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Microchip Technology MPLAD18KP64CA
- Part No.:
- MPLAD18KP64CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP64CA.pdf
- Description:
- TVS DIODE 64VWM 103VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,826
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Product details
Overview
MPLAD18KP64CA from Microsemi is a bidirectional 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, features a 64 V reverse standoff voltage (VWM), clamps to ≤103 V at 175 A peak impulse current (IPP), and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 2–4 lightning standards.
For engineers reviewing the MPLAD18KP64CA datasheet, MPLAD18KP64CA pinout, MPLAD18KP64CA application, or MPLAD18KP64CA equivalent, this device is selected for secondary lightning protection, load dump suppression, and ESD/EFT hardening where low thermal resistance, RoHS-compliant packaging, and traceable high-reliability screening are required.
Technical Context
The MPLAD18KP64CA operates as a bidirectional avalanche diode-based TVS, leveraging silicon junction breakdown to clamp transients above its 64 V working voltage. Its design minimizes junction-to-case thermal resistance (RθJC = 0.7 °C/W) and supports multi-stroke surge endurance per RTCA DO-160 Section 22.
It complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (lightning) under multiple source impedances (2 Ω, 12 Ω, 42 Ω), and is rated for operation from –55 °C to +150 °C with moisture sensitivity level 1 (no dry pack required).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - enables single-device protection against severe lightning-induced surges in avionics and vehicle ECUs |
| Reverse Standoff Voltage (VWM) | 64 V - maximum continuous DC or RMS operating voltage before clamping initiates |
| Clamping Voltage (VC) | ≤103 V @ IPP = 175 A - limits downstream voltage stress during worst-case surge events |
| Breakdown Voltage (V(BR)) | 71.1–78.6 V @ I(BR) - defines the minimum voltage at which avalanche conduction begins |
| Thermal Resistance (RθJC) | 0.7 °C/W - allows efficient heat transfer to PCB copper or heatsink, critical for repeated surge duty cycles |
| Standby Current (ID) | ≤10 μA @ VWM - ensures negligible leakage in standby, preserving system power integrity |
| Operating Temperature | –55 °C to +150 °C - supports deployment in engine bays, flight control units, and outdoor infrastructure |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anodeless Diode) - void-free UL94V-0 epoxy body with metal base cathode termination; dimensions 12.32 × 10.54 × 5.33 mm (L × W × H); weight ≈1 g; polarity marked on body; cathode is the metal base (bottom side).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface pad) | Transient current entry point (bidirectional) | Accepts surge current in either polarity; connects to protected line (e.g., CAN_H, RS-485 A) |
| Cathode (metal base) | Transient current return path | Must be soldered to large copper pour or heatsink for thermal management and low-inductance grounding |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Protects AC-coupled or differential signal lines (e.g., RS-485, CAN, Ethernet PHY) without polarity constraints |
| RTCA DO-160F Waveform 4 Level 4 compliance | Withstands 6.4/69 μs pin-injection transients up to 100 Vpk at 25 °C - certified for aircraft data bus protection |
| MIL-PRF-19500 upscreening option | Enables M, MA, MX, or MXL reliability levels with lot traceability and 3σ ID screening - suitable for space-grade and defense programs |
| Low-profile SMT package with metal base | Reduces thermal impedance by >85% vs. standard SMB/SMA packages - sustains >1000 surge cycles at 0.05% duty factor |
| IEC 61000-4-5 Class 2–4 support (42 Ω, 12 Ω, 2 Ω) | Validated for secondary lightning protection across diverse source impedances - simplifies system-level EMC validation |
Applications
| Aerospace Data Bus Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: Protecting ARINC 429, MIL-STD-1553, or AFDX physical layer interfaces from induced lightning transients in aircraft fuselage wiring. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector entry point to clamp common-mode surges before reaching transceiver ICs. Use Value: Meets RTCA DO-160F Section 22 multi-stroke lightning requirements with <100 ps response time and no degradation after 1000+ strikes. | Use Scenario: Safeguarding 12 V/24 V automotive electronic control units (ECUs) during alternator load dump events (ISO 7637-2 Pulse 5a/b). IC Role / Device Role / Timing Role: Primary clamping device across battery rail, absorbing up to 18 kW energy within microseconds. Use Value: Clamps to ≤103 V while handling 175 A peak current - prevents overvoltage damage to MCU, CAN transceivers, and sensors. |
| Industrial Ethernet Port Hardening | Renewable Energy DC Link Protection |
