My Inquiry
My Account
Microchip Technology MAPLAD18KP180A
- Part No.:
- MAPLAD18KP180A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP180A.pdf
- Description:
- TVS DIODE 180VWM 291VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:3,387
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAPLAD18KP180A from Microsemi is a 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 180 V reverse standoff voltage (VWM), clamps to ≤291 V at 100 A peak impulse current, and operates across –55°C to +150°C junction temperature. It is qualified to AEC-Q101 and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection requirements.
For engineers reviewing the MAPLAD18KP180A datasheet, MAPLAD18KP180A pinout, MAPLAD18KP180A application, or MAPLAD18KP180A equivalent, this device is selected for high-reliability DC bus protection in aircraft avionics, engine control units, and industrial power supplies where multi-stroke lightning immunity and low thermal resistance are critical.
Technical Context
The MAPLAD18KP180A is a unidirectional TVS diode with cathode on the metal base (package bottom), optimized for fast clamping response (<100 ps rise time) and minimal thermal resistance (RθJC = 0.7 °C/W). Its void-free thermosetting epoxy package meets UL94V-0 and supports soldering per MIL-STD-750 Method 2026.
It is rated for 100% surge testing per lot, includes 3σ lot norm screening on standby current (ID), and supports optional upscreening per MIL-PRF-19500. Moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1 - no dry pack required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 180 V - maximum continuous DC or peak AC voltage the device blocks without conduction |
| V(BR) min/max | 200–221 V - breakdown occurs within this range at specified test current, defining turn-on threshold |
| VC @ IPP | 291 V max at 100 A - clamping voltage during 10/1000 μs surge, limiting downstream voltage stress |
| PPP | 18,000 W - peak pulse power handling capability under standardized 10/1000 μs waveform |
| ID @ VWM | 10 μA max - ultra-low leakage ensures minimal standby power loss in high-impedance circuits |
| RθJC | 0.7 °C/W - enables efficient heat transfer to heatsink, critical for repeated surge duty cycles |
| Junction Temp | –55°C to +150°C - supports operation in extreme environments including engine bays and avionics bays |
Pinout & Package
MAPLAD18KP180A uses a surface-mount plastic package with metal base cathode termination. The case is void-free thermosetting epoxy (UL94V-0), terminals are annealed matte-tin plated, and polarity is marked: cathode is the metal base (bottom side of device).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface pad) | Transient current entry point | Connected to protected line; conducts surge current toward cathode during overvoltage event |
| Cathode (metal base) | Transient current return path | Mounted directly to PCB copper pour or heatsink; provides lowest-inductance, lowest-resistance path to ground/reference |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW peak pulse rating | Enables single-device protection against severe lightning-induced transients per RTCA DO-160 Section 22 |
| 0.7 °C/W junction-to-case thermal resistance | Supports >500 surge events at 0.05% duty cycle when mounted on FR4 with recommended pad layout |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and chassis applications subject to vibration, thermal cycling, and humidity |
| RoHS-compliant (e3 marking) | Meets global environmental compliance requirements without compromising surge performance or thermal robustness |
| Level 1 moisture sensitivity | Eliminates baking requirement prior to reflow, reducing manufacturing cost and process complexity |
Applications
| Aircraft Engine Control Units | Automotive Load Dump Protection |
|---|---|
Use Scenario: Protecting 28 V DC power inputs in FADEC modules from induced surges during lightning strikes or generator switching. IC Role / Device Role / Timing Role: Primary clamping device placed at board-level input filter stage to limit voltage to <300 V during DO-160F Waveform 4 Level 4 transients. Use Value: Prevents latch-up or destruction of downstream DC-DC controllers and microcontrollers by clamping within 100 ps while dissipating 18 kW peak energy. | Use Scenario: Safeguarding infotainment and ADAS ECUs during alternator load dump events in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional TVS connected between battery rail and ground, absorbing 120 V/400 ms transients per ISO 7637-2 Pulse 5a. Use Value: Maintains system uptime by suppressing transients before they exceed 291 V clamping voltage, avoiding reset or damage to 3.3 V/5 V logic rails. |
| Industrial DC Power Distribution | Avionics Data Bus Protection |
Use Scenario: Securing 48 V telecom or factory automation power feeds against switching transients from contactors and motor drives. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of DC-DC converters to absorb repetitive 18 kW surges without degradation. Use Value: Extends system lifetime via 100% lot surge testing and 3σ ID screening-ensuring consistent leakage and clamping behavior across production lots. | Use Scenario: Shielding ARINC 429 or MIL-STD-1553 data lines from ESD and RFI coupling in airborne communication subsystems. IC Role / Device Role / Timing Role: Secondary protection element used alongside common-mode chokes and series resistors to meet RTCA DO-160F Section 22 multi-stroke lightning requirements. Use Value: Achieves Class 4/5 IEC 61000-4-5 immunity with 42 Ω source impedance due to low dynamic impedance and sub-100 ps response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ180A | 600 W PPP rating, SMA package, RθJA ≈ 40 °C/W, no AEC-Q101 or DO-160 qualification | Targeted at commercial-grade consumer/industrial power supplies, not certified for aerospace or automotive safety-critical use | Select only for cost-sensitive non-safety applications where 18 kW surge immunity is unnecessary |
| Vishay V180AHM3/H | 1500 W PPP, DO-214AB package, 180 V VWM, but lacks RTCA DO-160F Waveform 4 Level 4 validation and MIL-PRF-19500 upscreening options | Suitable for general-purpose industrial surge suppression, not validated for multi-stroke lightning or high-reliability avionics | Choose when full DO-160F compliance and lot traceability are not required |
Compared with SMAJ180A and V180AHM3/H, MAPLAD18KP180A delivers 30× higher peak pulse power, certified aerospace-grade reliability, and validated multi-stroke lightning performance-making it the only option for DO-160F Section 22-compliant aircraft systems and AEC-Q101 automotive powertrain designs.
