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Microchip Technology MPLAD18KP150A
- Part No.:
- MPLAD18KP150A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP150A.pdf
- Description:
- TVS DIODE 150VWM 243VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,840
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Product details
Overview
MPLAD18KP150A 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, clamps at ≤243 V under 10 A IPP, maintains 150 V reverse standoff voltage (VWM), and features 0.7 °C/W junction-to-case thermal resistance - enabling robust secondary lightning protection per IEC 61000-4-5 with 42 Ω source impedance in Class 1–5 applications.
For engineers reviewing the MPLAD18KP150A datasheet, MPLAD18KP150A pinout, MPLAD18KP150A application, or MPLAD18KP150A equivalent, this device is selected for high-reliability DC bus protection where multi-stroke lightning immunity (RTCA DO-160 Section 22), low-profile SMT mounting, and traceable AEC-Q101-compliant manufacturing are mandatory design requirements.
Technical Context
The MPLAD18KP150A operates as a silicon avalanche diode-based TVS, leveraging controlled breakdown at 167–185 V (V(BR) @ I(BR)) to divert transients away from sensitive downstream circuitry. Its metal-base cathode construction minimizes thermal resistance, supporting sustained energy dissipation without thermal runaway when mounted on FR4 with recommended pad layout.
It meets RTCA/DO-160F Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 compliance only up to 130 V VWM - confirming MPLAD18KP150A is validated for Waveform 4 Level 4 but not Waveform 5A Level 4, per Microsemi RF01215 Rev B Table on page 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - enables single-event suppression of lightning-induced surges exceeding 243 V without failure |
| Reverse Standoff Voltage (VWM) | 150 V - maximum continuous DC or peak AC voltage the device blocks during normal operation |
| Breakdown Voltage (V(BR)) | 167–185 V @ I(BR) - precise avalanche initiation range ensures predictable clamping onset |
| Clamping Voltage (VC) | 243 V @ 10 A IPP - limits voltage seen by protected ICs to safe levels during surge events |
| Thermal Resistance (RθJC) | 0.7 °C/W - allows efficient heat transfer to heatsink or PCB copper, critical for repeated surge duty |
| Standby Current (ID) | 10 μA @ 150 V - negligible leakage preserves system efficiency in standby and low-power modes |
| Temperature Range | −55 °C to +150 °C - supports operation in extended-temperature avionics and engine bay environments |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anode Down) with metal base cathode terminal; void-free UL94V-0 epoxy body; tin-lead or RoHS-compliant matte-tin plating; weight ≈1 g; dimensions 12.32 × 10.54 × 5.08 mm (L×W×H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top side) | Transient current entry point | Connected to protected line (e.g., 150 V DC bus); current flows into anode during positive surge |
| Cathode (metal base) | Transient current return path | Mounted directly to PCB ground plane or heatsink; serves as primary thermal and electrical return path |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge testing |
| RTCA DO-160 Section 22 compliant | Proven multi-stroke lightning survivability in aircraft power distribution systems |
| IEC 61000-4-5 Class 1–5 support (42 Ω) | Meets secondary lightning immunity requirements across all severity classes for 150 V systems |
| Moisture Sensitivity Level 1 | No dry pack or baking required before reflow - simplifies SMT assembly and reduces handling cost |
| Wafer and assembly lot traceability | Full process traceability enables root-cause analysis and quality audits for high-integrity programs |
Applications
| Aerospace Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V and 115 V DC distribution networks in commercial aircraft, subject to RTCA DO-160 Section 22 lightning injection. IC Role / Device Role / Timing Role: Primary transient shunt element placed at bus entry points to clamp induced surges before reaching avionics modules. Use Value: Enables compliance with DO-160F Waveform 4 Level 4 at 150 V systems while maintaining <100 ps response time to protect FPGA-based flight control units. | Use Scenario: 12 V/24 V vehicle battery lines exposed to ISO 7637-2 load dump transients up to 120 V. IC Role / Device Role / Timing Role: High-energy TVS placed upstream of DC-DC converters and ECUs to absorb 18 kW surge energy without degradation. Use Value: Prevents latch-up and gate oxide damage in automotive microcontrollers by limiting clamped voltage to 243 V at 10 A, with no derating required below 100 °C case temperature. |
| Industrial Motor Drive DC Bus | Railway Traction Control Interface |
Use Scenario: 150 V DC link in variable-frequency drives subjected to switching-induced transients and EFT bursts. IC Role / Device Role / Timing Role: Unidirectional TVS connected between DC+ and chassis ground to suppress commutation spikes and RFI coupling. Use Value: Achieves IEC 61000-4-4 Level 4 EFT immunity and 42 Ω IEC 61000-4-5 Class 4 compliance without external heatsinking due to 0.7 °C/W RθJC. | Use Scenario: Signaling and auxiliary power interfaces in rolling stock control units operating in EN 50121-3-2 EMC environments. IC Role / Device Role / Timing Role: Secondary surge protector on 110 V auxiliary supply lines, coordinated with upstream MOVs and gas discharge tubes. Use Value: Provides fast-response clamping (<5 ns) and repeatable 18 kW pulse handling to meet rail-specific surge repetition rate requirements (0.05% duty factor). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150A | 600 W PPP rating, 150 V VWM, DO-214AA package, RθJC ≈ 40 °C/W | Limited to single-stroke surges; unsuitable for RTCA DO-160 multi-stroke or IEC 61000-4-5 Class 4/5 | Select only for cost-sensitive, low-energy consumer applications where 18 kW capability is unnecessary |
| SMCJ150A | 1500 W PPP rating, 150 V VWM, DO-214AB package, RθJC ≈ 15 °C/W | Cannot sustain repeated 10/1000 μs surges above 100 A; fails under DO-160 Section 22 test conditions | Acceptable for basic industrial ESD/EFT protection but not certified for aerospace lightning standards |
Compared with SMBJ150A and SMCJ150A, the MPLAD18KP150A delivers 30× and 12× higher peak pulse power respectively, with superior thermal management and formal qualification for aviation-grade multi-stroke lightning - making it the sole option for DO-160F Section 22 and IEC 61000-4-5 Class 1–5 deployment at 150 V.
