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Microchip Technology MAPLAD18KP36CAE3
- Part No.:
- MAPLAD18KP36CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP36CAE3.pdf
- Description:
- TVS DIODE 36VWM 58.1VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,471
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Product details
Overview
MAPLAD18KP36CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps to ≤58.1 V at 310 A, and features a 36 V reverse standoff voltage (VWM), 40.0–44.2 V breakdown voltage (V(BR)), and 0.7 °C/W junction-to-case thermal resistance.
For engineers reviewing the MAPLAD18KP36CAE3 datasheet, MAPLAD18KP36CAE3 pinout, MAPLAD18KP36CAE3 application, or MAPLAD18KP36CAE3 equivalent, key selection criteria include IEC 61000-4-5 Class 4 secondary lightning protection (with 42 Ω source), RTCA/DO-160F Waveform 4 Level 4 compliance, and bidirectional polarity for AC-coupled signal line protection.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device triggered by avalanche breakdown, with symmetrical bidirectional conduction enabling protection of AC or differential signal paths without polarity constraints. Its low RθJC (0.7 °C/W) and void-free epoxy package support high-reliability mounting on FR4 PCBs with thermal pad layout per RF01215 Rev B.
It meets AEC-Q101 stress testing requirements and supports MIL-PRF-19500 upscreening options. The cathode is defined as the metal base (package bottom), and it achieves <5 ns response time under bidirectional transient conditions per specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 36 V - maximum continuous operating voltage before clamping begins |
| V(BR) min/max | 40.0–44.2 V - guaranteed avalanche initiation range at 5 mA, defining turn-on threshold tolerance |
| VC @ IPP | 58.1 V max at 310 A - clamping voltage under 10/1000 μs surge, directly limiting downstream component stress |
| PPP | 18,000 W - peak pulse power handling capability, enabling multi-stroke lightning protection per DO-160 Section 22 |
| RθJC | 0.7 °C/W - enables efficient heat transfer to heatsink or copper plane, critical for sustained surge duty cycles |
| ID @ VWM | 10 μA max - ultra-low leakage ensures minimal standby power impact in high-impedance circuits |
| Package | PLAD - surface-mount thermoset epoxy package with metal base cathode, optimized for thermal and mechanical robustness |
Pinout & Package
The MAPLAD18KP36CAE3 uses a 2-terminal PLAD package with the cathode electrically connected to the exposed metal base (bottom side). No top-side markings indicate polarity; orientation is defined by PCB pad layout per RF01215 Rev B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top metallization) | Transient current entry point (bidirectional) | Accepts surge current in either direction; forms symmetrical clamping path with cathode |
| Cathode (metal base) | Common reference / heat sink interface | Provides lowest-inductance return path and primary thermal conduction route to PCB copper or heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional construction | Enables single-device protection of AC lines, differential buses (e.g., RS-485, CAN), or floating sensors without polarity concerns |
| 18 kW peak pulse rating | Supports repeated lightning-induced surges per RTCA/DO-160F Section 22, reducing need for redundant protection stages |
| 0.7 °C/W RθJC | Allows >70% higher steady-state power dissipation vs. standard SMC packages, improving thermal margin in compact layouts |
| IEC 61000-4-5 Class 4 compliance (42 Ω) | Validated for secondary lightning protection in avionics and rail electronics where 4 kV/2 Ω or 2 kV/12 Ω tests are insufficient |
| RoHS-compliant e3 plating | Matte-tin terminations ensure reliable solderability per MIL-STD-750 Method 2026 and compatibility with lead-free reflow profiles |
Applications
| Aerospace Avionics Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: Protecting 28 V DC bus inputs in flight control computers against induced transients from lightning attachment points. IC Role / Device Role / Timing Role: Bidirectional TVS clamping device placed at board-level input filter stage. Use Value: Meets RTCA/DO-160F Waveform 4 Level 4 (6.4/69 μs) and Section 22 multi-stroke requirements without derating at 25 °C. | Use Scenario: Safeguarding infotainment head-unit power inputs during alternator load dump events (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V supply rail upstream of DC/DC converters. Use Value: Clamps to 58.1 V within 5 ns, limiting stress on 40 V-rated input capacitors and MOSFETs. |
| Industrial Ethernet PHY Interfaces | Railway Signaling Data Lines |
Use Scenario: Protecting RJ45 magnetics common-mode pins in Gigabit Ethernet switches deployed in outdoor substations. IC Role / Device Role / Timing Role: Common-mode TVS pair (two devices) across differential pairs to suppress EFT and surge coupling. Use Value: Withstands 4 kV contact discharge per IEC 61000-4-2 and 2 kV surge per IEC 61000-4-5 (42 Ω source, Class 4). | Use Scenario: Shielding track circuit receiver inputs from traction current transients and lightning-induced ground potential rise. IC Role / Device Role / Timing Role: Bidirectional clamping element on 60 V nominal signaling lines with galvanic isolation barriers. Use Value: Supports IEC 61000-4-5 Class 3 (2 kV, 42 Ω) and Class 4 (4 kV, 42 Ω) testing with no degradation after 500 surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA | 600 W PPP rating, 36 V VWM, same bidirectional polarity but 1/30th peak power capacity | Suitable only for low-energy ESD/EFT; cannot meet DO-160F Section 22 or IEC 61000-4-5 Class 4 | Select when cost and board space constrain design and surge threat level is limited to IEC 61000-4-2/4-4 |
| SMCJ36CA | 1500 W PPP rating, identical VWM and polarity, but lacks AEC-Q101 qualification and DO-160F validation | Acceptable for commercial industrial use but not certified for aerospace or automotive safety-critical subsystems | Select for non-certified applications requiring higher energy handling than SMBJ but lower cost and qualification burden than MAPLAD |
Compared with SMBJ36CA and SMCJ36CA, MAPLAD18KP36CAE3 provides 12× and 12× higher peak pulse power respectively, validated AEC-Q101 reliability, and full DO-160F/IEC 61000-4-5 compliance-making it the only option for certified airborne or high-reliability rail electronics.
