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Microchip Technology MPLAD18KP110AE3
- Part No.:
- MPLAD18KP110AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP110AE3.pdf
- Description:
- TVS DIODE 110VWM 177VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:9,446
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Product details
Overview
MPLAD18KP110AE3 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, features a 110 V reverse standoff voltage (VWM), clamps to ≤177 V at 1000 A IPP, and exhibits 5 μA standby current at VWM. It is qualified to AEC-Q101 and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection.
For engineers reviewing the MPLAD18KP110AE3 datasheet, MPLAD18KP110AE3 pinout, MPLAD18KP110AE3 application, or MPLAD18KP110AE3 equivalent, key selection criteria include its 110 V standoff rating, 177 V max clamping voltage at 1000 A, low 0.7 °C/W junction-to-case thermal resistance, RoHS-compliant e3 plating, and qualification for aircraft lightning protection per DO-160 Section 22.
Technical Context
This TVS diode employs an avalanche breakdown mechanism to divert high-energy transients away from sensitive downstream circuitry. Its metal-base package provides direct thermal conduction to the PCB ground plane, enabling efficient heat dissipation during multi-stroke surges.
It operates as a unidirectional clamp with cathode on the metal base (bottom side), requiring correct PCB orientation for polarity-sensitive DC bus protection. The device is surge-tested per IEC 61000-4-5 and validated for RTCA DO-160F Waveform 4 (6.4/69 μs) up to Level 4 at 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains full-rated lightning surge energy without failure |
| Reverse Standoff Voltage (VWM) | 110 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Max Clamping Voltage (VC) | 177 V @ 1000 A - limits downstream voltage stress during worst-case surge |
| Standby Current (ID) | 5 μA @ 110 V - negligible leakage in normal operation, avoids system power drain |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables effective heat transfer to heatsink or copper pour for repeated surges |
| Breakdown Voltage (VBR) | 122–135 V @ test current - defines reliable avalanche onset threshold |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack or bake required prior to reflow |
Pinout & Package
Package: Surface-mount PLAD (Power Leadless Array Device) with metal base cathode terminal. Dimensions: 12.32 × 10.54 × 5.33 mm (L × W × H); weight ≈1 g; UL94V-0 epoxy body; matte-tin (e3) RoHS-compliant plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top-side metallization) | Transient current entry point | Connected to protected line (e.g., 110 V DC bus); must be routed with low-inductance trace |
| Cathode (metal base / bottom side) | Clamp return path | Must be soldered directly to large copper ground plane or heatsink for thermal and electrical performance |
Key Features
| Feature | Design Value |
|---|---|
| DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin-injection surge up to 110 V VWM devices - meets aircraft avionics immunity requirements |
| AEC-Q101 qualification | Qualified for automotive under-hood applications including load dump and alternator transients |
| Low RθJC (0.7 °C/W) | Enables >50% higher surge repetition rate vs. standard SMD TVS when mounted on 2 oz Cu ground plane |
| IEC 61000-4-5 Class 1–5 support | Secondary lightning protection with 42 Ω source impedance - suitable for industrial AC/DC input stages |
| e3 RoHS-compliant plating | Matte-tin finish ensures reliable solderability and long-term intermetallic stability in lead-free reflow |
Applications
| Aircraft Avionics Power Input | Automotive 48 V DC Bus Protection |
|---|---|
Use Scenario: Protection of flight control unit power inputs against lightning-induced surges per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Primary transient suppression device placed at board-level power entry, clamping fast-rising transients before they reach DC/DC converters. Use Value: Enables compliance with Level 4 Waveform 4 (6.4/69 μs) without external heatsinking due to low RθJC and metal-base thermal path. |
Use Scenario: Load dump protection on 48 V battery-fed ECUs in commercial vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed across main power rail to absorb 120 V/400 ms transients generated by alternator field decay. Use Value: Withstands ≥1000 A peak current at 177 V clamping, limiting downstream MOSFET drain-source voltage stress below 200 V rating. |
| Industrial AC/DC Front-End | Railway Signaling Power Supply |
Use Scenario: Secondary surge protection stage after MOV-based primary clamping in DIN-rail power supplies. IC Role / Device Role / Timing Role: Fast-response TVS providing precise clamping (177 V) after slower MOVs handle bulk energy, protecting rectifier bridges and PFC controllers. Use Value: Low clamping ratio (VC/VWM = 1.61) ensures tighter voltage margin than typical MOVs, improving reliability of 200 V-rated components. |
Use Scenario: Protection of 110 V DC signaling interfaces in train control systems exposed to traction-induced surges. IC Role / Device Role / Timing Role: Bidirectional-capable variant family member (MPLAD18KP110CA) used for differential signal line protection; this unidirectional version secures single-ended supply rails. Use Value: Validated for IEC 61000-4-5 with 2 Ω source impedance (Class 2/3), matching railway surge coupling network 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 |
|---|---|---|---|
| Littelfuse SMAJ110A | Lower PPP (400 W), smaller SMA package, RθJA = 50 °C/W, no AEC-Q101 or DO-160 qualification | Suitable for consumer-grade 110 V AC line protection; not rated for multi-stroke lightning or automotive load dump | Select only for cost-sensitive, low-energy applications where qualification and thermal performance are non-critical |
| Vishay SM8S110A | 18 kW PPP same rating, but TO-277 package (RθJC = 1.5 °C/W), no DO-160 validation, higher VC = 187 V | Acceptable for industrial 110 V DC bus where PCB space allows through-hole or larger SMD footprint | Prefer when legacy TO-277 layout exists; avoid where DO-160 compliance or minimal thermal resistance is mandatory |
Compared with SMAJ110A and SM8S110A, MPLAD18KP110AE3 uniquely combines 18 kW surge capability, AEC-Q101 + DO-160F qualification, 0.7 °C/W thermal resistance, and RoHS e3 plating - making it the only option qualified for certified aerospace and high-reliability automotive power rail protection.
