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Microchip Technology MPLAD18KP24AE3
- Part No.:
- MPLAD18KP24AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP24AE3.pdf
- Description:
- TVS DIODE 24VWM 38.9VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,828
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Product details
Overview
MPLAD18KP24AE3 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 ≤38.9 V at 463 A, and features a 24 V reverse standoff voltage (VWM), 26.7–29.5 V breakdown voltage (V(BR)), and 0.7 °C/W junction-to-case thermal resistance.
For engineers reviewing the MPLAD18KP24AE3 datasheet, MPLAD18KP24AE3 pinout, MPLAD18KP24AE3 application, or MPLAD18KP24AE3 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 RoHS-compliant e3 matte-tin plating suitable for lead-free reflow assembly.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry, activating above its 24 V working standoff voltage to divert surge current away from downstream components. Its low RθJC (0.7 °C/W) enables effective heat transfer to a heatsink or PCB copper plane, supporting multi-stroke surge endurance per RTCA DO-160 Section 22.
The device meets AEC-Q101 stress testing requirements and supports MIL-PRF-19500 upscreening options. Its bidirectional counterpart (MPLAD18KP24CAE3) shares identical PPP and VC ratings but differs in polarity configuration and clamping symmetry-critical for AC-coupled or differential signal line protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 24 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Clamping Voltage (VC) | 38.9 V @ 463 A - limits downstream voltage stress during worst-case surge events |
| Breakdown Voltage (V(BR)) | 26.7–29.5 V @ I(BR) - defines precise turn-on threshold for predictable protection timing |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables direct thermal coupling to heatsink for cumulative stroke reliability |
| RoHS Compliance | e3 marking - matte-tin plating compatible with Pb-free soldering processes (260 °C, 10 s) |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack or bake required prior to assembly |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anode Down) with metal base cathode termination. Void-free UL94V-0 epoxy body (12.32 × 10.54 × 5.08 mm), tin-lead or RoHS-compliant matte-tin plating, cathode on bottom metal surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Pad) | Surge Current Entry Point | Connects to protected line; carries full IPP during clamping event |
| Cathode (Metal Base) | Surge Current Return Path | Must be soldered to large copper pour or heatsink for thermal and current conduction |
Key Features
| Feature | Design Value |
|---|---|
| DO-160F Waveform 4 Level 4 Compliance | Withstands 6.4/69 μs pin-injection transients up to 25 °C ambient without degradation |
| IEC 61000-4-5 Secondary Lightning Protection | Validated for Class 1–5 with 42 Ω source impedance - covers full aircraft system zones |
| Low Thermal Resistance (RθJC = 0.7 °C/W) | Enables >1000 surge cycles at 0.05% duty factor when mounted per recommended pad layout |
| AEC-Q101 Qualified | Passes accelerated stress tests including HTGB, HTRB, and temperature cycling - suitable for automotive under-hood use |
| 3σ Lot Norm Screening on ID | Ensures standby leakage <10 μA at 24 V across production lots - critical for low-power monitoring circuits |
Applications
| Aircraft Avionics Power Input | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC power input stage of flight control computers exposed to DO-160 Section 22 lightning-induced transients. IC Role / Device Role / Timing Role: Primary parallel clamping device that activates within <100 ps to limit bus voltage to ≤38.9 V during multi-kA surges. Use Value: Prevents latch-up or burnout of downstream DC/DC converters and FPGAs by maintaining rail integrity below 40 V. | Use Scenario: 12 V/24 V battery-fed ECU power rail subjected to ISO 7637-2 Pulse 5a load dump events up to 120 V. IC Role / Device Role / Timing Role: Unidirectional shunt protector placed upstream of LDO regulators and microcontrollers. Use Value: Clamps 120 V transients to 38.9 V within nanoseconds, eliminating need for oversized input capacitors or derated ICs. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: 24 V DC bus in variable-frequency drives where IGBT switching induces repetitive 1–5 kV spikes. IC Role / Device Role / Timing Role: High-reliability transient suppressor mounted directly on bus terminals with thermal pad to chassis ground. Use Value: Absorbs cumulative energy from repeated switching transients while maintaining <0.5 °C/W effective thermal path via metal base. | Use Scenario: 24 V signaling lines in European railway interlocking systems requiring EN 50121-4 immunity to 4 kV surges. IC Role / Device Role / Timing Role: Secondary protection element after gas discharge tube (GDT), providing fast clamping response. Use Value: Reduces residual let-through voltage to <40 V, ensuring safe operation of optocouplers and RS-485 transceivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | 600 W PPP rating, 38.9 V VC @ 12.5 A - 30× lower surge capacity than MPLAD18KP24AE3 | Intended for board-level ESD, not multi-stroke lightning or load dump | Select only for low-energy interfaces where footprint and cost outweigh robustness requirements |
| SMCJ24A | 1500 W PPP rating, 38.9 V VC @ 100 A - 12× lower energy handling than MPLAD18KP24AE3 | Suitable for single-event automotive transients, not DO-160F multi-stroke validation | Choose when AEC-Q101 qualification is needed but full 18 kW surge capability is unnecessary |
Compared with SMBJ24A and SMCJ24A, the MPLAD18KP24AE3 provides 30× and 12× higher peak pulse power respectively, enabling certified compliance with RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 5 - essential for safety-critical aerospace and heavy-duty industrial deployments.
