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Microchip Technology MPLAD18KP8.0AE3
- Part No.:
- MPLAD18KP8.0AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP8.0AE3.pdf
- Description:
- TVS DIODE 8VWM 13.6VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,846
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Product details
Overview
MPLAD18KP8.0AE3 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, clamps to ≤13.6 V at 1324 A peak current, and features 7.0 V reverse standoff voltage (VWM), 8.89–9.83 V breakdown voltage (V(BR)), and 0.7 °C/W junction-to-case thermal resistance.
For engineers reviewing the MPLAD18KP8.0AE3 datasheet, MPLAD18KP8.0AE3 pinout, MPLAD18KP8.0AE3 application, or MPLAD18KP8.0AE3 equivalent, key selection criteria include its DO-160F Waveform 4 Level 4 compliance, IEC 61000-4-5 Class 1–5 secondary lightning protection capability, low-profile thermoset epoxy package with metal base cathode, and RoHS-compliant matte-tin plating.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, activating when transient voltage exceeds its V(BR) threshold to divert surge current away from sensitive components. Its metal-base construction enables direct thermal coupling to heatsinks, supporting sustained energy handling under multi-stroke lightning conditions per RTCA DO-160 Section 22.
The device meets AEC-Q101 stress testing requirements and supports MIL-PRF-19500 upscreening options. Its 100 ps response time ensures effective suppression of fast-rising transients, while its 50 °C/W junction-to-ambient thermal resistance reflects optimized PCB pad layout per recommended footprint.
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) | 7.0 V - maximum continuous DC or RMS operating voltage before conduction |
| Breakdown Voltage (V(BR)) | 8.89–9.83 V @ I(BR) - precise turn-on threshold for predictable clamping onset |
| Clamping Voltage (VC) | 13.6 V @ 1324 A - limits downstream voltage stress during worst-case surge |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to external heatsink or copper plane |
| Standby Current (ID) | 450 μA @ VWM - negligible leakage in normal operation, preserving system efficiency |
| Response Time | <100 ps - activates before most semiconductor damage mechanisms initiate |
Pinout & Package
Package: Surface-mount thermoset epoxy case (UL94V-0), void-free molded body with metal base cathode terminal; dimensions 12.32 × 10.54 × 5.08 mm (L × W × H); weight ≈1 g; polarity marked by cathode on metal base underside.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive input terminal | Connected to protected line; conducts only during forward-biased surge events |
| Cathode (Metal Base) | Ground/reference terminal | Primary thermal path to PCB copper or heatsink; must be soldered to large copper area |
Key Features
| Feature | Design Value |
|---|---|
| DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin-injection transients at 25°C - required for avionics interface protection |
| IEC 61000-4-5 Class 1–5 support (42 Ω source) | Enables single-device secondary lightning protection across full industrial equipment classification |
| MIL-PRF-19500 upscreening option | Supports high-reliability screening (M/MA/MXL levels) for mission-critical aerospace deployments |
| Moisture Sensitivity Level 1 | No dry-pack or baking required before reflow - reduces manufacturing overhead and risk of popcorning |
| RoHS-compliant matte-tin plating (e3) | Ensures reliable solderability per MIL-STD-750 Method 2026 and eliminates lead-based process constraints |
Applications
| Aerospace Avionics Power Input | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC power input stage of flight control computers subjected to DO-160F Section 22 lightning-induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed directly at connector entry point to shunt surge energy before it reaches DC-DC converters. Use Value: Limits transient voltage to ≤13.6 V, preventing latch-up or gate oxide rupture in downstream PMICs rated for 16 V absolute max. | Use Scenario: 12 V battery rail in engine control units exposed to ISO 7637-2 Pulse 5a load dump events up to 60 V/100 ms. IC Role / Device Role / Timing Role: Primary overvoltage clamp mounted on power entry PCB layer with direct thermal tie to chassis ground plane. Use Value: Absorbs 18 kW peak energy without degradation, maintaining system uptime where conventional TVS diodes fail catastrophically. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: 400 V DC bus in variable-frequency drives subject to IEC 61000-4-5 surge coupling from nearby contactor switching. IC Role / Device Role / Timing Role: Secondary protection device installed after bulk capacitance to handle residual ringwave energy missed by front-end filters. Use Value: Clamps 42 Ω source impedance surges to safe levels per Class 4 requirements, avoiding false tripping of overvoltage protection circuits. | Use Scenario: 72 V signaling interface between trackside sensors and centralized interlocking systems in EN 50121-4 compliant railway infrastructure. IC Role / Device Role / Timing Role: Bidirectional-capable variant (MPLAD18KP8.0CA) used for differential signal line protection with common-mode surge suppression. Use Value: Provides certified secondary lightning protection across all IEC 61000-4-5 test classes using identical footprint and thermal design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.0A | 600 W PPP rating, 10× lower surge capacity; SMC package with higher RθJA (65 °C/W) | Limited to consumer-grade or non-safety-critical industrial use; fails DO-160F Level 4 validation | Select only for cost-sensitive designs where 18 kW surge immunity is not required |
| SMCJ8.0A | 1500 W PPP rating, same SMC package; lacks DO-160F and MIL-PRF-19500 qualification data | Not validated for aerospace lightning standards; no upscreening path for high-reliability programs | Acceptable for automotive Tier 2 suppliers needing basic ISO 7637-2 compliance without certification traceability |
Compared with SMBJ8.0A and SMCJ8.0A, the MPLAD18KP8.0AE3 provides 30× higher peak pulse power, certified DO-160F compliance, and a metal-base thermal architecture enabling direct heatsink mounting - making it the only viable choice for certified avionics and mission-critical industrial systems.
