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Microchip Technology MAPLAD18KP17AE3
- Part No.:
- MAPLAD18KP17AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP17AE3.pdf
- Description:
- TVS DIODE 17VWM 27.6VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:9,065
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Product details
Overview
MAPLAD18KP17AE3 from Microsemi is a unidirectional 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 ≤27.6 V under 653 A peak impulse current, and features a 17 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (18.9–20.9 V). It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection for lightning protection.
For engineers reviewing the MAPLAD18KP17AE3 datasheet, MAPLAD18KP17AE3 pinout, MAPLAD18KP17AE3 application, or MAPLAD18KP17AE3 equivalent, this device is selected for high-reliability secondary lightning protection, load dump suppression, and ESD/EFT hardening where low thermal resistance (RθJC = 0.7 °C/W), RoHS-compliant matte-tin terminations, and MIL-PRF-19500 upscreening capability are critical.
Technical Context
This TVS diode operates as a clamping-type overvoltage protector using an avalanche junction. Its unidirectional polarity places the cathode on the metal base (package bottom), requiring PCB layout with thermal pad grounding for optimal heat dissipation. The device achieves <100 ps response time from 0 V to V(BR) min and maintains stable clamping performance across -55°C to +150°C junction temperature range.
It is characterized for IEC 61000-4-5 compliance at multiple source impedances (42 Ω, 12 Ω, 2 Ω) and supports multi-stroke lightning testing per RTCA DO-160 Section 22. Standby leakage is tightly controlled (ID ≤10 μA @ VWM), and steady-state power dissipation is rated at 2.5 W (TA = 25°C) and 71 W (TC = 100°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - enables single-device protection against severe lightning transients without cascaded stages |
| Reverse Standoff Voltage (VWM) | 17 V - matches nominal 12 V automotive or avionics bus systems with margin for ripple and tolerance |
| Clamping Voltage (VC) | ≤27.6 V @ IPP = 653 A - ensures downstream ICs rated to 30 V remain within safe operating area during surge |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - allows efficient heat transfer to heatsink or copper pour, critical for repeated surge duty |
| Breakdown Voltage (V(BR)) | 18.9–20.9 V @ I(BR) - guarantees reliable turn-on before system damage threshold is exceeded |
| Standby Leakage Current | ≤10 μA @ 17 V - minimizes quiescent power loss in always-on vehicle subsystems |
| Response Time | <100 ps - faster than most microcontrollers' interrupt latency, enabling pre-failure circuit protection |
Pinout & Package
MAPLAD18KP17AE3 uses a thermally enhanced surface-mount package with a metal base (cathode) and top-side anode terminal. The case is void-free UL94V-0 epoxy; terminals feature RoHS-compliant annealed matte-tin plating per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary thermal path and DC return node; must be soldered to large copper pour or heatsink |
| Top-Side Terminal | Anode | Signal input node; connects to protected line (e.g., battery feed, sensor line, or data bus) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive underhood environments including temperature cycling, humidity, and mechanical shock |
| RTCA DO-160F Level 4 Pin Injection | Withstands 6.4/69 μs waveform at 25°C - certified for aircraft avionics interface protection |
| MIL-PRF-19500 Upscreening Options | Enables M, MA, MX, or MXL reliability levels for mission-critical defense/aerospace deployments |
| IEC 61000-4-5 Compliance (42 Ω, 12 Ω, 2 Ω) | Supports Class 1–5 secondary lightning protection across diverse impedance-matched systems |
| Moisture Sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B - simplifies SMT assembly and reduces handling cost |
Applications
| Aircraft Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC power inputs of flight control computers and navigation radios from lightning-induced surges per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary clamping TVS placed directly at connector entry point to shunt >15 kA transients before reaching DC/DC converters and FPGAs. Use Value: Enables compliance with Level 4 pin injection (Waveform 4) and eliminates need for external heatsinking due to RθJC = 0.7 °C/W. | Use Scenario: Safeguarding 12 V supply rails in engine control modules exposed to ISO 7637-2 load dump events (up to 120 V, 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS mounted between battery rail and ECU input filter, clamping within 100 ps to prevent MCU brownout or latch-up. Use Value: Withstands 18 kW pulses without degradation, verified by 100% surge testing per lot - ensures field reliability across 15-year vehicle life. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: Protecting 48–72 V DC bus inputs in variable-frequency drives from switching transients and induced RFI during IGBT commutation. IC Role / Device Role / Timing Role: High-power TVS placed across bus terminals to clamp voltage spikes exceeding 1.5× nominal bus voltage. Use Value: 27.6 V clamping at 653 A prevents gate driver IC failure while maintaining <10 μA leakage to avoid standby current drift. | Use Scenario: Hardening 24 V signaling lines in trackside interlocking systems against EFT bursts (IEC 61000-4-4) and indirect lightning coupling (IEC 61000-4-5). IC Role / Device Role / Timing Role: Bidirectional-capable variant (e.g., MAPLAD18KP17CA) used on differential RS-485 lines; MAPLAD18KP17AE3 used on single-ended power feeds. Use Value: Meets Class 3/4 requirements at 42 Ω source impedance - validated for EN 50121-3-2 railway EMC compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17A | 600 W PPP rating, SMB package, RθJC ≈ 15 °C/W - lower surge capacity and higher thermal resistance | Targeted at consumer-grade industrial controls; not qualified to AEC-Q101 or DO-160 | Select when cost sensitivity outweighs multi-stroke lightning robustness and automotive/aerospace qualification is unnecessary |
| SMCJ17A | 1500 W PPP rating, SMC package, RθJC ≈ 3.5 °C/W - 12× lower peak power than MAPLAD18KP17AE3 | Suitable for basic IEC 61000-4-5 Class 2/3 protection; lacks DO-160F Level 4 validation | Choose only for non-safety-critical 12 V systems where surge energy rarely exceeds 500 W and thermal budget permits larger heatsinking |
Compared with SMBJ17A and SMCJ17A, MAPLAD18KP17AE3 provides 30× and 12× higher peak pulse power respectively, with certified AEC-Q101 and DO-160F compliance - making it the sole option for aerospace-grade lightning hardening and automotive load dump protection where single-event survivability and multi-stroke endurance are mandatory.
