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Microchip Technology MPLAD18KP9.0CA
- Part No.:
- MPLAD18KP9.0CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP9.0CA.pdf
- Description:
- TVS DIODE 9VWM 15.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,745
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Product details
Overview
MPLAD18KP9.0CA 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, features a 9.0 V reverse standoff voltage (VWM), clamps to ≤15.4 V at 1169 A peak impulse current (IPP), and meets RTCA DO-160F Level 4 pin injection for Waveform 4.
For engineers reviewing the MPLAD18KP9.0CA datasheet, MPLAD18KP9.0CA pinout, MPLAD18KP9.0CA application, or MPLAD18KP9.0CA equivalent, this device is selected for secondary lightning protection per IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances), ESD/EFT immunity per IEC 61000-4-2/4-4, and load dump suppression in avionics power distribution units.
Technical Context
The MPLAD18KP9.0CA employs an avalanche diode structure optimized for low clamping ratio (VC/VWM ≈ 1.71) and sub-5 ns response time. Its metal-base thermal path achieves 0.7 °C/W junction-to-case thermal resistance, enabling sustained multi-stroke operation under RTCA DO-160 Section 22 test conditions.
It supports bidirectional transient suppression without polarity sensitivity, with breakdown voltage V(BR) specified at 10.0–11.1 V @ I(BR), and exhibits a +8.0 mV/°C temperature coefficient of V(BR), ensuring predictable voltage drift across –55°C to +150°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - enables single-device protection against lightning-induced surges per DO-160F Waveform 4/5A |
| Reverse Standoff Voltage (VWM) | 9.0 V - sets maximum continuous operating voltage before clamping activation in 12 V automotive/avionics rails |
| Clamping Voltage (VC) | ≤15.4 V @ IPP = 1169 A - limits downstream IC stress to safe levels during 10/1000 μs transients |
| Breakdown Voltage (V(BR)) | 10.0–11.1 V @ I(BR) - defines precise avalanche onset threshold for repeatable protection triggering |
| Thermal Resistance (RθJC) | 0.7 °C/W - allows efficient heat transfer to PCB copper pour or heatsink, critical for >0.05% duty cycle applications |
| Standby Current (ID) | ≤60 μA @ VWM - ensures negligible leakage in always-on power monitoring circuits |
| Temperature Coefficient (αV(BR)) | +8.0 mV/°C - enables accurate derating of clamping margin over full industrial temperature range |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anodeless Diode) with metal baseplate for thermal conduction. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ~1 g. Cathode connected to metal base (bottom side); anode terminals on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Pad) | Transient current entry point (bidirectional) | Accepts surge energy from either polarity; connects to protected line via minimal-inductance trace |
| Cathode (Metal Base) | Common return path / thermal interface | Provides low-impedance ground reference and primary heat dissipation path to PCB copper or heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Eliminates polarity installation errors in differential signal lines and AC-coupled power rails |
| 0.7 °C/W RθJC thermal resistance | Supports >1000 surge cycles at 0.05% duty factor without thermal runaway on 2 oz. copper FR4 |
| RTCA DO-160F Waveform 4 Level 4 compliance | Validated for 6.4/69 μs pin injection at 25°C - required for commercial aircraft flight control electronics |
| IEC 61000-4-5 Class 4 support (42 Ω source) | Meets secondary lightning protection for avionics power inputs per EN 55032/55035 |
| Moisture Sensitivity Level 1 | Enables standard SMT reflow without dry-pack baking or floor-life constraints |
Applications
| Avionics Power Distribution Unit | Automotive Engine Control Module (ECM) |
|---|---|
Use Scenario: Protecting 28 V DC bus inputs in airborne power management systems against lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary secondary surge clamp at board-level input filter stage, responding within <5 ns to limit voltage to ≤15.4 V. Use Value: Enables compliance with FAA AC 20-136A by sustaining ≥1000 multi-stroke 18 kW surges without degradation. | Use Scenario: Safeguarding ECM microcontroller supply rails during ISO 7637-2 Load Dump events (up to 60 V, 400 ms). IC Role / Device Role / Timing Role: Fast-acting shunt protector placed directly at connector entry, clamping before upstream L-C filters attenuate energy. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V logic ICs by holding rail voltage below 16 V during 12 V system transients. |
| Industrial Motor Drive DC Link | Railway Signaling Interface |
Use Scenario: Suppressing switching spikes and regenerative energy surges on 400 V DC link buses in variable-frequency drives. IC Role / Device Role / Timing Role: High-power TVS parallel to bulk capacitor, absorbing repetitive 10/1000 μs transients up to 18 kW per stroke. Use Value: Extends electrolytic capacitor lifetime by reducing RMS ripple voltage stress during IGBT commutation events. | Use Scenario: Hardening 75 Ω coaxial data lines in ERTMS/ETCS Level 2 trackside signaling equipment against induced surges. IC Role / Device Role / Timing Role: Bidirectional line protector on RS-485/RS-422 physical layer, symmetrically clamping both conductors to common ground. Use Value: Maintains signal integrity during 1 kV/0.5 J surges by limiting differential-mode overvoltage to <10 Vpp without adding capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | 600 W PPP rating, 5.0 V higher clamping voltage (VC = 14.4 V), 2.5× larger RθJA (15 °C/W) | Not qualified for DO-160F Level 4 or IEC 61000-4-5 Class 4; limited to consumer-grade industrial use | Select when cost sensitivity outweighs aerospace qualification requirements and surge energy remains <1 kJ |
| SMCJ9.0CA | 1500 W PPP rating, same VWM/VC specs, but lacks MIL-PRF-19500 screening options and DO-160F validation | Approved for AEC-Q101 but not RTCA DO-160F; suitable for automotive body electronics, not flight-critical systems | Choose for automotive infotainment or ADAS modules where DO-160 compliance is unnecessary |
Compared with SMBJ9.0CA and SMCJ9.0CA, the MPLAD18KP9.0CA provides 30× higher peak power handling, certified DO-160F Level 4 immunity, and a metal-base thermal path enabling reliable operation in high-reliability avionics environments where sustained multi-stroke surge endurance is mandatory.
