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Microchip Technology MPLAD18KP11CA
- Part No.:
- MPLAD18KP11CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP11CA.pdf
- Description:
- TVS DIODE 11VWM 18.2VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,428
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Product details
Overview
MPLAD18KP11CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps at ≤18.2 V under 989 A peak impulse current, and features a 11 V reverse standoff voltage (VWM) with ±10% breakdown tolerance (12.2–13.5 V). It meets RTCA DO-160F Level 4 pin injection (Waveform 4) and IEC 61000-4-5 Class 1–5 secondary lightning protection.
For engineers reviewing the MPLAD18KP11CA datasheet, MPLAD18KP11CA pinout, MPLAD18KP11CA application, or MPLAD18KP11CA equivalent, key selection criteria include its bidirectional polarity, 18 kW surge rating, low 0.7 °C/W junction-to-case thermal resistance, RoHS-compliant e3 plating, and qualification to AEC-Q101 and MIL-PRF-19500 screening levels.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, activating when transient voltage exceeds its breakdown threshold (V(BR)). Its bidirectional construction enables symmetrical suppression of positive and negative transients without external polarity management.
It is characterized by fast response (<5 ns clamping time), low thermal resistance (RθJC = 0.7 °C/W), and stable performance across -55°C to +150°C junction temperature range. The device is validated for multi-stroke lightning per RTCA DO-160 Section 22 and supports secondary lightning protection per IEC 61000-4-5 with 2 Ω, 12 Ω, and 42 Ω source impedances.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 11 V - maximum continuous operating voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 12.2–13.5 V @ I(BR) - ensures reliable turn-on margin above VWM |
| Max Clamping Voltage (VC) | 18.2 V @ 989 A - limits downstream voltage stress during worst-case surge |
| Standby Current (ID) | 10 μA @ 11 V - negligible leakage during normal operation |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to PCB copper or heatsink |
| Clamping Response Time | <5 ns - suppresses fast-rising ESD/EFT transients before IC damage occurs |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anodeless Device) with metal base cathode termination. Void-free UL94V-0 epoxy body; tin-lead or RoHS-compliant matte-tin plating; weight ≈1 g; polarity marked - cathode is metal base (bottom side).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Side) | Transient current entry point (bidirectional) | Accepts positive or negative surge current; symmetric conduction path |
| Cathode (Metal Base) | Transient current return path | Primary thermal interface - must be soldered to large copper pour or heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Eliminates need for polarity-aware layout; protects AC-coupled or floating signal lines |
| 18 kW surge rating | Meets RTCA DO-160 Section 22 multi-stroke lightning requirements for avionics |
| 0.7 °C/W RθJC | Enables >70 W steady-state dissipation at TC = 100°C with minimal board area |
| AEC-Q101 qualified | Validated for automotive load dump and ISO 7637-2 pulse 5a/b immunity |
| RoHS-compliant (e3) | Matte-tin plating ensures lead-free assembly compatibility and long-term solderability |
Applications
| Avionics Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC bus inputs in flight control computers against lightning-induced transients per DO-160F Section 22. IC Role / Device Role / Timing Role: Primary parallel clamping element placed directly at connector entry point. Use Value: Limits transient voltage to ≤18.2 V, preventing latch-up or gate oxide rupture in downstream DC-DC controllers and FPGAs. | Use Scenario: Safeguarding 12 V power rails in diesel ECU modules exposed to ISO 7637-2 pulse 5a (load dump). IC Role / Device Role / Timing Role: High-energy crowbar device shunting surge current away from microcontroller power pins. Use Value: Absorbs 18,000 W surges without degradation, enabling single-device compliance with automotive Grade A immunity requirements. |
| Railway Signaling Interface | Industrial Motor Drive Control Board |
Use Scenario: Shielding RS-485 communication ports on trackside signaling units from induced surges during nearby lightning strikes. IC Role / Device Role / Timing Role: Bidirectional line protector on differential data pair, referenced to chassis ground. Use Value: Symmetric clamping preserves signal integrity while limiting common-mode voltage excursion to <18.2 V peak. | Use Scenario: Protecting isolated gate driver supply inputs in variable-frequency drives subjected to IGBT switching noise and line transients. IC Role / Device Role / Timing Role: Secondary surge limiter after primary MOV, handling fast residual spikes. Use Value: Sub-5 ns response prevents false triggering of overvoltage protection circuits in gate drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11CA | 600 W PPP rating; SMB package; RθJC ≈ 15 °C/W | Not suitable for DO-160F Level 4 or IEC 61000-4-5 Class 4+; limited to consumer/industrial grade | Select only for cost-sensitive, low-energy applications where 18 kW capability is unnecessary |
| SMCJ11CA | 1500 W PPP rating; SMC package; RθJC ≈ 3.5 °C/W; no AEC-Q101 or DO-160 qualification | Lacks multi-stroke lightning validation; insufficient for avionics or automotive safety-critical rails | Use where moderate surge immunity suffices and qualification traceability is not required |
Compared with SMBJ11CA and SMCJ11CA, the MPLAD18KP11CA provides 30× and 12× higher peak pulse power respectively, validated thermal performance for sustained surge duty, and formal qualification to aerospace and automotive standards - making it the sole option for certified high-reliability platforms.
