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Microchip Technology MAPLAD18KP75AE3
- Part No.:
- MAPLAD18KP75AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP75AE3.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,123
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Product details
Overview
MAPLAD18KP75AE3 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 75 V reverse standoff voltage (VWM), clamps to ≤121 V at 149 A peak pulse current (IPP), and exhibits 0.7 °C/W junction-to-case thermal resistance for efficient heat dissipation in lightning and load-dump protection circuits.
For engineers reviewing the MAPLAD18KP75AE3 datasheet, MAPLAD18KP75AE3 pinout, MAPLAD18KP75AE3 application, or MAPLAD18KP75AE3 equivalent, this device is selected for DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection where low-profile SMT mounting, traceable lot reliability, and RoHS-compliant e3 plating are required.
Technical Context
This TVS diode employs an avalanche breakdown structure optimized for fast response (<100 ps rise time) and stable clamping under multi-stroke transients. Its metal-base cathode construction enables direct thermal coupling to heatsinks or PCB copper planes, supporting sustained operation with RθJC = 0.7 °C/W and RθJA = 50 °C/W on FR4.
It meets AEC-Q101 stress testing requirements and supports MIL-PRF-19500 upscreening options. The device operates across –55 °C to +150 °C junction temperature range and maintains <10 μA standby current at 75 V VWM, ensuring minimal leakage in always-on protection paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 18,000 W @ 10/1000 μs - sustains aircraft lightning strike energy per RTCA DO-160 Section 22 without failure |
| Reverse Standoff Voltage | 75 V - maximum continuous DC or peak AC voltage before clamping initiates; matches 60 V nominal bus with margin |
| Clamping Voltage | 121 V @ 149 A IPP - limits downstream voltage stress during surge, enabling 150 V-rated system components |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables direct thermal path to heatsink or large copper pour for repeated surge duty cycles |
| Standby Current | <10 μA @ 75 V - negligible power loss in standby, critical for battery-backed or low-quiescent systems |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack or bake required prior to reflow, simplifying manufacturing flow |
| RoHS Compliance | e3 matte-tin plating - lead-free termination compatible with standard Pb-free reflow profiles |
Pinout & Package
MAPLAD18KP75AE3 uses a low-profile surface-mount PLAD package with two terminals: anode and cathode. The cathode is the metal base (bottom side), requiring thermal pad connection to PCB ground plane or heatsink for optimal thermal performance. Package dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive input terminal | Connected to protected line (e.g., 28 V aircraft bus); current flows into device during reverse surge |
| Cathode | Ground reference / heat sink interface | Metal base serves as both electrical return and primary thermal conduction path to PCB copper or external heatsink |
Key Features
| Feature | Design Value |
|---|---|
| High-reliability wafer lot traceability | Full fabrication and assembly lot tracking per MIL-PRF-19500 - enables failure analysis and supply chain audit for aerospace programs |
| DO-160F Waveform 4 Level 4 compliance | Withstands 6.4/69 μs pin-injection surge at 75 V VWM - certified for avionics equipment in lightning-prone zones |
| IEC 61000-4-5 Class 1–5 secondary protection | Validated at 42 Ω, 12 Ω, and 2 Ω source impedances - covers wide range of industrial and transportation surge test configurations |
| Low-profile thermally enhanced SMT | 0.7 °C/W RθJC and void-free UL94V-0 epoxy body - achieves higher power density than TO-218 or DO-214AB alternatives |
| AEC-Q101 qualified | Stress-tested per automotive-grade reliability standards - suitable for under-hood and EV powertrain applications |
Applications
| Aerospace Avionics Power Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: Protecting flight control computers and sensor interfaces against induced lightning transients on 28 V DC distribution buses. IC Role / Device Role / Timing Role: Unidirectional TVS placed at board-level input to clamp surges before they reach DC/DC converters and microcontrollers. Use Value: Meets RTCA DO-160F Section 22 multi-stroke lightning requirement with verified 18 kW capability and Level 4 pin injection immunity. |
Use Scenario: Safeguarding engine control units (ECUs) during alternator load dump events in 12 V/24 V vehicle electrical systems. IC Role / Device Role / Timing Role: Primary clamping device across battery rail, activated within <100 ps to limit voltage to ≤121 V during 149 A surge. Use Value: Eliminates need for bulky discrete MOVs or hybrid solutions while maintaining AEC-Q101 qualification and thermal robustness. |
| Industrial Motor Drive DC Bus Protection | Railway Signaling Power Interface |
Use Scenario: Shielding variable-frequency drive (VFD) control boards from switching-induced transients on 300–600 V DC link rails. IC Role / Device Role / Timing Role: Secondary protection stage after upstream fusing, absorbing repetitive 10/1000 μs surges from IGBT commutation. Use Value: 0.7 °C/W RθJC enables reliable operation without forced air cooling, reducing system size and cost vs. through-hole alternatives. |
