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Microchip Technology MPLAD18KP90A
- Part No.:
- MPLAD18KP90A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP90A.pdf
- Description:
- TVS DIODE 9VWM 15.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,420
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Product details
Overview
MPLAD18KP90A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive power systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps at ≤146 V under 1000 A peak impulse current, and features a 90 V reverse standoff voltage (VWM) with 100–111 V breakdown voltage (V(BR)). It is qualified to AEC-Q101 and meets RTCA DO-160F Waveform 4 Level 4 for pin injection protection.
For engineers reviewing the MPLAD18KP90A datasheet, MPLAD18KP90A pinout, MPLAD18KP90A application, or MPLAD18KP90A equivalent, this device is selected for lightning robustness in avionics power rails, load dump suppression in 24 V vehicle ECUs, and secondary IEC 61000-4-5 Class 1–5 protection with 42 Ω source impedance - requiring precise VWM margining, thermal resistance validation (RθJC = 0.7 °C/W), and polarity-aware PCB layout due to cathode-on-base construction.
Technical Context
The MPLAD18KP90A employs an avalanche diode structure optimized for low clamping ratio (VC/V(BR) ≈ 1.31) and sub-100 ps response time, enabling effective suppression of fast-rising transients such as ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and lightning-induced surges. Its thermally enhanced metal-base package minimizes junction-to-case resistance to 0.7 °C/W, supporting high-repetition-rate surge handling when mounted on FR4 with recommended pad layout.
It operates across –55 °C to +150 °C junction temperature range and is rated for 3σ lot norm screening on standby current (ID ≤ 10 μA @ 90 V). Compliance with MIL-PRF-19500 upscreening options (M/MA/MXL levels) and RoHS (e3) plating confirms suitability for high-reliability embedded platforms where traceability and solderability per MIL-STD-750 method 2026 are mandatory.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains multi-stroke lightning events per RTCA DO-160 Section 22 without degradation |
| Reverse Standoff Voltage (VWM) | 90 V - sets maximum continuous operating voltage before conduction; matches 24 V system rails with ≥3× safety margin |
| Breakdown Voltage (V(BR)) | 100–111 V @ I(BR) - defines guaranteed avalanche onset threshold for predictable clamping behavior |
| Max Clamping Voltage (VC) | 146 V @ IPP = 1000 A - limits downstream component stress during worst-case surge; clamping ratio = 1.46 |
| Thermal Resistance (RθJC) | 0.7 °C/W - enables efficient heat transfer to heatsink or copper plane, critical for >0.05% duty cycle applications |
| Standby Current (ID) | ≤10 μA @ 90 V - ensures negligible leakage in always-on power monitoring circuits |
| Junction Temperature Range | –55 °C to +150 °C - supports operation in engine bay, avionics bays, and industrial control enclosures |
Pinout & Package
Package: Surface-mount PLAD (Plastic Low-profile Anode-down) with metal base cathode termination. Void-free UL94V-0 epoxy body; tin-lead or RoHS-compliant matte-tin plating; polarity marked by cathode on bottom metal surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface pad) | Positive input terminal | Soldered to PCB trace; carries surge current into device during forward-biased transient events |
| Cathode (metal base) | Ground reference / return path | Must be connected to low-impedance thermal plane or heatsink; serves as primary thermal and electrical return |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile metal-base construction | Enables direct thermal coupling to PCB copper or heatsink, reducing RθJA to 50 °C/W on FR4 |
| AEC-Q101 qualification | Validates reliability for automotive ECU power inputs subject to load dump and cold-crank conditions |
| RTCA DO-160F Waveform 4 Level 4 compliance | Guarantees survivability against 6.4/69 μs pin-injected transients at 25 °C in aircraft systems |
| IEC 61000-4-5 Class 1–5 support (42 Ω Zs) | Meets secondary lightning immunity requirements for industrial and avionics power distribution units |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to reflow, simplifying SMT assembly |
Applications
| Avionics Power Input Protection | Commercial Vehicle ECU Load Dump Suppression |
|---|---|
Use Scenario: Protecting 28 V DC power inputs of flight control computers and navigation radios from lightning-induced surges per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS placed upstream of DC-DC converters to clamp transients before they reach sensitive regulation circuitry. Use Value: 18,000 W PPP rating and 146 V clamping ensure <100 ns response preserves integrity of 28 V rail during multi-stroke events. | Use Scenario: Safeguarding 24 V microcontroller power supplies in heavy-duty truck ECUs during alternator load dump events (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Primary surge shunt located at battery feed entry point, absorbing energy before it propagates through board-level filtering. Use Value: 90 V VWM provides ≥3× margin over nominal 24 V, while 0.7 °C/W RθJC enables sustained operation without thermal runaway. |
| Industrial Motor Drive DC Bus Protection | Railway Signaling Power Interface |
Use Scenario: Secondary surge protection on 90–110 V DC bus lines feeding servo drives in factory automation systems exposed to switching transients and induced RFI. IC Role / Device Role / Timing Role: Parallel-connected TVS providing fast clamping to limit voltage overshoot during IGBT turn-off spikes. Use Value: 100–111 V V(BR) aligns precisely with bus operating range, minimizing false triggering while ensuring robust clamping at 146 V. | Use Scenario: Protecting 96 V DC signaling interfaces in railway trackside electronics subjected to lightning coupling via long cable runs. IC Role / Device Role / Timing Role: Front-end transient suppressor on power entry module compliant with EN 50121-4 for electromagnetic compatibility. Use Value: IEC 61000-4-5 Class 4 support with 42 Ω source impedance validates performance under standardized rail industry surge test profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | 600 W PPP rating, SMB package, RθJC = 15 °C/W, VWM = 90 V, VC = 146 V @ 32.4 A | Lower energy handling; suitable only for single-stroke, low-repetition surges (e.g., ESD/EFT), not lightning or load dump | Select SMBJ90A only when surge energy is <1% of MPLAD18KP90A's capability and thermal constraints permit higher junction rise |
| SMCJ90A | 1500 W PPP rating, SMC package, RθJC = 3.5 °C/W, VWM = 90 V, VC = 146 V @ 433 A | Intermediate energy rating; lacks RTCA DO-160F Waveform 4 Level 4 validation and AEC-Q101 qualification | Choose SMCJ90A for cost-sensitive industrial controls where full lightning robustness is not mandated |
Compared with SMBJ90A and SMCJ90A, the MPLAD18KP90A delivers 30× and 12× higher peak pulse power respectively, with superior thermal management (RθJC = 0.7 °C/W) and certified compliance for aviation and automotive safety-critical surge environments - making it irreplaceable where multi-stroke lightning or load dump immunity is non-negotiable.