Availability
MPLAD18KP9.0CA is available at Aetrix Electronics and suitable for avionics power distribution, automotive engine control, and industrial motor drive applications requiring stable component supply, long-term lifecycle support, and certified surge immunity.
Supply support for MPLAD18KP9.0CA 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 semiconductors for aerospace, defense, and industrial markets, with expertise in radiation-hardened ICs, timing devices, and power protection solutions.
The MPLAD18KP9.0CA belongs to Microsemi's high-power PLAD TVS family, engineered specifically for DO-160F-compliant lightning protection in commercial and military aircraft electrical systems.
FAQ
What is the maximum clamping voltage of the MPLAD18KP9.0CA at its rated peak pulse current?
The MPLAD18KP9.0CA has a maximum clamping voltage (VC) of 15.4 V when subjected to its rated peak impulse current (IPP) of 1169 A under 10/1000 μs waveform conditions. This value is guaranteed per the manufacturer's electrical characteristics table and ensures downstream circuitry remains within safe operating voltage limits during surge events. The clamping performance is validated across the full –55°C to +150°C junction temperature range.
Does the MPLAD18KP9.0CA meet RTCA DO-160F lightning protection requirements?
Yes, the MPLAD18KP9.0CA is explicitly qualified for RTCA DO-160F Section 22 lightning-induced transient testing. It meets Level 4 for pin injection with Waveform 4 (6.4/69 μs) and supports secondary lightning protection per IEC 61000-4-5 across multiple source impedances (42 Ω, 12 Ω, and 2 Ω). These qualifications are documented in Microsemi's RF01215 Rev B datasheet and apply directly to the MPLAD18KP9.0CA variant.
How is thermal management implemented in the MPLAD18KP9.0CA package?
The MPLAD18KP9.0CA uses a metal-base PLAD package where the cathode is electrically and thermally connected to the exposed metal bottom surface. This design achieves a junction-to-case thermal resistance (RθJC) of 0.7 °C/W, allowing efficient heat transfer to the PCB copper pour or external heatsink. Recommended pad layout includes ≥250 mm² of 2 oz. copper connected to the baseplate to sustain multi-stroke surge duty cycles per DO-160F.
What is the polarity configuration of the MPLAD18KP9.0CA, and how does it affect PCB layout?
The MPLAD18KP9.0CA is a bidirectional TVS, indicated by the "CA" suffix, meaning it protects against transients of either polarity without regard to orientation. Its cathode is the metal baseplate (bottom side), while the anode connects to the top-side terminal. PCB layout must expose the metal base to a large copper area for thermal conduction, and no polarity marking is required during placement-unlike unidirectional variants such as MPLAD18KP9.0A.
Is the MPLAD18KP9.0CA compliant with RoHS and moisture sensitivity standards?
Yes, the MPLAD18KP9.0CA is RoHS compliant (e3 marking) and classified as Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it requires no dry-pack packaging or bake-out prior to SMT reflow. The device uses void-free UL94V-0 epoxy molding compound and annealed matte-tin plating compatible with lead-free soldering processes up to 260°C for 10 seconds.
MPLAD18KP9.0CA 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 1169A (1.169kA)
- 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
MPLAD18KP9.0CA FAQ
1.How can I place an order for MPLAD18KP9.0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP9.0CA 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 MPLAD18KP9.0CA reliable?
The price and inventory of MPLAD18KP9.0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP9.0CA is usually 5 days.
3.What payment methods are accepted for MPLAD18KP9.0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP9.0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP9.0CA?
MPLAD18KP9.0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP9.0CA 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 MPLAD18KP9.0CA?
For technical support, including MPLAD18KP9.0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP9.0CA requirements.
6.How does Aetrix verify that MPLAD18KP9.0CA is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP9.0CA 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 MPLAD18KP9.0CA meets industry standards.
7.What is the process for return or replacement of MPLAD18KP9.0CA?
All MPLAD18KP9.0CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP9.0CA, 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 MPLAD18KP9.0CA part is unused and in its original packaging.
Return procedure for MPLAD18KP9.0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP9.0CA Tags
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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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