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Microchip Technology MPLAD18KP150CA
- Part No.:
- MPLAD18KP150CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP150CA.pdf
- Description:
- TVS DIODE 150VWM 243VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:9,411
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Product details
Overview
MPLAD18KP150CA 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 at ≤243 V under 75 A peak impulse current, and features a 150 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (167–185 V). It meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection requirements.
For engineers reviewing the MPLAD18KP150CA datasheet, MPLAD18KP150CA pinout, MPLAD18KP150CA application, or MPLAD18KP150CA equivalent, key selection criteria include its bidirectional polarity, 150 V working voltage, 243 V max clamping at 75 A, thermal resistance of 0.7 °C/W junction-to-case, and qualification to AEC-Q101 and MIL-PRF-19500 screening levels.
Technical Context
The MPLAD18KP150CA employs an avalanche diode structure optimized for low clamping ratio and fast response (<5 ns), enabling effective suppression of multi-stroke lightning transients per RTCA DO-160 Section 22. Its metal-base package provides direct thermal path to heatsink, supporting sustained surge handling under 0.05% duty cycle.
It operates across –55 °C to +150 °C junction temperature range and maintains stable V(BR) with αV(BR) = 183 mV/°C. Standby leakage is limited to 10 μA at 150 V, ensuring minimal system loading during normal operation while retaining robust ESD (IEC 61000-4-2) and EFT (IEC 61000-4-4) immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous DC or peak AC voltage the device blocks without conduction |
| V(BR) min/max | 167–185 V @ I(BR) - Confirmed avalanche breakdown window ensures predictable turn-on margin above VWM |
| VC @ IPP | 243 V @ 75 A - Clamping voltage limits downstream circuit stress during 10/1000 μs surge events |
| PPP | 18,000 W @ 10/1000 μs - Enables single-device protection against severe lightning-induced surges |
| RθJC | 0.7 °C/W - Low thermal resistance allows efficient heat transfer to PCB/heatsink, critical for repeated surge duty |
| ID @ VWM | 10 μA - Ultra-low leakage preserves signal integrity and battery life in always-on systems |
| Polarity | Bidirectional - Protects AC-coupled or differential lines without polarity constraints |
Pinout & Package
Package: Surface-mount DO-214AB (SMC) with metal baseplate for thermal conduction; dimensions 11.94 × 5.85 × 2.44 mm (L × W × H); weight ≈1 g; RoHS-compliant matte-tin plating; cathode marked on metal base.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface) | Transient current entry point (bidirectional) | Accepts surge current from either polarity; symmetric conduction enables AC line protection |
| Cathode (metal base) | Thermal & electrical return path | Directly mounted to copper pour or heatsink; primary thermal dissipation interface |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW peak pulse rating | Single-device solution for DO-160F Level 4 pin injection and IEC 61000-4-5 Class 5 lightning protection |
| 0.7 °C/W RθJC | Enables >1000 surge cycles at 0.05% duty factor when mounted per recommended pad layout |
| Bidirectional construction (CA suffix) | Eliminates need for polarity-aware placement in differential bus or AC power input stages |
| AEC-Q101 qualified | Validated reliability for automotive under-hood and powertrain applications requiring extended temperature operation |
| Moisture sensitivity Level 1 | No dry-pack or bake-out required prior to reflow, reducing manufacturing overhead and risk of popcorning |
Applications
| Aerospace Avionics Power Input | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC power feed to flight control computers exposed to DO-160F Waveform 4 (6.4/69 μs) lightning-induced transients. IC Role / Device Role / Timing Role: Primary bidirectional TVS clamp at main power entry point, absorbing multi-kW surges before they reach DC/DC converters. Use Value: Meets Level 4 pin injection requirement up to 150 V VWM, limiting downstream voltage excursion to ≤243 V during 75 A transients. | Use Scenario: 12 V/24 V battery rail in commercial vehicles subjected to ISO 7637-2 Pulse 5a load dump events. IC Role / Device Role / Timing Role: High-power transient suppressor placed upstream of power management ICs and microcontrollers. Use Value: Withstands 18,000 W surges and clamps at 243 V, protecting sensitive electronics from 120 V spikes lasting up to 400 ms. |
| Industrial Motor Drive DC Bus | Telecom Base Station AC/DC Front-End |
Use Scenario: DC link between rectifier and inverter in variable-frequency drives operating in electrically noisy factory environments. IC Role / Device Role / Timing Role: Secondary surge protector across bulk capacitor bank, suppressing switching-induced transients and induced RFI. Use Value: 150 V VWM matches typical 200 V DC bus derated for ripple; 243 V clamping prevents overvoltage shutdown of IGBT gate drivers. | Use Scenario: AC input stage of outdoor telecom power supplies subject to IEC 61000-4-5 42 Ω source impedance lightning surges (Class 1–5). IC Role / Device Role / Timing Role: Bidirectional TVS across L-N and L/N-PE, providing coordinated protection with MOVs and gas discharge tubes. Use Value: 18 kW rating and 243 V clamping enable compact, high-reliability front-end design meeting global telecom safety standards. |
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, 200 V VC @ 30 A, DO-214AA package, RθJC ≈ 15 °C/W | Lower energy handling; suitable only for light-duty IEC 61000-4-4/4-5 Class 2–3, not DO-160F Level 4 | Select SMBJ150CA only for cost-sensitive, low-surge-risk consumer-grade designs where 18 kW capability is unnecessary. |
| SMCJ150CA | 1500 W PPP rating, 243 V VC @ 65 A, same DO-214AB package, RθJC ≈ 2.5 °C/W | Lacks AEC-Q101 qualification and DO-160F validation; insufficient for aircraft-level multi-stroke lightning testing | Choose SMCJ150CA for industrial controls needing higher surge margin than SMBJ but without aerospace certification requirements. |
Compared with SMBJ150CA and SMCJ150CA, the MPLAD18KP150CA delivers 30× and 12× higher peak pulse power respectively, validated clamping performance under RTCA DO-160F, and lower thermal resistance-making it the sole option for certified aerospace and high-reliability automotive load dump protection.