Availability
MPLAD18KP8.0AE3 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 assurance, and certified surge performance.
Supply support for MPLAD18KP8.0AE3 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 MPLAD18KP8.0AE3 belongs to Microsemi's PLAD family of high-power surface-mount TVS diodes, engineered specifically for certified lightning and load-dump protection in safety-critical systems where failure is not an option.
FAQ
What is the clamping voltage of MPLAD18KP8.0AE3 at its rated peak pulse current?
The MPLAD18KP8.0AE3 has a maximum clamping voltage (VC) of 13.6 V at 1324 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is guaranteed per the manufacturer's electrical characteristics table and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The MPLAD18KP8.0AE3 maintains this clamping performance across its qualified temperature range and after multiple surge strikes when mounted per recommended thermal guidelines.
Does MPLAD18KP8.0AE3 meet DO-160F Section 22 lightning protection requirements?
Yes, the MPLAD18KP8.0AE3 is explicitly validated for RTCA DO-160F Section 22 multi-stroke lightning testing, including Waveform 4 (6.4/69 μs) at Level 4. Its 18,000 W peak pulse power rating, sub-100 ps response time, and metal-base thermal design enable repeatable performance across the required stroke count and repetition rate. The MPLAD18KP8.0AE3 documentation confirms compliance for both unidirectional and bidirectional variants in the PLAD family.
What is the thermal resistance from junction to ambient for MPLAD18KP8.0AE3?
The MPLAD18KP8.0AE3 has a junction-to-ambient thermal resistance (RθJA) of 50 °C/W when mounted on an FR4 PCB using the recommended pad layout. This value assumes standard JEDEC test conditions and reflects real-world board-level dissipation. For thermal design, engineers should prioritize junction-to-case (RθJC = 0.7 °C/W) conduction via the metal base to external heatsinks or internal copper planes, as this path dominates thermal performance in high-energy applications.
Is MPLAD18KP8.0AE3 RoHS compliant and what does the 'E3' suffix indicate?
Yes, the 'E3' suffix in MPLAD18KP8.0AE3 denotes RoHS compliance with annealed matte-tin plating per J-STD-020B moisture sensitivity Level 1. This eliminates the need for dry-packaging or baking prior to reflow soldering and ensures compatibility with lead-free assembly processes. The MPLAD18KP8.0AE3 meets EU RoHS Directive 2011/65/EU and related exemptions, with full material declarations available through Microchip's component database.
Can MPLAD18KP8.0AE3 be used for bidirectional transient suppression?
No - the MPLAD18KP8.0AE3 is a unidirectional TVS diode, with polarity defined by its metal-base cathode. For bidirectional protection, the functionally equivalent part is MPLAD18KP8.0CA (CA suffix). Both share identical PPP, VWM, and thermal specifications, but differ in internal structure and polarity marking. Substituting MPLAD18KP8.0AE3 in a bidirectional application would result in forward conduction during negative transients and potential failure. Always verify polarity against schematic and layout for the MPLAD18KP8.0AE3.
MPLAD18KP8.0AE3 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
MPLAD18KP8.0AE3 FAQ
1.How can I place an order for MPLAD18KP8.0AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP8.0AE3 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 MPLAD18KP8.0AE3 reliable?
The price and inventory of MPLAD18KP8.0AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP8.0AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP8.0AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP8.0AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP8.0AE3?
MPLAD18KP8.0AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP8.0AE3 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 MPLAD18KP8.0AE3?
For technical support, including MPLAD18KP8.0AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP8.0AE3 requirements.
6.How does Aetrix verify that MPLAD18KP8.0AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP8.0AE3 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 MPLAD18KP8.0AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP8.0AE3?
All MPLAD18KP8.0AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP8.0AE3, 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 MPLAD18KP8.0AE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP8.0AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP8.0AE3 Tags
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