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Microchip Technology MPLAD18KP10A
- Part No.:
- MPLAD18KP10A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP10A.pdf
- Description:
- TVS DIODE 10VWM 17VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,101
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Product details
Overview
MPLAD18KP10A from Microsemi is a unidirectional 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, clamps at ≤17.0 V under 1059 A peak impulse current, and features a 10 V reverse standoff voltage (VWM) with 11.1–12.3 V breakdown range. It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection and IEC 61000-4-5 Class 1–5 secondary lightning protection.
For engineers reviewing the MPLAD18KP10A datasheet, MPLAD18KP10A pinout, MPLAD18KP10A application, or MPLAD18KP10A equivalent, this device is selected for high-reliability DC bus protection where low clamping voltage, sub-100 ps response time, and multi-stroke lightning resilience are critical - especially in avionics power distribution units, 12 V/24 V vehicle ECUs, and industrial PLC input stages.
Technical Context
The MPLAD18KP10A employs an avalanche diode structure optimized for fast transient response (<100 ps rise time) and low thermal resistance (RθJC = 0.7 °C/W), enabling efficient heat transfer to the PCB copper pad. Its unidirectional polarity places the cathode on the metal base, requiring correct orientation during layout to ensure proper clamping direction relative to system ground.
It operates within -55°C to +150°C junction temperature range and supports steady-state dissipation of 2.5 W at 25°C ambient. Derating applies above 25°C per Figure 3, with full PPP (18 kW) only valid at TC ≤ 100°C and duty factor ≤ 0.05% - critical for repetitive surge environments like alternator load dump simulations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous DC or peak AC voltage the device blocks without conduction; sets minimum system operating voltage margin. |
| V(BR) min/max | 11.1–12.3 V - Breakdown occurs within this range at 1 mA; defines turn-on threshold consistency across production lots. |
| VC @ IPP | ≤17.0 V @ 1059 A - Clamping voltage during 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPP | 18,000 W @ 10/1000 μs - Peak power handling capacity; validates suitability for DO-160 Section 22 multi-stroke lightning events. |
| ID @ VWM | 45 μA - Standby leakage at rated standoff; low enough to avoid measurable power loss in battery-backed or low-quiescent systems. |
| RθJC | 0.7 °C/W - Junction-to-case thermal resistance; enables direct mounting to heatsink or large copper pour for sustained surge duty. |
| TJ Range | -55°C to +150°C - Qualified operating range; supports under-hood automotive and avionics bay deployments. |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anode Down) with metal base cathode termination. Void-free UL94V-0 epoxy body; tin-lead or RoHS-compliant matte-tin plating; weight ≈1 g. Dimensions: 12.32 × 10.54 × 3.68 mm (L × W × H), with recommended FR4 pad layout per RF01215 Rev B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Surface) | Positive input terminal | Connected to protected line (e.g., battery feed); must be routed with low-inductance trace to minimize overshoot. |
| Cathode (Metal Base) | Ground reference / clamping node | Must be soldered directly to large copper pour or heatsink; serves as primary thermal and electrical return path. |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW peak pulse rating | Validated for RTCA DO-160F Section 22 multi-stroke lightning testing - enables single-device compliance without external series impedance. |
| 0.7 °C/W RθJC | Enables >90% of surge energy to dissipate into PCB copper, reducing localized hot spots and improving reliability over repeated transients. |
| 1059 A IPP capability | Supports protection of 12 V systems against 100 V/10 Ω load dump surges (ISO 7637-2 Pulse 5a) without derating. |
| AEC-Q101 qualification | Confirms robustness for automotive under-hood applications including temperature cycling, humidity bias, and mechanical shock. |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints - simplifies SMT assembly and reduces handling cost. |
Applications
| Avionics Power Distribution | Automotive ECU Input Protection |
|---|---|
Use Scenario: Protecting 28 V DC bus inputs in flight control computers against induced lightning transients per DO-160F Section 22 Waveform 4 (6.4/69 μs). IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converters and microcontroller power rails. Use Value: Limits transient voltage to ≤17.0 V, preventing latch-up or damage to 3.3 V/5 V logic supplies while surviving ≥1000 multi-stroke events. | Use Scenario: Safeguarding LIN/CAN transceiver power pins in body control modules exposed to ISO 7637-2 Pulse 5a load dump (120 V, 10 Ω source). IC Role / Device Role / Timing Role: Unidirectional TVS shunting surge energy to chassis ground before it reaches sensitive analog front-ends. Use Value: Clamps within <100 ps and sustains 1059 A peak current, ensuring transceivers remain operational after repeated 12 V system surges. |
| Industrial PLC Digital Input | Renewable Energy Charge Controller |
Use Scenario: Protecting 24 V digital input channels in programmable logic controllers subjected to IEC 61000-4-5 42 Ω source impedance surges (Class 4, 4 kV). IC Role / Device Role / Timing Role: First-line defense on field-side terminals, mounted directly at connector entry point. Use Value: Withstands 18 kW pulses without degradation, maintaining ≤17.0 V clamping to preserve optocoupler isolation integrity and prevent false triggering. | Use Scenario: Shielding MPPT controller MOSFET gate drivers from solar panel string surges induced by nearby lightning strikes. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; unidirectional MPLAD18KP10A placed between PV+ and ground to clamp positive transients only. Use Value: 11.1–12.3 V breakdown ensures stable turn-on during slow-rising PV open-circuit voltage spikes, avoiding premature conduction during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ10A | 600 W PPP rating, 10.0 V VWM, 17.0 V VC @ 35.2 A - 30× lower peak power handling. | Suitable only for low-energy ESD/EFT (IEC 61000-4-2/4-4), not lightning or load dump. | Select SMBJ10A only when surge threat level is limited to human-body-model ESD or low-current switching noise. |
| SMCJ10A | 1500 W PPP rating, 10.0 V VWM, 17.0 V VC @ 87.6 A - 12× lower peak power than MPLAD18KP10A. | Meets IEC 61000-4-5 Class 3 (2 kV) but fails Class 4/5 and DO-160F Level 4/5 requirements. | Choose SMCJ10A for cost-sensitive industrial controls where full lightning immunity is not mandated. |
Compared with SMBJ10A and SMCJ10A, the MPLAD18KP10A provides 30× and 12× higher peak pulse power respectively - enabling single-device compliance with aircraft lightning standards and automotive load dump without cascaded protection stages or external current-limiting resistors.