Use Scenario: Securing PoE-powered Ethernet switches and industrial cameras against ESD, EFT, and induced surges on RJ45 ports. IC Role / Device Role / Timing Role: Bidirectional TVS on each differential pair (e.g., TX+/TX–, RX+/RX–) to maintain signal integrity during transients. Use Value: Low capacitance (<100 pF typical) and symmetric clamping preserve 100 Mbps/1 Gbps signal fidelity while meeting IEC 61000-4-2/4-4/4-5. | Use Scenario: Protecting solar inverter DC input stages and wind turbine converter modules from grid-switching transients and lightning-induced spikes. IC Role / Device Role / Timing Role: High-energy TVS placed across DC bus rails to limit voltage overshoot during fault clearing or lightning coupling. Use Value: 18,000 W PPP rating and –55 °C to +150 °C operation ensure reliability in uncooled outdoor enclosures exposed to wide ambient swings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA | 600 W PPP rating (vs. 18,000 W); SMA package; RθJC ≈ 35 °C/W | Limited to low-energy ESD/EFT; unsuitable for lightning or load dump | Select only for cost-sensitive consumer electronics with sub-1 kA surge exposure |
| SMCJ64CA | 1500 W PPP rating; SMC package; RθJC ≈ 12 °C/W; no DO-160 qualification | Supports moderate automotive transients but lacks multi-stroke lightning validation | Use where AEC-Q101 compliance is sufficient and RTCA DO-160 is not required |
Compared with SMBJ64CA and SMCJ64CA, the MPLAD18KP64CA provides >12× higher peak power handling, 17× lower thermal resistance, and formal certification for aircraft lightning standards - making it the only viable choice for safety-critical aerospace and heavy-duty automotive systems requiring sustained surge resilience.
Availability
MPLAD18KP64CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU design, and industrial power conversion systems requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MPLAD18KP64CA 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 MPLAD18KP64CA belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection and load dump suppression in mission-critical platforms where thermal robustness and regulatory compliance are non-negotiable.
FAQ
What is the clamping voltage of the MPLAD18KP64CA at its rated peak pulse current?
The MPLAD18KP64CA has a maximum clamping voltage (VC) of 103 V when subjected to its rated peak impulse current (IPP) of 175 A under 10/1000 μs waveform conditions. This value is measured at the device terminals with proper PCB layout - including minimum 100 mm² copper pour under the cathode - and defines the upper voltage limit imposed on protected circuitry during surge events.
Does the MPLAD18KP64CA meet AEC-Q101 qualification requirements?
Yes, the MPLAD18KP64CA is tested in accordance with AEC-Q101 requirements for discrete semiconductors. The device undergoes stress testing including HTGB, HTRB, TST, and surge validation per JESD22 standards, confirming suitability for automotive under-hood and chassis applications where reliability under thermal and electrical stress is mandatory.
How does the PLAD package of the MPLAD18KP64CA improve thermal performance compared to standard SMC or SMB packages?
The PLAD package of the MPLAD18KP64CA features a metal base acting as both cathode terminal and primary thermal path, achieving a junction-to-case thermal resistance (RθJC) of just 0.7 °C/W - over 17× better than typical SMC packages (~12 °C/W) and >50× better than SMB packages (~35 °C/W). This enables sustained multi-pulse operation without thermal runaway.
Can the MPLAD18KP64CA be used for unidirectional applications?
No - the "CA" suffix explicitly denotes bidirectional construction. For unidirectional use, the equivalent part is MPLAD18KP64A. Using the MPLAD18KP64CA in a unidirectional configuration does not impair functionality but offers symmetrical clamping, which is essential for protecting AC-coupled or differential buses like RS-485 or CAN where polarity reversal may occur.
What is the moisture sensitivity level (MSL) and reflow profile for the MPLAD18KP64CA?
The MPLAD18KP64CA is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and requires no dry pack or baking prior to assembly. Its recommended reflow profile follows standard lead-free (RoHS-compliant) guidelines with peak temperature of 260 °C for 10 seconds, compatible with standard SMT processes.
MPLAD18KP64CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 175A
- 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
MPLAD18KP64CA FAQ
1.How can I place an order for MPLAD18KP64CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP64CA 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 MPLAD18KP64CA reliable?
The price and inventory of MPLAD18KP64CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP64CA is usually 5 days.
3.What payment methods are accepted for MPLAD18KP64CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP64CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP64CA?
MPLAD18KP64CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP64CA 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 MPLAD18KP64CA?
For technical support, including MPLAD18KP64CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP64CA requirements.
6.How does Aetrix verify that MPLAD18KP64CA is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP64CA 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 MPLAD18KP64CA meets industry standards.
7.What is the process for return or replacement of MPLAD18KP64CA?
All MPLAD18KP64CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP64CA, 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 MPLAD18KP64CA part is unused and in its original packaging.
Return procedure for MPLAD18KP64CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP64CA Tags
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