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Microchip Technology MPLAD18KP12CAE3
- Part No.:
- MPLAD18KP12CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP12CAE3.pdf
- Description:
- TVS DIODE 12VWM 19.9VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,954
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Product details
Overview
MPLAD18KP12CAE3 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 12 V reverse standoff voltage (VWM), clamps to ≤19.9 V at 905 A peak impulse current (IPP), and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MPLAD18KP12CAE3 datasheet, MPLAD18KP12CAE3 pinout, MPLAD18KP12CAE3 application, or MPLAD18KP12CAE3 equivalent, this device is selected for secondary lightning protection per IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances), pin-injection immunity per RTCA/DO-160F Waveform 4 Level 4, and ESD/EFT compliance per IEC 61000-4-2/4-4.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, triggered when transient voltage exceeds its breakdown range of 13.3–14.7 V (V(BR) @ I(BR)). Its low thermal resistance (RθJC = 0.7 °C/W) enables rapid heat dissipation during repetitive surges, supporting duty cycles ≤0.05% per Figure 1 and derated power above 100°C case temperature.
Designed for bidirectional operation, MPLAD18KP12CAE3 provides symmetrical clamping on both polarities with VC ≤19.9 V at IPP = 905 A (10/1000 μs), ID ≤10 μA at VWM = 12 V, and αV(BR) = 11 mV/°C - enabling stable performance across -55°C to +150°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V maximum continuous operating voltage - sets upper limit for circuit DC bias before clamping initiates |
| V(BR) min/max | 13.3–14.7 V breakdown range at test current - defines reliable turn-on threshold under surge conditions |
| VC @ IPP | ≤19.9 V clamping voltage at 905 A peak pulse - determines maximum voltage seen by protected ICs or loads |
| PPP | 18,000 W peak pulse power (10/1000 μs) - supports high-energy lightning transients without failure |
| ID @ VWM | ≤10 μA standby leakage - ensures minimal power loss and signal integrity in always-on systems |
| RθJC | 0.7 °C/W junction-to-case thermal resistance - enables effective heatsinking via metal baseplate mounting |
| Package | Surface-mount PLAD package with metal base cathode - provides low-inductance path and mechanical robustness |
Pinout & Package
The MPLAD18KP12CAE3 uses a 2-terminal surface-mount PLAD package with the cathode electrically connected to the exposed metal baseplate (bottom side). The top surface is marked with part number; polarity is unambiguous due to metal-base cathode configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Top Anode) | Anode connection | Connected to line/pin requiring protection; forms bidirectional clamping path with cathode base |
| Terminal 2 (Metal Base) | Cathode connection | Must be soldered to large copper pour or heatsink - serves as low-impedance return path and primary thermal conduction route |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables symmetric surge suppression on AC lines or differential buses without polarity constraints |
| RTCA DO-160F Waveform 4 Level 4 compliance | Withstands 6.4/69 μs pin-injection transients up to 12 V standoff - validated for avionics interface protection |
| IEC 61000-4-5 Class 1–5 support (42 Ω) | Meets secondary lightning immunity for aircraft, rail, and industrial control cabinets with 42 Ω source impedance |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life limitations - simplifies SMT assembly logistics |
| AEC-Q101 qualified | Validated for automotive under-hood applications including load dump and alternator ripple environments |
Applications
| Aerospace Avionics Interface Protection | Automotive Power Distribution |
|---|---|
Use Scenario: Protecting ARINC 429 data lines and sensor inputs against induced transients during lightning strikes or EMI events in flight. IC Role / Device Role / Timing Role: Bidirectional shunt TVS placed at connector entry point to clamp fast-rising common-mode surges before reaching FPGA or ASIC I/O buffers. Use Value: Ensures compliance with RTCA DO-160 Section 22 multi-stroke lightning standard while maintaining signal integrity below 19.9 V clamping threshold. | Use Scenario: Safeguarding body control modules (BCMs) and infotainment head units from 12 V battery line transients during load dump or jump-start events. IC Role / Device Role / Timing Role: Primary front-end surge suppressor mounted directly at power input connector, leveraging metal baseplate for thermal coupling to chassis ground. Use Value: Absorbs up to 18 kW pulses without degradation, meeting ISO 7637-2 Pulse 5a/b and AEC-Q101 stress requirements. |
| Industrial Motor Drive Control | Railway Signaling Equipment |
Use Scenario: Shielding PLC I/O terminals and encoder feedback lines from switching transients generated by VFDs and contactors. IC Role / Device Role / Timing Role: Bidirectional TVS installed across differential pairs (e.g., RS-485) and single-ended analog inputs to suppress RFI-coupled spikes. Use Value: Clamps transients within <5 ns response time while sustaining 905 A peak current - prevents latch-up or damage to isolated ADCs and digital isolators. | Use Scenario: Hardening track-side signaling interfaces (e.g., ETCS Level 1 balise readers) against induced surges from nearby traction currents and lightning coupling. IC Role / Device Role / Timing Role: Secondary protection stage downstream of gas discharge tubes (GDTs), providing precise low-clamp voltage after coarse front-end filtering. Use Value: Meets EN 50121-4 immunity requirements for railway electronics with 12 Ω and 2 Ω IEC 61000-4-5 test configurations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA | 600 W PPP rating, 5.0 mm × 3.5 mm SMB package, RθJC ≈ 25 °C/W | Limited to lower-energy transients; not rated for RTCA DO-160F Waveform 4 Level 4 or IEC 61000-4-5 Class 4/5 | Select when cost-sensitive consumer or non-safety-critical industrial designs require basic ESD/EFT protection only. |
| SMCJ12CA | 1500 W PPP rating, 7.1 mm × 6.2 mm SMC package, RθJC ≈ 10 °C/W | Supports moderate lightning surges but lacks multi-stroke validation and AEC-Q101 qualification | Choose for mid-tier automotive or telecom applications where 18 kW capability is unnecessary and board space allows larger footprint. |
Compared with SMBJ12CA and SMCJ12CA, MPLAD18KP12CAE3 delivers over 12× higher peak pulse power, certified multi-stroke lightning endurance, and traceable lot-level reliability screening - making it the only option for mission-critical aerospace and high-reliability automotive power rail protection.
