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Microchip Technology MAPLAD36KP400CAE3
- Part No.:
- MAPLAD36KP400CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP400CAE3.pdf
- Description:
- TVS DIODE 400VWM 644VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:3,429
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Product details
Overview
MAPLAD36KP400CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36,000 W peak pulse power at 10/1000 μs, clamps transients up to 644 V at 50 A, and features a 400 V reverse standoff voltage (VWM) with ±5% breakdown tolerance. It meets RTCA DO-160 Section 22 multi-stroke lightning requirements and IEC 61000-4-5 Class 5 secondary lightning protection with 42 Ω source impedance.
For engineers reviewing the MAPLAD36KP400CAE3 datasheet, MAPLAD36KP400CAE3 pinout, MAPLAD36KP400CAE3 application, or MAPLAD36KP400CAE3 equivalent, key selection criteria include its bidirectional polarity, 400 V VWM rating, 644 V maximum clamping voltage at IPP, RoHS-compliant e3 plating, and qualification per AEC-Q101 and MIL-PRF-19500 screening options.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device during overvoltage events, leveraging avalanche breakdown across its silicon junction. Its bidirectional construction enables symmetrical clamping for AC-coupled or floating signal lines, and it is rated for 100% surge testing per production lot.
Thermal design relies on low RθJC = 1.0 °C/W and optimized FR4 pad layout to sustain repetitive 0.05% duty-cycle impulses. It supports pin-injection protection per RTCA/DO-160F Waveform 4 (Level 4 up to 400 V) and Waveform 5A (Level 4 up to 78 V), with temperature derating guidance in MicroNote 132.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 400 V - Maximum continuous operating voltage before clamping begins; sets minimum system voltage margin. |
| V(BR) min/max | 444–492 V @ 5 mA - Confirmed breakdown range ensures reliable turn-on without premature conduction. |
| VC @ IPP | 644 V @ 50 A - Clamping voltage under full-rated surge; defines worst-case voltage seen by protected circuitry. |
| PPP | 36,000 W @ 10/1000 μs - Peak power handling capacity determines survivability against lightning-induced surges. |
| ID @ VWM | 10 μA max - Ultra-low leakage preserves signal integrity and minimizes standby power loss. |
| RθJC | 1.0 °C/W - Enables direct thermal coupling to heatsink or PCB copper; critical for repetitive surge duty. |
| Package | PLAD - Low-profile surface-mount package with metal base cathode; optimized for high-current thermal dissipation. |
Pinout & Package
The MAPLAD36KP400CAE3 uses a 2-terminal PLAD package with the metal base serving as the cathode terminal for bidirectional operation. The device has no polarity marking on the top surface; polarity is defined by the metal base orientation during mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode (Bidirectional Common Terminal) | Primary thermal path and current return node; must be soldered to large copper pour or heatsink. |
| Top Surface Pad | Anode (Bidirectional Common Terminal) | Signal-side connection point; symmetric with base for bidirectional clamping behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Enables protection of AC-coupled data lines or floating bus segments without polarity constraints. |
| 3σ lot norm screening on ID | Ensures consistent low-leakage performance across production lots for mission-critical reliability. |
| AEC-Q101 qualified | Validated for automotive electronics environments including temperature cycling, humidity, and mechanical shock. |
| MIL-PRF-19500 upscreening option | Supports high-reliability programs requiring traceable wafer lots, burn-in, and extended environmental testing. |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life limitations-enables standard SMT assembly without baking. |
Applications
| Aerospace Avionics Power Bus | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC aircraft power distribution networks from lightning-induced transients per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Primary surge suppression device placed at power entry points to clamp multi-stroke lightning surges up to 36 kW. Use Value: Enables compliance with Level 4 pin-injection protection (Waveform 4) and Class 5 secondary lightning (42 Ω source) without derating. | Use Scenario: Safeguarding 12 V/24 V ECU inputs against load dump and ISO 7637-2 pulses in commercial and heavy-duty vehicles. IC Role / Device Role / Timing Role: High-energy TVS placed upstream of DC-DC converters and microcontroller power rails. Use Value: Withstands 36,000 W surges while maintaining <10 μA leakage-preserving low-power sleep modes and sensor accuracy. |
| Industrial Motor Drive DC Link | Railway Signaling Interface |
Use Scenario: Suppressing switching transients on 400 V DC link buses in variable-frequency drives exposed to grid disturbances. IC Role / Device Role / Timing Role: Bidirectional clamping element across DC bus terminals to limit voltage overshoot during IGBT turn-off. Use Value: 644 V clamping at 50 A ensures downstream capacitors and gate drivers remain within safe operating area during repeated surges. | Use Scenario: Protecting 110 V DC trackside signaling interfaces from induced surges due to nearby traction currents or lightning coupling. IC Role / Device Role / Timing Role: Secondary protection device compliant with IEC 61000-4-5 Class 4 (2 Ω source) for long-distance line segments. Use Value: Validated for 400 V VWM operation with 2 Ω source impedance up to Class 3-supports robust field deployment without redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400CA | 600 W PPP rating (vs. 36,000 W); DO-214AA package; 648 V VC @ 52.3 A. | Not suitable for lightning-level energy; limited to low-energy ESD/EFT in consumer or telecom interfaces. | Select only for cost-sensitive, non-mission-critical applications where surge energy remains below 1 kA. |
| SMCJ400CA | 1500 W PPP rating (vs. 36,000 W); DO-214AB package; 644 V VC @ 233 A. | Lacks RTCA DO-160F Waveform 4/5A validation and AEC-Q101 qualification; not rated for multi-stroke lightning. | Acceptable for industrial IEC 61000-4-5 Class 3 protection but not for aerospace or automotive safety-critical nodes. |
Compared with SMBJ400CA and SMCJ400CA, the MAPLAD36KP400CAE3 provides 24× and 24× higher peak pulse power respectively, enabling single-device compliance with RTCA DO-160 Section 22 and AEC-Q101-eliminating cascaded TVS designs and reducing BOM count in high-reliability systems.
