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Microchip Technology MPLAD18KP14AE3
- Part No.:
- MPLAD18KP14AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP14AE3.pdf
- Description:
- TVS DIODE 14VWM 23.2VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,515
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Product details
Overview
MPLAD18KP14AE3 from Microsemi is a surface-mount unidirectional transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 14 V reverse standoff voltage (VWM), clamps to ≤23.2 V at 776 A peak impulse current (IPP), and exhibits 0.7 °C/W junction-to-case thermal resistance - enabling robust secondary lightning protection per IEC 61000-4-5 and RTCA DO-160F Waveform 4 Level 4.
For engineers reviewing the MPLAD18KP14AE3 datasheet, MPLAD18KP14AE3 pinout, MPLAD18KP14AE3 application, or MPLAD18KP14AE3 equivalent, this device is selected for high-reliability DC bus protection in avionics power distribution units, engine control modules, and industrial motor drives where multi-stroke surge resilience and low thermal resistance are critical.
Technical Context
This TVS diode operates as a clamping-type overvoltage protector with avalanche breakdown behavior. Its unidirectional polarity defines cathode-terminal conduction during positive transients, and its metal-base package design provides direct thermal path to PCB copper or heatsink. The device meets AEC-Q101 stress testing and supports MIL-PRF-19500 upscreening options.
It is rated for 14 V working standoff (VWM), 15.6–17.2 V breakdown (V(BR)) at 1 mA, and achieves <100 ps response time from 0 V to V(BR). Clamping performance is specified at 776 A IPP with VC ≤23.2 V, and steady-state power dissipation is 2.5 W at 25°C ambient or 71 W at 100°C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains multi-stroke lightning surges without degradation |
| Reverse Standoff Voltage (VWM) | 14 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Clamping Voltage (VC) | ≤23.2 V @ 776 A - limits downstream IC voltage stress during worst-case surge |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to PCB copper pour or heatsink |
| Breakdown Voltage (V(BR)) | 15.6–17.2 V @ 1 mA - defines precise avalanche onset threshold for predictable clamping |
| Standby Current (ID) | ≤10 μA @ 14 V - ensures negligible leakage in standby power circuits |
| Temperature Coefficient (αV(BR)) | +13 mV/°C - quantifies V(BR) drift across operating temperature range |
Pinout & Package
The MPLAD18KP14AE3 uses a surface-mount plastic package with metal baseplate (cathode terminal), void-free UL94V-0 epoxy body, and matte-tin RoHS-compliant plating. Polarity is unidirectional: cathode is the metal base (bottom side); anode is the top-side metallized pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top-side pad) | Positive surge return path | Connected to protected line; conducts during positive transients when cathode is grounded |
| Cathode (metal base) | Reference/ground node | Must be soldered to large copper area or heatsink for thermal and electrical reference |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW peak pulse rating | Enables compliance with RTCA DO-160 Section 22 multi-stroke lightning testing |
| 0.7 °C/W RθJC | Reduces thermal derating impact - maintains full PPP rating with minimal heatsinking |
| AEC-Q101 qualified | Validated for automotive under-hood environments including temperature cycling and humidity exposure |
| RoHS-compliant e3 marking | Meets EU Directive 2011/65/EU with annealed matte-tin plating compatible with lead-free reflow |
| IEC 61000-4-5 Class 4 support (42 Ω source) | Provides secondary lightning protection for 24 V and 28 V DC aircraft power buses |
Applications
| Avionics Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC main bus in commercial aircraft power management units against induced lightning transients. IC Role / Device Role / Timing Role: Primary clamping element placed between bus rail and ground plane, triggered within <100 ps of surge onset. Use Value: Withstands repeated 18 kW surges per RTCA DO-160F Waveform 4 Level 4 while maintaining VWM = 14 V compatibility with upstream DC-DC converter output. | Use Scenario: Safeguarding microcontroller supply inputs in diesel engine control modules exposed to load dump events. IC Role / Device Role / Timing Role: Unidirectional TVS connected anode-to-rail, cathode-to-ground, clamping transients above 14 V. Use Value: Delivers 776 A IPP capacity and 23.2 V clamping to keep MCU VCC below absolute maximum rating during ISO 7637-2 Pulse 5a events. |
| Industrial Motor Drive DC Link | Railway Signaling Power Supply |
Use Scenario: Secondary surge suppression on 48 V DC link of variable-frequency drive front-end rectifier. IC Role / Device Role / Timing Role: Parallel-mounted TVS absorbing switching-induced transients and EFT bursts per IEC 61000-4-4. Use Value: 18,000 W PPP rating prevents thermal runaway during repetitive 10/1000 μs surges common in regenerative braking scenarios. | Use Scenario: Protecting 110 V DC signaling interface in European railway trackside cabinets against induced surges from nearby traction currents. IC Role / Device Role / Timing Role: Standoff-rated TVS placed at input filter stage to limit transient energy entering isolated DC-DC converters. Use Value: 14 V VWM allows cascaded protection architecture with upstream 100 V MOV, enabling staged energy absorption per EN 50121-4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14A | 600 W PPP rating, 5.0 mm × 4.5 mm SMB package, RθJA = 40 °C/W, no AEC-Q101 qualification | Rated for consumer/industrial use only; insufficient for DO-160F multi-stroke or automotive load dump | Select only for cost-sensitive non-automotive/non-aerospace designs with single-event surge requirements ≤600 W |
| SMCJ14A | 1500 W PPP rating, 7.1 mm × 6.2 mm SMC package, RθJA = 25 °C/W, AEC-Q101 qualified | Supports automotive but lacks 18 kW capability and DO-160F Waveform 4 Level 4 validation | Choose when system-level testing confirms 1500 W suffices and board space permits larger SMC footprint |
Compared with SMBJ14A and SMCJ14A, the MPLAD18KP14AE3 uniquely delivers 12× higher peak pulse power in a surface-mount form factor while maintaining AEC-Q101 qualification and DO-160F compliance - making it irreplaceable for high-energy aerospace and heavy-duty automotive surge protection where thermal management and multi-stroke endurance are design-critical.
