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Microchip Technology MPLAD18KP22CAE3
- Part No.:
- MPLAD18KP22CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP22CAE3.pdf
- Description:
- TVS DIODE 22VWM 35.5VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,789
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Product details
Overview
MPLAD18KP22CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps at ≤35.5 V under 508 A peak impulse current, and features a 22 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (24.4–26.9 V). It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection for Waveform 4.
For engineers reviewing the MPLAD18KP22CAE3 datasheet, MPLAD18KP22CAE3 pinout, MPLAD18KP22CAE3 application, or MPLAD18KP22CAE3 equivalent, this device is selected for secondary lightning protection per IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances), ESD/EFT immunity per IEC 61000-4-2/4-4, and multi-stroke lightning compliance in aircraft avionics and vehicle power systems.
Technical Context
This bidirectional TVS uses silicon avalanche diode technology optimized for low clamping ratio and minimal thermal resistance (RθJC = 0.7 °C/W). Its void-free UL94V-0 epoxy package enables direct metal-base heat sinking, supporting stable operation under repetitive surges at ≤0.05% duty factor.
It is characterized for IEC 61000-4-5 Class 1–5 (42 Ω), Class 1–4 (12 Ω), and Class 2–3 (2 Ω) waveforms, and RTCA DO-160F Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 - all validated at 25 °C with temperature derating guidance per MicroNote 132.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains full-rated surge energy without failure in lightning or load-dump events |
| Reverse Standoff Voltage (VWM) | 22 V - maximum continuous DC or peak AC voltage the device blocks before clamping begins |
| Breakdown Voltage (V(BR)) | 24.4–26.9 V @ I(BR) - ensures reliable avalanche conduction onset within specified tolerance band |
| Max Clamping Voltage (VC) | 35.5 V @ 508 A - limits downstream circuit voltage during worst-case surge, protecting 24 V nominal systems |
| Standby Current (ID) | 10 μA @ 22 V - negligible leakage ensures no impact on system quiescent power or signal integrity |
| Thermal Resistance (RθJC) | 0.7 °C/W - enables efficient heat transfer to heatsink, critical for repeated surge handling |
| Junction Temp Range | −55 °C to +150 °C - supports operation in extended environmental conditions including engine bays and avionics bays |
Pinout & Package
The MPLAD18KP22CAE3 uses a surface-mount, metal-base package (PLAD) where the cathode is the exposed metal base (bottom side); anode is the top-side metallization. The device has two terminals: anode and cathode - polarity is symmetric for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top-side metallization) | Surge current entry point (positive polarity) | Connects to protected line; forms symmetrical clamping path with cathode during either polarity transient |
| Cathode (metal base) | Surge current return path / thermal interface | Serves as both electrical terminal and primary heat sink interface; must be soldered to copper pour or heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC or differential lines without polarity sensitivity - essential for data buses and dual-rail sensors |
| 18 kW surge rating | Meets RTCA DO-160 Section 22 multi-stroke lightning requirements for commercial aircraft systems |
| 0.7 °C/W RθJC | Enables >5× higher thermal power density than standard SMD TVS, reducing need for external heatsinking |
| AEC-Q101 qualification | Validated for automotive under-hood applications including alternator load dump and battery transients |
| RoHS-compliant (e3) | Tin-plated terminals ensure lead-free assembly compatibility and long-term solder joint reliability |
Applications
| Aircraft Avionics Protection | Automotive Power Distribution |
|---|---|
Use Scenario: Protecting ARINC 429 data lines and sensor inputs in flight control computers against DO-160F Waveform 4/5A transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry to shunt induced surges before reaching ASICs or FPGAs. Use Value: Enables Level 4 pin injection compliance with ≤35.5 V clamping, preserving signal integrity of 28 V DC-powered avionics subsystems. | Use Scenario: Safeguarding 24 V power rails in commercial vehicle ECUs during alternator load dump events per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary surge suppression element mounted across battery input, coordinated with upstream fusing. Use Value: Withstands 18,000 W pulses while limiting rail voltage to 35.5 V, preventing damage to microcontrollers and CAN transceivers. |
| Industrial Motor Drive Inputs | Railway Signaling Interfaces |
