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Microchip Technology MPLAD18KP75AE3
- Part No.:
- MPLAD18KP75AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP75AE3.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,834
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Product details
Overview
MPLAD18KP75AE3 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 ≤121 V under 149 A peak impulse current, and features a 75 V reverse standoff voltage (VWM), 83.3–92.1 V breakdown voltage (V(BR)), and 0.7 °C/W junction-to-case thermal resistance.
For engineers reviewing the MPLAD18KP75AE3 datasheet, MPLAD18KP75AE3 pinout, MPLAD18KP75AE3 application, or MPLAD18KP75AE3 equivalent, key selection criteria include lightning-level multi-stroke compliance (RTCA DO-160 Section 22), secondary IEC 61000-4-5 protection up to Class 5 (42 Ω source), ESD/EFT immunity per IEC 61000-4-2/4-4, and RoHS-compliant e3 plating for lead-free assembly.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry, activating above its VWM to divert surge energy to ground while limiting voltage across protected components. Its low RθJC (0.7 °C/W) enables effective thermal management on FR4 PCBs with recommended pad layout, supporting sustained reliability under repetitive transients at ≤0.05% duty factor.
It meets AEC-Q101 stress testing requirements and supports high-reliability screening per MIL-PRF-19500. The cathode is located on the metal base (package bottom), requiring correct orientation during placement. Standby leakage (ID) is ≤10 μA at 75 V, ensuring minimal impact on system quiescent power.
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) | 75 V - maximum continuous operating voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 83.3–92.1 V @ I(BR) - precise conduction threshold for predictable turn-on |
| Max Clamping Voltage (VC) | 121 V @ 149 A - limits downstream voltage stress during worst-case surge |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to heatsink or copper plane |
| Standby Leakage Current (ID) | ≤10 μA @ 75 V - negligible power loss in standby mode |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack required, simplifies handling and storage |
Pinout & Package
Package: Surface-mount PLAD (Plastic Low-Profile Anode Down) with metal base cathode termination. Void-free UL94V-0 epoxy body, tin-lead or RoHS-compliant matte-tin plating, ~1 g weight. Cathode is the metal base (bottom side); anode is top-side metallization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary surge return path; must be soldered to large copper area or heatsink for thermal and electrical performance |
| Top-Side Metallization | Anode | Connection point to protected line; polarity-sensitive placement required for unidirectional operation |
Key Features
| Feature | Design Value |
|---|---|
| High-Power Surge Handling | 18 kW PPP rating enables single-device protection against RTCA DO-160 Section 22 multi-stroke lightning events |
| Low Thermal Resistance | 0.7 °C/W RθJC allows reliable operation at elevated ambient temperatures when mounted per recommended pad layout |
| Automotive & Aerospace Qualification | AEC-Q101 qualified and DO-160F Waveform 4/5A compliant (Level 4/5) for flight-critical and vehicle power systems |
| Robust ESD/EFT Immunity | IEC 61000-4-2 (±15 kV air, ±8 kV contact) and IEC 61000-4-4 (4 kV) protection built into device physics |
| Traceable High-Reliability Manufacturing | Wafer and assembly lot traceability plus 3σ screening on ID ensures consistent parametric performance across production lots |
Applications
| Aerospace Avionics Power Input | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC power input stage of flight control computers subjected to lightning-induced transients per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Primary clamping TVS placed upstream of DC-DC converters and LDOs to limit bus voltage excursion. Use Value: Withstands ≥100 multi-stroke 10/1000 μs surges at full 18 kW rating, eliminating need for redundant TVS stages. | Use Scenario: 12 V battery-fed engine control unit (ECU) exposed to ISO 7637-2 load dump pulses up to 120 V. IC Role / Device Role / Timing Role: Unidirectional TVS shunting surge energy to chassis ground during alternator field decay events. Use Value: Clamps to ≤121 V within nanoseconds, protecting 3.3 V/5 V logic rails and CAN transceivers without crowbar action. |
| Industrial Motor Drive DC Bus | Telecom Power Rectifier Output |
Use Scenario: 300 V DC bus in variable-frequency drives subject to IGBT switching transients and induced RFI. IC Role / Device Role / Timing Role: Secondary surge protector parallel to bulk capacitor, suppressing dV/dt spikes exceeding 1 kV/μs. Use Value: 0.7 °C/W thermal resistance maintains <125 °C junction temperature under repeated 100 A impulses at 1 Hz. | Use Scenario: Output of telecom rectifier module feeding 48 V distributed power architecture, requiring IEC 61000-4-5 Class 4 immunity. IC Role / Device Role / Timing Role: Bidirectional-capable variant (MPLAD18KP75CA) used for AC-input-side protection; this unidirectional version secures DC output rail. Use Value: Meets 42 Ω source impedance test at Class 5 level, enabling single-device compliance without external impedance matching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A | 600 W PPP rating, SMC package, 113 V max clamping @ 43.5 A | Lower energy handling; suitable only for IEC 61000-4-5 Class 2–3, not DO-160 or load dump | Select when cost sensitivity outweighs surge margin and board space permits larger footprint |
| SMCJ75A | 1500 W PPP rating, SMC package, 121 V max clamping @ 123 A | Lacks AEC-Q101 qualification and DO-160F waveform validation; limited thermal robustness (RθJC ≈ 2.5 °C/W) | Acceptable for commercial industrial use where multi-stroke endurance and aerospace certification are not required |
Compared with SMBJ75A and SMCJ75A, the MPLAD18KP75AE3 provides 30× and 12× higher peak pulse power respectively, validated clamping response under RTCA DO-160F waveforms, and superior thermal management-making it the only choice for certified aerospace and high-reliability automotive power protection.
