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Microchip Technology MAPLAD18KP14CA
- Part No.:
- MAPLAD18KP14CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP14CA.pdf
- Description:
- TVS DIODE 14VWM 23.2VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,834
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Product details
Overview
MAPLAD18KP14CA from Microsemi is a bidirectional 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 a 14 V reverse standoff voltage (VWM), clamps to ≤23.2 V at 776 A peak impulse current (IPP), and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MAPLAD18KP14CA datasheet, MAPLAD18KP14CA pinout, MAPLAD18KP14CA application, or MAPLAD18KP14CA equivalent, this device is selected for secondary lightning protection per IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances), pin injection protection per RTCA/DO-160F Waveform 4 (Level 4), and ESD/EFT immunity per IEC 61000-4-2/-4.
Technical Context
The MAPLAD18KP14CA operates as a bidirectional avalanche diode-based TVS, with symmetrical clamping behavior across both polarities. Its low thermal resistance (RθJC = 0.7 °C/W) enables efficient heat transfer to the PCB copper pad or heatsink, supporting repeated surge events under ≤0.05% duty factor conditions.
It is rated for junction temperatures from –55 °C to +150 °C and exhibits a breakdown voltage range of 15.6–17.2 V at I(BR), with a temperature coefficient of 13 mV/°C. The device passes AEC-Q101 qualification and supports MIL-PRF-19500 upscreening options.
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) | 14 V - maximum continuous operating voltage before conduction begins |
| Clamping Voltage (VC) | ≤23.2 V @ IPP = 776 A - limits downstream circuit voltage during surge |
| Breakdown Voltage (V(BR)) | 15.6–17.2 V @ I(BR) - defines onset of avalanche conduction |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables direct thermal path to PCB copper or heatsink |
| Steady-State Power Dissipation | 2.5 W @ TA = 25°C - supports low-duty-cycle biasing without derating |
| Temperature Coefficient (αV(BR)) | 13 mV/°C - quantifies V(BR) drift over operating temperature range |
Pinout & Package
MAPLAD18KP14CA uses a surface-mount plastic package with metal base cathode termination. The device has two terminals: anode and cathode, with polarity marked on the body; for bidirectional operation, both terminals behave symmetrically under reverse/forward surge conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry point (positive polarity) | Connects to protected line; conducts during positive transients |
| Cathode | Surge current return path (metal base) | Mounted directly to PCB copper pour or heatsink for thermal and electrical return |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC or differential signal lines without polarity concerns |
| Low RθJC (0.7 °C/W) | Reduces thermal stress during repetitive surges, extending lifetime in avionics power rails |
| RTCA DO-160F Waveform 4 compliance (Level 4) | Validated for 6.4/69 μs pin-injection transients at 25 °C - critical for flight-critical avionics |
| IEC 61000-4-5 secondary lightning protection | Qualified at Class 1–5 (42 Ω), Class 1–4 (12 Ω), and Class 2–3 (2 Ω) - covers full aircraft system impedance spectrum |
| AEC-Q101 qualified | Meets automotive-grade reliability for engine control, battery management, and ADAS power inputs |
Applications
| Avionics Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: Protecting 28 V DC bus in commercial aircraft flight control computers from induced lightning currents. IC Role / Device Role / Timing Role: Primary secondary surge clamp on main power input, placed upstream of DC/DC converters. Use Value: Limits transient voltage to ≤23.2 V during DO-160 Section 22 multi-stroke events, preventing latch-up in downstream ASICs. | Use Scenario: Safeguarding 12 V/24 V automotive ECUs against alternator load dump spikes up to 120 V. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector interface to absorb both positive and negative polarity transients. Use Value: Clamps 776 A surges within nanoseconds while maintaining <10 μA standby leakage at 14 V nominal rail. |
| Industrial Motor Drive Inputs | Railway Signaling Interface |
Use Scenario: Shielding variable-frequency drive (VFD) control board inputs from switching-induced RFI and inductive kickback. IC Role / Device Role / Timing Role: Transient suppressor on analog sensor supply lines and digital I/O ports. Use Value: Suppresses EFT bursts per IEC 61000-4-4 (4 kV contact discharge) without degrading 14 V reference stability. | Use Scenario: Protecting track-side signaling equipment powered from 72 V DC traction supply against lightning-induced ground potential rise. IC Role / Device Role / Timing Role: Bidirectional clamp on isolated power and data lines interfacing with field sensors. Use Value: Meets EN 50121-4 immunity requirements via IEC 61000-4-5 testing at 42 Ω source impedance (Class 3). |
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 SMAJ14CA | 600 W PPP rating, 5.0 mm × 7.0 mm SMA package, RθJA ≈ 50 °C/W | Not qualified for RTCA DO-160 or MIL-PRF-19500; limited to industrial/commercial use | Select when cost-sensitive, non-aerospace designs require basic 14 V bidirectional clamping |
| Vishay V18MLA1403 | 18 kW multilayer varistor (MLV), 12.7 mm × 10.2 mm footprint, no AEC-Q101 or DO-160 validation | Higher capacitance (~200 pF) limits use in high-speed data lines; unsuitable for pin-injection testing | Prefer for space-constrained PCBs where MLV form factor is acceptable and aviation compliance is not required |
Compared with SMAJ14CA and V18MLA1403, MAPLAD18KP14CA provides 30× higher peak power handling, certified aerospace qualification, and validated pin-injection immunity-making it irreplaceable in flight-critical power interfaces where thermal robustness and regulatory traceability are mandatory.
