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Microchip Technology MPLAD18KP8.0A
- Part No.:
- MPLAD18KP8.0A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP8.0A.pdf
- Description:
- TVS DIODE 8VWM 13.6VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,427
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Product details
Overview
MPLAD18KP8.0A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power rails. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 8.0 V reverse standoff voltage (VWM), clamps to ≤13.6 V at 1324 A peak current, and operates across –55°C to +150°C junction temperature. It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection for Waveform 4.
For engineers reviewing the MPLAD18KP8.0A datasheet, MPLAD18KP8.0A pinout, MPLAD18KP8.0A application, or MPLAD18KP8.0A equivalent, key selection criteria include its 8.0 V VWM rating, 1324 A IPP capability, low 0.7 °C/W junction-to-case thermal resistance, RoHS-compliant e3 plating, and qualification for lightning-level secondary protection per IEC 61000-4-5 with 42 Ω source impedance.
Technical Context
The MPLAD18KP8.0A employs a silicon avalanche diode structure optimized for fast response (<100 ps turn-on) and high-energy absorption without degradation under multi-stroke transients. Its metal-base cathode construction enables direct thermal coupling to heatsinks, supporting sustained operation under repetitive surges at ≤0.05% duty factor.
It is characterized for clamping performance at 10/1000 μs waveform and validated for RTCA DO-160 Section 22 multi-stroke lightning compliance. Standby leakage (ID) is screened to 3σ lot norm at VWM, and thermal derating follows a defined curve up to 100°C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous DC or peak AC voltage the device blocks without conduction |
| V(BR) min/max | 8.89–9.83 V - Breakdown occurs within this range at 5 mA, ensuring predictable clamping onset |
| VC @ IPP | 13.6 V - Clamping voltage at 1324 A peak pulse, limiting downstream voltage stress |
| IPP | 1324 A - Peak surge current it safely diverts at 10/1000 μs, enabling robust load dump protection |
| RθJC | 0.7 °C/W - Low thermal resistance from junction to case, allowing efficient heat transfer to PCB/heatsink |
| PPP | 18,000 W - Peak pulse power handling at 10/1000 μs, meeting DO-160 lightning multi-stroke requirements |
| ID @ VWM | 450 μA - Low leakage ensures minimal standby power loss in battery-backed or low-power systems |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anode Down) with metal base cathode on bottom; void-free UL94V-0 epoxy body; tin-lead or RoHS-compliant matte-tin plating; weight ≈1 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top side) | Positive terminal for unidirectional conduction | Soldered to PCB trace; carries surge current into device during overvoltage events |
| Cathode (Metal base) | Negative terminal / Heat sink interface | Mounted directly to copper pour or heatsink; primary thermal path for energy dissipation |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW peak pulse power | Enables single-device protection against severe automotive load dump and aircraft lightning-induced transients |
| 0.7 °C/W RθJC | Supports high-reliability operation without external heatsink under pulsed conditions when mounted per recommended pad layout |
| AEC-Q101 qualified | Validated for automotive under-hood applications including engine control units and battery management systems |
| RTCA DO-160F Level 4 pin injection | Meets stringent airborne equipment immunity requirements for Waveform 4 (6.4/69 μs) at 25°C |
| IEC 61000-4-5 Class 1–5 compliance | Provides secondary lightning protection with 42 Ω source impedance across full VWM range (7.0–200 V) |
Applications
| Aerospace Avionics Power Protection | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC power inputs of flight-critical avionics modules from lightning-induced transients per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS placed at board edge to clamp surges before they reach DC-DC converters and microcontrollers. Use Value: Withstands multi-stroke lightning pulses up to 18,000 W and maintains clamping below 13.6 V, preserving system uptime and certification integrity. | Use Scenario: Safeguarding 12 V/24 V power rails in engine control units exposed to alternator load dump spikes during battery disconnection. IC Role / Device Role / Timing Role: Primary surge suppression element located upstream of LDOs and CAN transceivers. Use Value: Absorbs 1324 A peak current while limiting rail overshoot to ≤13.6 V, preventing latch-up or damage to sensitive logic. |
| Industrial Motor Drive DC Bus | Railway Signaling Power Interface |
Use Scenario: Protecting DC bus inputs of variable-frequency drives from switching transients generated by IGBT commutation and regenerative braking. IC Role / Device Role / Timing Role: High-power TVS connected between DC+ and chassis ground to shunt inductive kickback energy. Use Value: 0.7 °C/W thermal resistance allows direct mounting to metal chassis, enabling reliable operation without forced air cooling. | Use Scenario: Securing 72 V DC signaling interfaces in railway trackside electronics against EFT bursts and induced surges from nearby traction currents. IC Role / Device Role / Timing Role: Secondary protection device compliant with IEC 61000-4-4 (EFT) and IEC 61000-4-5 (lightning) at 42 Ω source impedance. Use Value: 450 μA max ID at 8.0 V VWM minimizes quiescent loading on isolated power supplies in safety-critical signaling circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0A | 600 W PPP rating, 5.0 A IPP, SMA package, RθJA = 110 °C/W | Intended for low-energy ESD/EFT; insufficient for DO-160 lightning or automotive load dump | Select only for cost-sensitive consumer-grade designs with sub-1 kA surge requirements |
| SMCJ8.0A | 1500 W PPP rating, 113 A IPP, SMC package, RθJA = 17 °C/W, no AEC-Q101 or DO-160 validation | Used in industrial power supplies; lacks aerospace qualification and multi-stroke endurance data | Consider for non-certified industrial controls where full lightning compliance is not mandated |
Compared with SMAJ8.0A and SMCJ8.0A, the MPLAD18KP8.0A provides 30× higher peak pulse power and certified multi-stroke lightning resilience-critical for aerospace and automotive safety systems where single-point failure is unacceptable.
