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Microchip Technology MPLAD18KP120CA
- Part No.:
- MPLAD18KP120CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP120CA.pdf
- Description:
- TVS DIODE 120VWM 193VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:3,539
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Product details
Overview
MPLAD18KP120CA 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 at ≤193 V under 100 A impulse, and features 120 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (133–147 V). It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection for Waveform 4.
For engineers reviewing the MPLAD18KP120CA datasheet, MPLAD18KP120CA pinout, MPLAD18KP120CA application, or MPLAD18KP120CA equivalent, key selection criteria include its bidirectional polarity, 120 V working voltage, 193 V max clamping at 100 A, thermal resistance of 0.7 °C/W junction-to-case, and compliance with IEC 61000-4-5 (Class 1–5, 42 Ω source) and DO-160F lightning standards.
Technical Context
This TVS diode uses an avalanche breakdown mechanism to divert high-energy transients away from sensitive circuitry. Its low RθJC (0.7 °C/W) enables effective heat transfer to a heatsink or PCB copper plane, supporting repeated surge events at ≤0.05% duty cycle. The device operates across –55 °C to +150 °C and maintains stable clamping performance under IEC 61000-4-2 ESD (±15 kV air/±8 kV contact) and IEC 61000-4-4 EFT (4 kV).
Its bidirectional construction allows symmetrical clamping for AC-coupled or floating signal lines, while the metal-base cathode configuration (per package marking) defines terminal polarity. Standby leakage is limited to 10 μA at 120 V, ensuring minimal impact on high-impedance circuits during normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 18,000 W @ 10/1000 μs - sustains multi-stroke lightning surges per DO-160 Section 22 |
| Reverse Standoff Voltage (VWM) | 120 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 133–147 V @ I(BR) - ensures reliable turn-on margin above operating voltage |
| Max Clamping Voltage (VC) | 193 V @ 100 A - limits downstream voltage stress during worst-case surge |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables direct mounting to heatsink for thermal management of repetitive pulses |
| Standby Leakage Current | 10 μA @ 120 V - negligible loading on 120 V bias rails or sensor interfaces |
| IEC 61000-4-5 Class Support | Class 1–5 (42 Ω), Class 1–4 (12 Ω), Class 2–3 (2 Ω) - validated secondary lightning protection |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anode/Cathode) with metal base cathode terminal. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈1 g. UL94V-0 epoxy body; matte-tin RoHS-compliant plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top side) | Transient current entry point (bidirectional) | Connects to protected line; conducts during both positive and negative overvoltage excursions |
| Cathode (metal base) | Transient current return path | Must be soldered to large copper area or heatsink for thermal conduction and low-inductance grounding |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled buses (e.g., RS-485, CAN FD, Ethernet PHY) without polarity constraints |
| 18 kW surge rating | Meets RTCA DO-160F Section 22 multi-stroke lightning requirements for aircraft avionics |
| 0.7 °C/W RθJC | Enables >1000 surge cycles at 0.05% duty factor when mounted per recommended pad layout |
| AEC-Q101 qualification | Validated reliability for automotive load-dump and battery-transient protection in engine control units |
| Level 4 DO-160F pin injection | Withstands 6.4/69 μs waveform up to 120 V standoff - suitable for flight-critical data bus protection |
Applications
| Aerospace Data Bus Protection | Automotive Power Distribution |
|---|---|
Use Scenario: Protecting ARINC 429 or MIL-STD-1553B data lines from lightning-induced transients in airborne computing modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair or single-ended signal line to clamp induced surges before receiver input. Use Value: Limits clamped voltage to ≤193 V, preserving signal integrity and preventing latch-up in 3.3 V or 5 V interface ICs. | Use Scenario: Safeguarding 12 V/24 V power inputs in vehicle ECUs against ISO 7637-2 load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary surge suppression device connected between battery rail and ground, upstream of DC/DC converters. Use Value: Absorbs 18 kW pulses without degradation, enabling compliance with AEC-Q101 and OEM-specific surge test plans. |
| Industrial Motor Drive Control | Railway Signaling Interface |
Use Scenario: Shielding PLC I/O modules from inductive kickback and EFT noise generated by solenoid valves and contactors. IC Role / Device Role / Timing Role: TVS installed at field-side connector to shunt fast-rising transients (<100 ps response) before entering isolation barrier. Use Value: 10 μA leakage at 120 V prevents false triggering in high-impedance analog input circuits. | Use Scenario: Securing track-side signaling equipment (e.g., axle counters, interlocking relays) against lightning coupling on long outdoor cables. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), clamping residual energy to safe levels for downstream optocouplers. Use Value: Validated for IEC 61000-4-5 Class 4 (42 Ω source), ensuring survivability in EN 50121-4 compliant railway environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA | 600 W rating, 120 V VWM, same SMC package footprint but lower PPP and higher RθJA | Not suitable for DO-160F Level 4 or IEC 61000-4-5 Class 4; limited to consumer-grade surge immunity | Select only for cost-sensitive, non-safety-critical applications with <1 kW surge exposure. |
| SMCJ120CA | 1500 W rating, 120 V VWM, SMC package, RθJC = 1.5 °C/W vs. 0.7 °C/W | Lacks AEC-Q101 qualification and DO-160F validation; insufficient for aerospace multi-stroke testing | Acceptable for industrial controls where full DO-160F compliance is not required and thermal budget permits higher junction rise. |
Compared with SMBJ120CA and SMCJ120CA, the MPLAD18KP120CA provides 30× higher peak pulse power, half the thermal resistance, and certified compliance with aviation and automotive surge standards-making it the sole option for mission-critical, high-reliability transient suppression where sustained energy absorption and thermal stability are mandatory.