Use Scenario: Shielding PLC analog input modules from switching transients generated by contactors and VFDs in factory automation. IC Role / Device Role / Timing Role: TVS placed at terminal block entry to absorb inductive kickback and RFI-coupled surges. Use Value: Low 10 μA standby current avoids loading precision 4–20 mA loops; 22 V VWM matches common 24 V sensor supply rails. | Use Scenario: Securing Ethernet-over-coax and RS-485 links in wayside signaling equipment exposed to lightning-induced ground potential rise. IC Role / Device Role / Timing Role: Bidirectional protection on differential pairs, referenced to chassis ground via metal base. Use Value: Meets IEC 61000-4-5 Class 4 (42 Ω) with 35.5 V clamping, ensuring interoperability with EN 50121-4 EMC requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA | 600 W PPP rating, 300 A IPP, larger RθJA (85 °C/W), no AEC-Q101 or DO-160 qualification | Limited to consumer/industrial single-stroke surges; unsuitable for aviation or automotive multi-stroke requirements | Select only for cost-sensitive, non-safety-critical 24 V systems with infrequent transients |
| SMCJ22CA | 1500 W PPP, 100 A IPP, RθJC ≈ 2.5 °C/W, lacks MIL/Microsemi upscreening options | Supports basic IEC 61000-4-5 Class 3 but not DO-160F Level 4 or AEC-Q101 stress profiles | Use where footprint constraints allow larger SMC package and qualification rigor is not required |
Compared with SMBJ22CA and SMCJ22CA, the MPLAD18KP22CAE3 provides 30× and 12× higher peak pulse power respectively, certified AEC-Q101 and DO-160F compliance, and a thermally optimized metal-base package enabling sustained multi-event protection in mission-critical platforms.
Availability
MPLAD18KP22CAE3 is available at Aetrix Electronics and suitable for aircraft avionics, automotive power distribution, and industrial motor drive applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for MPLAD18KP22CAE3 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, radiation-tolerant, and high-power analog/mixed-signal solutions for aerospace, defense, and industrial markets.
The MPLAD series is part of Microsemi's high-power PLAD platform, engineered specifically for multi-stroke lightning protection and automotive load-dump suppression in safety-critical environments where thermal performance and qualification rigor are mandatory.
FAQ
What is the clamping voltage of the MPLAD18KP22CAE3 at its rated peak pulse current?
The MPLAD18KP22CAE3 has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current of 508 A under the standard 10/1000 μs waveform. This value is guaranteed across the operating temperature range and ensures compatible overvoltage protection for 24 V nominal systems without exceeding safe stress limits for downstream ICs.
Is the MPLAD18KP22CAE3 qualified for automotive applications?
Yes, the MPLAD18KP22CAE3 is explicitly qualified to AEC-Q101 for automotive use. It is validated for under-hood environments, including alternator load dump transients (ISO 7637-2 Pulse 5a), and supports thermal cycling, humidity, and mechanical shock testing per the standard - making it suitable for engine control units and battery management systems.
How does the metal base of the MPLAD18KP22CAE3 function electrically and thermally?
The metal base of the MPLAD18KP22CAE3 serves as the cathode terminal and primary thermal interface. Electrically, it completes the bidirectional clamping path; thermally, it provides a low-resistance path (RθJC = 0.7 °C/W) to an external heatsink or PCB copper pour, enabling effective dissipation of 18,000 W surge energy without junction overheating.
Does the MPLAD18KP22CAE3 meet RTCA DO-160F lightning protection requirements?
Yes, the MPLAD18KP22CAE3 is designed and tested to meet RTCA DO-160F Section 22 for multi-stroke lightning, including Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 at 25 °C. Full compliance requires proper PCB layout per the recommended pad design and thermal management as specified in RF01215 Rev B.
What does the "E3" suffix indicate in MPLAD18KP22CAE3?
"E3" denotes RoHS-compliant terminal plating using annealed matte tin per J-STD-020B, with moisture sensitivity level (MSL) 1 - meaning no dry-pack baking is required prior to reflow. This ensures compatibility with lead-free assembly processes and eliminates moisture-related popcorning risks during soldering.
MPLAD18KP22CAE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 508A
- 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
MPLAD18KP22CAE3 FAQ
1.How can I place an order for MPLAD18KP22CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP22CAE3 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 MPLAD18KP22CAE3 reliable?
The price and inventory of MPLAD18KP22CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP22CAE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP22CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP22CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP22CAE3?
MPLAD18KP22CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP22CAE3 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 MPLAD18KP22CAE3?
For technical support, including MPLAD18KP22CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP22CAE3 requirements.
6.How does Aetrix verify that MPLAD18KP22CAE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP22CAE3 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 MPLAD18KP22CAE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP22CAE3?
All MPLAD18KP22CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP22CAE3, 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 MPLAD18KP22CAE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP22CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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