Availability
MPLAD18KP75AE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU power inputs, and industrial motor drive DC bus protection requiring stable component supply across extended product lifecycles.
Supply support for MPLAD18KP75AE3 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) designs high-reliability analog, mixed-signal, and power semiconductors for aerospace, defense, communications, and industrial markets.
The MPLAD18KP75AE3 belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for certified lightning and load dump protection in safety-critical systems where multi-stroke endurance and thermal stability are non-negotiable.
FAQ
What is the clamping voltage of MPLAD18KP75AE3 at its rated peak pulse current?
The MPLAD18KP75AE3 has a maximum clamping voltage (VC) of 121 V at 149 A peak pulse current (IPP), measured under standard 10/1000 μs waveform conditions. This value ensures protected downstream circuitry remains below critical overvoltage thresholds during full-rated surge events. The clamping response time is less than 100 ps, enabling effective suppression of fast-rising transients.
Is MPLAD18KP75AE3 qualified for automotive applications per AEC-Q101?
Yes, MPLAD18KP75AE3 is tested and qualified to AEC-Q101 standards for stress reliability, including high-temperature operating life, temperature cycling, and surge testing. Its construction, wafer-level traceability, and 3σ screening on standby current (ID) meet automotive-grade quality requirements for engine control, body electronics, and ADAS power systems.
How does the thermal performance of MPLAD18KP75AE3 compare to standard SMC-package TVS diodes?
MPLAD18KP75AE3 achieves a junction-to-case thermal resistance (RθJC) of 0.7 °C/W, significantly lower than typical SMC-package TVS devices (~2.0–2.5 °C/W). This enables more efficient heat transfer to the PCB copper plane or external heatsink, allowing sustained operation at higher ambient temperatures and greater impulse repetition rates without thermal runaway.
Can MPLAD18KP75AE3 be used for bidirectional surge protection?
No - MPLAD18KP75AE3 is a unidirectional TVS diode, indicated by the "A" suffix (vs. "CA" for bidirectional variants like MPLAD18KP75CA). It conducts only during reverse-biased overvoltage events. For AC-line or differential signal protection requiring symmetrical clamping, the CA-suffixed version must be selected instead.
What packaging and plating options are available for MPLAD18KP75AE3?
MPLAD18KP75AE3 is supplied with RoHS-compliant annealed matte-tin plating ("e3" designation), compatible with lead-free reflow processes. It is available in bulk or tape-and-reel format (add "TR" suffix for EIA-481-B compliant reels). The device uses void-free UL94V-0 epoxy encapsulation and features marking of the full part number on the body.
MPLAD18KP75AE3 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 1396A (1.396kA)
- 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
MPLAD18KP75AE3 FAQ
1.How can I place an order for MPLAD18KP75AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP75AE3 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 MPLAD18KP75AE3 reliable?
The price and inventory of MPLAD18KP75AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP75AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP75AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP75AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP75AE3?
MPLAD18KP75AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP75AE3 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 MPLAD18KP75AE3?
For technical support, including MPLAD18KP75AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP75AE3 requirements.
6.How does Aetrix verify that MPLAD18KP75AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP75AE3 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 MPLAD18KP75AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP75AE3?
All MPLAD18KP75AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP75AE3, 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 MPLAD18KP75AE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP75AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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