Availability
MPLAD18KP14AE3 is available at Aetrix Electronics and suitable for avionics power distribution, automotive engine control units, and industrial motor drive DC link protection requiring stable component supply across extended production lifecycles.
Supply support for MPLAD18KP14AE3 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) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The MPLAD18KP14AE3 belongs to Microsemi's PLAD family of high-power surface-mount TVS diodes, engineered specifically for multi-stroke lightning protection and automotive load dump immunity in mission-critical power systems.
FAQ
What is the clamping voltage of MPLAD18KP14AE3 at its rated peak pulse current?
The MPLAD18KP14AE3 has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak impulse current (IPP) of 776 A under 10/1000 μs waveform conditions. This value is measured at 25°C and ensures downstream circuitry remains within safe operating voltage limits during surge events. The MPLAD18KP14AE3 maintains this clamping performance across its specified temperature range with defined derating curves.
Is MPLAD18KP14AE3 compliant with automotive reliability standards?
Yes, the MPLAD18KP14AE3 is tested and qualified to AEC-Q101 for stress testing including temperature cycling, humidity bias, and mechanical shock. It is designed for under-hood automotive applications such as engine control units and battery management systems. The MPLAD18KP14AE3 also supports optional MIL-PRF-19500 upscreening for enhanced reliability in harsh environments beyond standard automotive requirements.
How does the thermal design of MPLAD18KP14AE3 differ from standard TVS diodes?
The MPLAD18KP14AE3 features a metal-base package with 0.7 °C/W junction-to-case thermal resistance - significantly lower than typical surface-mount TVS devices (often >10 °C/W). This enables direct thermal coupling to PCB copper or external heatsinks, allowing the MPLAD18KP14AE3 to sustain its full 18,000 W peak pulse rating without thermal runaway. Standard TVS diodes lack this low-RθJC path and require substantial board-area copper for equivalent thermal performance.
Can MPLAD18KP14AE3 be used for bidirectional surge protection?
No, the MPLAD18KP14AE3 is a unidirectional TVS diode, indicated by the "A" suffix (versus "CA" for bidirectional variants). Its cathode is the metal baseplate, and it conducts only during positive transients relative to that reference. For bidirectional protection, the equivalent part is MPLAD18KP14CA, which provides symmetrical clamping for both polarities and is marked with "CA" in the nomenclature.
What packaging options are available for MPLAD18KP14AE3?
The MPLAD18KP14AE3 is supplied in bulk or tape-and-reel format. Tape-and-reel packaging follows EIA-481-B standard and requires adding the "TR" suffix to the part number (e.g., MPLAD18KP14AE3TR). The device weighs approximately 1 gram and uses RoHS-compliant matte-tin plating compatible with standard lead-free reflow profiles. Custom packaging configurations are available upon request through Aetrix Electronics.
MPLAD18KP14AE3 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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 776A
- Power - Peak Pulse:
- 18000W (18kW)
- 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
MPLAD18KP14AE3 FAQ
1.How can I place an order for MPLAD18KP14AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP14AE3 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 MPLAD18KP14AE3 reliable?
The price and inventory of MPLAD18KP14AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP14AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP14AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP14AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP14AE3?
MPLAD18KP14AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP14AE3 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 MPLAD18KP14AE3?
For technical support, including MPLAD18KP14AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP14AE3 requirements.
6.How does Aetrix verify that MPLAD18KP14AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP14AE3 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 MPLAD18KP14AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP14AE3?
All MPLAD18KP14AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP14AE3, 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 MPLAD18KP14AE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP14AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP14AE3 Tags
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