Availability
MPLAD18KP11CA is available at Aetrix Electronics and suitable for avionics power distribution, automotive engine control units, railway signaling interfaces, and industrial motor drive control boards requiring stable component supply across extended product lifecycles.
Supply support for MPLAD18KP11CA 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) designs high-reliability analog, mixed-signal, and power semiconductors for aerospace, defense, and industrial markets.
The MPLAD18KP11CA belongs to Microsemi's high-power PLAD TVS family, engineered specifically for certified lightning and load-dump protection in safety-critical transportation electronics.
FAQ
What is the clamping voltage of MPLAD18KP11CA at its rated peak pulse current?
The MPLAD18KP11CA has a maximum clamping voltage (VC) of 18.2 V when subjected to its peak impulse current of 989 A under 10/1000 μs waveform conditions. This value is measured at the device terminals and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The MPLAD18KP11CA maintains this clamping performance across its full operating temperature range (-55°C to +150°C) and is verified per JEDEC test methods.
Is MPLAD18KP11CA qualified for automotive applications?
Yes, the MPLAD18KP11CA is qualified to AEC-Q101 for discrete semiconductors, validating its robustness against mechanical stress, temperature cycling, and high-current surge events typical in automotive environments. It meets ISO 7637-2 pulse 5a (load dump) requirements and supports design-in for engine control units, battery management systems, and ADAS power supplies. The MPLAD18KP11CA also offers optional MIL-PRF-19500 upscreening for enhanced reliability.
How does the PLAD package of MPLAD18KP11CA improve thermal performance?
The PLAD package of MPLAD18KP11CA uses a metal base as the cathode terminal, providing direct thermal conduction from the silicon die to the PCB copper pour or external heatsink. With a junction-to-case thermal resistance (RθJC) of just 0.7 °C/W, it achieves significantly lower temperature rise than standard SMC or SMB packages. This allows the MPLAD18KP11CA to sustain repeated 18 kW surges without thermal runaway, especially when mounted per the recommended pad layout with ≥250 mm² of 2-oz copper.
Does MPLAD18KP11CA meet RTCA DO-160 lightning protection requirements?
Yes, the MPLAD18KP11CA is explicitly validated for RTCA DO-160F Section 22 multi-stroke lightning testing, including Waveform 4 (6.4/69 μs) at Level 4 and Waveform 5A (40/120 μs) at Level 4. Its 18,000 W rating, sub-5 ns response, and bidirectional symmetry enable compliance in both pin-injection and bulk current injection test configurations. The MPLAD18KP11CA is listed in the official Microsemi DO-160 compliance matrix for all applicable voltage grades including 11 V.
What is the meaning of the "CA" suffix in MPLAD18KP11CA?
The "CA" suffix in MPLAD18KP11CA denotes bidirectional construction: "C" indicates bidirectional capability and "A" confirms RoHS-compliant (e3) matte-tin plating. This distinguishes it from unidirectional variants like MPLAD18KP11A. The bidirectional configuration allows the MPLAD18KP11CA to clamp both positive and negative transients symmetrically, eliminating polarity concerns in AC-coupled or floating interfaces - a critical feature for avionics data buses and industrial fieldbus protection.
MPLAD18KP11CA 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):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 989A
- 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
MPLAD18KP11CA FAQ
1.How can I place an order for MPLAD18KP11CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP11CA 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 MPLAD18KP11CA reliable?
The price and inventory of MPLAD18KP11CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP11CA is usually 5 days.
3.What payment methods are accepted for MPLAD18KP11CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP11CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP11CA?
MPLAD18KP11CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP11CA 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 MPLAD18KP11CA?
For technical support, including MPLAD18KP11CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP11CA requirements.
6.How does Aetrix verify that MPLAD18KP11CA is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP11CA 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 MPLAD18KP11CA meets industry standards.
7.What is the process for return or replacement of MPLAD18KP11CA?
All MPLAD18KP11CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP11CA, 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 MPLAD18KP11CA part is unused and in its original packaging.
Return procedure for MPLAD18KP11CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP11CA Tags
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