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Microchip Technology MAPLAD18KP150CA
- Part No.:
- MAPLAD18KP150CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP150CA.pdf
- Description:
- TVS DIODE 150VWM 243VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,491
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Product details
Overview
MAPLAD18KP150CA 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, features a 150 V reverse standoff voltage (VWM), clamps to ≤243 V at 75 A peak impulse current (IPP), and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MAPLAD18KP150CA datasheet, MAPLAD18KP150CA pinout, MAPLAD18KP150CA application, or MAPLAD18KP150CA equivalent, key selection criteria include its bidirectional polarity, 0.7 °C/W junction-to-case thermal resistance, IEC 61000-4-5 Class 2–5 secondary lightning compliance, and suitability for pin-injection protection per DO-160F Waveform 4 up to Level 4.
Technical Context
The MAPLAD18KP150CA operates as a silicon avalanche diode-based TVS, leveraging controlled breakdown behavior to clamp transients within nanoseconds. Its bidirectional construction enables symmetrical clamping for AC-coupled or floating signal lines, and its low RθJC (0.7 °C/W) supports direct mounting to heatsinks for sustained multi-pulse operation under thermal constraints.
It is characterized for IEC 61000-4-5 testing with 2 Ω, 12 Ω, and 42 Ω source impedances, and validated for RTCA DO-160F Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs) at specified levels-enabling use in avionics power and data line protection where waveform fidelity and repetition tolerance are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 150 V - maximum continuous operating voltage before clamping initiates |
| Clamping Voltage (VC) | 243 V @ IPP = 75 A - limits downstream circuit voltage during worst-case surge |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to PCB copper or external heatsink |
| Breakdown Voltage (V(BR)) | 167–185 V @ I(BR) - defines precise avalanche onset threshold for predictable clamping |
| Standby Current (ID) | 10 μA @ VWM - negligible leakage ensures no system power drain during normal operation |
| Temperature Coefficient (αV(BR)) | 183 mV/°C - quantifies V(BR) drift over temperature for precision design margining |
Pinout & Package
MAPLAD18KP150CA uses a surface-mount plastic package with metal base cathode termination. The device has two terminals: anode and cathode, with polarity marked by the metal base (cathode) on the bottom surface per manufacturer documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal for bidirectional conduction | Connected to protected line; conducts during both positive and negative transients |
| Cathode (Metal Base) | Negative terminal / thermal path | Mounted directly to PCB copper pour or heatsink; serves as primary thermal dissipation interface |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables symmetric protection of AC signals or ungrounded buses without polarity constraints |
| DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin injection surges up to 150 V VWM devices, critical for avionics data links |
| IEC 61000-4-5 Class 5 support (42 Ω) | Meets highest severity secondary lightning immunity for aircraft power distribution systems |
| RoHS-compliant e3 plating | Tin-lead-free matte tin terminations ensure lead-free assembly compatibility and solderability per MIL-STD-750 |
| Moisture Sensitivity Level 1 | No dry pack required per J-STD-020B - simplifies handling and eliminates bake-out prior to reflow |
Applications
| Aircraft Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC main bus in commercial transport aircraft subjected to multi-stroke lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary transient suppression device placed at bus entry point to limit voltage excursion below 250 V. Use Value: Prevents damage to upstream DC-DC converters and downstream avionics modules during repeated 18 kW surges. | Use Scenario: 12 V/24 V vehicle electrical system exposed to ISO 7637-2 Load Dump events up to 120 V. IC Role / Device Role / Timing Role: High-power TVS shunting surge energy away from engine control units (ECUs) and infotainment head units. Use Value: Clamps 150 V transients to ≤243 V within <5 ns, protecting sensitive microcontrollers without derating. |
| Avionics Data Line Protection | Industrial Motor Drive DC Bus |
Use Scenario: ARINC 429 or MIL-STD-1553 data lines requiring pin-injection immunity per DO-160F Waveform 4. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pairs to suppress common-mode surges without distorting signal integrity. Use Value: Maintains signal fidelity while meeting Level 4 immunity (≥150 V test level) due to sub-5 ns response time. | Use Scenario: 300–400 V DC link in variable-frequency drives subjected to switching-induced transients and regenerative energy spikes. IC Role / Device Role / Timing Role: Secondary clamping device parallel to bulk capacitors to absorb fast-rising edge transients exceeding capacitor dV/dt rating. Use Value: Absorbs 18 kW pulses without degradation, extending capacitor lifetime and preventing IGBT gate driver latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150CA | 600 W PPP rating, SMC package, 0.35 °C/W RθJC, lower clamping (243 V same, but at only 3.5 A IPP) | Not suitable for DO-160 multi-stroke or IEC 61000-4-5 Class 4/5; limited to single-event consumer-grade surges | Select only for cost-sensitive, low-energy industrial controls where 18 kW capability is unnecessary |
| SMCJ150CA | 1500 W PPP, SMC package, RθJC ≈ 0.5 °C/W, clamps at 243 V @ 6.2 A IPP | Validated for IEC 61000-4-5 Class 3 (42 Ω), but fails Class 4/5 and DO-160F Waveform 4 Level 4 | Acceptable for automotive ECU protection where load dump is the sole threat, but not for aviation or multi-pulse environments |
Compared with SMBJ150CA and SMCJ150CA, the MAPLAD18KP150CA provides 30× and 12× higher peak pulse power respectively, enabling reliable multi-stroke operation in safety-critical aerospace platforms where cumulative heating and waveform fidelity are design-determining factors.
