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Microchip Technology MAPLAD18KP8.0CA
- Part No.:
- MAPLAD18KP8.0CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP8.0CA.pdf
- Description:
- TVS DIODE 8VWM 13.6VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,329
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Product details
Overview
MAPLAD18KP8.0CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps to ≤13.6 V at 1324 A, and features a 8.0 V reverse standoff voltage (VWM) with ±6.0 mV/°C temperature coefficient of breakdown voltage. It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection for Waveform 4.
For engineers reviewing the MAPLAD18KP8.0CA datasheet, MAPLAD18KP8.0CA pinout, MAPLAD18KP8.0CA application, or MAPLAD18KP8.0CA equivalent, this device is selected for secondary lightning protection per IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances), ESD/EFT immunity per IEC 61000-4-2/4-4, and high-reliability avionics transients where low thermal resistance (RθJC = 0.7 °C/W) and moisture sensitivity level 1 are critical.
Technical Context
The MAPLAD18KP8.0CA employs an avalanche diode structure optimized for multi-stroke lightning events per RTCA DO-160 Section 22. Its bidirectional construction enables symmetrical clamping across both polarities without external circuitry, supporting differential signal line protection in avionics data buses and power inputs.
Thermal design leverages a metal-base package with void-free epoxy body (UL94V-0) and direct junction-to-case conduction path (RθJC = 0.7 °C/W), enabling sustained energy dissipation on FR4 PCBs with recommended pad layout. Surge testing is performed per AEC-Q101 requirements, including 1000 A impulse validation due to equipment limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous operating voltage before clamping begins; matches nominal 5–9 V DC bus or signal lines. |
| V(BR) min/max | 8.89–9.83 V - Breakdown occurs within this range at I(BR); ensures reliable turn-on margin above VWM. |
| VC @ IPP | 13.6 V max at 1324 A - Clamping voltage during worst-case 10/1000 μs surge; protects downstream ICs rated ≥15 V. |
| PPP | 18,000 W @ 10/1000 μs - Peak power handling capability; supports multi-stroke lightning standards like DO-160. |
| RθJC | 0.7 °C/W - Low junction-to-case thermal resistance enables efficient heat transfer to heatsink or copper plane. |
| αV(BR) | ±6.0 mV/°C - Temperature coefficient ensures stable clamping over -55°C to +150°C operating range. |
| ID @ VWM | 450 μA max - Low leakage current minimizes standby power loss in battery-backed or low-power systems. |
Pinout & Package
MAPLAD18KP8.0CA uses a surface-mount plastic package with metal base (cathode side). The device has two terminals: Anode and Cathode. The cathode is the metal base under the body - mounted directly to PCB copper for thermal and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal for unidirectional mode; one polarity node in bidirectional operation | Connected to protected line; forms symmetrical clamping path with cathode in bidirectional configuration. |
| Cathode | Negative terminal / metal base | Must be soldered to large copper area or heatsink; serves as primary thermal conduction path and ground reference. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential interfaces (e.g., RS-485, CAN FD) without polarity concerns. |
| 18 kW peak pulse rating | Meets RTCA DO-160F Section 22 multi-stroke lightning requirements for commercial aircraft electronics. |
| MIL-PRF-19500 upscreening option | Supports high-reliability programs requiring lot traceability, 3σ ID screening, and conformance inspection. |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to reflow, reducing manufacturing cost and risk. |
| AEC-Q101 qualification | Validates robustness for automotive load dump and ISO 7637-2 transient immunity applications. |
Applications
| Avionics Power Input Protection | Automotive ECUs |
|---|---|
Use Scenario: Protecting 28 V DC power inputs in flight control computers and navigation units against lightning-induced surges per DO-160F Waveform 4 (6.4/69 μs). IC Role / Device Role / Timing Role: Primary secondary surge suppression stage placed after input filter and before DC-DC converter. Use Value: Clamps transients to ≤13.6 V while absorbing 18 kW pulses, preventing latch-up or damage to downstream PMICs and microcontrollers. | Use Scenario: Safeguarding engine control unit (ECU) power rails during 12 V automotive load dump events (ISO 7637-2 Pulse 5a/b). IC Role / Device Role / Timing Role: High-energy TVS placed at main power entry point, upstream of fuse and pre-regulator. Use Value: Withstands 1324 A peak current and maintains <13.6 V clamping, ensuring MCU and sensor ICs remain operational during 100 ms transients. |
| Industrial Ethernet Switches | Railway Signaling Interfaces |
