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Microchip Technology MPLAD36KP45CA/TR
- Part No.:
- MPLAD36KP45CA/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP45CA/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:4,239
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Product details
Overview
MPLAD36KP45CA/TR from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) rated for 36,000 W peak pulse power at 10/1000 μs, with 45 V working standoff voltage (VWM), 50.0–55.3 V breakdown voltage (VBR), and 72.7 V maximum clamping voltage (VC) at 496 A peak impulse current. It delivers lightning and load dump protection in aerospace avionics meeting RTCA DO-160 Section 22 Waveform 4 and 5A.
For engineers reviewing the MPLAD36KP45CA/TR datasheet, MPLAD36KP45CA/TR pinout, MPLAD36KP45CA/TR application, or MPLAD36KP45CA/TR equivalent, this device is selected for high-energy secondary surge suppression where low thermal resistance (RθJC = 1.0 °C/W), bidirectional polarity, and AEC-Q101 qualification are required in compact surface-mount designs.
Technical Context
This TVS diode operates in avalanche breakdown mode to clamp transients above its VWM, with sub-5 ns response time in bidirectional configuration and <100 ps for unidirectional variants. Its metal-base cathode construction enables direct thermal coupling to PCB copper or heatsinks, supporting sustained power dissipation up to 504 W at TC = 100 °C.
The PLAD package integrates void-free UL94V-0 epoxy molding and matte-tin-plated terminals compliant with MIL-STD-750 Method 2026. It achieves IEC 61000-4-5 Class 5 protection (42 Ω source) up to 300 V standoff and RTCA DO-160G Level 5 pin injection for Waveform 5A only up to 38 V VWM - confirming MPLAD36KP45CA/TR's suitability for Level 4 Waveform 5A (≤78 V) and full Level 4/5 Waveform 4 (≤400 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous DC or repetitive peak reverse voltage before conduction begins; sets minimum system operating margin. |
| VBR @ IBR | 50.0–55.3 V at 5 mA - Confirmed breakdown threshold range; ensures reliable turn-on before damaging overvoltage occurs. |
| VC @ IPP | 72.7 V at 496 A - Clamped voltage during 10/1000 μs surge; defines maximum stress imposed on protected downstream circuitry. |
| PPP | 36,000 W - Peak pulse power rating at 10/1000 μs; validates capability to absorb multi-stroke lightning energy per DO-160. |
| RθJC | 1.0 °C/W - Junction-to-case thermal resistance; enables high-power derating when mounted on heatsinked copper pads. |
| ID max | 10 µA at VWM - Low leakage current; minimizes standby power loss and avoids false triggering in high-impedance bias networks. |
| TJ/TSTG | –55 to +150 °C - Extended temperature range supports operation in automotive engine bays and avionics bays without derating. |
Pinout & Package
The MPLAD36KP45CA/TR uses the PLAD surface-mount package with a metal base acting as the cathode terminal. The anode is the top metallized surface; polarity is marked by cathode bar on body and confirmed by metal base contact.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary heat path and return node; must be soldered to large copper pour or heatsink for thermal management. |
| Top Metallized Surface | Anode | Transient input node; connects to line being protected (e.g., aircraft 28 V DC bus or CAN bus lines). |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional construction (CA suffix) | Clamps both positive and negative transients symmetrically - essential for AC-coupled data lines and floating power rails. |
| AEC-Q101 qualified | Validated for automotive under-hood applications including load dump (ISO 7637-2 Pulse 5a/b) and ESD robustness. |
| RTCA DO-160G Section 22 compliance | Meets multi-stroke lightning test requirements for commercial aircraft systems using Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs). |
| Moisture sensitivity Level 1 | No dry pack or baking required before reflow - simplifies SMT assembly and reduces manufacturing cost. |
| RoHS-compliant (e3 marking) | Lead-free matte-tin plating meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-020D.1 standards. |
Applications
| Aerospace Avionics Power Bus Protection | Automotive 12 V/24 V Load Dump Suppression |
|---|---|
Use Scenario: Protecting 28 V DC distribution buses in commercial aircraft against induced lightning transients per RTCA DO-160G Section 22. IC Role / Device Role / Timing Role: Bidirectional TVS diode clamping transient overvoltage on main power rail during multi-stroke lightning events. Use Value: Enables compliance with Level 4/5 Waveform 4 (6.4/69 μs) and Level 4 Waveform 5A (40/120 μs) without external heatsinking due to RθJC = 1.0 °C/W. |
