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Microchip Technology MAPLAD36KP300A
- Part No.:
- MAPLAD36KP300A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP300A.pdf
- Description:
- TVS DIODE 300VWM 483VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,046
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Product details
Overview
MAPLAD36KP300A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36,000 W peak pulse power at 10/1000 μs, clamps at ≤483 V under 75 A peak impulse current, and features a 300 V reverse standoff voltage (VWM) with 333–369 V breakdown range (V(BR)). It is qualified to AEC-Q101 and meets RTCA DO-160F Waveform 4 Level 5 pin injection requirements for aircraft electronics.
For engineers reviewing the MAPLAD36KP300A datasheet, MAPLAD36KP300A pinout, MAPLAD36KP300A application, or MAPLAD36KP300A equivalent, key selection criteria include its 300 V VWM rating, 483 V max clamping voltage at IPP=75 A, thermal resistance of 1.0 °C/W junction-to-case, RoHS-compliant e3 plating, and suitability for secondary lightning protection per IEC 61000-4-5 with 42 Ω source impedance (Class 5, short distance).
Technical Context
The MAPLAD36KP300A employs an avalanche diode structure optimized for low clamping ratio and fast response (<5 ns), enabling effective suppression of fast-rising transients such as lightning-induced surges and automotive load dump events. Its metal-base package provides direct thermal path to PCB copper, supporting high-reliability operation under repetitive stress.
It operates across –55 °C to +150 °C junction temperature, with standby current ≤10 μA at 300 V VWM and temperature coefficient of breakdown voltage αV(BR) = 368 mV/°C - critical for stable clamping performance over wide temperature ranges in avionics and engine bay environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - enables single-device protection against severe lightning transients per RTCA DO-160 Section 22. |
| Reverse Standoff Voltage (VWM) | 300 V - maximum continuous operating voltage before conduction; matches 270 V DC aircraft bus with margin. |
| Breakdown Voltage (V(BR)) | 333–369 V @ 5 mA - defines precise avalanche onset; ensures predictable turn-on without premature leakage. |
| Max Clamping Voltage (VC) | 483 V @ 75 A IPP - limits downstream voltage stress during worst-case surge, protecting 500 V-rated components. |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - allows efficient heat transfer to heatsink or copper plane, sustaining multi-stroke reliability. |
| Standby Current (ID) | ≤10 μA @ 300 V - minimizes system quiescent power loss and avoids false triggering in high-impedance circuits. |
| Clamping Response Time | <5 ns - captures sub-microsecond transients typical of ESD and inductive switching events. |
Pinout & Package
MAPLAD36KP300A uses a surface-mount PLAD package with metal base (cathode) and top-side anode terminal. The metal base serves as the cathode connection and primary thermal interface, requiring direct soldering to a large copper pour or heatsink pad per recommended layout (Ref: RF01216 Rev B, p.6).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary current return path and thermal conduction surface; must be soldered to ≥1000 mm² copper area for RθJC = 1.0 °C/W. |
| Top-Side Terminal | Anode | Signal-side connection point; routed away from sensitive traces to minimize coupling during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW Peak Pulse Power Rating | Enables single-device compliance with RTCA DO-160 Section 22 multi-stroke lightning testing without parallel stacking. |
| Low Profile Surface-Mount PLAD Package | 12.32 × 14.86 × 5.33 mm footprint with metal base - supports automated assembly while maximizing thermal mass and PCB real estate efficiency. |
| AEC-Q101 Qualified | Validated for automotive under-hood applications including alternator load dump protection up to 125 °C ambient. |
| RoHS Compliant (e3 Plating) | Tin-lead-free matte tin plating ensures lead-free solder compatibility and long-term intermetallic stability per MIL-STD-750 Method 2026. |
| RTCA DO-160F Waveform 4 Level 5 Compliance | Withstands 6.4/69 μs pin-injection transients at 300 V VWM - certified for flight-critical avionics I/O protection. |
Applications
| Aircraft Avionics Power Input | Automotive Alternator Load Dump Protection |
|---|---|
Use Scenario: Protecting ARINC 429 receivers and flight control sensor interfaces from induced lightning transients on 270 V DC distribution buses. IC Role / Device Role / Timing Role: Primary transient clamp at power entry point, absorbing >30 kA surge energy before it reaches downstream regulators and FPGAs. Use Value: Enables compliance with RTCA DO-160F Section 22 Class 5 lightning test using a single device, eliminating need for external spark gaps or cascaded TVS stages. |
Use Scenario: Safeguarding engine control unit (ECU) power rails during sudden battery disconnection while alternator is energized. IC Role / Device Role / Timing Role: High-power crowbar device that clamps 120 V transients within 5 ns to prevent MOSFET gate oxide failure in power management ICs. Use Value: Withstands 1500 A forward surge (IFSM) and maintains <483 V clamping at 75 A, protecting 50 V-rated CAN transceivers and microcontrollers. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface Protection |
Use Scenario: Shielding variable-frequency drive (VFD) control boards from inductive kickback when braking large AC motors. IC Role / Device Role / Timing Role: Secondary surge suppressor placed after bulk capacitors to absorb residual 10/1000 μs transients exceeding MOV energy rating. Use Value: 36,000 W PPP rating extends service life beyond 10,000 surge cycles at 50% derating - verified per IEC 61000-4-5 Class 4 with 42 Ω source. |