Availability
MPLAD18KP150A is available at Aetrix Electronics and suitable for aerospace power distribution, automotive load dump protection, and industrial motor drive DC bus applications requiring stable component supply, full lot traceability, and long-term lifecycle continuity.
Supply support for MPLAD18KP150A 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, mixed-signal, and radiation-hardened solutions for aerospace, defense, and industrial markets.
The MPLAD18KP150A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection in safety-critical avionics and transportation systems where AEC-Q101 and RTCA DO-160 compliance are non-negotiable.
FAQ
What is the clamping voltage of MPLAD18KP150A at its rated peak pulse current?
The MPLAD18KP150A has a maximum clamping voltage (VC) of 243 V at 10 A peak pulse current (IPP), measured under 10/1000 μs waveform conditions. This value ensures protected circuitry remains within safe operating voltage limits during high-energy transients. The clamping performance is guaranteed across the full −55 °C to +150 °C junction temperature range, with no additional derating required below 100 °C case temperature.
Is MPLAD18KP150A certified for RTCA DO-160F lightning testing?
Yes, the MPLAD18KP150A is validated for RTCA DO-160F Section 22 Waveform 4 (6.4/69 μs) Level 4 testing at 25 °C. It is explicitly listed in Microsemi RF01215 Rev B for this compliance level. However, it is not rated for Waveform 5A Level 4 - that specification applies only up to MPLAD18KP130CA per the same document.
Does MPLAD18KP150A require dry pack or baking before SMT reflow?
No, the MPLAD18KP150A has IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1 rating, meaning it may be stored indefinitely at ambient conditions without moisture barrier bag packaging or baking. This eliminates pre-reflow bake cycles and simplifies high-volume manufacturing logistics for aerospace and automotive production lines.
What is the thermal resistance from junction to case (RθJC) for MPLAD18KP150A?
The MPLAD18KP150A has a junction-to-case thermal resistance (RθJC) of 0.7 °C/W, measured with the metal base cathode mounted to a heatsink or large copper area. This ultra-low value enables efficient heat extraction during repetitive surge events and supports operation at full 18,000 W PPP without thermal runaway when used with the recommended FR4 pad layout per RF01215 Rev B.
Can MPLAD18KP150A be used in bidirectional configurations?
No, MPLAD18KP150A is a unidirectional TVS. Bidirectional variants carry the "CA" suffix (e.g., MPLAD18KP150CA). The "A" suffix in MPLAD18KP150A explicitly denotes unidirectional polarity, with the cathode on the metal base - using it in AC or bipolar signal paths would result in forward conduction and potential failure during negative half-cycles.
MPLAD18KP150A 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):
- 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
MPLAD18KP150A FAQ
1.How can I place an order for MPLAD18KP150A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP150A 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 MPLAD18KP150A reliable?
The price and inventory of MPLAD18KP150A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP150A is usually 5 days.
3.What payment methods are accepted for MPLAD18KP150A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP150A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP150A?
MPLAD18KP150A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP150A 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 MPLAD18KP150A?
For technical support, including MPLAD18KP150A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP150A requirements.
6.How does Aetrix verify that MPLAD18KP150A is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP150A 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 MPLAD18KP150A meets industry standards.
7.What is the process for return or replacement of MPLAD18KP150A?
All MPLAD18KP150A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP150A, 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 MPLAD18KP150A part is unused and in its original packaging.
Return procedure for MPLAD18KP150A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP150A Tags
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