Availability
MPLAD18KP12CAE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive power distribution, and industrial motor drive applications requiring stable component supply, long-term lifecycle assurance, and full traceability.
Supply support for MPLAD18KP12CAE3 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 components for aerospace, defense, and industrial markets.
The MPLAD series was developed specifically for high-power, surface-mount transient suppression in safety-critical platforms - emphasizing thermal robustness, multi-stroke endurance, and compliance with RTCA DO-160, IEC 61000-4-5, and AEC-Q101 standards.
FAQ
What is the clamping voltage of MPLAD18KP12CAE3 at its rated peak pulse current?
The MPLAD18KP12CAE3 has a maximum clamping voltage (VC) of 19.9 V at its rated peak impulse current (IPP) of 905 A under 10/1000 μs waveform conditions. This value is measured across the device terminals when subjected to standardized surge testing and defines the upper voltage limit imposed on protected circuitry during transient events. The MPLAD18KP12CAE3 maintains this clamping performance consistently due to its low dynamic impedance and thermally optimized PLAD package.
Is MPLAD18KP12CAE3 compliant with automotive qualification standards?
Yes, MPLAD18KP12CAE3 is tested and qualified to AEC-Q101 for discrete semiconductors, confirming its suitability for automotive applications including under-hood power distribution and engine control modules. It withstands load dump transients, conducted RF immunity, and thermal cycling per the standard. The MPLAD18KP12CAE3 also supports automotive design requirements through its RoHS-compliant e3 plating and moisture sensitivity Level 1 rating, eliminating dry-pack handling concerns during manufacturing.
How does the metal baseplate of MPLAD18KP12CAE3 affect PCB layout and thermal design?
The metal baseplate of MPLAD18KP12CAE3 serves as the cathode terminal and primary thermal conduction path, requiring direct soldering to a large copper pour or heatsink for optimal performance. Layout must follow the recommended pad dimensions (12.32–12.57 mm × 10.54–10.80 mm) and use thermal vias beneath the baseplate to transfer heat to inner or backside layers. Failure to implement adequate copper area will cause excessive junction temperature rise, reducing surge endurance and violating the 0.7 °C/W RθJC specification stated in the MPLAD18KP12CAE3 datasheet.
Does MPLAD18KP12CAE3 meet RTCA DO-160 lightning protection requirements?
Yes, MPLAD18KP12CAE3 is explicitly rated for RTCA DO-160 Section 22 multi-stroke lightning testing, including Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 compliance. Its 18,000 W peak pulse power rating and low clamping voltage ensure protection of sensitive avionics interfaces without compromising signal fidelity. The MPLAD18KP12CAE3 achieves this through wafer-level reliability screening and thermal design validated for repeated surge exposure - a key differentiator versus standard TVS diodes.
What is the significance of the "CA" suffix in MPLAD18KP12CAE3?
The "CA" suffix in MPLAD18KP12CAE3 denotes bidirectional construction, meaning the device provides symmetrical clamping for both positive and negative polarity transients. This is essential for protecting AC-coupled lines, differential buses (e.g., RS-485), or circuits where voltage polarity reversal may occur. Unlike unidirectional variants (e.g., MPLAD18KP12A), the CA version eliminates the need for polarity-aware placement and enables simplified layout - a critical advantage confirmed in the MPLAD18KP12CAE3 product nomenclature and electrical characteristics table.
MPLAD18KP12CAE3 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 905A
- 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
MPLAD18KP12CAE3 FAQ
1.How can I place an order for MPLAD18KP12CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP12CAE3 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 MPLAD18KP12CAE3 reliable?
The price and inventory of MPLAD18KP12CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP12CAE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP12CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP12CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP12CAE3?
MPLAD18KP12CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP12CAE3 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 MPLAD18KP12CAE3?
For technical support, including MPLAD18KP12CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP12CAE3 requirements.
6.How does Aetrix verify that MPLAD18KP12CAE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP12CAE3 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 MPLAD18KP12CAE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP12CAE3?
All MPLAD18KP12CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP12CAE3, 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 MPLAD18KP12CAE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP12CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP12CAE3 Tags
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