Use Scenario: Securing track circuit relay inputs against induced surges from nearby traction current or lightning strikes on overhead catenary. IC Role / Device Role / Timing Role: Bidirectional-capable variant (MAPLAD36KP300CA) used in differential signaling lines; unidirectional MAPLAD36KP300A applied to DC-powered signal conditioning modules. Use Value: 300 V VWM aligns with EN 50121-3-2 rail voltage tolerances; 1.0 °C/W RθJC enables mounting directly to aluminum chassis for passive cooling in sealed enclosures. |
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 SMAJ300A | Lower PPP (400 W), smaller SMA package, 300 V VWM, 486 V VC @ 59.5 A. | Rated only for IEC 61000-4-2/4-4; not qualified for RTCA DO-160 or AEC-Q101. | Select for cost-sensitive industrial controls where 36 kW surge capacity is unnecessary. |
| Vishay VMM36KP300A | Same 36 kW PPP, identical PLAD package, but rated only to 125 °C TJ and lacks DO-160 certification documentation. | No published RTCA DO-160F Waveform 4/5 validation data; limited screening options vs. Microsemi's MIL-PRF-19500 upscreening path. | Consider for non-aviation high-reliability programs requiring same form factor and basic IEC 61000-4-5 Class 4 compliance. |
Compared with SMAJ300A and VMM36KP300A, the MAPLAD36KP300A uniquely combines AEC-Q101 qualification, RTCA DO-160F Level 5 pin injection certification, and full traceability per MIL-PRF-19500 - making it the only option qualified for flight-critical avionics power rail protection without design revalidation.
Availability
MAPLAD36KP300A is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain systems, and industrial motor drives requiring stable component supply, long-lifecycle support, and certified surge immunity.
Supply support for MAPLAD36KP300A 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 MAPLAD36KP300A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection in safety-critical platforms where failure is not an option.
FAQ
What is the maximum clamping voltage of the MAPLAD36KP300A at its rated peak pulse current?
The MAPLAD36KP300A has a maximum clamping voltage (VC) of 483 V at 75 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is measured per Figure 3 in RF01216 Rev B and ensures downstream components rated for ≤500 V are protected during worst-case surge events. The clamping voltage remains stable across –55 °C to +150 °C operating range due to controlled avalanche characteristics.
Is the MAPLAD36KP300A qualified for automotive applications?
Yes, the MAPLAD36KP300A is AEC-Q101 qualified, confirming its suitability for automotive under-hood environments including alternator load dump protection. It operates reliably from –55 °C to +150 °C junction temperature and withstands 1500 A forward surge current (IFSM). Its 300 V VWM rating aligns with 24 V commercial vehicle systems and 48 V mild-hybrid architectures when derated per application-specific transients.
Does the MAPLAD36KP300A meet RTCA DO-160 lightning protection standards?
Yes, the MAPLAD36KP300A is certified for RTCA DO-160F Section 22 lightning-induced transient testing, including Waveform 4 (6.4/69 μs) Level 5 pin injection protection. It also supports secondary lightning protection per IEC 61000-4-5 with 42 Ω source impedance (Class 5, short distance), making it suitable for flight-critical avionics power entry designs without additional external protection layers.
What is the thermal resistance and recommended mounting method for the MAPLAD36KP300A?
The MAPLAD36KP300A has a junction-to-case thermal resistance (RθJC) of 1.0 °C/W, achieved only when the metal base (cathode) is soldered to a minimum 1000 mm² copper pad per the pad layout in RF01216 Rev B. Use of thermal vias and internal copper planes is strongly recommended to maintain RθJA ≤ 50 °C/W and ensure multi-stroke reliability under repetitive surge conditions.
How does the MAPLAD36KP300A differ from bidirectional versions like MAPLAD36KP300CA?
The MAPLAD36KP300A is unidirectional with cathode on the metal base, intended for DC-biased protection where polarity is fixed. In contrast, MAPLAD36KP300CA is bidirectional, symmetrically clamping both polarities - required for AC-coupled or differential signal lines. Both share identical PPP (36 kW), VWM (300 V), and package dimensions, but their breakdown behavior and circuit placement rules differ fundamentally.
MAPLAD36KP300A 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):
- 300V
- Voltage - Breakdown (Min):
- 333V
- Voltage - Clamping (Max) @ Ipp:
- 483V
- Current - Peak Pulse (10/1000µs):
- 75A
- 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
MAPLAD36KP300A FAQ
1.How can I place an order for MAPLAD36KP300A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP300A 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 MAPLAD36KP300A reliable?
The price and inventory of MAPLAD36KP300A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP300A is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP300A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP300A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP300A?
MAPLAD36KP300A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP300A 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 MAPLAD36KP300A?
For technical support, including MAPLAD36KP300A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP300A requirements.
6.How does Aetrix verify that MAPLAD36KP300A is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP300A 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 MAPLAD36KP300A meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP300A?
All MAPLAD36KP300A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP300A, 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 MAPLAD36KP300A part is unused and in its original packaging.
Return procedure for MAPLAD36KP300A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP300A 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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D5V0P1B2LP-7B
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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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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