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Microchip Technology MPLAD18KP7.0A
- Part No.:
- MPLAD18KP7.0A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP7.0A.pdf
- Description:
- TVS DIODE 7VWM 12VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,803
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Product details
Overview
MPLAD18KP7.0A 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 transients to ≤12.0 V at 1500 A, and features a 7.0 V reverse standoff voltage (VWM) with breakdown voltage of 7.78–8.60 V. It is qualified to AEC-Q101 and meets RTCA DO-160F Level 5 pin injection for aircraft avionics.
For engineers reviewing the MPLAD18KP7.0A datasheet, MPLAD18KP7.0A pinout, MPLAD18KP7.0A application, or MPLAD18KP7.0A equivalent, key selection criteria include its 1500 A peak impulse current rating, 0.7 °C/W junction-to-case thermal resistance, bidirectional variant availability (MPLAD18KP7.0CA), and compliance with IEC 61000-4-5 Class 1–5 secondary lightning protection.
Technical Context
The MPLAD18KP7.0A employs an avalanche diode structure optimized for low clamping voltage and minimal thermal resistance. Its metal-base package enables direct heatsinking, supporting sustained surge handling under multi-stroke lightning conditions per RTCA DO-160 Section 22. The device operates with a temperature coefficient of breakdown voltage of +5.0 mV/°C and maintains <100 ps response time from 0 V to V(BR).
It is rated for junction temperatures from –55 °C to +150 °C and exhibits 50 °C/W junction-to-ambient thermal resistance on FR4 PCB with recommended pad layout. Steady-state power dissipation is 2.5 W at 25 °C ambient and derates linearly to 71 W at 100 °C case temperature, enabling integration into thermally constrained avionics and engine control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 18,000 W - sustains full-rated lightning surge energy without failure |
| Reverse Standoff Voltage (VWM) | 7.0 V - maximum continuous DC or peak AC voltage before conduction begins |
| Breakdown Voltage (V(BR)) | 7.78–8.60 V @ I(BR) - defines precise avalanche onset threshold for predictable clamping |
| Max Clamping Voltage (VC) | 12.0 V @ 1500 A - limits downstream circuit voltage during worst-case surge |
| Peak Impulse Current (IPP) | 1500 A - peak current capability at specified 10/1000 μs waveform |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to external heatsink or copper plane |
| Standby Current (ID) | 3000 μA @ VWM - ensures minimal leakage in battery-sensitive systems |
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 metal backside.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Surface Pad) | Input/Line Terminal | Connected to protected line; carries surge current into device during overvoltage events |
| Cathode (Metal Base) | Ground/Reference Terminal | Low-inductance thermal and electrical path to PCB ground plane or heatsink; must be soldered to large copper area |
Key Features
| Feature | Design Value |
|---|---|
| High-reliability wafer lot traceability | Enables full process history tracking for aerospace and defense programs requiring MIL-PRF-19500 upscreening |
| RTCA DO-160F Waveform 4 & 5A compliance | Validated for Level 5 pin injection (6.4/69 μs) and Level 4 (40/120 μs), critical for flight-critical avionics |
| IEC 61000-4-5 secondary lightning protection | Class 1–5 certified with 42 Ω, 12 Ω, and 2 Ω source impedances - covers full range of system-level surge test requirements |
| Moisture Sensitivity Level 1 | No dry pack or baking required prior to reflow - reduces manufacturing overhead and avoids moisture-induced popcorning |
| AEC-Q101 qualification | Validated for automotive under-hood applications including load dump and alternator transients |
Applications
| Avionics Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC power inputs in flight management computers and inertial navigation units against lightning-induced surges per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary transient suppression element placed directly at connector entry point to shunt >1500 A surges before reaching sensitive regulators and FPGAs. Use Value: Enables compliance with Level 5 pin injection testing while maintaining <12.0 V clamping to preserve 3.3 V/5 V logic supply integrity. | Use Scenario: Guarding microcontroller power rails and CAN transceiver interfaces against 12 V automotive load dump events (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input to clamp transients within 100 ps and limit voltage overshoot to safe levels. Use Value: Prevents latch-up and permanent damage to 32-bit ARM-based ECUs operating at 125 °C junction temperature. |
| Railway Signaling Interface | Industrial Motor Drive DC Bus |
Use Scenario: Safeguarding Ethernet PHY and RS-485 transceivers in track-side signaling cabinets exposed to induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), absorbing residual energy and limiting let-through voltage to <12 V. Use Value: Achieves IEC 61000-4-5 Class 4 immunity (4 kV, 42 Ω) without compromising signal integrity on 100 Mbps data lines. | Use Scenario: Protecting gate drivers and current sense amplifiers on 400 V DC bus of variable frequency drives subjected to switching transients and EFT bursts. IC Role / Device Role / Timing Role: Fast-response TVS mounted adjacent to IGBT module terminals to clamp commutation spikes before they propagate to control circuitry. Use Value: Reduces risk of false triggering and desaturation faults by limiting transient overvoltage to ≤12.0 V at 1500 A peak. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A | 600 W PPP rating, 100 A IPP, SMB package, RθJC = 15 °C/W | Not suitable for DO-160 Level 5 or IEC 61000-4-5 Class 5; limited to consumer/industrial grade | Select only for cost-sensitive non-aerospace designs where surge energy is <10% of MPLAD18KP7.0A capability |
| SMCJ7.0A | 1500 W PPP rating, 123 A IPP, SMC package, RθJC = 2.5 °C/W | Lacks RTCA DO-160F validation and AEC-Q101 qualification; no Level 5 pin injection data | Acceptable for automotive infotainment or industrial PLCs where full aerospace certification is not required |
Compared with SMBJ7.0A and SMCJ7.0A, the MPLAD18KP7.0A provides 30× higher peak pulse power, 12× greater impulse current, and certified compliance with aviation and automotive safety standards-making it the sole choice for mission-critical surge protection where failure is not an option.
