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Microchip Technology MAPLAD18KP30CAE3
- Part No.:
- MAPLAD18KP30CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP30CAE3.pdf
- Description:
- TVS DIODE 30VWM 48.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:8,456
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Product details
Overview
MAPLAD18KP30CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps at ≤48.4 V under 372 A peak impulse current, and features a 30 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (33.3–36.8 V). It meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection requirements.
For engineers reviewing the MAPLAD18KP30CAE3 datasheet, MAPLAD18KP30CAE3 pinout, MAPLAD18KP30CAE3 application, or MAPLAD18KP30CAE3 equivalent, key selection criteria include bidirectional clamping capability, low thermal resistance (RθJC = 0.7 °C/W), RoHS-compliant e3 plating, 10 μA max standby current at VWM, and compatibility with FR4 PCB mounting per defined pad layout.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device triggered by overvoltage transients, using avalanche breakdown to shunt energy away from protected circuitry. Its bidirectional construction enables symmetrical clamping for AC-coupled or floating signal lines, and its metal-base cathode configuration supports direct thermal coupling to heatsinks.
The device is characterized for multi-stroke lightning compliance (RTCA DO-160 Section 22), with validated performance across 2 Ω, 12 Ω, and 42 Ω source impedances per IEC 61000-4-5. It undergoes 100% surge testing and 3σ lot norm screening on standby current (ID), ensuring reliability in safety-critical avionics and vehicle electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 30 V - maximum continuous operating voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 33.3–36.8 V @ I(BR) - defines precise conduction threshold with tight 5% tolerance |
| Max Clamping Voltage (VC) | 48.4 V @ 372 A - limits downstream voltage stress during worst-case surge |
| Standby Current (ID) | 10 μA @ 30 V - negligible leakage ensures no signal integrity impact in standby |
| Thermal Resistance (RθJC) | 0.7 °C/W - enables efficient heat transfer to heatsink or copper pour |
| Junction Temp Range | −55 °C to +150 °C - supports operation in extreme environmental conditions |
Pinout & Package
MAPLAD18KP30CAE3 uses a surface-mount plastic package with metal base (cathode terminal), void-free UL94V-0 epoxy body, and matte-tin (e3) RoHS-compliant plating. The device has two terminals: anode and cathode, with cathode located on the metal base underside.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive surge path input | Connects to line being protected; conducts during positive transients in bidirectional mode |
| Cathode (metal base) | Common reference / heat sink interface | Serves as return path for both polarities; provides low-thermal-resistance path to PCB copper or external heatsink |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses, or floating nodes without polarity constraints |
| 18 kW surge rating | Meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 4/5 lightning standards |
| Metal-base thermal design | RθJC = 0.7 °C/W allows direct mounting to heatsink or large copper area for sustained multi-pulse operation |
| RoHS-compliant e3 plating | Tin-lead alternative eliminated; fully compatible with lead-free reflow processes (260 °C, 10 s) |
| 100% surge tested | Each unit verified to withstand rated 10/1000 μs pulse - no sampling-based qualification |
Applications
| Aircraft Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC power inputs in flight control computers against induced lightning transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary transient suppression element placed upstream of DC-DC converters and LDOs. Use Value: Limits clamped voltage to 48.4 V, preventing damage to 36 V-rated input stages while sustaining multi-stroke events. | Use Scenario: Safeguarding ECU 12 V supply rails from load dump spikes up to 120 V and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS absorbing both positive and negative transients on shared sensor/power lines. Use Value: 30 V VWM matches nominal battery voltage; 48.4 V clamping prevents latch-up in microcontroller power domains. |
| Industrial Motor Drive Gate Driver Supply | Railway Signaling Interface |
Use Scenario: Shielding isolated gate driver bias supplies from switching-induced dv/dt transients and ground bounce. IC Role / Device Role / Timing Role: Low-inductance clamp across isolated DC/DC output, minimizing voltage overshoot during MOSFET turn-off. Use Value: Sub-100 ps response time ensures clamping activation before sensitive gate oxide breakdown occurs. | Use Scenario: Protecting 48 V signaling interfaces in track-side equipment from EFT bursts and surge coupling via long cable runs. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), handling residual fast-rising energy. Use Value: 10 μA ID ensures no loading on high-impedance RS-485 receivers; 48.4 V VC aligns with 50 V system margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ33CA | 600 W PPP rating, SMA package, RθJA = 40 °C/W, VWM = 33 V, VC = 53.3 V @ 11.8 A | Lower energy handling; suitable only for single-stroke, non-aviation-grade surges | Select when cost sensitivity outweighs multi-stroke reliability and thermal performance requirements |
| Vishay VMM18K33CA | 18 kW PPP, TO-277 package, RθJC = 1.2 °C/W, VWM = 33 V, VC = 49.9 V @ 360 A | Higher thermal resistance reduces sustained pulse capability; lacks DO-160F validation | Choose if board space permits larger footprint and DO-160 compliance is not required |
Compared with SMAJ33CA and VMM18K33CA, MAPLAD18KP30CAE3 offers superior thermal management (RθJC = 0.7 °C/W), certified DO-160F Waveform 4 Level 4 compliance, and tighter V(BR) tolerance - critical for deterministic clamping in safety-critical power inputs.
