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Microchip Technology MPLAD18KP54CA
- Part No.:
- MPLAD18KP54CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP54CA.pdf
- Description:
- TVS DIODE 54VWM 87.1VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,003
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Product details
Overview
MPLAD18KP54CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps transients to ≤87.1 V at 100 A, and features a 54 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (60.0–66.3 V). It meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection requirements.
For engineers reviewing the MPLAD18KP54CA datasheet, MPLAD18KP54CA pinout, MPLAD18KP54CA application, or MPLAD18KP54CA equivalent, this device is selected for high-reliability DC bus and signal line protection where multi-stroke lightning immunity, low thermal resistance (RθJC = 0.7 °C/W), and RoHS-compliant SMT mounting are critical design constraints.
Technical Context
The MPLAD18KP54CA employs an avalanche diode structure optimized for fast response (<5 ns clamping time) and high cumulative energy handling. Its bidirectional configuration enables symmetrical clamping on AC or differential lines without polarity sensitivity, supporting both positive and negative transients up to 100 A peak impulse current (IPP).
Thermally, it uses a metal-base package with void-free epoxy encapsulation (UL94V-0) and direct junction-to-case conduction path, enabling 71 W steady-state dissipation at TC = 100°C. It is fully surge-tested per AEC-Q101 and supports MIL-PRF-19500 upscreening for high-reliability programs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous DC or RMS operating voltage before clamping initiates |
| V(BR) min/max | 60.0–66.3 V @ I(BR) - Confirmed avalanche onset range ensures reliable turn-on margin above VWM |
| VC @ IPP | 87.1 V @ 100 A - Clamping voltage under full-rated 10/1000 μs surge defines maximum protected circuit stress |
| PPP | 18,000 W @ 10/1000 μs - Peak power rating determines survivability against lightning-induced surges |
| RθJC | 0.7 °C/W - Low junction-to-case thermal resistance enables effective heatsinking on PCB copper pads |
| ID @ VWM | 10 μA max - Ultra-low leakage preserves signal integrity and battery life in standby circuits |
| Clamping Time | <5 ns - Sub-nanosecond response ensures protection of fast-edge digital and RF interfaces |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anode/Cathode) with metal baseplate (cathode on bottom). Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈1 g. UL94V-0 epoxy body; matte-tin terminals solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Side) | Positive transient return path | Connects to protected line; forms one side of bidirectional clamping loop |
| Cathode (Metal Base) | Common reference / heat sink interface | Must be soldered to large copper pour for thermal management and low-inductance grounding |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential buses (e.g., RS-485, CAN FD) without external polarity routing |
| RTCA DO-160F Waveform 4 Level 4 compliance | Validated for aircraft pin-injection transients (6.4/69 μs), eliminating need for additional front-end filtering in avionics I/O |
| IEC 61000-4-5 Class 1–5 support (42 Ω source) | Meets full secondary lightning immunity across all severity levels using standard test setup-no derating required |
| 0.7 °C/W RθJC | Allows >70 W steady-state power dissipation at 100°C case temperature, enabling use in high-ambient industrial motor drives |
| AEC-Q101 qualified | Guarantees robustness for automotive under-hood applications including load dump and ISO 7637-2 pulse testing |
Applications
| Aerospace Avionics I/O Protection | Automotive Power Distribution |
|---|---|
Use Scenario: Protecting ARINC 429 data lines and sensor inputs in flight control computers exposed to lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Bidirectional TVS clamp absorbing multi-stroke surges while preserving signal fidelity below 54 V operating range. Use Value: Eliminates need for discrete RC filters or gas discharge tubes, reducing board area by 40% and meeting Level 4 pin injection without layout redesign. | Use Scenario: Safeguarding 12 V/24 V battery-fed ECUs (e.g., ABS, ADAS domain controllers) against load dump spikes up to 60 V. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly at connector entry point, limiting bus voltage to ≤87.1 V during 100 A surges. Use Value: Withstands repeated 18 kW surges without degradation, extending ECU field life beyond 15 years in commercial vehicle fleets. |
| Industrial Motor Drive DC Bus | Telecom Power Feeds |
Use Scenario: Shielding gate drivers and current sensors on 400 V DC bus sections of variable-frequency drives subject to IGBT switching transients and induced RFI. IC Role / Device Role / Timing Role: Fast-clamping (≤5 ns) bidirectional suppressor shunting high-dI/dt noise away from sensitive analog front-ends. Use Value: Prevents false triggering of overcurrent protection due to sub-100 ns voltage spikes, improving system uptime by >99.99% in continuous operation. | Use Scenario: Hardening -48 V telecom power feeds (e.g., PoE midspans, remote radio units) against lightning surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Secondary protection stage downstream of primary GDTs, clamping residual energy to safe levels before reaching DC-DC converters. Use Value: Achieves IEC 61000-4-5 Class 5 compliance with 42 Ω source impedance-enabling single-stage architecture and reducing BOM cost by $1.20/unit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54CA | 600 W PPP rating (vs. 18,000 W); 10× lower surge capacity; SMB package (RθJC ≈ 25 °C/W) | Suitable only for low-energy ESD/EFT; cannot meet DO-160F Level 4 or IEC 61000-4-5 Class 3+ | Select when cost and board space constrain design, and surge threat level is limited to IEC 61000-4-2/4-4 only. |
| SMCJ54CA | 1500 W PPP; SMC package; RθJC ≈ 3.5 °C/W; same VWM/V(BR) but 12× lower peak power | Valid for automotive load dump (ISO 7637-2 Pulse 5a) but fails DO-160F Waveform 4 and multi-stroke lightning tests | Choose for non-aerospace industrial controls where 1.5 kW surge margin suffices and thermal budget allows larger heatsink. |
Compared with SMBJ54CA and SMCJ54CA, the MPLAD18KP54CA provides 30× and 12× higher peak pulse power respectively, enabling single-device compliance with RTCA DO-160F Level 4 and IEC 61000-4-5 Class 5-critical for aerospace and heavy-duty automotive deployments where cascaded protection adds cost and failure points.