Availability
MPLAD18KP7.0A is available at Aetrix Electronics and suitable for avionics power distribution, automotive engine control units, and industrial motor drive DC bus protection requiring stable component supply across extended product lifecycles.
Supply support for MPLAD18KP7.0A 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 Corporation (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened ICs for aerospace, defense, and industrial markets.
The MPLAD18KP7.0A belongs to Microsemi's high-power PLAD TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump suppression in safety-critical systems where thermal performance and certification rigor are mandatory.
FAQ
What is the clamping voltage of the MPLAD18KP7.0A at its rated peak impulse current?
The MPLAD18KP7.0A has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak impulse current of 1500 A under the standard 10/1000 μs waveform. This value is guaranteed across temperature and represents the upper limit of voltage seen by downstream circuitry during worst-case surge events, ensuring compatibility with 12 V and lower logic supplies.
Is the MPLAD18KP7.0A suitable for bidirectional signal line protection?
No - the MPLAD18KP7.0A is a unidirectional TVS diode, with polarity defined by cathode on the metal base. For bidirectional protection, the designated variant is MPLAD18KP7.0CA. Using the unidirectional MPLAD18KP7.0A on AC or differential signal lines risks forward conduction and potential damage during negative excursions.
Does the MPLAD18KP7.0A require special PCB layout considerations?
Yes - the MPLAD18KP7.0A requires a minimum 12.32 mm × 10.54 mm copper pad on the bottom side for the cathode metal base, per the RF01215 datasheet pad layout. This ensures adequate thermal conduction and mechanical anchoring. Trace inductance must be minimized: keep anode traces short and wide, and avoid vias between the device and ground plane to preserve sub-100 ps response.
What certifications does the MPLAD18KP7.0A hold for automotive applications?
The MPLAD18KP7.0A is qualified to AEC-Q101 for stress testing of discrete semiconductors and supports automotive use cases including 12 V load dump protection. It is explicitly listed for RTCA DO-160F Level 5 pin injection and IEC 61000-4-5 Class 1–5 secondary lightning protection - making it applicable to both automotive and aerospace-grade power systems.
Can the MPLAD18KP7.0A be used without a heatsink in high-temperature environments?
The MPLAD18KP7.0A relies on PCB copper area as its primary heatsink; no external heatsink is required if mounted per the recommended pad layout on ≥2 oz copper with thermal vias. However, steady-state power dissipation is limited to 2.5 W at 25 °C ambient and derates to zero above 150 °C junction temperature. For repeated surge duty, thermal design must ensure TJ remains ≤150 °C using the 0.7 °C/W RθJC metric.
MPLAD18KP7.0A 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 1500A (1.5kA)
- 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
MPLAD18KP7.0A FAQ
1.How can I place an order for MPLAD18KP7.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP7.0A 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 MPLAD18KP7.0A reliable?
The price and inventory of MPLAD18KP7.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP7.0A is usually 5 days.
3.What payment methods are accepted for MPLAD18KP7.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP7.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP7.0A?
MPLAD18KP7.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP7.0A 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 MPLAD18KP7.0A?
For technical support, including MPLAD18KP7.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP7.0A requirements.
6.How does Aetrix verify that MPLAD18KP7.0A is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP7.0A 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 MPLAD18KP7.0A meets industry standards.
7.What is the process for return or replacement of MPLAD18KP7.0A?
All MPLAD18KP7.0A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP7.0A, 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 MPLAD18KP7.0A part is unused and in its original packaging.
Return procedure for MPLAD18KP7.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP7.0A Tags
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