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Microchip Technology MPLAD18KP22AE3
- Part No.:
- MPLAD18KP22AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP22AE3.pdf
- Description:
- TVS DIODE 22VWM 35.5VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:9,527
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Product details
Overview
MPLAD18KP22AE3 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 transients to ≤35.5 V at 508 A, and features a 22 V reverse standoff voltage (VWM), 24.4–26.9 V breakdown voltage (V(BR)), and 0.7 °C/W junction-to-case thermal resistance.
For engineers reviewing the MPLAD18KP22AE3 datasheet, MPLAD18KP22AE3 pinout, MPLAD18KP22AE3 application, or MPLAD18KP22AE3 equivalent, key selection criteria include its DO-160F Waveform 4 Level 4 compliance, IEC 61000-4-5 Class 1–5 secondary lightning protection capability with 42 Ω source impedance, and suitability for high-reliability board-level protection where low-profile SMT mounting and traceable lot screening are required.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, activating above its 22 V standoff threshold to divert surge current away from sensitive components. Its silicon avalanche structure ensures sub-100 ps response time and stable clamping performance under multi-stroke lightning conditions per RTCA DO-160 Section 22.
The device uses a thermally optimized metal-base package with void-free epoxy molding (UL94V-0) and tin-lead or RoHS-compliant matte-tin plating. Thermal resistance of 0.7 °C/W (junction-to-case) enables effective heat transfer to PCB copper pads or external heatsinks when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 18,000 W - sustains full-rated surge energy without degradation in single-event or low-duty-cycle applications |
| Reverse Standoff Voltage (VWM) | 22 V - maximum continuous DC or peak AC voltage the device blocks without conduction |
| Breakdown Voltage (V(BR)) | 24.4–26.9 V @ I(BR) - precise avalanche onset range enabling predictable turn-on margin above VWM |
| Max Clamping Voltage (VC) | 35.5 V @ 508 A - limits downstream voltage stress during worst-case 10/1000 μs surges |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat extraction to PCB copper or heatsink, critical for repeated surge duty |
| Standby Current (ID) | 10 μA @ 22 V - negligible leakage ensures no system power drain or signal integrity impact |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack or baking required prior to reflow soldering |
Pinout & Package
Package: Surface-mount PLAD (Power Leadless Array Device) with metal base cathode termination. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈ 1 g. Cathode is the metal base (bottom side); anode is top-side metallization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary heat path and high-current return node; must be soldered to large copper pour for thermal and electrical performance |
| Top-Side Metallization | Anode | Input connection point for protected line; requires controlled-impedance routing and minimal trace inductance |
Key Features
| Feature | Design Value |
|---|---|
| DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin-injection transients up to 25 °C - meets aircraft avionics EMI immunity requirements |
| IEC 61000-4-5 Class 1–5 support (42 Ω source) | Enables single-device secondary lightning protection across all severity classes without external impedance matching |
| AEC-Q101 qualified | Qualified for automotive powertrain and chassis applications requiring robust surge immunity and long-term reliability |
| 3σ lot norm screening on ID | Ensures consistent low-leakage behavior across production lots - critical for battery-powered or high-impedance sensing circuits |
| RoHS-compliant e3 marking | Meets global environmental regulations with annealed matte-tin plating compatible with standard Pb-free reflow profiles |
Applications
| Aircraft Avionics Power Input | Automotive Load Dump Protection |
|---|---|
Use Scenario: Protecting 28 V DC power inputs of flight control computers and navigation radios against induced lightning transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed directly at connector entry point to shunt surge current to chassis ground. Use Value: Achieves Level 4 pin-injection immunity (Waveform 4) and Class 5 lightning protection (42 Ω) without additional series impedance or filtering components. | Use Scenario: Safeguarding engine control unit (ECU) power rails during alternator load dump events (ISO 7637-2 Pulse 5a/b). IC Role / Device Role / Timing Role: Primary clamping element absorbing up to 18 kW surge energy while limiting rail voltage to ≤35.5 V. Use Value: Prevents latch-up or destruction of 40 V-rated microcontrollers and CAN transceivers during 120 V/200 ms transients. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: Protecting 24–48 V DC bus lines in variable-frequency drives from switching-induced transients and inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected TVS suppressing repetitive 10/1000 μs surges with <100 ps response to prevent MOSFET gate oxide damage. Use Value: Maintains clamping voltage below 35.5 V even at 508 A peak, ensuring IGBT gate drivers remain within safe operating area. | Use Scenario: Securing 24 V signaling lines in train control systems against EFT bursts (IEC 61000-4-4) and lightning-induced surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: Bidirectional-capable variant (MPLAD18KP22CA) used for differential pair protection; unidirectional MPLAD18KP22AE3 applied to single-ended supply rails. Use Value: Provides certified Class 4 lightning protection with 2 Ω source impedance - meeting EN 50121-4 for rolling stock EMC compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A | 600 W PPP rating, 300 A IPP max, SMB package with RθJA = 40 °C/W (no metal base) | Limited to lower-energy surges; unsuitable for DO-160F Level 4 or IEC 61000-4-5 Class 4+ | Select only for cost-sensitive consumer-grade designs with <1 kA surge exposure and no aerospace/automotive qualification needs. |
| SMCJ22A | 1500 W PPP, 65.5 V VC @ 24.3 A, SMC package, RθJA = 25 °C/W | Insufficient clamping margin for 28 V systems under high-current surges; fails DO-160F Waveform 4 testing | Use where PCB space allows larger SMC footprint and application requires only basic IEC 61000-4-2/4-4 protection. |
Compared with SMBJ22A and SMCJ22A, the MPLAD18KP22AE3 delivers 30× higher peak pulse power, metal-base thermal conduction for sustained multi-stroke operation, and certified compliance with aviation and automotive surge standards - making it the only viable option for mission-critical 28 V DC power protection where failure is not acceptable.