Use Scenario: Securing track-side signaling electronics connected to 75 V DC power feeds exposed to traction current surges and EMI. IC Role / Device Role / Timing Role: Bidirectional-capable variant (MAPLAD18KP75CA) used in full-bridge protection; unidirectional version deployed on single-rail inputs. Use Value: Validated for IEC 61000-4-5 Class 4 at 12 Ω source impedance - ensures interoperability with EN 50121-4 railway EMC 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 SMAJ75A | 75 V VWM, 1500 W PPP, DO-214AC package, RθJA ≈ 40 °C/W, no AEC-Q101 or DO-160F certification | Rated only for general industrial use; insufficient for aviation lightning or automotive load dump validation | Select when cost sensitivity outweighs certification needs and surge energy is limited to ≤1.5 kW |
| Vishay SM8S75A | 75 V VWM, 6600 W PPP, DO-218AB package, RθJC ≈ 1.5 °C/W, AEC-Q101 qualified but not DO-160F tested | Supports automotive qualification but lacks RTCA DO-160F Waveform 4 Level 4 validation and 18 kW capability | Choose for AEC-Q101-compliant automotive ECUs where 6.6 kW peak power suffices and DO-160F is not mandated |
Compared with SMAJ75A and SM8S75A, MAPLAD18KP75AE3 provides 2.7× and 2.7× higher peak pulse power respectively, validated DO-160F compliance, and superior thermal performance (RθJC = 0.7 °C/W), making it uniquely suited for high-reliability aerospace and heavy-duty automotive applications demanding multi-stroke survivability.
Availability
MAPLAD18KP75AE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain, and industrial motor drive applications requiring stable component supply, full lot traceability, and certified surge handling up to 18,000 W.
Supply support for MAPLAD18KP75AE3 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, RF, and timing solutions for aerospace, defense, and industrial markets.
The MAPLAD series was developed specifically for high-power, surface-mount transient suppression in safety-critical systems where DO-160F, AEC-Q101, and IEC 61000-4-5 compliance are mandatory design requirements.
FAQ
What is the clamping voltage of MAPLAD18KP75AE3 at its rated peak pulse current?
The MAPLAD18KP75AE3 has a maximum clamping voltage (VC) of 121 V at 149 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01215 datasheet and defines the upper voltage limit imposed on protected circuitry during a full-energy surge event. The clamping performance is guaranteed across the –55 °C to +150 °C operating junction temperature range.
Is MAPLAD18KP75AE3 certified for RTCA DO-160F lightning protection?
Yes, MAPLAD18KP75AE3 is certified for RTCA DO-160F Section 22 lightning-induced transient testing, specifically Waveform 4 (6.4/69 μs) at Level 4. This qualification is explicitly stated in the RF01215 datasheet and applies directly to the MAPLAD18KP75AE3 variant with 75 V standoff voltage. It is not rated for Waveform 5A at Level 4 due to voltage threshold limitations.
Does MAPLAD18KP75AE3 require special PCB layout considerations for thermal management?
Yes - the cathode is the metal base of MAPLAD18KP75AE3 and serves as the primary thermal conduction path. The datasheet specifies a recommended pad layout (page 7 of RF01215) with minimum 12.32 mm × 10.54 mm copper area, connected to internal ground planes via ≥6 thermal vias. Failure to implement this reduces RθJC performance and risks thermal runaway during repetitive surges.
What is the moisture sensitivity level (MSL) and reflow profile for MAPLAD18KP75AE3?
MAPLAD18KP75AE3 is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ambient conditions without dry packing or baking. Its RoHS-compliant e3 matte-tin terminations support standard Pb-free reflow profiles with peak temperature up to 260 °C for 10 seconds, as confirmed in the "Mechanical and Packaging" section of RF01215.
How does MAPLAD18KP75AE3 differ from bidirectional variants like MAPLAD18KP75CA?
MAPLAD18KP75AE3 is unidirectional, with polarity marked by cathode-on-base construction, and is intended for DC rail protection where surge polarity is known. MAPLAD18KP75CA is bidirectional, symmetrically clamping both positive and negative transients, and carries a "CA" suffix. Both share identical PPP (18,000 W), VWM (75 V), and thermal specs, but differ in circuit placement and grounding strategy - MAPLAD18KP75AE3 requires correct orientation during placement.
MAPLAD18KP75AE3 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
MAPLAD18KP75AE3 FAQ
1.How can I place an order for MAPLAD18KP75AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP75AE3 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 MAPLAD18KP75AE3 reliable?
The price and inventory of MAPLAD18KP75AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP75AE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP75AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP75AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP75AE3?
MAPLAD18KP75AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP75AE3 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 MAPLAD18KP75AE3?
For technical support, including MAPLAD18KP75AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP75AE3 requirements.
6.How does Aetrix verify that MAPLAD18KP75AE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP75AE3 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 MAPLAD18KP75AE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP75AE3?
All MAPLAD18KP75AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP75AE3, 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 MAPLAD18KP75AE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP75AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP75AE3 Tags
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