Availability
MAPLAD18KP150CA is available at Aetrix Electronics and suitable for aircraft power systems, automotive electronic control units, avionics data interfaces, and industrial motor drive DC links requiring stable component supply across extended production lifecycles.
Supply support for MAPLAD18KP150CA 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, timing, and radiation-hardened solutions for aerospace, defense, and industrial markets.
The MAPLAD18KP150CA belongs to Microsemi's high-power PLAD family, engineered specifically for multi-stroke lightning and load dump protection in mission-critical platforms where thermal robustness, waveform compliance, and long-term reliability are non-negotiable.
FAQ
What is the clamping voltage of MAPLAD18KP150CA at its rated peak pulse current?
The MAPLAD18KP150CA has a maximum clamping voltage (VC) of 243 V when subjected to its peak impulse current (IPP) of 75 A 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 circuits during worst-case surge events.
Is MAPLAD18KP150CA compliant with RTCA DO-160F for avionics applications?
Yes, MAPLAD18KP150CA is validated for RTCA DO-160F Section 22 multi-stroke lightning and Waveform 4 (6.4/69 μs) up to Level 4. Its bidirectional construction and 18 kW rating make it suitable for primary and secondary protection in commercial aircraft power and data systems per the specification.
Does MAPLAD18KP150CA require moisture preconditioning before reflow soldering?
No, MAPLAD18KP150CA is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ambient conditions and does not require dry packing or baking prior to surface-mount reflow. This simplifies manufacturing logistics and reduces process risk.
What is the thermal resistance from junction to case for MAPLAD18KP150CA?
The junction-to-case thermal resistance (RθJC) of MAPLAD18KP150CA is 0.7 °C/W, measured with the device mounted on a FR4 PCB using the recommended pad layout. This low value enables effective heat transfer to the PCB copper or external heatsink, supporting multi-pulse operation without thermal runaway.
Can MAPLAD18KP150CA be used for IEC 61000-4-5 Class 5 surge immunity?
Yes, MAPLAD18KP150CA is certified for IEC 61000-4-5 secondary lightning protection at Class 5 when tested with a 42 Ω source impedance. This qualifies it for use in high-end industrial and aerospace power distribution systems where the most severe surge immunity is mandated.
MAPLAD18KP150CA 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):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 243V
- Current - Peak Pulse (10/1000µs):
- 75A
- 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
MAPLAD18KP150CA FAQ
1.How can I place an order for MAPLAD18KP150CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP150CA 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 MAPLAD18KP150CA reliable?
The price and inventory of MAPLAD18KP150CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP150CA is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP150CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP150CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP150CA?
MAPLAD18KP150CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP150CA 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 MAPLAD18KP150CA?
For technical support, including MAPLAD18KP150CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP150CA requirements.
6.How does Aetrix verify that MAPLAD18KP150CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP150CA 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 MAPLAD18KP150CA meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP150CA?
All MAPLAD18KP150CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP150CA, 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 MAPLAD18KP150CA part is unused and in its original packaging.
Return procedure for MAPLAD18KP150CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP150CA 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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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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Toshiba Semiconductor and Storage
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