Availability
MAPLAD36KP400CAE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU power protection, and industrial motor drive DC link applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAPLAD36KP400CAE3 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 MAPLAD36KP400CAE3 belongs to Microsemi's high-power PLAD-series TVS family, engineered specifically for multi-stroke lightning protection and automotive load-dump immunity in safety-critical platforms.
FAQ
What is the clamping voltage of MAPLAD36KP400CAE3 at its rated peak pulse current?
The MAPLAD36KP400CAE3 exhibits a maximum clamping voltage (VC) of 644 V at 50 A peak pulse current (IPP), measured under 10/1000 μs waveform conditions. This value is specified in the Electrical Characteristics table and defines the upper voltage limit imposed on protected circuitry during full-rated surge events. The clamping performance is validated across production lots and remains stable over temperature when mounted per recommended pad layout.
Is MAPLAD36KP400CAE3 qualified for automotive applications?
Yes, MAPLAD36KP400CAE3 is qualified per AEC-Q101 for automotive applications. It undergoes stress testing including temperature cycling, highly accelerated life testing (HALT), and surge robustness verification. Its 400 V VWM rating and 644 V clamping voltage make it suitable for 24 V and 48 V ECU power rail protection against load dump and ISO 7637-2 pulses. Full qualification documentation is available upon request.
Does MAPLAD36KP400CAE3 meet RTCA DO-160 lightning protection requirements?
Yes, MAPLAD36KP400CAE3 is explicitly validated for RTCA DO-160 Section 22 multi-stroke lightning testing. It achieves Level 4 pin-injection protection for Waveform 4 (6.4/69 μs) and supports Class 5 secondary lightning protection per IEC 61000-4-5 with 42 Ω source impedance. These capabilities are confirmed in Rev B of datasheet RF01216 and referenced in MicroNote 132 for temperature derating.
What does the "CA" suffix indicate in MAPLAD36KP400CAE3?
The "CA" suffix in MAPLAD36KP400CAE3 denotes bidirectional construction. Unlike unidirectional variants ending in "A", the CA version provides symmetrical clamping for both positive and negative transients-essential for protecting AC-coupled signals, differential buses, or floating power domains. Polarity is implemented via dual avalanche junctions, with the metal base serving as the common terminal for both directions.
What thermal considerations apply when mounting MAPLAD36KP400CAE3?
MAPLAD36KP400CAE3 requires mounting on a thermally optimized pad layout per the datasheet's PAD LAYOUT diagram: 0.470″ × 0.230″ (11.94 mm × 5.85 mm) copper area with thermal vias to inner layers. Its RθJC of 1.0 °C/W demands direct thermal coupling to PCB copper or an external heatsink. For repetitive surges, steady-state power dissipation must stay below 71 W at TC = 100°C, and derating curves in Figure 3 must be applied above 25°C ambient.
MAPLAD36KP400CAE3 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):
- 400V
- Voltage - Breakdown (Min):
- 444V
- Voltage - Clamping (Max) @ Ipp:
- 644V
- Current - Peak Pulse (10/1000µs):
- 56A
- 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
MAPLAD36KP400CAE3 FAQ
1.How can I place an order for MAPLAD36KP400CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP400CAE3 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 MAPLAD36KP400CAE3 reliable?
The price and inventory of MAPLAD36KP400CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP400CAE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP400CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP400CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP400CAE3?
MAPLAD36KP400CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP400CAE3 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 MAPLAD36KP400CAE3?
For technical support, including MAPLAD36KP400CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP400CAE3 requirements.
6.How does Aetrix verify that MAPLAD36KP400CAE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP400CAE3 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 MAPLAD36KP400CAE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP400CAE3?
All MAPLAD36KP400CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP400CAE3, 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 MAPLAD36KP400CAE3 part is unused and in its original packaging.
Return procedure for MAPLAD36KP400CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP400CAE3 Tags
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ESD9B5.0ST5G
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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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
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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Diodes Incorporated
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