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Microchip Technology MAPLAD18KP10A
- Part No.:
- MAPLAD18KP10A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP10A.pdf
- Description:
- TVS DIODE 10VWM 17VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:3,945
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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 widely deployed in aircraft lightning protection per RTCA DO-160 Section 22.
For engineers reviewing the MPLAD18KP10A datasheet, MPLAD18KP10A pinout, MPLAD18KP10A application, or MPLAD18KP10A equivalent, key selection criteria include its 10 V VWM rating, 17.0 V max clamping voltage at 1059 A, 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
The MPLAD18KP10A employs an avalanche diode structure optimized for fast response (<100 ps rise time) and high-energy absorption in unidirectional configuration. Its metal-base cathode construction enables direct thermal coupling to heatsinks, supporting sustained operation under multi-stroke transients per RTCA DO-160F Waveform 4 (Level 4) and IEC 61000-4-5 (Class 1–5, 42 Ω source).
It operates across –55 °C to +150 °C junction temperature, with 50 °C/W junction-to-ambient thermal resistance on FR4 PCB using recommended pad layout. Standby leakage is limited to 45 μA at 10 V VWM, and it meets ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and RFI suppression requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous DC or peak AC voltage the device blocks without conduction. |
| V(BR) min/max | 11.1–12.3 V - Breakdown occurs within this range at specified test current, defining turn-on threshold. |
| VC @ IPP | ≤17.0 V at 1059 A - Clamping voltage during worst-case 10/1000 μs surge; determines protected circuit's maximum overvoltage exposure. |
| PPP | 18,000 W @ 10/1000 μs - Peak power handling capability; validates suitability for lightning and load-dump events. |
| RθJC | 0.7 °C/W - Enables efficient heat transfer from junction to heatsink, critical for repetitive surge duty cycles. |
| ID @ VWM | 45 μA - Low leakage ensures minimal power loss and signal integrity in standby operation. |
| Polarity | Unidirectional - Cathode on metal base; requires correct orientation for DC-biased protection paths. |
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, ~1 g weight. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), with recommended FR4 pad layout per RF01215 Rev B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface pads) | Transient current entry point | Connected to protected line; conducts surge current toward cathode during overvoltage. |
| Cathode (metal base) | Transient current return path & thermal interface | Must be soldered to copper pour or heatsink; serves as primary thermal conduction path and circuit ground reference. |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW peak pulse rating | Validated for multi-stroke lightning per RTCA DO-160 Section 22, enabling single-device secondary protection in avionics. |
| 0.7 °C/W RθJC | Enables >70 W steady-state dissipation at TC = 100 °C when mounted on heatsink-supports hybrid surge + bias operation. |
| Level 4 pin injection immunity (DO-160F Waveform 4) | Withstands 6.4/69 μs transients up to 1059 A without degradation-meets stringent aircraft wiring harness requirements. |
| AEC-Q101 qualified | Guarantees reliability for automotive 12 V/24 V load-dump protection in engine control units and battery management systems. |
| Moisture sensitivity Level 1 | No dry-pack or bake-out required before reflow-reduces manufacturing overhead and avoids moisture-induced popcorning. |
Applications
| Aircraft Lightning Protection | Automotive Load-Dump Suppression |
|---|---|
Use Scenario: Protecting avionics power inputs against induced surges from lightning strikes on airframe structures per RTCA DO-160F Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS placed at main DC input stage to clamp transients before they reach DC/DC converters and flight control processors. Use Value: 18,000 W PPP and <100 ps response ensure compliance with Level 4 waveform 4 (6.4/69 μs), limiting bus overvoltage to ≤17.0 V during multi-stroke events. | Use Scenario: Safeguarding 12 V automotive ECUs during alternator load-dump events (ISO 7637-2 Pulse 5a), where voltage spikes exceed 120 V. IC Role / Device Role / Timing Role: Primary clamping device on battery feed line, positioned upstream of LDOs and microcontrollers to absorb >1000 A surge currents. Use Value: 10 V VWM matches nominal system voltage while 17.0 V clamping prevents damage to 20 V-rated downstream ICs-validated per AEC-Q101 stress testing. |
| Industrial Motor Drive DC Bus | Telecom Power Interface |
Use Scenario: Mitigating switching transients and inductive kickback on 24–48 V DC bus lines feeding variable-frequency drives and servo controllers. IC Role / Device Role / Timing Role: Bidirectional-capable variant (MPLAD18KP10CA) used across bus rails; unidirectional MPLAD18KP10A applied where polarity is fixed and ground-referenced. Use Value: 0.7 °C/W RθJC allows direct mounting to aluminum chassis, sustaining repeated 10/1000 μs surges without thermal runaway-critical for factory automation uptime. | Use Scenario: Secondary surge protection on -48 V telecom rectifier outputs exposed to induced surges from nearby lightning or grid switching. IC Role / Device Role / Timing Role: High-power TVS placed after primary MOV-based protection to handle residual fast-rising energy that bypasses slower components. Use Value: 1059 A IPP rating and 17.0 V clamping ensure protected DC-DC modules remain within safe operating area during IEC 61000-4-5 Class 4 (42 Ω source) tests. |
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 V VWM, SMC package, 17.0 V clamping at 35.2 A IPP | Lower energy handling; suitable only for consumer-grade or non-safety-critical surges | Select SMBJ10A only for cost-sensitive, low-risk applications where 18 kW capability is unnecessary. |
| SMCJ10A | 1500 W PPP rating, 10 V VWM, SMC package, 17.0 V clamping at 88.2 A IPP | Lacks RTCA DO-160F qualification and AEC-Q101 validation; no multi-stroke lightning data | Use SMCJ10A for industrial controls with moderate surge exposure but no aviation or automotive certification requirements. |
Compared with SMBJ10A and SMCJ10A, the MPLAD18KP10A provides 30× and 12× higher peak pulse power respectively, validated clamping performance under multi-stroke lightning, and full traceability for high-reliability programs-making it irreplaceable in certified aerospace and automotive safety systems.