Availability
MAPLAD18KP36CAE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive power distribution, and industrial railway signaling systems requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD18KP36CAE3 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 semiconductor solutions for aerospace, defense, and industrial markets, with emphasis on radiation-hardened, high-power, and certified components.
The MAPLAD series was developed specifically for high-energy transient suppression in safety-critical platforms where DO-160, AEC-Q101, and IEC 61000-4-5 compliance are mandatory-not as general-purpose TVS diodes but as certified system-level protection elements.
FAQ
What is the clamping voltage of MAPLAD18KP36CAE3 at its rated peak pulse current?
The MAPLAD18KP36CAE3 has a maximum clamping voltage (VC) of 58.1 V at its rated peak pulse current (IPP) of 310 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in RF01215 Rev B and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The MAPLAD18KP36CAE3 maintains this clamping performance across its qualified temperature range.
Is MAPLAD18KP36CAE3 qualified to AEC-Q101 for automotive use?
Yes, MAPLAD18KP36CAE3 is tested and qualified to AEC-Q101 for stress reliability, including high-temperature operating life, temperature cycling, and surge testing. This qualification supports its use in automotive load dump protection applications such as engine control units and infotainment systems. The MAPLAD18KP36CAE3 data sheet explicitly states AEC-Q101 compliance in the "High-Reliability screening" section.
Does MAPLAD18KP36CAE3 meet RTCA/DO-160F Section 22 lightning test requirements?
Yes, MAPLAD18KP36CAE3 is specifically designed and validated for RTCA/DO-160F Section 22 multi-stroke lightning testing. Its 18,000 W peak pulse power rating and sub-5 ns response enable compliance with Waveform 4 Level 4 (6.4/69 μs) and Waveform 5A Level 4 (40/120 μs) at 25 °C. The MAPLAD18KP36CAE3 datasheet cites DO-160F compliance in both the description and application notes.
What is the thermal resistance junction-to-case (RθJC) for MAPLAD18KP36CAE3?
The thermal resistance junction-to-case (RθJC) for MAPLAD18KP36CAE3 is 0.7 °C/W, as specified in the "Maximum Ratings" table of RF01215 Rev B. This low value enables efficient heat transfer from the silicon die to the metal base, supporting high-duty-cycle surge operation when mounted on adequately sized copper planes. The MAPLAD18KP36CAE3 achieves this via direct die-to-base thermal path design.
How does the bidirectional polarity of MAPLAD18KP36CAE3 affect PCB layout?
The bidirectional polarity of MAPLAD18KP36CAE3 eliminates orientation sensitivity during placement-no anode/cathode alignment is required. However, the metal base (cathode) must be soldered to a large thermal pad per RF01215 Rev B's pad layout to maintain RθJC = 0.7 °C/W. The MAPLAD18KP36CAE3 requires symmetric trace routing for balanced impedance in differential applications, and its bottom-side cathode mandates keep-out zones on inner layers beneath the device.
MAPLAD18KP36CAE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 310A
- 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
MAPLAD18KP36CAE3 FAQ
1.How can I place an order for MAPLAD18KP36CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP36CAE3 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 MAPLAD18KP36CAE3 reliable?
The price and inventory of MAPLAD18KP36CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP36CAE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP36CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP36CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP36CAE3?
MAPLAD18KP36CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP36CAE3 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 MAPLAD18KP36CAE3?
For technical support, including MAPLAD18KP36CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP36CAE3 requirements.
6.How does Aetrix verify that MAPLAD18KP36CAE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP36CAE3 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 MAPLAD18KP36CAE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP36CAE3?
All MAPLAD18KP36CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP36CAE3, 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 MAPLAD18KP36CAE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP36CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP36CAE3 Tags
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Diodes Incorporated
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