Availability
MPLAD18KP150CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain, and industrial motor drive applications requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MPLAD18KP150CA 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 MPLAD18KP150CA belongs to Microsemi's PLAD high-power TVS family, engineered specifically for certified lightning and load dump protection in mission-critical systems where failure is not an option.
FAQ
What is the maximum clamping voltage of the MPLAD18KP150CA under standard test conditions?
The MPLAD18KP150CA has a maximum clamping voltage (VC) of 243 V when subjected to a 75 A peak impulse current with a 10/1000 μs waveform. This value is measured per Figure 3 in the RF01215 datasheet and defines the upper voltage limit imposed on protected circuits during surge events. The MPLAD18KP150CA maintains this clamping performance across its full operating temperature range.
Does the MPLAD18KP150CA meet automotive qualification standards?
Yes, the MPLAD18KP150CA is qualified to AEC-Q101 for stress testing including HTSL, TCT, and surge. It is rated for operation from –55 °C to +150 °C and supports automotive load dump protection per ISO 7637-2 Pulse 5a. The MPLAD18KP150CA also undergoes 3σ lot norm screening on standby current (ID), confirming consistency in leakage performance across production lots.
How does the MPLAD18KP150CA differ from unidirectional variants like MPLAD18KP150A?
The MPLAD18KP150CA is bidirectional, meaning it conducts symmetrically for both positive and negative transients, whereas MPLAD18KP150A is unidirectional and conducts only in reverse bias. The CA suffix denotes bidirectional construction, critical for AC-coupled interfaces or differential buses. Both share identical VWM (150 V), PPP (18,000 W), and package, but the MPLAD18KP150CA eliminates polarity-dependent layout constraints.
What thermal management is required for reliable operation of the MPLAD18KP150CA?
The MPLAD18KP150CA requires mounting on a minimum 1-inch² copper pour (2 oz) or external heatsink per the recommended pad layout in RF01215. Its 0.7 °C/W junction-to-case thermal resistance demands low-impedance thermal path to dissipate 18 kW pulses. Derating begins above 100 °C case temperature; Figure 6 shows PPP vs. TL curve. Proper thermal design ensures >1000 surge cycles at 0.05% duty factor.
Is the MPLAD18KP150CA compliant with RoHS and moisture sensitivity requirements?
Yes, the MPLAD18KP150CA is RoHS compliant (e3 marking) and classified as Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions without dry packing or baking prior to reflow soldering. Its void-free UL94V-0 epoxy body and annealed matte-tin terminals ensure process compatibility and long-term reliability in automated assembly.
MPLAD18KP150CA 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
MPLAD18KP150CA FAQ
1.How can I place an order for MPLAD18KP150CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP150CA 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 MPLAD18KP150CA reliable?
The price and inventory of MPLAD18KP150CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP150CA is usually 5 days.
3.What payment methods are accepted for MPLAD18KP150CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP150CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP150CA?
MPLAD18KP150CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP150CA 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 MPLAD18KP150CA?
For technical support, including MPLAD18KP150CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP150CA requirements.
6.How does Aetrix verify that MPLAD18KP150CA is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP150CA 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 MPLAD18KP150CA meets industry standards.
7.What is the process for return or replacement of MPLAD18KP150CA?
All MPLAD18KP150CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP150CA, 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 MPLAD18KP150CA part is unused and in its original packaging.
Return procedure for MPLAD18KP150CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP150CA Tags
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