Availability
MAPLAD18KP180A is available at Aetrix Electronics and suitable for aircraft engine control units, automotive load dump protection, and industrial DC power distribution requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD18KP180A 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, RF, timing, and radiation-hardened solutions for aerospace, defense, and industrial markets.
The MAPLAD18KP180A belongs to Microsemi's PLAD family of high-power surface-mount TVS diodes, engineered specifically for multi-stroke lightning protection and automotive load dump immunity in mission-critical systems.
FAQ
What is the clamping voltage of MAPLAD18KP180A at its rated peak pulse current?
The MAPLAD18KP180A has a maximum clamping voltage (VC) of 291 V at 100 A peak impulse current under 10/1000 μs waveform conditions. This value is measured per Figure 3 in RF01215 Rev B and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The clamping performance is guaranteed across the full operating temperature range and validated per lot.
Is MAPLAD18KP180A qualified for automotive applications?
Yes, MAPLAD18KP180A is fully qualified to AEC-Q101 for automotive applications. It undergoes wafer fabrication and assembly lot traceability, 100% surge testing, and 3σ lot norm screening on standby current (ID). Its thermal resistance (RθJC = 0.7 °C/W) and wide junction temperature range (–55°C to +150°C) make it suitable for engine control, battery management, and ADAS power rail protection.
Does MAPLAD18KP180A meet RTCA DO-160F lightning protection requirements?
Yes, MAPLAD18KP180A is validated for RTCA DO-160F Section 22 lightning-induced transient protection. Specifically, it achieves Waveform 4 (6.4/69 μs) Level 4 immunity and supports multi-stroke testing. Its 18,000 W peak pulse power rating and low clamping voltage ensure compliance with aircraft-level surge standards when mounted per recommended pad layout on FR4.
What is the polarity configuration and mounting orientation for MAPLAD18KP180A?
MAPLAD18KP180A is a unidirectional TVS diode with cathode on the metal base (bottom side of the package). During PCB layout, the metal base must be soldered directly to a large copper pour or heatsink to realize the specified RθJC = 0.7 °C/W. The top surface pad is the anode and connects to the line being protected. Polarity marking follows standard diode convention.
Can MAPLAD18KP180A be used in bidirectional configurations?
No, MAPLAD18KP180A is unidirectional only. For bidirectional operation at 180 V standoff, the correct variant is MAPLAD18KP180CA (CA suffix denotes bidirectional construction). The CA version provides symmetrical clamping for AC-coupled or floating signal lines, whereas MAPLAD18KP180A is intended for DC rail protection with defined polarity.
MAPLAD18KP180A 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):
- 180V
- Voltage - Breakdown (Min):
- 200V
- Voltage - Clamping (Max) @ Ipp:
- 291V
- Current - Peak Pulse (10/1000µs):
- 62A
- 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
MAPLAD18KP180A FAQ
1.How can I place an order for MAPLAD18KP180A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP180A 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 MAPLAD18KP180A reliable?
The price and inventory of MAPLAD18KP180A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP180A is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP180A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP180A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP180A?
MAPLAD18KP180A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP180A 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 MAPLAD18KP180A?
For technical support, including MAPLAD18KP180A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP180A requirements.
6.How does Aetrix verify that MAPLAD18KP180A is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP180A 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 MAPLAD18KP180A meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP180A?
All MAPLAD18KP180A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP180A, 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 MAPLAD18KP180A part is unused and in its original packaging.
Return procedure for MAPLAD18KP180A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP180A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