Use Scenario: Protecting PoE+ (IEEE 802.3at) data lines and power pairs from induced RFI and EFT bursts in factory-floor switches. IC Role / Device Role / Timing Role: Bidirectional TVS on each twisted pair and power rail, meeting IEC 61000-4-4 Level 4 (4 kV) and IEC 61000-4-5 Class 3 (42 Ω source). Use Value: Symmetrical clamping prevents signal distortion on differential lines while dissipating >10 kW surges without degradation over repeated strikes. | Use Scenario: Securing 72 V DC signaling interfaces in train control systems exposed to traction-induced surges and ESD per EN 50121-3-2. IC Role / Device Role / Timing Role: Secondary protection element on track-side communication ports, coordinated with upstream GDTs. Use Value: Delivers 1324 A peak current handling and 13.6 V clamping at 8.0 V standoff, preserving integrity of RS-422/485 receivers in harsh electromagnetic environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0CA | 600 W PPP rating, 8.0 V VWM, same SMC package footprint but lower surge capacity | Limited to single-stroke or low-duty-cycle industrial surges; not certified for DO-160F Level 4 | Select SMBJ8.0CA only when energy requirements are ≤600 W and aerospace certification is not required. |
| SMCJ8.0CA | 1500 W PPP rating, identical 8.0 V VWM and SMC package, but lacks AEC-Q101 and DO-160F validation | Suitable for general-purpose industrial IEC 61000-4-5 Class 2/3, but not for avionics or automotive safety-critical nodes | Choose SMCJ8.0CA for cost-sensitive non-certified designs where 1.5 kW peak power suffices. |
Compared with SMBJ8.0CA and SMCJ8.0CA, the MAPLAD18KP8.0CA provides 12× and 12× higher peak pulse power respectively, validated AEC-Q101 reliability and RTCA DO-160F compliance - making it the only option for certified multi-stroke lightning protection in aerospace and automotive power systems.
Availability
MAPLAD18KP8.0CA is available at Aetrix Electronics and suitable for avionics power input protection, automotive ECU surge hardening, and industrial Ethernet switch transient immunity requiring stable component supply across extended production lifecycles.
Supply support for MAPLAD18KP8.0CA 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) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing solutions for aerospace, defense, and industrial markets.
The MAPLAD18KP8.0CA belongs to Microsemi's PLAD high-power TVS family, engineered specifically for multi-stroke lightning protection in certified avionics and mission-critical automotive systems where thermal performance and regulatory compliance are non-negotiable.
FAQ
What is the clamping voltage of MAPLAD18KP8.0CA at its rated peak pulse current?
The MAPLAD18KP8.0CA has a maximum clamping voltage (VC) of 13.6 V at its rated peak pulse current (IPP) of 1324 A under 10/1000 μs waveform conditions. This value is guaranteed across the full operating temperature range and ensures downstream components with ≥15 V absolute maximum ratings remain protected during surge events.
Is MAPLAD18KP8.0CA qualified for automotive applications?
Yes, MAPLAD18KP8.0CA is AEC-Q101 qualified and explicitly rated for automotive load dump protection per ISO 7637-2. Its 1324 A peak current capability and 13.6 V clamping voltage make it suitable for protecting ECUs, ADAS modules, and infotainment systems against 12 V system transients.
Does MAPLAD18KP8.0CA require dry packing or baking before reflow soldering?
No, MAPLAD18KP8.0CA has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it can be stored indefinitely at ambient conditions and placed directly into reflow without dry pack or pre-bake. This eliminates process steps and reduces manufacturing risk.
How does the thermal performance of MAPLAD18KP8.0CA compare to standard SMC-package TVS diodes?
MAPLAD18KP8.0CA achieves RθJC = 0.7 °C/W - over 5× better than typical SMC-package TVS diodes (~3.5–4.0 °C/W). This is enabled by its metal-base construction and optimized internal thermal path, allowing higher sustained surge duty cycles on standard FR4 PCBs.
Can MAPLAD18KP8.0CA be used for bidirectional signal line protection such as RS-485?
Yes, MAPLAD18KP8.0CA is a bidirectional TVS (denoted by "CA" suffix) and is commonly deployed on RS-485, CAN FD, and other differential bus lines. Its symmetrical clamping characteristics prevent signal distortion while providing 1324 A surge handling and 13.6 V clamping on both polarities.
MAPLAD18KP8.0CA 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 1324A (1.324kA)
- 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
MAPLAD18KP8.0CA FAQ
1.How can I place an order for MAPLAD18KP8.0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP8.0CA 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 MAPLAD18KP8.0CA reliable?
The price and inventory of MAPLAD18KP8.0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP8.0CA is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP8.0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP8.0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP8.0CA?
MAPLAD18KP8.0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP8.0CA 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 MAPLAD18KP8.0CA?
For technical support, including MAPLAD18KP8.0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP8.0CA requirements.
6.How does Aetrix verify that MAPLAD18KP8.0CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP8.0CA 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 MAPLAD18KP8.0CA meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP8.0CA?
All MAPLAD18KP8.0CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP8.0CA, 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 MAPLAD18KP8.0CA part is unused and in its original packaging.
Return procedure for MAPLAD18KP8.0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP8.0CA Tags
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