Availability
MPLAD18KP54CA 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 support, and traceable high-reliability sourcing.
Supply support for MPLAD18KP54CA 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, mixed-signal, and power management solutions for aerospace, defense, and industrial markets.
The MPLAD18KP54CA belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection and harsh-environment surge immunity in safety-critical systems.
FAQ
What is the clamping voltage of MPLAD18KP54CA at its rated peak pulse current?
The MPLAD18KP54CA has a maximum clamping voltage (VC) of 87.1 V at 100 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value defines the upper voltage limit imposed on protected circuitry during worst-case surge events and is measured per JEDEC standards. The MPLAD18KP54CA maintains this clamping performance across its full operating temperature range (-55°C to +150°C) with minimal derating.
Is MPLAD18KP54CA compliant with aerospace environmental testing standards?
Yes, the MPLAD18KP54CA is validated for RTCA DO-160F Section 22 lightning-induced transient testing, including Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4. It also meets AEC-Q101 stress testing for automotive reliability and supports MIL-PRF-19500 upscreening options. These qualifications confirm its suitability for flight-critical avionics I/O protection where multi-stroke surge resilience is mandatory.
How does the thermal performance of MPLAD18KP54CA compare to standard SMC/SMB TVS diodes?
The MPLAD18KP54CA achieves a junction-to-case thermal resistance (RθJC) of just 0.7 °C/W-over 35× lower than typical SMCJ devices (~25 °C/W) and 3× better than high-performance SMC packages (~2.2 °C/W). This enables 71 W steady-state dissipation at 100°C case temperature, allowing direct mounting to PCB copper planes without external heatsinks. In contrast, standard SMC/SMB parts require significant thermal vias or metal-core boards to avoid thermal runaway under sustained stress.
Can MPLAD18KP54CA replace unidirectional TVS diodes in existing designs?
No-MPLAD18KP54CA is strictly bidirectional (denoted by "CA" suffix) and must not substitute for unidirectional parts (e.g., MPLAD18KP54A) without circuit review. Its symmetrical clamping behavior protects both polarities equally, making it ideal for AC lines or differential buses. Replacing a unidirectional device risks forward-conduction damage during normal operation if DC bias exceeds 2.0 V forward clamping threshold. Always verify polarity requirements and signal swing range before substitution.
What packaging options are available for MPLAD18KP54CA?
The MPLAD18KP54CA is supplied in bulk or tape-and-reel format per EIA-481-B standard (add "TR" suffix to part number for reel). Standard marking includes full part number on the epoxy body; terminals feature RoHS-compliant matte-tin plating. Moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1-no dry pack or baking required prior to reflow. Custom packaging, including upscreened lots per MIL-PRF-19500, is available upon request.
MPLAD18KP54CA 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):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 207A
- 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
MPLAD18KP54CA FAQ
1.How can I place an order for MPLAD18KP54CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP54CA 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 MPLAD18KP54CA reliable?
The price and inventory of MPLAD18KP54CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP54CA is usually 5 days.
3.What payment methods are accepted for MPLAD18KP54CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP54CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP54CA?
MPLAD18KP54CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP54CA 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 MPLAD18KP54CA?
For technical support, including MPLAD18KP54CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP54CA requirements.
6.How does Aetrix verify that MPLAD18KP54CA is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP54CA 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 MPLAD18KP54CA meets industry standards.
7.What is the process for return or replacement of MPLAD18KP54CA?
All MPLAD18KP54CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP54CA, 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 MPLAD18KP54CA part is unused and in its original packaging.
Return procedure for MPLAD18KP54CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP54CA Tags
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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