Availability
MPLAD18KP10A is available at Aetrix Electronics and suitable for aircraft lightning protection, automotive load-dump suppression, and industrial motor drive DC bus applications requiring stable component supply across extended production lifecycles.
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 high-power PLAD TVS family, engineered specifically for certified secondary lightning protection and mission-critical surge immunity where standard TVS diodes fail to meet DO-160, AEC-Q101, or IEC 61000-4-5 Class 4/5 requirements.
FAQ
What is the clamping voltage of MPLAD18KP10A at its rated peak pulse current?
The MPLAD18KP10A has a maximum clamping voltage (VC) of 17.0 V at its rated peak pulse current (IPP) of 1059 A under 10/1000 μs waveform conditions. This value is measured per JEDEC standards and guarantees the protected circuit sees no more than 17.0 V during worst-case surge events-critical for safeguarding 20 V-rated downstream components. The MPLAD18KP10A maintains this clamping performance across its full operating temperature range.
Is MPLAD18KP10A qualified for automotive applications?
Yes, the MPLAD18KP10A is qualified to AEC-Q101 for automotive use, including rigorous stress testing for temperature cycling, humidity, and mechanical shock. It is specifically designed for 12 V and 24 V load-dump protection in engine control units, battery management systems, and ADAS modules. Its 10 V VWM and 17.0 V clamping align with ISO 7637-2 Pulse 5a requirements, and its 0.7 °C/W RθJC supports reliable thermal management in under-hood environments.
Does MPLAD18KP10A require special handling for moisture sensitivity?
No, the MPLAD18KP10A has IPC/JEDEC J-STD-020B moisture sensitivity level (MSL) 1, meaning it is not moisture-sensitive and does not require dry packing, baking, or floor-life controls before reflow soldering. This simplifies manufacturing logistics and eliminates risk of popcorning during assembly-confirmed in RF01215 Rev B documentation. The MPLAD18KP10A can be processed directly from tape-and-reel using standard lead-free reflow profiles.
How does MPLAD18KP10A perform under RTCA DO-160F lightning test conditions?
The MPLAD18KP10A is validated for RTCA DO-160F Section 22 lightning-induced transient testing, specifically Waveform 4 (6.4/69 μs) at Level 4. It withstands repeated 1059 A surges without parameter shift or failure, meeting multi-stroke requirements essential for aircraft power distribution systems. Its 18,000 W PPP rating and <100 ps response time ensure compliance-data confirmed in Microsemi's RF01215 Rev B application note.
What is the thermal resistance and how should MPLAD18KP10A be mounted for optimal cooling?
The MPLAD18KP10A has a junction-to-case thermal resistance (RθJC) of 0.7 °C/W and junction-to-ambient (RθJA) of 50 °C/W on FR4 with recommended pad layout. For optimal cooling, the metal base (cathode) must be soldered to a minimum 25 mm² copper pour or external heatsink using void-free reflow. Thermal vias beneath the base improve conduction; derating curves in RF01215 Rev B show 71 W steady-state dissipation possible at TC = 100 °C-critical for sustained surge duty cycles.
MAPLAD18KP10A 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
MAPLAD18KP10A FAQ
1.How can I place an order for MAPLAD18KP10A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP10A 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 MAPLAD18KP10A reliable?
The price and inventory of MAPLAD18KP10A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP10A is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP10A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP10A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP10A?
MAPLAD18KP10A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP10A 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 MAPLAD18KP10A?
For technical support, including MAPLAD18KP10A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP10A requirements.
6.How does Aetrix verify that MAPLAD18KP10A is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP10A 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 MAPLAD18KP10A meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP10A?
All MAPLAD18KP10A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP10A, 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 MAPLAD18KP10A part is unused and in its original packaging.
Return procedure for MAPLAD18KP10A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP10A Tags
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