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Microchip Technology MAPLAD36KP28CA
- Part No.:
- MAPLAD36KP28CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP28CA.pdf
- Description:
- TVS DIODE 28VWM 46.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,527
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Product details
Overview
MAPLAD36KP28CA 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 28 V reverse standoff voltage (VWM), clamps to ≤46.4 V at 776 A peak pulse current, and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MAPLAD36KP28CA datasheet, MAPLAD36KP28CA pinout, MAPLAD36KP28CA application, or MAPLAD36KP28CA 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/-4-4.
Technical Context
This TVS diode operates as a voltage-clamping protector with symmetrical bidirectional breakdown behavior, enabling suppression of both positive and negative transients without polarity sensitivity. Its low thermal resistance (RθJC = 1.0 °C/W) and void-free UL94V-0 epoxy package support reliable operation under repeated surge stress.
It is characterized by tight V(BR) tolerance (31.1–34.4 V), low standby current (≤10 μA at 28 V), and fast response time (<5 ns), making it suitable for protecting sensitive avionics interfaces and power rails subject to load dump and induced RFI.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 36,000 W @ 10/1000 μs - sustains aircraft-level lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 28 V - maximum continuous operating voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 31.1–34.4 V @ 5 mA - defines precise conduction threshold for bidirectional clamping |
| Max Clamping Voltage (VC) | 46.4 V @ 776 A - limits protected circuit voltage during worst-case surge |
| Standby Current (ID) | ≤10 μA @ 28 V - ensures negligible leakage in standby power domains |
| Thermal Resistance (RθJC) | 1.0 °C/W - enables efficient heat transfer to PCB copper or heatsink |
| Response Time | <5 ns - reacts faster than most system-level transients propagate |
Pinout & Package
MAPLAD36KP28CA uses a PLAD surface-mount package with two terminals: anode and cathode formed on opposite sides of the metal base. The cathode is the metal base underside; polarity marking applies only to unidirectional variants - bidirectional devices like MAPLAD36KP28CA have no polarity marking and function identically in either orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (positive or negative half-cycle) | Connected to line/rail requiring protection; accepts bidirectional surge current |
| Cathode | Transient current return path (metal base) | Must be soldered to large copper area or heatsink for thermal management and low-inductance grounding |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping architecture | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 36 kW peak pulse rating | Meets RTCA DO-160 Section 22 Level 5 multi-stroke lightning testing for commercial aircraft |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for SMT assembly |
| AEC-Q101 qualified | Validated for automotive under-hood and powertrain applications requiring robust surge immunity |
| RoHS-compliant (e3 plating) | Supports lead-free reflow profiles up to 260°C and complies with environmental regulations |
Applications
| Aerospace Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC power inputs to flight control computers against lightning-induced surges per RTCA DO-160F Section 22. IC Role / Device Role / Timing Role: Primary secondary surge protector placed upstream of DC-DC converters and LDOs. Use Value: Limits transient voltage to ≤46.4 V during 776 A surges, preventing latch-up or damage to downstream ASICs and microcontrollers. | Use Scenario: Safeguarding 12 V/24 V power rails in engine control modules exposed to load dump events per ISO 7637-2. IC Role / Device Role / Timing Role: High-power clamping element mounted directly at connector entry point. Use Value: Absorbs up to 36 kW energy without degradation, maintaining system uptime during repeated 12 V battery disconnect events. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: Suppressing switching transients and induced RFI on 24–48 V DC bus lines feeding servo drives in factory automation. IC Role / Device Role / Timing Role: Fast-response shunt protector parallel to bus capacitance. Use Value: Clamps sub-5 ns transients before they couple into gate drivers or position feedback circuits. | Use Scenario: Providing IEC 61000-4-5 Class 4 immunity (42 Ω source) on 28 V signaling lines between trackside controllers and interlocking systems. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube primary arresters. Use Value: Delivers precise 46.4 V clamping to preserve signal integrity of RS-485 and CAN physical layers during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA | 600 W PPP rating, same VWM and bidirectional construction but lower surge capacity | Limited to industrial-grade single-stroke surges; not certified for RTCA DO-160F Level 5 | Select when cost and board space constrain use of 36 kW devices and surge severity is moderate |
| SMCJ28CA | 1500 W PPP rating, identical package footprint but lower thermal performance (RθJC ≈ 2.5 °C/W) | Suitable for automotive and telecom applications meeting IEC 61000-4-5 Class 3, not Class 4/5 | Choose where AEC-Q101 qualification is required but full DO-160F compliance is unnecessary |
Compared with SMBJ28CA and SMCJ28CA, MAPLAD36KP28CA provides 60× and 24× higher peak pulse power respectively, enabling certified multi-stroke lightning protection in safety-critical aerospace platforms where single-event robustness is insufficient.