Availability
MAPLAD18KP30CAE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU power protection, and industrial motor drive designs requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MAPLAD18KP30CAE3 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, timing, and radiation-hardened solutions for aerospace, defense, and industrial markets.
The MAPLAD family was engineered specifically for multi-stroke lightning protection in airborne platforms, emphasizing thermal robustness, low-inductance packaging, and full DO-160F certification - not general-purpose surge suppression.
FAQ
What is the clamping voltage of MAPLAD18KP30CAE3 at its rated peak pulse current?
MAPLAD18KP30CAE3 has a maximum clamping voltage (VC) of 48.4 V at 372 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is guaranteed across temperature and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events, directly enabling safe interfacing with 36 V-rated downstream components.
Does MAPLAD18KP30CAE3 meet RTCA DO-160F lightning protection requirements?
Yes, MAPLAD18KP30CAE3 is validated for RTCA DO-160F Section 22 Waveform 4 (6.4/69 μs) Level 4 protection at 25 °C. Its bidirectional construction, 18 kW rating, and low thermal resistance enable reliable multi-stroke performance - a requirement explicitly confirmed in Microsemi's RF01215 Rev B documentation for the MPLAD18KP30CA variant.
How is thermal management implemented in MAPLAD18KP30CAE3?
MAPLAD18KP30CAE3 uses a metal-base package where the cathode serves as both electrical terminal and primary thermal path. With RθJC = 0.7 °C/W, it requires mounting to a thermally conductive PCB copper area or external heatsink. The recommended pad layout (per RF01215) specifies minimum copper area and via placement to maintain junction temperature below 150 °C during repetitive surges.
What does the "CA" suffix indicate in MAPLAD18KP30CAE3?
The "CA" suffix in MAPLAD18KP30CAE3 denotes bidirectional construction - meaning the device provides symmetrical clamping for both positive and negative transients. This distinguishes it from unidirectional variants (e.g., MAPLAD18KP30AE3) and is essential for protecting AC-coupled lines, differential buses, or floating references where polarity reversal may occur.
Is MAPLAD18KP30CAE3 RoHS compliant and lead-free assembly compatible?
Yes, the "E3" suffix confirms MAPLAD18KP30CAE3 uses annealed matte-tin plating compliant with RoHS Directive 2011/65/EU. It supports lead-free reflow soldering per J-STD-020B Level 1 (260 °C peak, 10 s), with no dry pack required due to IPC/JEDEC moisture sensitivity level 1 classification.
MAPLAD18KP30CAE3 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 372A
- 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
MAPLAD18KP30CAE3 FAQ
1.How can I place an order for MAPLAD18KP30CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP30CAE3 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 MAPLAD18KP30CAE3 reliable?
The price and inventory of MAPLAD18KP30CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP30CAE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP30CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP30CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP30CAE3?
MAPLAD18KP30CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP30CAE3 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 MAPLAD18KP30CAE3?
For technical support, including MAPLAD18KP30CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP30CAE3 requirements.
6.How does Aetrix verify that MAPLAD18KP30CAE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP30CAE3 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 MAPLAD18KP30CAE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP30CAE3?
All MAPLAD18KP30CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP30CAE3, 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 MAPLAD18KP30CAE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP30CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP30CAE3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
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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