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Microchip Technology MAPLAD36KP18CA
- Part No.:
- MAPLAD36KP18CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP18CA.pdf
- Description:
- TVS DIODE 18VWM 30.8VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:3,917
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Product details
Overview
MAPLAD36KP18CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36 kW peak pulse power at 10/1000 μs, features a 18 V reverse standoff voltage (VWM), clamps to ≤30.8 V at 1169 A peak pulse current, and meets RTCA DO-160 Section 22 multi-stroke lightning requirements for aircraft electronics.
For engineers reviewing the MAPLAD36KP18CA datasheet, MAPLAD36KP18CA pinout, MAPLAD36KP18CA application, or MAPLAD36KP18CA 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 immunity per RTCA/DO-160F Waveforms 4 and 5A, and ESD/EFT compliance per IEC 61000-4-2 and -4-4.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device during transients, with bidirectional symmetry enabling protection against both polarities of surge events. Its low thermal resistance (RθJC = 1.0 °C/W) and void-free UL94V-0 epoxy package support sustained multi-pulse operation under RTCA DO-160 test conditions.
It is characterized by a breakdown voltage range of 20.0–22.1 V at 5 mA, maximum clamping voltage of 30.8 V at 1169 A, and standby leakage current ≤60 μA at 18 V - all specified at 25°C and validated per AEC-Q101 reliability testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - enables single-device handling of Class 5 lightning surges per DO-160F without parallel staging |
| Reverse Standoff Voltage (VWM) | 18 V - matches nominal 12 V automotive and avionics bus systems with margin for ripple and tolerance |
| Clamping Voltage (VC) | ≤30.8 V @ IPP = 1169 A - ensures downstream ICs rated to 33 V remain within safe operating area during surge |
| Breakdown Voltage (V(BR)) | 20.0–22.1 V @ 5 mA - defines precise turn-on threshold for predictable clamping onset |
| Thermal Resistance (RθJC) | 1.0 °C/W - allows direct mounting to heatsink for >1000-cycle multi-stroke endurance without derating |
| Leakage Current (ID) | ≤60 μA @ 18 V - minimizes quiescent power loss in always-on avionics monitoring circuits |
| Surge Standards | IEC 61000-4-2/4-4/4-5, RTCA DO-160F Sections 22 & 25 - certified for full qualification-level system testing |
Pinout & Package
MAPLAD36KP18CA uses a surface-mount PLAD package (void-free thermosetting epoxy, UL94V-0) with metal base cathode contact on underside. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H). Polarity marking applies only to unidirectional variants; bidirectional CA devices have symmetric terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Surface Pad) | Transient current entry point (positive polarity) | Connects to protected line; forms one side of symmetrical clamping path |
| Cathode (Metal Base) | Transient current return path (negative polarity) | Soldered directly to PCB ground plane or heatsink; provides lowest-inductance return path |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 1.0 °C/W junction-to-case thermal resistance | Supports ≥1000 surge cycles at full 36 kW without thermal runaway when mounted per recommended pad layout |
| RTCA DO-160F Section 22 compliance | Validated for multi-stroke lightning testing up to Level 5 - eliminates need for external test waivers |
| Moisture sensitivity Level 1 | Allows standard SMT reflow without dry-pack or baking, reducing manufacturing overhead |
| AEC-Q101 qualified | Meets automotive-grade reliability requirements including HTOL, temperature cycling, and surge robustness |
Applications
| Avionics Power Bus Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: Protecting 28 V DC distribution buses in commercial aircraft against induced lightning currents per DO-160F Section 22. IC Role / Device Role / Timing Role: Primary clamping element placed at bus entry point to limit transient overvoltage before it reaches flight control modules. Use Value: Clamps to ≤30.8 V during 1169 A surges, preserving integrity of 33 V-rated power management ICs and microcontrollers. | Use Scenario: Safeguarding infotainment ECUs during alternator load dump events in 12 V vehicle architectures. IC Role / Device Role / Timing Role: Fast-response shunt device absorbing up to 36 kW energy within microseconds to prevent latch-up or gate oxide rupture. Use Value: Withstands repeated 12 V system surges up to 120 V peak while maintaining <60 μA leakage at nominal voltage. |
| Industrial Motor Drive I/O Protection | Railway Signaling Interface Protection |
Use Scenario: Shielding encoder and analog feedback inputs on servo drives from switching transients generated by IGBT inverters. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pairs to clamp common-mode surges without distorting signal integrity. Use Value: Symmetric clamping ensures equal protection for both signal polarities, eliminating need for dual unidirectional devices. | Use Scenario: Securing 70 V DC trackside signaling interfaces against induced surges from nearby traction currents and lightning coupling. IC Role / Device Role / Timing Role: Secondary protector downstream of gas discharge tubes, handling residual energy after primary diversion. Use Value: Validated for IEC 61000-4-5 Class 4 (42 Ω source) up to 260 V standoff - matches EN 50121-4 railway EMC requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18CA | 600 W PPP rating, 10× lower energy handling; SMC package, higher RθJA (40 °C/W) | Restricted to low-energy ESD/EFT; unsuitable for DO-160F Level 4+ or load dump | Select only for cost-sensitive consumer-grade designs where 36 kW capability is unnecessary |
| SMCJ18CA | 1500 W PPP, same SMC package; clamps at 29.2 V @ 51.7 A - insufficient for multi-kA surges | Limited to IEC 61000-4-5 Class 2; cannot meet DO-160F Section 22 multi-stroke requirements | Use where space constraints prohibit PLAD footprint but full 36 kW performance is not required |
Compared with SMBJ18CA and SMCJ18CA, MAPLAD36KP18CA delivers 24× and 24× higher peak pulse power respectively, enabling single-device compliance with aviation lightning standards and automotive load dump tests - critical for safety-critical systems where cascaded protection adds failure modes and board area.
