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Microchip Technology MPLAD18KP70AE3
- Part No.:
- MPLAD18KP70AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP70AE3.pdf
- Description:
- TVS DIODE 7VWM 12VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,034
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Product details
Overview
MPLAD18KP70AE3 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 18,000 W peak pulse power at 10/1000 μs, clamps at ≤113 V under 1000 A peak impulse current, and features a 70 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (77.8–86.0 V). Its low-profile thermally optimized package enables robust lightning protection per RTCA DO-160 Section 22 and secondary surge suppression per IEC 61000-4-5.
For engineers reviewing the MPLAD18KP70AE3 datasheet, MPLAD18KP70AE3 pinout, MPLAD18KP70AE3 application, or MPLAD18KP70AE3 equivalent, this device is selected for high-reliability DC bus protection where multi-stroke lightning immunity, low thermal resistance (RθJC = 0.7 °C/W), and RoHS-compliant solderability are critical - especially in avionics power distribution, vehicle ECU inputs, and industrial motor drive DC links.
Technical Context
This TVS diode operates as a clamping-type overvoltage protector, leveraging avalanche breakdown to divert transients away from sensitive downstream circuitry. Its metal-base cathode construction provides direct thermal path to PCB copper, enabling sustained energy handling without thermal runaway under repetitive 0.05% duty-cycle surges.
It meets AEC-Q101 stress testing requirements and supports MIL-PRF-19500 upscreening options. The device exhibits a +0.084 %/°C temperature coefficient of breakdown voltage and maintains <100 ps response time from 0 V to V(BR) min, ensuring sub-nanosecond turn-on for fast-rising transients like ESD and pin injection events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains full-rated surge energy without degradation in standard FR4 mounting |
| Reverse Standoff Voltage (VWM) | 70 V - maximum continuous DC or peak AC voltage before clamping initiates; matches 48–60 V nominal bus systems |
| Breakdown Voltage (V(BR)) | 77.8–86.0 V @ I(BR) - tight 5% tolerance ensures predictable turn-on across temperature and lot variance |
| Max Clamping Voltage (VC) | 113 V @ 1000 A - limits downstream voltage stress during worst-case lightning surge (IEC 61000-4-5, 42 Ω source) |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to heatsink or large copper pour, critical for multi-pulse reliability |
| Standby Leakage Current | 10 μA @ 70 V - negligible power loss in standby, suitable for always-on 24/48 V control circuits |
| Response Time | <100 ps - triggers before most semiconductor switching transients fully develop, protecting gate drivers and ADCs |
Pinout & Package
Package: Surface-mount PLAD (Power Leadless Array Device) with metal base cathode termination. Void-free UL94V-0 epoxy body (12.32 × 10.54 × 5.33 mm max), tin-lead or RoHS-compliant matte-tin plating, polarity marked by cathode on bottom metal surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Surface Pad) | Transient current entry point | Connected to protected line (e.g., battery feed); carries full surge current into device |
| Cathode (Metal Base) | Transient current return path | Soldered directly to PCB ground plane or heatsink; primary thermal conduction path and low-inductance return |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW surge rating with thermal optimization | Enables single-device protection for 24/48 V DC bus against RTCA DO-160 Level 4/5 lightning waveforms without parallel stacking |
| RoHS-compliant e3 marking | Meets global environmental compliance without derating or process change; compatible with lead-free reflow (260°C, 10 s) |
| Traceable wafer and assembly lots | Supports AS9100 and MIL-STD-883 traceability requirements for aerospace and defense BOMs |
| IEC 61000-4-2/4-4/4-5 certified | Validated for system-level ESD (±8 kV contact), EFT (±2 kV), and surge (42 Ω, Class 4) immunity without external filtering |
| Moisture sensitivity Level 1 | No dry-pack or baking required prior to SMT assembly - reduces manufacturing overhead and moisture-related defects |
Applications
| Aerospace Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: Protection of 28 V DC main bus in commercial aircraft avionics bays against multi-stroke lightning-induced surges per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Primary clamping TVS placed at bus entry point; absorbs >95% of 18 kW surge energy before downstream converters see overvoltage. Use Value: Eliminates need for bulky hybrid protectors; achieves Level 5 pin-injection immunity (Waveform 4, 6.4/69 μs) with single-device solution. |
Use Scenario: Guarding engine control unit (ECU) power input against 12 V battery load dump transients (ISO 7637-2 Pulse 5a, up to 120 V, 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS shunting excess energy to chassis ground during alternator field collapse; clamps within 100 ps to prevent MCU reset or sensor latch-up. Use Value: Withstands ≥1000 surge cycles at 0.05% duty factor; RθJC = 0.7 °C/W prevents thermal accumulation during repeated cold-crank events. |
| Industrial Motor Drive DC Link | Railway Signaling Interface |
Use Scenario: Safeguarding IGBT gate driver supply rails in variable-frequency drives exposed to inductive kickback and grid-switching transients. IC Role / Device Role / Timing Role: Fast-clamping TVS placed between isolated DC/DC output and gate driver IC; clamps to ≤113 V before driver overvoltage threshold (typically 120 V abs max). Use Value: Sub-100 ps response prevents false triggering of desaturation detection; 10 μA leakage avoids bias current errors in precision level-shift circuits. |
