
- 36000W (36kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PLAD
MPLAD36KP64A FAQ
1.How can I place an order for MPLAD36KP64A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP64A 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 MPLAD36KP64A reliable?
The price and inventory of MPLAD36KP64A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP64A is usually 5 days.
3.What payment methods are accepted for MPLAD36KP64A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP64A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP64A?
MPLAD36KP64A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP64A 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 MPLAD36KP64A?
For technical support, including MPLAD36KP64A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP64A requirements.
6.How does Aetrix verify that MPLAD36KP64A is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP64A 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 MPLAD36KP64A meets industry standards.
7.What is the process for return or replacement of MPLAD36KP64A?
All MPLAD36KP64A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP64A, 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 MPLAD36KP64A part is unused and in its original packaging.
Return procedure for MPLAD36KP64A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP64A Tags
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