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Microchip Technology MPLAD36KP75A
- Part No.:
- MPLAD36KP75A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP75A.pdf
- Description:
- TVS DIODE 75VWM 121VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,304
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Product details
Overview
MPLAD36KP75A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps at ≤121 V under 298 A peak impulse current, and features a 75 V reverse standoff voltage (VWM) with 83.3–92.1 V breakdown range. It meets RTCA DO-160 Section 22 multi-stroke lightning requirements and IEC 61000-4-5 Class 4 secondary lightning protection (42 Ω source).
For engineers reviewing the MPLAD36KP75A datasheet, MPLAD36KP75A pinout, MPLAD36KP75A application, or MPLAD36KP75A equivalent, key selection criteria include its 75 V VWM rating, 121 V max clamping voltage at 298 A, low thermal resistance (1.0 °C/W junction-to-case), RoHS-compliant e3 plating, and qualification per AEC-Q101 and MIL-PRF-19500 screening options.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, activating above its 75 V standoff threshold to divert surge energy away from sensitive components. Its silicon avalanche structure ensures fast response (<100 ps rise time) and stable breakdown characteristics across temperature, with ±0.09 %/°C temperature coefficient of V(BR).
The device uses a void-free UL94V-0 thermosetting epoxy package with metal base cathode termination, enabling efficient heat dissipation via PCB copper pour or heatsink mounting. Thermal resistance is specified at RθJC = 1.0 °C/W and RθJA = 50 °C/W on FR4 with recommended pad layout, supporting sustained operation under repetitive transients at ≤0.05% duty factor.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous DC or peak AC voltage the device blocks without conduction. |
| V(BR) min/max | 83.3–92.1 V @ 5 mA - Confirmed avalanche onset range; ensures reliable triggering above system operating voltage. |
| VC @ IPP | 121 V @ 298 A - Clamping voltage during 10/1000 μs surge; defines maximum stress imposed on downstream circuitry. |
| PPP | 36,000 W @ 10/1000 μs - Peak surge handling capacity; validates suitability for aircraft lightning injection (DO-160 Waveform 4/5A Level 4/5). |
| ID @ VWM | 10 μA max - Low leakage ensures minimal standby power loss and no false triggering in high-impedance bias networks. |
| RθJC | 1.0 °C/W - Enables direct thermal coupling to heatsink or large copper area; critical for multi-pulse reliability in automotive load dump events. |
| Package | PLAD - Surface-mount, metal-base package with cathode on bottom; requires thermal pad design per datasheet Figure "PAD LAYOUT". |
Pinout & Package
PLAD package: surface-mount, rectangular thermoset epoxy body with exposed metal base acting as cathode terminal. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ~1.7–2.0 g. Requires solderable matte-tin (e3) or SnPb plating per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface) | Surge current entry point | Connected to line/pin requiring protection; forms series path with cathode to shunt energy to ground. |
| Cathode (metal base) | Surge current return path / thermal interface | Must be soldered to large copper pour or heatsink; serves dual role as electrical return and primary thermal conduction path. |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW peak pulse power | Validated for RTCA DO-160 Section 22 multi-stroke lightning testing - enables single-device compliance in avionics power inputs. |
| AEC-Q101 qualified | Qualified for automotive underhood applications including alternator load dump suppression per ISO 7637-2 Pulse 5a/b. |
| Low RθJC = 1.0 °C/W | Supports >1000 surge cycles at 0.05% duty factor when mounted on ≥25 cm² 2 oz copper - extends service life in industrial motor drives. |
| RoHS-compliant e3 marking | Tin-plated terminals meet J-STD-020B Level 1 moisture sensitivity - eliminates bake requirement and supports lead-free reflow. |
| IEC 61000-4-5 Class 4 support | Rated for 4 kV surge immunity with 42 Ω source impedance - satisfies EN 55032/55035 EMI filter input protection requirements. |
Applications
| Aerospace Power Distribution | Automotive Alternator Output |
|---|---|
Use Scenario: Protection of 28 V DC bus in commercial aircraft avionics bays against lightning-induced surges per DO-160F Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS placed between main bus and downstream DC-DC converters to clamp transients before they propagate. Use Value: MPLAD36KP75A's 36 kW rating and <100 ps response ensure clamping within first 100 ns of waveform 4 (6.4/69 μs), preventing latch-up in FPGAs and microcontrollers. | Use Scenario: Load dump suppression on vehicle battery feed lines where alternator regulation fails and voltage spikes to 120 V. IC Role / Device Role / Timing Role: Primary clamping device across battery rail, triggered by overvoltage exceeding 75 V standoff level. Use Value: With 121 V clamping at 298 A, MPLAD36KP75A limits downstream voltage stress to safe levels for 48 V-rated CAN transceivers and power management ICs. |
| Industrial Motor Drive Inputs | Renewable Energy Inverter DC Link |
Use Scenario: Surge protection on 75 V-rated control power supply inputs subjected to switching transients from nearby contactors and VFDs. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing repetitive 1–5 kA transients induced by inductive kickback in factory automation panels. Use Value: Low RθJC (1.0 °C/W) and 0.05% duty cycle capability allow >10⁴ surge events without thermal runaway - validated per AEC-Q101 stress profiles. | Use Scenario: DC link protection in solar string inverters where PV array open-circuit voltage reaches 75 V and lightning surges couple into combiner boxes. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; unidirectional MPLAD36KP75A used with polarity-aware placement to protect positive rail only. Use Value: 75 V VWM matches typical 72 V nominal PV string voltage, minimizing leakage while ensuring margin above MPPT operating range (60–72 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A | 600 W PPP rating, DO-214AA package, RθJC ≈ 40 °C/W | Not suitable for DO-160 multi-stroke or IEC 61000-4-5 Class 4; limited to consumer-grade surge events | Select only for cost-sensitive, low-energy applications where 36 kW capability is unnecessary. |
| SMCJ75A | 1500 W PPP, DO-214AB package, RθJC ≈ 15 °C/W, same VWM/V(BR) tolerance | Meets IEC 61000-4-5 Class 2–3 but lacks DO-160 validation and AEC-Q101 qualification | Use where aerospace certification is not required but higher energy handling than SMBJ is needed. |
Compared with SMBJ75A and SMCJ75A, the MPLAD36KP75A provides 24× and 24× higher peak pulse power respectively, certified AEC-Q101 reliability, and documented DO-160F compliance - making it the sole option for flight-critical or high-reliability automotive power rail protection.
