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Microchip Technology MAPLAD18KP110AE3
- Part No.:
- MAPLAD18KP110AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP110AE3.pdf
- Description:
- TVS DIODE 110VWM 177VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,786
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Product details
Overview
MAPLAD18KP110AE3 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 <100 ps response time. It is widely deployed in aircraft lightning protection per RTCA DO-160 Section 22 and secondary surge suppression per IEC 61000-4-5.
For engineers reviewing the MAPLAD18KP110AE3 datasheet, MAPLAD18KP110AE3 pinout, MAPLAD18KP110AE3 application, or MAPLAD18KP110AE3 equivalent, key selection criteria include its 110 V VWM rating, 177 V max clamping voltage at 1000 A, 0.7 °C/W junction-to-case thermal resistance, RoHS-compliant e3 plating, and qualification to AEC-Q101 and MIL-PRF-19500 screening levels.
Technical Context
This TVS diode employs an avalanche breakdown structure optimized for fast transient response and high-energy absorption. Its metal-base package enables direct thermal coupling to heatsinks, achieving RθJC = 0.7 °C/W - critical for multi-stroke lightning events where cumulative heating must be minimized.
The device operates with a defined polarity: cathode on the metal base (bottom side), requiring correct PCB pad layout per RF01215 Rev B. It meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and RTCA DO-160F Waveform 4 & 5A pin-injection requirements up to Level 5 (for VWM ≤130 V variants) and Level 4 (up to 200 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains full-rated surge energy without degradation under standard lightning waveform testing |
| Reverse Standoff Voltage (VWM) | 110 V - maximum continuous DC or peak AC voltage the device blocks without conduction |
| Max Clamping Voltage (VC) | 177 V @ IPP = 1000 A - limits downstream circuit voltage during worst-case surge, enabling robust system-level protection |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to external heatsink, essential for repetitive surge duty cycles |
| Response Time | <100 ps - ensures sub-nanosecond turn-on to protect sensitive electronics before transient energy propagates |
| RoHS Compliance | e3 marking - matte-tin plating compliant with EU RoHS Directive 2011/65/EU, lead-free and solderable per MIL-STD-750 |
| Steady-State Power Dissipation | 2.5 W @ TA = 25°C - defines safe continuous biasing capability outside surge conditions |
Pinout & Package
MAPLAD18KP110AE3 uses a surface-mount PLAD package with a metal base acting as the cathode terminal. The package measures 12.32 × 10.54 × 5.08 mm (L × W × H) with a void-free UL94V-0 epoxy body and tin-plated terminals. Mounting requires thermal pad on PCB per RF01215 recommended layout (Ref. A1/A2/C/D dimensions).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary current return path and thermal interface - must be soldered to large copper pour or heatsink for RθJC = 0.7 °C/W performance |
| Top Surface Pad | Anode | Serves as high-current surge entry point; connects to protected line (e.g., 28 V aircraft bus or 12 V automotive rail) |
Key Features
| Feature | Design Value |
|---|---|
| Aerospace-grade lightning compliance | Validated to RTCA DO-160F Section 22 multi-stroke lightning - supports certification of avionics power inputs without additional external clamping stages |
| High-reliability wafer traceability | Full lot traceability per MIL-PRF-19500 - enables failure analysis and conformance verification for defense and space programs |
| Low-profile SMT form factor | Height ≤5.33 mm - enables integration into space-constrained avionics modules while maintaining 18 kW surge capacity |
| IEC 61000-4-5 secondary protection | Class 1–5 certified with 42 Ω source impedance - provides interoperability with standardized industrial surge test setups |
| ESD/EFT immunity | Rated per IEC 61000-4-2 (±30 kV contact) and IEC 61000-4-4 (4 kV burst) - eliminates need for supplemental TVS or filtering in front-end protection networks |
Applications
| Aircraft Power Distribution Units | Automotive Load Dump Protection |
|---|---|
|
Use Scenario: Protecting 28 V DC bus inputs in flight control computers and navigation radios against lightning-induced transients per DO-160F Section 22. IC Role / Device Role / Timing Role: Primary transient voltage suppressor placed directly at connector entry, clamping surges before they reach DC-DC converters and FPGAs. Use Value: Enables single-stage protection architecture by absorbing 18 kW pulses without failure, reducing BOM count and board area versus stacked TVS + MOV solutions. |
Use Scenario: Safeguarding engine control units (ECUs) and ADAS sensors during alternator load dump events in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional TVS connected between battery rail and ground, triggered only during overvoltage transients (>110 V), remaining transparent during normal operation. Use Value: Withstands 1000 A peak current at 177 V clamping, limiting ECU input voltage below 180 V - well within automotive IC absolute maximum ratings. |
| Industrial Motor Drive DC Links | Railway Signaling Power Inputs |
|
Use Scenario: Shielding IGBT gate drivers and microcontrollers in variable-frequency drives from switching-induced transients on 400–690 V DC link rails. IC Role / Device Role / Timing Role: Secondary surge clamp installed across DC bus capacitors, activated only during rare fault conditions exceeding VWM. Use Value: 0.7 °C/W RθJC allows mounting directly to aluminum heatsink, preventing thermal runaway during repeated 10/1000 μs surges in factory automation environments. |
