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Microchip Technology MPLAD18KP11AE3
- Part No.:
- MPLAD18KP11AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP11AE3.pdf
- Description:
- TVS DIODE 11VWM 18.2VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:9,404
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Product details
Overview
MPLAD18KP11AE3 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 ≤18.2 V under 989 A peak impulse current, and features a 11 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (12.2–13.5 V). It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection for Waveform 4.
For engineers reviewing the MPLAD18KP11AE3 datasheet, MPLAD18KP11AE3 pinout, MPLAD18KP11AE3 application, or MPLAD18KP11AE3 equivalent, this device is selected for lightning robustness in avionics power rails, load-dump immunity in 12 V vehicle ECUs, and secondary IEC 61000-4-5 Class 1–5 protection with 42 Ω source impedance - requiring precise VWM margining, thermal derating awareness, and cathode-side PCB layout alignment.
Technical Context
This TVS operates as a silicon avalanche diode with controlled breakdown behavior, optimized for low clamping ratio (VC/V(BR) ≈ 1.43) and sub-100 ps response time. Its metal-base package enables direct thermal coupling to heatsinks, achieving RθJC = 0.7 °C/W and supporting high-repetition surges at ≤0.05% duty factor when mounted per recommended FR4 pad layout.
It complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (lightning) across multiple source impedances (2 Ω, 12 Ω, 42 Ω), and is rated for -55°C to +150°C junction operation with moisture sensitivity level 1 (no dry pack required).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 18,000 W - sustains multi-stroke lightning transients without degradation under defined thermal conditions |
| Reverse Standoff Voltage (VWM) | 11 V - maximum continuous DC or peak AC voltage before clamping initiates; sets minimum system operating margin |
| Breakdown Voltage (V(BR)) | 12.2–13.5 V @ I(BR) - defines onset of avalanche conduction; used to verify VWM selection compliance |
| Max Clamping Voltage (VC) | 18.2 V @ 989 A - limits downstream voltage stress during worst-case surge; critical for MOSFET gate and IC input protection |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to external heatsink; essential for sustained surge duty cycling |
| Standby Current (ID) | ≤10 μA @ 11 V - ensures negligible leakage in always-on 12 V rail monitoring circuits |
| Temperature Coefficient (αV(BR)) | +10 mV/°C - quantifies V(BR) drift over temperature; used to validate clamping margin at +125°C |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anode Down) with metal base cathode terminal. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ~1 g. Cathode is the exposed metal base (bottom side); anode is top-side metallization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Metal Base) | High-current surge return path | Must be soldered to large copper pour or heatsink; primary thermal and current conduction interface |
| Anode (Top Metallization) | Surge input node | Connected to protected line (e.g., battery feed); requires short, low-inductance trace routing |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW surge rating with 10/1000 μs waveform | Validated for RTCA DO-160 Section 22 multi-stroke lightning testing in aircraft power distribution |
| Low-profile thermally enhanced PLAD package | RθJC = 0.7 °C/W enables >71 W steady-state dissipation at TC = 100°C without external heatsink |
| AEC-Q101 qualification | Qualified for automotive under-hood applications including 12 V load dump (ISO 7637-2 Pulse 5a/b) |
| IEC 61000-4-5 Class 1–5 compliance (42 Ω source) | Supports secondary lightning protection in industrial PLC I/O modules and telecom power supplies |
| RoHS-compliant e3 matte-tin plating | Meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity; no bake required prior to reflow |
Applications
| Aerospace Power Distribution | Automotive Engine Control Unit |
|---|---|
Use Scenario: Protection of 28 V DC bus in flight control actuator power supplies against induced lightning transients per DO-160F Waveform 4. IC Role / Device Role / Timing Role: Primary surge shunt element placed directly at connector entry point; clamps within <100 ps to limit voltage to <18.2 V. Use Value: Enables compliance with DO-160F Level 4 without additional series impedance or filtering, preserving signal integrity in safety-critical servo drives. |
Use Scenario: Load-dump suppression on 12 V battery-fed ECU microcontroller power rail after alternator disconnection. IC Role / Device Role / Timing Role: Unidirectional TVS connected between battery rail and ground; absorbs 120 V/400 ms pulses per ISO 7637-2 Pulse 5a. Use Value: Prevents latch-up and permanent damage to 3.3 V LDOs and CAN transceivers by limiting rail voltage to ≤18.2 V during 100+ A surge events. |
| Industrial PLC Analog Input Module | Telecom DC Power Feeder |
Use Scenario: Secondary protection on 24 V analog sensor input channel subjected to IEC 61000-4-5 surge coupling via field wiring. IC Role / Device Role / Timing Role: TVS placed after series current-limiting resistor; clamps common-mode surges to protect precision op-amp front-end. Use Value: Maintains <±0.1% measurement accuracy post-surge by limiting voltage excursion to <18.2 V at the amplifier input node. |
