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Microchip Technology MAPLAD36KP350A
- Part No.:
- MAPLAD36KP350A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP350A.pdf
- Description:
- TVS DIODE 350VWM 564VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,104
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Product details
Overview
MAPLAD36KP350A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive power systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps transients to ≤564 V at 100 A, and features a 350 V reverse standoff voltage (VWM), 389–431 V breakdown voltage (V(BR)), and 1.0 °C/W junction-to-case thermal resistance. It is qualified to AEC-Q101 and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MAPLAD36KP350A datasheet, MAPLAD36KP350A pinout, MAPLAD36KP350A application, or MAPLAD36KP350A equivalent, key selection criteria include its 350 V VWM rating, unidirectional polarity, low-profile PLAD package with metal-base cathode, and compliance with IEC 61000-4-5 (Class 3, 42 Ω source) and RTCA/DO-160F Waveform 4 Level 4 protection.
Technical Context
The MAPLAD36KP350A employs an avalanche diode structure optimized for fast response (<100 ps turn-on) and high-energy dissipation in compact surface-mount form. Its metal-base thermal path enables direct heat sinking, supporting sustained operation under repetitive surges at ≤0.05% duty factor when mounted on FR4 with recommended pad layout.
It operates across –55°C to +150°C junction temperature range and is characterized for clamping performance at IPP = 100 A (VC ≤ 564 V), with standby leakage ID ≤ 10 μA at VWM = 350 V. The device is fully surge-tested per AEC-Q101 and supports secondary lightning protection per IEC 61000-4-5 with 42 Ω, 12 Ω, and 2 Ω source impedances.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - enables robust protection against lightning-induced transients and load dump events |
| Reverse Standoff Voltage (VWM) | 350 V - maximum continuous DC or peak AC voltage the device blocks without conduction |
| Breakdown Voltage (V(BR)) | 389–431 V @ 5 mA - defines minimum clamping onset threshold under surge conditions |
| Clamping Voltage (VC) | ≤564 V @ 100 A - limits downstream circuit voltage during worst-case surge, protecting 300–400 V rated components |
| Thermal Resistance (RθJC) | 1.0 °C/W - allows efficient heat transfer to heatsink, critical for multi-pulse reliability in avionics |
| Standby Leakage (ID) | ≤10 μA @ 350 V - ensures minimal power loss and signal integrity in always-on systems |
| Junction Temperature Range | –55°C to +150°C - supports deployment in engine bays, flight control units, and other extreme environments |
Pinout & Package
MAPLAD36KP350A uses the PLAD surface-mount package: void-free UL94V-0 epoxy body (12.32 × 10.54 × 5.08 mm), tin-lead or RoHS-compliant matte-tin terminals, and metal base acting as cathode terminal. Polarity marking is present only on unidirectional versions; cathode connects to the metal base underside.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary current return path and thermal interface - must be soldered to copper pour or heatsink for RθJC = 1.0 °C/W performance |
| Top Surface Pad | Anode | Signal/power input node - connects to protected line (e.g., 28 V aircraft bus or 12 V automotive rail) |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile surface-mount PLAD package | Enables PCB space savings vs. through-hole TVS while maintaining 36 kW surge capability and direct thermal coupling |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and chassis applications requiring extended lifetime under thermal cycling and vibration |
| RTCA DO-160 Section 22 compliance | Meets multi-stroke lightning test requirements for commercial aircraft electronics, including waveform 4 (6.4/69 μs) Level 4 |
| IEC 61000-4-5 Class 3 support (42 Ω source) | Provides certified secondary lightning protection for avionics subsystems interfacing with external wiring harnesses |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints - simplifies SMT assembly and inventory management |
Applications
| Avionics Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC distribution boards in commercial aircraft against induced lightning transients from wingtip strikes and ground loops. IC Role / Device Role / Timing Role: Unidirectional TVS placed at bus entry point to clamp surges before they reach upstream DC-DC converters and microcontrollers. Use Value: With VC ≤ 564 V and PPP = 36 kW, MAPLAD36KP350A prevents latch-up or burnout in 600 V MOSFETs and 3.3 V logic supplies during DO-160F Waveform 4 Level 4 events. | Use Scenario: Safeguarding 12 V supply inputs of diesel ECU modules exposed to ISO 7637-2 load dump pulses up to 120 V. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main battery feed, operating in parallel with upstream fuse and downstream L-C filter. Use Value: Clamps 350 V transients within <100 ps and sustains 100 A surges without degradation - meeting AEC-Q101 stress test requirements for 1000 cycles. |
| Railway Signaling Interface | Industrial Motor Drive DC Bus |
Use Scenario: Shielding 24 V signaling lines in track-side interlocking systems from EFT bursts and induced surges during lightning storms. IC Role / Device Role / Timing Role: Bidirectional-capable variant (MAPLAD36KP350CA) used for AC-coupled data lines; unidirectional MAPLAD36KP350A applied to DC power rails. Use Value: 10 μA max ID at 350 V ensures no false triggering on nominal 24 V rails, while 564 V clamping protects 400 V-rated optocouplers and isolators. | Use Scenario: Suppressing commutation spikes on 300–400 V DC bus of variable-frequency drives powering HVAC compressors in data centers. IC Role / Device Role / Timing Role: High-power TVS connected between bus+ and chassis ground, absorbing regenerative energy during rapid deceleration. Use Value: 1.0 °C/W RθJC enables mounting directly to aluminum busbar heatsink - sustaining >1000 surge events at 0.05% duty cycle without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ350A | Lower PPP (600 W), smaller SMB package, higher RθJA (50 °C/W), no AEC-Q101 or DO-160 qualification | Suitable for consumer-grade 350 V DC circuits; not rated for aerospace lightning or automotive load dump | Select MAPLAD36KP350A where 36 kW surge handling, metal-base thermal path, or aviation certification is required. |
| SMCJ350A | PPP = 1500 W, SMC package, RθJC ≈ 2.5 °C/W, AEC-Q101 qualified but not DO-160 tested | Valid for industrial motor controls and telecom power supplies; lacks multi-stroke lightning validation | Choose MAPLAD36KP350A when system-level compliance to RTCA DO-160 Section 22 or IEC 61000-4-5 Class 3/4 is mandatory. |
Compared with SMBJ350A and SMCJ350A, MAPLAD36KP350A provides 24× and 24× higher peak pulse power respectively, a thermally superior metal-base package enabling direct heatsinking, and formal qualification to both AEC-Q101 and RTCA DO-160 - making it the only option for certified high-reliability 350 V rail protection in aerospace and heavy-duty automotive systems.