Availability
MPLAD18KP24AE3 is available at Aetrix Electronics and suitable for aircraft avionics, automotive powertrain ECUs, and industrial motor drive systems requiring stable component supply across extended product lifecycles.
Supply support for MPLAD18KP24AE3 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, mixed-signal, and radiation-hardened solutions for aerospace, defense, and industrial markets.
The MPLAD series was developed specifically for high-energy transient suppression in mission-critical platforms where DO-160, IEC 61000-4-5, and AEC-Q101 compliance are mandatory - emphasizing thermal robustness, lot traceability, and multi-stroke endurance.
FAQ
What is the clamping voltage of MPLAD18KP24AE3 at its rated peak pulse current?
The MPLAD18KP24AE3 has a maximum clamping voltage (VC) of 38.9 V at 463 A peak pulse current under 10/1000 μs waveform conditions. This value is measured across the anode and cathode terminals with the device mounted per the recommended pad layout on FR4, ensuring consistent thermal performance and repeatable protection behavior in production systems.
Does MPLAD18KP24AE3 meet AEC-Q101 qualification requirements?
Yes, the MPLAD18KP24AE3 is tested and qualified to AEC-Q101 standards, including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling. This qualification confirms its suitability for automotive under-hood applications such as engine control units and battery management systems where reliability under thermal and electrical stress is critical.
How does the metal base cathode configuration affect PCB layout for MPLAD18KP24AE3?
The cathode of the MPLAD18KP24AE3 is located on the metal base underside, requiring direct soldering to a large copper pour or heatsink for optimal thermal dissipation and current return. The recommended pad layout specifies minimum dimensions (12.32 × 10.54 mm) and thermal vias to maintain RθJC ≤ 0.7 °C/W - improper grounding increases junction temperature and reduces surge endurance.
Is MPLAD18KP24AE3 compliant with RoHS and REACH regulations?
Yes, the MPLAD18KP24AE3 carries the e3 marking, indicating RoHS-compliant matte-tin plating and full compliance with Directive 2011/65/EU. It also meets REACH SVHC requirements with no substances of very high concern above threshold levels, and its moisture sensitivity level is rated IPC/JEDEC J-STD-020B Level 1 - no dry pack or baking is required before assembly.
Can MPLAD18KP24AE3 be used for bidirectional signal line protection?
No - the MPLAD18KP24AE3 is unidirectional and intended for DC power rail protection only. For bidirectional applications such as AC lines or differential data buses, the pin-compatible MPLAD18KP24CAE3 variant must be used. Using the unidirectional MPLAD18KP24AE3 on AC signals risks forward conduction and permanent damage during negative half-cycles.
MPLAD18KP24AE3 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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 463A
- 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
MPLAD18KP24AE3 FAQ
1.How can I place an order for MPLAD18KP24AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP24AE3 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 MPLAD18KP24AE3 reliable?
The price and inventory of MPLAD18KP24AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP24AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP24AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP24AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP24AE3?
MPLAD18KP24AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP24AE3 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 MPLAD18KP24AE3?
For technical support, including MPLAD18KP24AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP24AE3 requirements.
6.How does Aetrix verify that MPLAD18KP24AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP24AE3 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 MPLAD18KP24AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP24AE3?
All MPLAD18KP24AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP24AE3, 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 MPLAD18KP24AE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP24AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP24AE3 Tags
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