Availability
MPLAD18KP110AE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive 48 V systems, and industrial AC/DC front-end designs requiring stable component supply, long-lifecycle assurance, and certified surge immunity.
Supply support for MPLAD18KP110AE3 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 power management solutions for aerospace, defense, and industrial markets.
The MPLAD series was developed specifically for high-power, surface-mount transient suppression in safety-critical platforms where DO-160, AEC-Q101, and IEC 61000-4-5 compliance are mandatory - emphasizing thermal robustness, lot traceability, and multi-stroke surge endurance.
FAQ
What is the clamping voltage of MPLAD18KP110AE3 at its rated peak pulse current?
The MPLAD18KP110AE3 has a maximum clamping voltage (VC) of 177 V at 1000 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is guaranteed per the datasheet's Electrical Characteristics table and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The clamping performance is repeatable across temperature and lifetime when mounted per recommended pad layout.
Is MPLAD18KP110AE3 qualified for automotive applications?
Yes, MPLAD18KP110AE3 is AEC-Q101 qualified, confirming its suitability for automotive electronic systems. It is specifically designed to withstand load dump transients and other high-energy surges common in 12 V, 24 V, and emerging 48 V vehicle architectures. Its construction, wafer-level traceability, and surge testing align with automotive reliability requirements beyond basic qualification.
Does MPLAD18KP110AE3 meet RTCA DO-160 lightning protection standards?
Yes, MPLAD18KP110AE3 is validated for RTCA DO-160F Section 22 lightning-induced transient testing. It meets Waveform 4 (6.4/69 μs) up to Level 4 and Waveform 5A (40/120 μs) up to Level 4 for 110 V VWM variants. This makes MPLAD18KP110AE3 appropriate for primary or secondary lightning protection in certified aircraft avionics equipment.
What is the thermal resistance and how does it affect MPLAD18KP110AE3's surge handling?
MPLAD18KP110AE3 has a junction-to-case thermal resistance (RθJC) of 0.7 °C/W. This low value enables rapid heat transfer from the silicon die to the PCB ground plane or heatsink, allowing the device to sustain multiple high-energy surges without thermal runaway. In practice, this permits ≥3× higher impulse repetition rates compared to standard SMD TVS diodes with RθJC >2.0 °C/W when mounted identically.
How is polarity configured on MPLAD18KP110AE3 and what is the mounting requirement?
MPLAD18KP110AE3 is unidirectional, with the cathode located on the metal base (bottom side) and the anode on the top metallization. Correct mounting requires soldering the metal base directly to a large, low-impedance copper ground plane to serve both as the electrical return path and primary thermal conduction path. Reversing polarity will prevent proper clamping and may cause catastrophic failure under surge.
MPLAD18KP110AE3 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):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 177V
- Current - Peak Pulse (10/1000µs):
- 102A
- 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
MPLAD18KP110AE3 FAQ
1.How can I place an order for MPLAD18KP110AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP110AE3 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 MPLAD18KP110AE3 reliable?
The price and inventory of MPLAD18KP110AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP110AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP110AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP110AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP110AE3?
MPLAD18KP110AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP110AE3 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 MPLAD18KP110AE3?
For technical support, including MPLAD18KP110AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP110AE3 requirements.
6.How does Aetrix verify that MPLAD18KP110AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP110AE3 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 MPLAD18KP110AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP110AE3?
All MPLAD18KP110AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP110AE3, 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 MPLAD18KP110AE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP110AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP110AE3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Diodes Incorporated
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