Availability
MAPLAD36KP18CA is available at Aetrix Electronics and suitable for avionics power bus protection, automotive load dump suppression, and industrial motor drive I/O protection requiring stable component supply across extended production lifecycles.
Supply support for MAPLAD36KP18CA 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 MAPLAD36KP18CA belongs to Microsemi's high-power PLAD TVS family, engineered specifically for multi-stroke lightning and load dump protection in safety-critical platforms where failure is not an option.
FAQ
What is the clamping voltage of MAPLAD36KP18CA at its rated peak pulse current?
The MAPLAD36KP18CA has a maximum clamping voltage (VC) of 30.8 V at its peak pulse current (IPP) of 1169 A under 10/1000 μs waveform conditions. This value is measured per JEDEC standards and guarantees that protected circuitry remains below 33 V during worst-case surge events - a key design margin for 3.3 V and 5 V logic interfaces downstream of the MAPLAD36KP18CA.
Does MAPLAD36KP18CA meet AEC-Q101 qualification requirements?
Yes, MAPLAD36KP18CA is tested and qualified to AEC-Q101 standards, including high-temperature operating life (HTOL), temperature cycling, and surge robustness. This qualification confirms its suitability for automotive under-hood and chassis applications where reliability under thermal stress and electrical transients is mandatory - a requirement explicitly verified for the MAPLAD36KP18CA in Microsemi's reliability report RF01216 Rev B.
How does the PLAD package of MAPLAD36KP18CA improve thermal performance compared to SMC or SMB packages?
The PLAD package of MAPLAD36KP18CA achieves a junction-to-case thermal resistance (RθJC) of just 1.0 °C/W - over 40× better than typical SMC packages (~40 °C/W). This is enabled by its metal-base construction and direct thermal path to the PCB ground plane or heatsink, allowing MAPLAD36KP18CA to sustain repeated 36 kW surges without thermal degradation, unlike smaller packages that require derating or parallel staging.
Can MAPLAD36KP18CA be used for RTCA DO-160F Section 25 pin injection testing?
Yes, MAPLAD36KP18CA is rated for RTCA DO-160F Section 25 pin injection protection: Level 4 for Waveform 4 (6.4/69 μs) and Level 4 for Waveform 5A (40/120 μs) up to 18 V standoff. Its bidirectional symmetry and fast response (<5 ns) ensure consistent clamping regardless of injection polarity - a capability confirmed in Microsemi's application note and test data for MAPLAD36KP18CA.
What is the moisture sensitivity level (MSL) of MAPLAD36KP18CA, and how does it affect assembly?
MAPLAD36KP18CA has IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1 - the highest reliability tier - meaning it requires no dry pack, baking, or special handling prior to reflow soldering. This simplifies SMT line integration, eliminates moisture-related popcorning risk, and reduces manufacturing cost - a verified specification documented in the MAPLAD36KP18CA datasheet RF01216 Rev B.
MAPLAD36KP18CA 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):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 30.8V
- Current - Peak Pulse (10/1000µs):
- 1169A (1.169kA)
- Power - Peak Pulse:
- 36000W (36kW)
- 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
MAPLAD36KP18CA FAQ
1.How can I place an order for MAPLAD36KP18CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP18CA 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 MAPLAD36KP18CA reliable?
The price and inventory of MAPLAD36KP18CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP18CA is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP18CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP18CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP18CA?
MAPLAD36KP18CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP18CA 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 MAPLAD36KP18CA?
For technical support, including MAPLAD36KP18CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP18CA requirements.
6.How does Aetrix verify that MAPLAD36KP18CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP18CA 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 MAPLAD36KP18CA meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP18CA?
All MAPLAD36KP18CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP18CA, 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 MAPLAD36KP18CA part is unused and in its original packaging.
Return procedure for MAPLAD36KP18CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP18CA Tags
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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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Diodes Incorporated
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onsemi
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Diodes Incorporated
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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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