Availability
MPLAD18KP8.0A is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU power protection, and industrial motor drive DC bus applications requiring stable component supply, long-term lifecycle support, and certified surge immunity.
Supply support for MPLAD18KP8.0A 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 (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 MPLAD18KP8.0A belongs to Microsemi's high-power PLAD family, engineered specifically for certified lightning and load dump protection in mission-critical platforms where thermal performance, multi-stroke endurance, and regulatory compliance are non-negotiable.
FAQ
What is the clamping voltage of the MPLAD18KP8.0A at its rated peak pulse current?
The MPLAD18KP8.0A 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 per the datasheet's Electrical Characteristics table and defines the upper voltage limit imposed on protected circuitry during surge events. The MPLAD18KP8.0A maintains this clamping performance across its qualified operating temperature range.
Is the MPLAD18KP8.0A qualified for automotive applications?
Yes, the MPLAD18KP8.0A is explicitly qualified to AEC-Q101 for automotive use. It is rated for junction temperatures from –55°C to +150°C and validated for load dump and switching transient suppression in engine control units and battery management systems. Its construction, screening, and test reports align with automotive reliability requirements, making the MPLAD18KP8.0A suitable for under-hood deployment.
Does the MPLAD18KP8.0A meet RTCA DO-160 lightning standards?
Yes, the MPLAD18KP8.0A is designed and tested to meet RTCA DO-160 Section 22 for multi-stroke lightning-induced transient protection. Specifically, it achieves Level 4 pin injection immunity per Waveform 4 (6.4/69 μs) and supports secondary lightning protection per IEC 61000-4-5 with 42 Ω source impedance (Classes 1–5). These capabilities are documented in Microsemi's RF01215 datasheet for the MPLAD18KP8.0A.
What is the thermal resistance from junction to case for the MPLAD18KP8.0A?
The MPLAD18KP8.0A has a junction-to-case thermal resistance (RθJC) of 0.7 °C/W, measured under standard test conditions. This low value reflects its metal-base package design, which enables efficient heat transfer from the silicon die to the PCB copper pour or external heatsink. Proper mounting per the recommended pad layout is required to achieve this thermal performance in the MPLAD18KP8.0A.
How does the MPLAD18KP8.0A differ from standard SMA or SMC TVS diodes?
The MPLAD18KP8.0A differs fundamentally in power handling, qualification, and thermal architecture: it delivers 18,000 W peak pulse power (vs. ≤1.5 kW for SMCJ/SMAJ), features a metal-base thermal path (RθJC = 0.7 °C/W), and carries AEC-Q101 and RTCA DO-160 certifications. Standard SMA/SMC devices lack multi-stroke lightning validation and cannot sustain the energy levels the MPLAD18KP8.0A is engineered to absorb reliably.
MPLAD18KP8.0A 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):
- 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
MPLAD18KP8.0A FAQ
1.How can I place an order for MPLAD18KP8.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP8.0A 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 MPLAD18KP8.0A reliable?
The price and inventory of MPLAD18KP8.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP8.0A is usually 5 days.
3.What payment methods are accepted for MPLAD18KP8.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP8.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP8.0A?
MPLAD18KP8.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP8.0A 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 MPLAD18KP8.0A?
For technical support, including MPLAD18KP8.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP8.0A requirements.
6.How does Aetrix verify that MPLAD18KP8.0A is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP8.0A 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 MPLAD18KP8.0A meets industry standards.
7.What is the process for return or replacement of MPLAD18KP8.0A?
All MPLAD18KP8.0A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP8.0A, 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 MPLAD18KP8.0A part is unused and in its original packaging.
Return procedure for MPLAD18KP8.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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