Availability
MAPLAD36KP350A is available at Aetrix Electronics and suitable for avionics power distribution, automotive ECU protection, and industrial motor drive DC bus applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAPLAD36KP350A 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 analog, mixed-signal, and power semiconductors for aerospace, defense, communications, and industrial markets.
The MAPLAD36KP350A belongs to Microsemi's high-power PLAD TVS family, engineered specifically for certified lightning and load-dump protection in safety-critical platforms where thermal performance, surge endurance, and regulatory compliance are non-negotiable.
FAQ
What is the clamping voltage of MAPLAD36KP350A at its rated peak pulse current?
The MAPLAD36KP350A has a maximum clamping voltage (VC) of 564 V at 100 A peak pulse current under 10/1000 μs waveform conditions. This value is measured per standard test methods defined in the datasheet and ensures downstream 400 V-rated components remain within safe operating limits during surge events. The MAPLAD36KP350A maintains this clamping performance across its full operating temperature range.
Is MAPLAD36KP350A qualified for automotive applications?
Yes, MAPLAD36KP350A is AEC-Q101 qualified, confirming its suitability for automotive power electronics including engine control units, battery management systems, and ADAS domain controllers. It withstands temperature cycling, mechanical shock, and humidity testing per AEC-Q101 Rev H. The MAPLAD36KP350A also meets ISO 7637-2 load dump immunity requirements when applied with proper PCB layout and thermal management.
Does MAPLAD36KP350A require special PCB layout considerations?
Yes - the MAPLAD36KP350A requires a dedicated thermal pad layout per Microsemi's recommended footprint (0.470″ × 0.230″ copper area) to achieve its specified 1.0 °C/W junction-to-case thermal resistance. The metal base must be soldered to a solid copper pour or heatsink; inadequate copper area increases thermal impedance and reduces surge endurance. The MAPLAD36KP350A datasheet provides exact pad dimensions and via placement guidance.
Can MAPLAD36KP350A be used for bidirectional surge protection?
No - MAPLAD36KP350A is unidirectional. For bidirectional protection at 350 V standoff, the functionally matched part is MAPLAD36KP350CA (with CA suffix). The MAPLAD36KP350CA shares identical PPP, VWM, and thermal specs but features symmetrical breakdown in both polarities, enabling use on AC-coupled or floating signal lines where polarity reversal may occur.
What certifications does MAPLAD36KP350A meet beyond AEC-Q101?
In addition to AEC-Q101, MAPLAD36KP350A is validated to RTCA DO-160F Section 22 for multi-stroke lightning (Waveform 4 Level 4, 6.4/69 μs), IEC 61000-4-5 for secondary lightning (Class 3, 42 Ω source), and IEC 61000-4-2/4-4 for ESD and EFT. These certifications are documented in Microsemi's RF01216 Rev B datasheet and supported by lot-level surge testing - all confirmed for the MAPLAD36KP350A device.
MAPLAD36KP350A 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):
- 350V
- Voltage - Breakdown (Min):
- 389V
- Voltage - Clamping (Max) @ Ipp:
- 564V
- Current - Peak Pulse (10/1000µs):
- 64A
- 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
MAPLAD36KP350A FAQ
1.How can I place an order for MAPLAD36KP350A through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP350A 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 MAPLAD36KP350A reliable?
The price and inventory of MAPLAD36KP350A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP350A is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP350A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP350A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP350A?
MAPLAD36KP350A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP350A 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 MAPLAD36KP350A?
For technical support, including MAPLAD36KP350A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP350A requirements.
6.How does Aetrix verify that MAPLAD36KP350A is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP350A 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 MAPLAD36KP350A meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP350A?
All MAPLAD36KP350A units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP350A, 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 MAPLAD36KP350A part is unused and in its original packaging.
Return procedure for MAPLAD36KP350A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP350A 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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