Availability
MPLAD18KP90A is available at Aetrix Electronics and suitable for avionics power input protection, commercial vehicle ECU load dump suppression, and industrial motor drive DC bus protection requiring stable component supply across extended production lifecycles.
Supply support for MPLAD18KP90A 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, communications, and industrial markets, with emphasis on radiation-hardened ICs, timing devices, and power protection components.
The MPLAD18KP90A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning resilience and automotive load dump survival in mission-critical power interfaces.
FAQ
What is the clamping voltage of MPLAD18KP90A at its rated peak pulse current?
The MPLAD18KP90A has a maximum clamping voltage (VC) of 146 V when subjected to a 1000 A peak impulse current (IPP) under 10/1000 μs waveform conditions. This value is measured at the device terminals and represents the upper voltage limit imposed on protected circuitry during worst-case surge events. The clamping performance is validated per Figure 3 in RF01215 Rev B and is critical for ensuring downstream components remain within safe operating voltage margins.
Is MPLAD18KP90A suitable for bidirectional signal line protection?
No, the MPLAD18KP90A is a unidirectional TVS diode, with cathode on the metal base and anode on the top surface pad. It conducts only during reverse-biased overvoltage events. For bidirectional protection, Microsemi offers the MPLAD18KP90CA variant. Using MPLAD18KP90A on AC or bipolar signal lines would result in forward conduction during normal operation and potential failure. Always verify polarity alignment in schematic and layout for MPLAD18KP90A.
Does MPLAD18KP90A require special PCB layout considerations?
Yes - the MPLAD18KP90A requires a dedicated thermal pad layout per RF01215 Rev B Package Dimensions (Page 7). Its metal base cathode must connect to a large, low-thermal-resistance copper area (≥1000 mm² recommended) to achieve the specified RθJC = 0.7 °C/W. Trace inductance between the device and protected node must be minimized (<5 nH), and no vias should interrupt the cathode thermal path. Failure to follow the recommended pad layout degrades both surge endurance and thermal stability of MPLAD18KP90A.
What standards does MPLAD18KP90A comply with for lightning protection?
The MPLAD18KP90A complies with RTCA DO-160F Section 22 for multi-stroke lightning (Waveform 4 Level 4), IEC 61000-4-5 for secondary lightning (Class 1–5 with 42 Ω source impedance), and IEC 61000-4-2/4-4 for ESD and EFT. These certifications are explicitly listed in RF01215 Rev B and confirmed via surge testing per AEC-Q101. Compliance is inherent to the MPLAD18KP90A design and does not require external circuitry or derating for standard test conditions.
Can MPLAD18KP90A be used in RoHS-compliant assemblies?
Yes - the MPLAD18KP90A is available in RoHS-compliant version with e3 matte-tin plating, fully compliant with IPC/JEDEC J-STD-020B moisture sensitivity Level 1 (no dry pack required). The e3 suffix denotes RoHS compliance and is standard for new production lots. Non-RoHS versions (blank suffix) are obsolete. All current MPLAD18KP90A units shipped by Aetrix Electronics meet RoHS Directive 2011/65/EU requirements without exception.
MPLAD18KP90A 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 1169A (1.169kA)
- 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
MPLAD18KP90A FAQ
1.How can I place an order for MPLAD18KP90A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP90A 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 MPLAD18KP90A reliable?
The price and inventory of MPLAD18KP90A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP90A is usually 5 days.
3.What payment methods are accepted for MPLAD18KP90A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP90A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP90A?
MPLAD18KP90A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP90A 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 MPLAD18KP90A?
For technical support, including MPLAD18KP90A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP90A requirements.
6.How does Aetrix verify that MPLAD18KP90A is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP90A 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 MPLAD18KP90A meets industry standards.
7.What is the process for return or replacement of MPLAD18KP90A?
All MPLAD18KP90A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP90A, 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 MPLAD18KP90A part is unused and in its original packaging.
Return procedure for MPLAD18KP90A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP90A Tags
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