Availability
MAPLAD18KP14CA is available at Aetrix Electronics and suitable for avionics power distribution, automotive load dump protection, and industrial motor drive inputs requiring stable component supply across extended production lifecycles.
Supply support for MAPLAD18KP14CA 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, mixed-signal, and radiation-tolerant ICs for aerospace, defense, and industrial markets.
The MAPLAD18KP14CA belongs to Microsemi's PLAD family of high-power surface-mount TVS diodes, engineered specifically for multi-stroke lightning survivability and DO-160-compliant avionics protection.
FAQ
What is the clamping voltage of MAPLAD18KP14CA at its rated peak impulse current?
The MAPLAD18KP14CA has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak impulse current (IPP) of 776 A under 10/1000 μs waveform conditions. This value is guaranteed per the datasheet's Electrical Characteristics table and ensures downstream circuitry remains below safe voltage thresholds during surge events. The MAPLAD18KP14CA achieves this clamping performance while maintaining low thermal resistance for repeatable operation.
Is MAPLAD18KP14CA qualified for automotive applications?
Yes, MAPLAD18KP14CA is AEC-Q101 qualified, confirming its reliability for automotive use cases including engine control units, battery management systems, and ADAS power inputs. It withstands temperature cycling, mechanical shock, and humidity exposure per the standard. The MAPLAD18KP14CA also supports optional MIL-PRF-19500 screening for enhanced lot traceability and burn-in, making it suitable for safety-critical vehicle subsystems.
Does MAPLAD18KP14CA meet RTCA DO-160 lightning test requirements?
Yes, MAPLAD18KP14CA is explicitly validated for RTCA DO-160 Section 22 multi-stroke lightning testing and pin injection per Waveform 4 (6.4/69 μs) at Level 4. Its 18,000 W peak pulse power rating and low RθJC enable sustained performance across multiple strokes without degradation. The MAPLAD18KP14CA is listed in the RF01215 datasheet as compliant for these tests, confirming suitability for commercial and military aircraft power systems.
What is the thermal resistance from junction to case for MAPLAD18KP14CA?
The junction-to-case thermal resistance (RθJC) of MAPLAD18KP14CA is 0.7 °C/W, measured under specified mounting conditions on FR4 with recommended pad layout. This low value enables efficient heat transfer from the silicon die to the PCB copper pour or external heatsink, critical for managing cumulative heating during repetitive surges. The MAPLAD18KP14CA leverages its metal-base construction to achieve this performance, distinguishing it from standard SMD TVS diodes.
How does the bidirectional construction of MAPLAD18KP14CA affect its circuit implementation?
The bidirectional construction of MAPLAD18KP14CA allows it to protect AC-coupled or differential signal paths without polarity sensitivity-both terminals conduct symmetrically during positive or negative transients. This eliminates the need for dual unidirectional devices or polarity-aware layout. In practice, MAPLAD18KP14CA is mounted directly across the protected line and ground (or between differential pairs), simplifying design and reducing BOM count while maintaining full surge immunity in either direction.
MAPLAD18KP14CA 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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 776A
- 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
MAPLAD18KP14CA FAQ
1.How can I place an order for MAPLAD18KP14CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP14CA 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 MAPLAD18KP14CA reliable?
The price and inventory of MAPLAD18KP14CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP14CA is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP14CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP14CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP14CA?
MAPLAD18KP14CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP14CA 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 MAPLAD18KP14CA?
For technical support, including MAPLAD18KP14CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP14CA requirements.
6.How does Aetrix verify that MAPLAD18KP14CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP14CA 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 MAPLAD18KP14CA meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP14CA?
All MAPLAD18KP14CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP14CA, 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 MAPLAD18KP14CA part is unused and in its original packaging.
Return procedure for MAPLAD18KP14CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP14CA Tags
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onsemi
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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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Toshiba Semiconductor and Storage
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