Availability
MAPLAD36KP28CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain electronics, and industrial motor drive systems requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD36KP28CA 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) designs high-reliability semiconductor solutions for aerospace, defense, and industrial markets, with emphasis on radiation-hardened, high-power, and precision timing devices.
The MAPLAD36KP28CA belongs to the PLAD family of high-power surface-mount TVS diodes engineered specifically for certified lightning and load dump protection in mission-critical platforms where multi-stroke survivability and thermal stability are mandatory.
FAQ
What is the clamping voltage of MAPLAD36KP28CA at its rated peak pulse current?
The MAPLAD36KP28CA has a maximum clamping voltage (VC) of 46.4 V at 776 A peak pulse current under 10/1000 μs waveform conditions. This value is guaranteed across temperature and lot variations per the datasheet's electrical characteristics table and ensures protected circuits remain below critical overvoltage thresholds during surge events.
Is MAPLAD36KP28CA certified for RTCA DO-160F lightning testing?
Yes, MAPLAD36KP28CA is validated for RTCA DO-160F Section 22 multi-stroke lightning testing up to Level 5 for Waveform 4 (6.4/69 μs) and Level 4 for Waveform 5A (40/120 μs). Its 36 kW rating and low clamping voltage enable compliance when mounted per recommended pad layout on FR4 with thermal relief.
Does MAPLAD36KP28CA require a heatsink for standard operation?
MAPLAD36KP28CA does not require an external heatsink for single-pulse surge events, but its metal base must be soldered to ≥1 in² of 2-oz copper for thermal management during repetitive surges. The 1.0 °C/W junction-to-case thermal resistance relies on direct conduction to PCB copper - isolated pads or thin traces will cause thermal runaway.
How does the bidirectional construction of MAPLAD36KP28CA affect circuit layout?
The bidirectional construction of MAPLAD36KP28CA eliminates polarity sensitivity, allowing placement without orientation constraints. Unlike unidirectional TVS diodes, MAPLAD36KP28CA has no cathode marking and functions identically regardless of terminal connection - simplifying layout and reducing assembly errors in AC or floating rail protection schemes.
What is the moisture sensitivity level (MSL) rating for MAPLAD36KP28CA?
MAPLAD36KP28CA is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and requires no dry-packaging or baking prior to reflow soldering. This simplifies manufacturing logistics and supports standard lead-free reflow profiles up to 260°C for 10 seconds.
MAPLAD36KP28CA 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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 46.4V
- Current - Peak Pulse (10/1000µs):
- 776A
- 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
MAPLAD36KP28CA FAQ
1.How can I place an order for MAPLAD36KP28CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP28CA 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 MAPLAD36KP28CA reliable?
The price and inventory of MAPLAD36KP28CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP28CA is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP28CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP28CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP28CA?
MAPLAD36KP28CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP28CA 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 MAPLAD36KP28CA?
For technical support, including MAPLAD36KP28CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP28CA requirements.
6.How does Aetrix verify that MAPLAD36KP28CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP28CA 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 MAPLAD36KP28CA meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP28CA?
All MAPLAD36KP28CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP28CA, 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 MAPLAD36KP28CA part is unused and in its original packaging.
Return procedure for MAPLAD36KP28CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP28CA Tags
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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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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