Availability
MPLAD18KP120CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU power protection, and industrial motor drive I/O hardening requiring stable component supply across extended product lifecycles.
Supply support for MPLAD18KP120CA 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 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 systems where standard TVS devices fail under multi-pulse lightning stress-targeting DO-160, ISO 7637, and IEC 61000-4-5 compliance without derating.
FAQ
What is the maximum clamping voltage of the MPLAD18KP120CA at its rated peak pulse current?
The MPLAD18KP120CA has a maximum clamping voltage (VC) of 193 V when subjected to a 100 A peak impulse current under the standard 10/1000 μs waveform. This value is measured per Figure 3 in RF01215 Rev B and ensures downstream circuitry remains within safe voltage limits during surge events. The MPLAD18KP120CA achieves this clamping performance while sustaining 18,000 W peak power, distinguishing it from lower-rated TVS devices.
Is the MPLAD18KP120CA qualified for automotive applications?
Yes, the MPLAD18KP120CA is explicitly qualified to AEC-Q101 for automotive use. It is designed to withstand harsh electrical environments including ISO 7637-2 load dump transients and battery reversal conditions. Its 120 V standoff voltage and 193 V clamping make it suitable for 24 V commercial vehicle ECUs and heavy-duty power distribution modules. The MPLAD18KP120CA also supports optional MIL-PRF-19500 upscreening for enhanced reliability.
How does the PLAD package of the MPLAD18KP120CA improve thermal performance compared to standard SMC packages?
The PLAD package of the MPLAD18KP120CA features a metal base cathode that serves as a direct thermal conduction path, achieving a junction-to-case thermal resistance (RθJC) of just 0.7 °C/W-less than half that of typical SMC-packaged TVS diodes (~1.5 °C/W). This allows the MPLAD18KP120CA to dissipate heat more efficiently during repetitive surges. When mounted per the recommended pad layout on FR4, the MPLAD18KP120CA sustains 18 kW pulses with minimal junction temperature rise.
Does the MPLAD18KP120CA meet RTCA DO-160F lightning protection requirements?
Yes, the MPLAD18KP120CA is validated for RTCA DO-160F Section 22 multi-stroke lightning testing and pin injection (Waveform 4, Level 4). It meets the 6.4/69 μs waveform requirement at 120 V standoff and is rated for Level 4 protection up to 130 V variants. The MPLAD18KP120CA's 18 kW rating and low clamping voltage ensure compliance with aircraft-level surge immunity without external derating or parallel device stacking.
What is the polarity configuration of the MPLAD18KP120CA and how is it identified on the device?
The MPLAD18KP120CA is a bidirectional TVS, indicated by the "CA" suffix in its part number. Polarity is defined by physical construction: the cathode is the metal base (underside) of the package, while the anode is the top-side metallized terminal. This configuration is documented in the "PLAD" nomenclature diagram and confirmed in the mechanical drawings of RF01215 Rev B. The MPLAD18KP120CA requires no orientation-dependent PCB layout-its symmetry enables flexible placement across AC or floating nodes.
MPLAD18KP120CA 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):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 94A
- 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
MPLAD18KP120CA FAQ
1.How can I place an order for MPLAD18KP120CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP120CA 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 MPLAD18KP120CA reliable?
The price and inventory of MPLAD18KP120CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP120CA is usually 5 days.
3.What payment methods are accepted for MPLAD18KP120CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP120CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP120CA?
MPLAD18KP120CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP120CA 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 MPLAD18KP120CA?
For technical support, including MPLAD18KP120CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP120CA requirements.
6.How does Aetrix verify that MPLAD18KP120CA is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP120CA 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 MPLAD18KP120CA meets industry standards.
7.What is the process for return or replacement of MPLAD18KP120CA?
All MPLAD18KP120CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP120CA, 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 MPLAD18KP120CA part is unused and in its original packaging.
Return procedure for MPLAD18KP120CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP120CA 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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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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