Availability
MAPLAD18KP17AE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU power protection, and industrial motor drive DC bus applications requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD18KP17AE3 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing solutions for aerospace, defense, and industrial markets.
The PLAD family - including MAPLAD18KP17AE3 - was engineered specifically for high-energy transient suppression in safety-critical platforms where standard TVS diodes fail under multi-stroke lightning or sustained load dump conditions.
FAQ
What is the clamping voltage of MAPLAD18KP17AE3 at its rated peak pulse current?
MAPLAD18KP17AE3 has a maximum clamping voltage (VC) of 27.6 V at its rated peak pulse current (IPP) of 653 A under 10/1000 μs waveform conditions. This value is guaranteed per datasheet Figure 3 and ensures protected circuits remain below 30 V during worst-case surge events - critical for safeguarding 3.3 V or 5 V logic interfaces downstream of the TVS.
Is MAPLAD18KP17AE3 qualified for automotive applications?
Yes, MAPLAD18KP17AE3 is fully qualified to AEC-Q101 for automotive use. It undergoes stress testing including temperature cycling, humidity bias, and mechanical shock per the standard. Its 17 V VWM and 27.6 V clamping align with 12 V battery system requirements, and its 18,000 W PPP rating exceeds ISO 7637-2 load dump test severity - making MAPLAD18KP17AE3 suitable for engine control units and ADAS power supplies.
Does MAPLAD18KP17AE3 require a heatsink in typical applications?
MAPLAD18KP17AE3 does not require an external heatsink for single-pulse surge events due to its ultra-low junction-to-case thermal resistance of 0.7 °C/W and metal-base thermal design. However, for repetitive surge duty (e.g., >0.05% duty factor), direct mounting to a ≥25 cm² internal copper pour or external heatsink is recommended to maintain TJ < 150°C - confirmed by derating curve in Figure 3 of RF01215 Rev B.
How does MAPLAD18KP17AE3 differ from bidirectional variants like MAPLAD18KP17CA?
MAPLAD18KP17AE3 is unidirectional with cathode on the metal base, optimized for DC power line protection. MAPLAD18KP17CA is bidirectional and symmetric - used for AC lines or data buses where polarity reversal occurs. Both share identical PPP (18,000 W), VWM (17 V), and thermal specs, but MAPLAD18KP17AE3 offers lower leakage (<10 μA) and faster response (<100 ps) in forward-biased operation - key for 12 V automotive rail protection.
Can MAPLAD18KP17AE3 be used for IEC 61000-4-5 compliance testing?
Yes, MAPLAD18KP17AE3 is explicitly validated for IEC 61000-4-5 secondary lightning protection at 42 Ω, 12 Ω, and 2 Ω source impedances - supporting Class 1 through Class 5 depending on impedance. Its 27.6 V clamping at 653 A ensures protected equipment meets immunity thresholds without additional series impedance, and its DO-160F Level 4 certification confirms robustness against fast-rising transients encountered in real-world installations.
MAPLAD18KP17AE3 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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 653A
- 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
MAPLAD18KP17AE3 FAQ
1.How can I place an order for MAPLAD18KP17AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP17AE3 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 MAPLAD18KP17AE3 reliable?
The price and inventory of MAPLAD18KP17AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP17AE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP17AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP17AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP17AE3?
MAPLAD18KP17AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP17AE3 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 MAPLAD18KP17AE3?
For technical support, including MAPLAD18KP17AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP17AE3 requirements.
6.How does Aetrix verify that MAPLAD18KP17AE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP17AE3 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 MAPLAD18KP17AE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP17AE3?
All MAPLAD18KP17AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP17AE3, 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 MAPLAD18KP17AE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP17AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP17AE3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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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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Diodes Incorporated
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