Availability
MPLAD18KP22AE3 is available at Aetrix Electronics and suitable for aircraft avionics, automotive ECU power management, and industrial motor drive DC bus protection requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for MPLAD18KP22AE3 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 ICs for aerospace, defense, and industrial markets.
The MPLAD family was engineered specifically for high-power, surface-mount transient suppression in safety-critical platforms where DO-160, ISO 7637, and IEC 61000-4-x compliance are mandatory - emphasizing thermal robustness, lot traceability, and multi-stroke endurance.
FAQ
What is the clamping voltage of MPLAD18KP22AE3 at its rated peak pulse current?
The MPLAD18KP22AE3 has a maximum clamping voltage (VC) of 35.5 V at 508 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is guaranteed per datasheet Figure 3 and ensures protected circuits remain below critical overvoltage thresholds during standardized surge events. The MPLAD18KP22AE3 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C) when properly mounted.
Is MPLAD18KP22AE3 compliant with automotive qualification standards?
Yes, the MPLAD18KP22AE3 is AEC-Q101 qualified for discrete semiconductors, confirming its reliability for automotive powertrain and chassis applications. It meets ISO 7637-2 Pulse 5a/b load dump requirements and supports EFT (IEC 61000-4-4) and ESD (IEC 61000-4-2) immunity. The MPLAD18KP22AE3 also undergoes 3σ lot norm screening on standby current (ID), ensuring consistent low-leakage behavior across production batches.
Does MPLAD18KP22AE3 require moisture sensitivity handling before reflow?
No, the MPLAD18KP22AE3 is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions without dry packing or baking. This eliminates pre-reflow bake cycles and simplifies manufacturing flow. The MPLAD18KP22AE3's void-free UL94V-0 epoxy body and matte-tin plating ensure robust solderability at 260 °C for 10 seconds per MIL-STD-750 Method 2026.
How does the metal base of MPLAD18KP22AE3 improve thermal performance?
The metal base of the MPLAD18KP22AE3 serves as both the cathode terminal and primary thermal conduction path, achieving a junction-to-case thermal resistance of just 0.7 °C/W. When soldered to a minimum 10 cm² copper pour on FR4, it enables efficient heat dissipation during repetitive surges. This design prevents thermal runaway and extends device life far beyond plastic-packaged alternatives like SMBJ or SMCJ series, which rely solely on PCB traces for heat removal.
Can MPLAD18KP22AE3 be used for bidirectional transient protection?
No - the MPLAD18KP22AE3 is a unidirectional TVS diode, with polarity marked by the metal base (cathode). For bidirectional protection, the functionally equivalent part is MPLAD18KP22CA, which uses a center-tap configuration and identical power ratings. Substituting MPLAD18KP22AE3 in a bidirectional application would result in forward conduction during negative transients and potential device failure. Always verify polarity alignment in schematic capture and layout for the MPLAD18KP22AE3.
MPLAD18KP22AE3 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):
- 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
MPLAD18KP22AE3 FAQ
1.How can I place an order for MPLAD18KP22AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP22AE3 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 MPLAD18KP22AE3 reliable?
The price and inventory of MPLAD18KP22AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP22AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP22AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP22AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP22AE3?
MPLAD18KP22AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP22AE3 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 MPLAD18KP22AE3?
For technical support, including MPLAD18KP22AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP22AE3 requirements.
6.How does Aetrix verify that MPLAD18KP22AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP22AE3 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 MPLAD18KP22AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP22AE3?
All MPLAD18KP22AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP22AE3, 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 MPLAD18KP22AE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP22AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP22AE3 Tags
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