Availability
MPLAD18KP10A is available at Aetrix Electronics and suitable for avionics power distribution, automotive ECU input protection, and industrial PLC digital input applications requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified surge resilience.
Supply support for MPLAD18KP10A 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 solutions for aerospace, defense, and industrial markets.
The MPLAD18KP10A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning and automotive load dump protection where conventional SMC/SMB packages fail due to thermal saturation.
FAQ
What is the clamping voltage of the MPLAD18KP10A under maximum rated surge current?
The MPLAD18KP10A has a maximum clamping voltage (VC) of 17.0 V when subjected to its peak impulse current (IPP) of 1059 A under the standard 10/1000 μs waveform. This value is measured at 25°C and represents the upper limit of voltage seen by downstream circuitry during worst-case surge events - critical for ensuring compatibility with 3.3 V, 5 V, or 12 V system components.
Is the MPLAD18KP10A suitable for bidirectional surge protection?
No, the MPLAD18KP10A is a unidirectional TVS diode, meaning it conducts only during positive transients relative to its cathode (metal base). For bidirectional protection, the equivalent part is MPLAD18KP10CA. Using MPLAD18KP10A in AC or floating-bus applications without polarity awareness may result in failure to clamp negative-going surges.
Does the MPLAD18KP10A require a heatsink for full 18 kW surge capability?
The MPLAD18KP10A does not require an external heatsink for single-event 18 kW surges, as energy dissipation is transient. However, its RθJC of 0.7 °C/W assumes direct thermal coupling to a large PCB copper area (≥25 cm²) or metal core board. Without adequate copper pour, junction temperature may exceed 150°C during repetitive surges, triggering thermal runaway - so PCB layout is integral to MPLAD18KP10A performance.
What standards does the MPLAD18KP10A meet for automotive applications?
The MPLAD18KP10A is qualified to AEC-Q101 for stress testing and supports compliance with ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 (lightning surge) up to Class 4 with 42 Ω source impedance. It is explicitly listed in Microsemi documentation for RTCA DO-160F Level 4 pin injection protection - making it suitable for automotive-grade avionics and high-reliability vehicle ECUs.
How does the MPLAD18KP10A differ from standard SMCJ10A TVS diodes?
The MPLAD18KP10A delivers 18,000 W peak pulse power - 12× higher than the 1500 W rating of SMCJ10A - due to its larger die, metal-base thermal path, and optimized package geometry. Unlike SMCJ10A, the MPLAD18KP10A is validated for RTCA DO-160F multi-stroke lightning and supports full 1059 A IPP without derating, making it appropriate for mission-critical aerospace and heavy-duty automotive systems where SMCJ10A would fail catastrophically.
MPLAD18KP10A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 1059A (1.059kA)
- 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
MPLAD18KP10A FAQ
1.How can I place an order for MPLAD18KP10A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP10A 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 MPLAD18KP10A reliable?
The price and inventory of MPLAD18KP10A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP10A is usually 5 days.
3.What payment methods are accepted for MPLAD18KP10A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP10A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP10A?
MPLAD18KP10A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP10A 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 MPLAD18KP10A?
For technical support, including MPLAD18KP10A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP10A requirements.
6.How does Aetrix verify that MPLAD18KP10A is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP10A 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 MPLAD18KP10A meets industry standards.
7.What is the process for return or replacement of MPLAD18KP10A?
All MPLAD18KP10A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP10A, 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 MPLAD18KP10A part is unused and in its original packaging.
Return procedure for MPLAD18KP10A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP10A Tags
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