Availability
MPLAD36KP75A is available at Aetrix Electronics and suitable for aerospace power distribution, automotive alternator output protection, and industrial motor drive inputs requiring stable component supply across extended production lifecycles.
Supply support for MPLAD36KP75A 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 Corporation (now part of Microchip Technology) designs high-reliability analog, mixed-signal, and power semiconductors for aerospace, defense, communications, and industrial markets.
The MPLAD36KP75A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump compliance in mission-critical power systems.
FAQ
What is the clamping voltage of the MPLAD36KP75A under standard test conditions?
The MPLAD36KP75A has a maximum clamping voltage (VC) of 121 V when subjected to its rated peak pulse current of 298 A using the 10/1000 μs waveform. This value is measured at 25°C and defines the upper voltage limit imposed on protected circuitry during surge events. The actual clamping performance remains stable across temperature due to the device's low V(BR) temperature coefficient of ±0.09 %/°C.
Is the MPLAD36KP75A qualified for automotive applications?
Yes, the MPLAD36KP75A is AEC-Q101 qualified, confirming its suitability for automotive underhood environments. It meets stress test requirements for temperature cycling, humidity, mechanical shock, and surge robustness. Its 75 V VWM and 121 V clamping align with ISO 7637-2 Pulse 5a/b load dump profiles, and its thermal design supports repeated surge events common in alternator-regulated 24 V systems.
Does the MPLAD36KP75A require special PCB layout considerations?
Yes, the MPLAD36KP75A requires adherence to the manufacturer's recommended pad layout to achieve specified thermal and electrical performance. Its metal base cathode must be soldered to a minimum 25 cm² copper pour (2 oz thickness) or attached to an external heatsink to maintain RθJC = 1.0 °C/W. Trace inductance between the device and protected node must be minimized - short, wide traces are essential to preserve sub-100 ps response time.
Can the MPLAD36KP75A be used for bidirectional surge protection?
No, the MPLAD36KP75A is unidirectional. Its cathode is the metal base and anode is the top surface terminal, allowing conduction only from anode to cathode. For bidirectional protection, the equivalent part is MPLAD36KP75CA, which uses center-tap construction and symmetric breakdown behavior. Substituting MPLAD36KP75A in a bidirectional circuit will result in forward conduction during negative transients and potential failure.
What certifications does the MPLAD36KP75A meet for aerospace use?
The MPLAD36KP75A is validated for RTCA DO-160F Section 22 multi-stroke lightning testing, including Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 up to 75 V VWM. It also supports IEC 61000-4-5 Class 4 secondary lightning protection with 42 Ω source impedance. Optional MIL-PRF-19500 upscreening is available for enhanced lot traceability and reliability screening.
MPLAD36KP75A 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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 298A
- 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
MPLAD36KP75A FAQ
1.How can I place an order for MPLAD36KP75A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP75A 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 MPLAD36KP75A reliable?
The price and inventory of MPLAD36KP75A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP75A is usually 5 days.
3.What payment methods are accepted for MPLAD36KP75A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP75A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP75A?
MPLAD36KP75A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP75A 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 MPLAD36KP75A?
For technical support, including MPLAD36KP75A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP75A requirements.
6.How does Aetrix verify that MPLAD36KP75A is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP75A 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 MPLAD36KP75A meets industry standards.
7.What is the process for return or replacement of MPLAD36KP75A?
All MPLAD36KP75A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP75A, 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 MPLAD36KP75A part is unused and in its original packaging.
Return procedure for MPLAD36KP75A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP75A Tags
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