Use Scenario: Surge protection on -48 V DC telecom power feed entering remote radio head enclosure. IC Role / Device Role / Timing Role: Unidirectional TVS referenced to -48 V rail; clamps positive-going transients to prevent overvoltage on DC/DC converter inputs. Use Value: Eliminates need for redundant MOV-based protection stages while meeting Telcordia GR-1089 Class 3 requirements with single-device solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A (onsemi) | 600 W PPP rating, SMC package, RθJC ≈ 11 °C/W, VC = 18.2 V @ 32.4 A | Lower energy handling; suitable only for single-stroke IEC 61000-4-2/4-4, not DO-160F or load dump | Select SMBJ11A only for cost-sensitive consumer-grade designs where 18 kW capability is unnecessary. |
| SMCJ11A (Littelfuse) | 1500 W PPP rating, SMC package, RθJC ≈ 10.5 °C/W, VC = 18.2 V @ 83.3 A | Lacks AEC-Q101 qualification and DO-160F validation; not rated for multi-stroke lightning | Choose SMCJ11A for industrial controls with moderate surge exposure but no aviation or automotive certification requirements. |
Compared with SMBJ11A and SMCJ11A, the MPLAD18KP11AE3 provides 30× higher peak pulse power, 15× lower thermal resistance, and certified compliance with RTCA DO-160F and AEC-Q101 - making it the sole option for mission-critical aerospace and automotive power rail protection where multi-event survivability is mandatory.
Availability
MPLAD18KP11AE3 is available at Aetrix Electronics and suitable for aerospace power distribution, automotive engine control units, and industrial PLC analog input modules requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MPLAD18KP11AE3 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, RF, and timing solutions for aerospace, defense, and industrial markets.
The MPLAD18KP11AE3 belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning and load-dump protection in safety-critical power systems where thermal robustness and certification compliance are non-negotiable.
FAQ
What is the clamping voltage of MPLAD18KP11AE3 under maximum rated surge current?
The MPLAD18KP11AE3 has a maximum clamping voltage (VC) of 18.2 V at 989 A peak pulse current (IPP) under the standard 10/1000 μs waveform. This value is measured at 25°C and represents the upper limit of voltage seen by downstream circuitry during worst-case surge events - critical for ensuring compatibility with 24 V-rated components in aerospace and industrial systems.
Is MPLAD18KP11AE3 qualified for automotive applications?
Yes, MPLAD18KP11AE3 is AEC-Q101 qualified and validated for automotive use, including protection against 12 V load-dump transients per ISO 7637-2 Pulse 5a/b. Its 18,000 W surge rating, low RθJC, and -55°C to +150°C operating range make it suitable for under-hood ECU power rail protection where thermal and reliability demands exceed standard TVS diodes.
How does the PLAD package of MPLAD18KP11AE3 improve thermal performance?
The PLAD package of MPLAD18KP11AE3 uses a metal base as the cathode terminal, enabling direct thermal conduction from the die to the PCB copper pour or external heatsink. With a junction-to-case thermal resistance (RθJC) of just 0.7 °C/W, it dissipates heat far more effectively than standard SMC or SMB packages - allowing sustained surge handling and reducing risk of thermal runaway during repetitive transients.
Does MPLAD18KP11AE3 meet RTCA DO-160F lightning test requirements?
Yes, MPLAD18KP11AE3 is explicitly rated for RTCA DO-160F Section 22 multi-stroke lightning testing, including Level 4 pin injection for Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs). Its 18,000 W rating and low clamping voltage ensure compliance without additional external components - a key requirement for avionics power distribution units.
What is the polarity configuration and mounting orientation for MPLAD18KP11AE3?
MPLAD18KP11AE3 is a unidirectional TVS with cathode on the metal base (bottom side) and anode on the top metallization. During PCB layout, the metal base must be soldered to a large thermal pad or heatsink, and the anode trace must be kept short and low-inductance to preserve fast response. Polarity marking is visible on the top surface per Microsemi's standard body marking convention.
MPLAD18KP11AE3 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 989A
- 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
MPLAD18KP11AE3 FAQ
1.How can I place an order for MPLAD18KP11AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP11AE3 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 MPLAD18KP11AE3 reliable?
The price and inventory of MPLAD18KP11AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP11AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP11AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP11AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP11AE3?
MPLAD18KP11AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP11AE3 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 MPLAD18KP11AE3?
For technical support, including MPLAD18KP11AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP11AE3 requirements.
6.How does Aetrix verify that MPLAD18KP11AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP11AE3 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 MPLAD18KP11AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP11AE3?
All MPLAD18KP11AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP11AE3, 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 MPLAD18KP11AE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP11AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP11AE3 Tags
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