Use Scenario: Protecting 72 V signaling lines in European railway interlocking systems against induced surges from nearby traction currents (EN 50121-4). IC Role / Device Role / Timing Role: Bidirectional-capable variant (MPLAD18KP70CA) used in differential pair protection; unidirectional MPLAD18KP70AE3 applied to single-ended trackside sensor feeds. Use Value: Validated for IEC 61000-4-5 Class 4 (42 Ω source) at 72 V operating margin; metal-base thermal path sustains operation at +70°C ambient without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ70A | Lower PPP (400 W), smaller SMA package, RθJA = 50 °C/W (no metal base), VWM = 70 V, VC = 115 V @ 32.3 A | Designed for board-level ESD/EFT only; insufficient for multi-stroke lightning or load dump | Select when cost-sensitive consumer-grade protection suffices and thermal mass is limited |
| Vishay V18MLA0705G | MLV-based (not TVS diode); 18 kW rating but slower response (~ns), higher clamping (≥130 V), no AEC-Q101 qualification | Used in non-safety-critical telecom power; lacks RTCA DO-160 validation and lot traceability | Select only for non-aerospace industrial use where nanosecond response and aerospace certification are not required |
Compared with SMAJ70A and V18MLA0705G, the MPLAD18KP70AE3 uniquely combines 18 kW surge capacity, sub-100 ps response, AEC-Q101 qualification, and RTCA DO-160 Level 5 validation - making it the only option for high-reliability aerospace and automotive power rail protection where thermal management, multi-stroke endurance, and certification compliance are mandatory.
Availability
MPLAD18KP70AE3 is available at Aetrix Electronics and suitable for aerospace power distribution, automotive ECU protection, and industrial motor drive DC link applications requiring stable component supply, long-term lifecycle support, and certified surge immunity.
Supply support for MPLAD18KP70AE3 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 power management solutions for aerospace, defense, and industrial markets.
The MPLAD series was developed specifically for high-energy transient suppression in safety-critical platforms - emphasizing thermal robustness, multi-stroke endurance, and compliance with RTCA DO-160, IEC 61000-4-5, and AEC-Q101 standards.
FAQ
What is the maximum clamping voltage of the MPLAD18KP70AE3 at its rated peak pulse current?
The MPLAD18KP70AE3 has a maximum clamping voltage (VC) of 113 V at 1000 A peak pulse current under 10/1000 μs waveform conditions. This value is guaranteed across temperature and lot variation, ensuring downstream components remain below their absolute maximum voltage ratings during worst-case surge events such as lightning-induced transients or automotive load dump.
Is the MPLAD18KP70AE3 qualified for automotive applications per AEC-Q101?
Yes, the MPLAD18KP70AE3 is tested and qualified to AEC-Q101 standards for discrete semiconductors. It undergoes stress testing including HTRB, HTGB, TST, and surge testing per the specification - confirming suitability for under-hood and powertrain applications where reliability under thermal cycling, humidity, and high-energy transients is essential.
How does the metal base cathode of the MPLAD18KP70AE3 improve thermal performance?
The metal base cathode of the MPLAD18KP70AE3 serves as both the electrical return path and primary thermal conduction path, achieving a junction-to-case thermal resistance of just 0.7 °C/W. When soldered to a large copper pour or heatsink, this design minimizes thermal impedance, preventing cumulative heating during repetitive surges - a key requirement for RTCA DO-160 multi-stroke compliance.
Can the MPLAD18KP70AE3 be used for bidirectional surge protection?
No - the MPLAD18KP70AE3 is unidirectional. For bidirectional protection, the functionally equivalent part is MPLAD18KP70CA (with 'CA' suffix). The 'A' suffix denotes unidirectional polarity, and the cathode is located on the metal base; using the unidirectional version in AC or differential signal paths risks forward conduction and failure.
What is the moisture sensitivity level (MSL) and reflow profile for MPLAD18KP70AE3?
The MPLAD18KP70AE3 is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and requires no dry packing or baking prior to reflow. It supports standard lead-free reflow with peak temperature of 260°C for 10 seconds, and its matte-tin plating ensures reliable solderability per MIL-STD-750 Method 2026.
MPLAD18KP70AE3 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 1500A (1.5kA)
- 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
MPLAD18KP70AE3 FAQ
1.How can I place an order for MPLAD18KP70AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP70AE3 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 MPLAD18KP70AE3 reliable?
The price and inventory of MPLAD18KP70AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP70AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP70AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP70AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP70AE3?
MPLAD18KP70AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP70AE3 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 MPLAD18KP70AE3?
For technical support, including MPLAD18KP70AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP70AE3 requirements.
6.How does Aetrix verify that MPLAD18KP70AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP70AE3 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 MPLAD18KP70AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP70AE3?
All MPLAD18KP70AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP70AE3, 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 MPLAD18KP70AE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP70AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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