Use Scenario: Securing 110 V DC signaling power supplies in European railway interlocking systems against induced surges from nearby traction currents. IC Role / Device Role / Timing Role: Bidirectional-capable variant (MAPLAD18KP110CA) used for AC-coupled signal lines; unidirectional MAPLAD18KP110AE3 applied to DC supply rails. Use Value: Meets EN 50121-4 immunity requirements for Class 3 equipment with 177 V clamping - ensuring signal integrity during electromagnetic disturbances on rail infrastructure. |
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 SP1003-0110 | 110 V VWM, 18 kW PPP, but TO-277 package (RθJC = 1.2 °C/W); no AEC-Q101 or DO-160 qualification | Used in commercial automotive ECUs where aerospace certification is not required | Select when cost sensitivity outweighs qualification needs and thermal performance margin permits higher RθJC |
| Vishay SMAJ110A | 110 V VWM, but only 400 W PPP (22× lower); SMA package (RθJA = 40 °C/W); no multi-stroke lightning validation | Suitable for low-energy ESD/EFT protection in consumer electronics, not for lightning or load dump | Choose only for non-safety-critical, low-power circuits where 18 kW surge handling is unnecessary |
Compared with MAPLAD18KP110AE3, SP1003-0110 offers similar surge rating but lacks aerospace qualification and has inferior thermal performance, while SMAJ110A provides basic ESD protection at a fraction of the energy-handling capability - neither matches the MAPLAD18KP110AE3's combination of 18 kW rating, DO-160 compliance, and 0.7 °C/W thermal resistance.
Availability
MAPLAD18KP110AE3 is available at Aetrix Electronics and suitable for aerospace power distribution, automotive ECU protection, and industrial motor drive applications requiring stable component supply, long-term lifecycle support, and qualified surge suppression components.
Supply support for MAPLAD18KP110AE3 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 ICs for aerospace, defense, and industrial markets.
The MAPLAD series was developed specifically for high-energy transient suppression in mission-critical platforms - emphasizing DO-160 compliance, thermal efficiency, and lot-traceable manufacturing for safety-certified systems.
FAQ
What is the clamping voltage of MAPLAD18KP110AE3 at its rated peak pulse current?
The MAPLAD18KP110AE3 has a maximum clamping voltage (VC) of 177 V when subjected to a 1000 A peak pulse current (IPP) under the standard 10/1000 μs waveform. This value is guaranteed per the RF01215 Rev B datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Is MAPLAD18KP110AE3 qualified for automotive applications?
Yes, MAPLAD18KP110AE3 is qualified to AEC-Q101 for stress testing and is widely used in automotive load dump protection. Its 110 V VWM and 177 V clamping align with 12 V system requirements, and its 18 kW surge rating exceeds ISO 7637-2 Pulse 5a requirements - though system-level validation remains the designer's responsibility.
Does MAPLAD18KP110AE3 require a heatsink for reliable operation?
MAPLAD18KP110AE3 achieves RθJC = 0.7 °C/W only when its metal base is soldered to a thermally robust PCB pad or external heatsink. Without such thermal management, junction temperature rise during repetitive surges may exceed 150 °C, risking parametric shift or failure - so heatsinking is mandatory for multi-stroke applications like DO-160 testing.
How does the e3 suffix in MAPLAD18KP110AE3 affect its assembly process?
The e3 suffix indicates RoHS-compliant matte-tin plating on MAPLAD18KP110AE3 terminals, fully compatible with standard lead-free reflow profiles (peak 260 °C for 10 s). It eliminates lead-based solder concerns while maintaining solderability per MIL-STD-750 Method 2026 - no process changes are needed versus legacy SnPb assembly.
Can MAPLAD18KP110AE3 be used in bidirectional configurations?
No - MAPLAD18KP110AE3 is unidirectional (denoted by "A" suffix). For bidirectional operation, the equivalent part is MAPLAD18KP110CA ("CA" suffix), which provides symmetrical clamping for AC-coupled or floating signal lines. Using MAPLAD18KP110AE3 in reverse-biased AC applications risks permanent breakdown.
MAPLAD18KP110AE3 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
MAPLAD18KP110AE3 FAQ
1.How can I place an order for MAPLAD18KP110AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP110AE3 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 MAPLAD18KP110AE3 reliable?
The price and inventory of MAPLAD18KP110AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP110AE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP110AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP110AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP110AE3?
MAPLAD18KP110AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP110AE3 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 MAPLAD18KP110AE3?
For technical support, including MAPLAD18KP110AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP110AE3 requirements.
6.How does Aetrix verify that MAPLAD18KP110AE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP110AE3 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 MAPLAD18KP110AE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP110AE3?
All MAPLAD18KP110AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP110AE3, 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 MAPLAD18KP110AE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP110AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP110AE3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
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Diodes Incorporated
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Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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