Use Scenario: Safeguarding engine control units (ECUs) and infotainment modules from alternator load dump spikes in 12 V/24 V vehicle electrical systems. IC Role / Device Role / Timing Role: High-energy transient suppressor placed at power entry point to limit bus voltage to ≤72.7 V during ISO 7637-2 Pulse 5a (100 V, 400 ms). Use Value: Withstands 36 kW surges while maintaining <10 µA leakage at 45 V, preventing battery drain and false resets in always-on modules. |
| Industrial Ethernet Port Surge Protection | Railway Signaling Interface Protection |
Use Scenario: Secondary surge protection on PoE-powered Ethernet ports (IEEE 802.3af/at) exposed to induced surges in factory automation environments. IC Role / Device Role / Timing Role: Bidirectional clamping device across differential pairs or power/data lines to limit common-mode transients to safe levels. Use Value: 72.7 V clamping voltage ensures protected PHY ICs (e.g., DP83848) remain within absolute maximum ratings during IEC 61000-4-5 42 Ω Class 4 surges. |
Use Scenario: Protecting 70–110 V DC signaling interfaces in railway signaling cabinets from traction-induced surges and EFT bursts. IC Role / Device Role / Timing Role: Standoff-rated TVS placed on track-side signal inputs to clamp fast-rising transients from electromagnetic coupling near electrified rails. Use Value: 45 V VWM provides sufficient margin above nominal 36 V logic supply while delivering 496 A IPP capacity for long-duration surges per EN 50121-4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45CA | Lower PPP (600 W), higher VC (73.5 V), SMB package with RθJA = 110 °C/W | Limited to single-stroke surges; unsuitable for DO-160 multi-stroke or automotive load dump repetition. | Select only for cost-sensitive, low-energy consumer electronics where 36 kW rating is unnecessary. |
| SMCJ45CA | Higher PPP (1500 W), same VC (73.5 V), SMC package with RθJC = 2.5 °C/W | Supports moderate repetition but lacks AEC-Q101 and DO-160 certification; not traceable to wafer lot. | Use where industrial-grade surge rating suffices and aerospace/automotive qualification is not mandated. |
Compared with SMBJ45CA and SMCJ45CA, the MPLAD36KP45CA/TR delivers 24× and 24× higher peak power handling respectively, with certified AEC-Q101 reliability, DO-160G compliance, and 2.5× lower thermal resistance - making it the sole option for certified multi-stroke lightning protection in safety-critical platforms.
Availability
MPLAD36KP45CA/TR is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU power inputs, and industrial Ethernet port protection requiring stable component supply across extended product lifecycles.
Supply support for MPLAD36KP45CA/TR 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and power solutions for aerospace, defense, and industrial markets.
The MPLAD36KP45CA/TR belongs to Microsemi's high-power PLAD TVS family, engineered specifically for certified lightning and load dump protection in mission-critical systems where thermal performance and multi-stroke endurance are non-negotiable.
FAQ
What is the clamping voltage of MPLAD36KP45CA/TR at its rated peak pulse current?
The MPLAD36KP45CA/TR has a maximum clamping voltage (VC) of 72.7 V at 496 A peak impulse current (IPP) under the standard 10/1000 μs waveform. This value is measured across the device terminals during surge conduction and defines the upper voltage limit imposed on protected circuitry - critical for ensuring downstream ICs like regulators or microcontrollers remain within their absolute maximum ratings during transient events.
Is MPLAD36KP45CA/TR qualified for automotive applications?
Yes, the MPLAD36KP45CA/TR is AEC-Q101 qualified, validating its reliability for automotive under-hood and chassis applications. It meets ISO 7637-2 Pulse 5a/b load dump requirements and demonstrates robustness against ESD (IEC 61000-4-2) and EFT (IEC 61000-4-4). Its –55 to +150 °C operating range and 1.0 °C/W thermal resistance further support deployment in harsh vehicle environments where thermal cycling and high ambient temperatures are routine.
How does the PLAD package of MPLAD36KP45CA/TR improve thermal performance compared to SMB/SMC packages?
The PLAD package of MPLAD36KP45CA/TR features a metal base that serves as the cathode and primary thermal path, achieving a junction-to-case thermal resistance (RθJC) of just 1.0 °C/W - 2.5× lower than SMCJ devices and over 100× better than SMBJ types. This allows efficient heat transfer directly to PCB copper pours or external heatsinks, enabling sustained high-power surge absorption without thermal runaway, especially critical in multi-stroke lightning testing per RTCA DO-160G.
Can MPLAD36KP45CA/TR be used for RTCA DO-160G Section 22 Waveform 5A compliance?
Yes, MPLAD36KP45CA/TR is rated for RTCA DO-160G Section 22 Waveform 5A (40/120 μs) up to Level 4 (≤78 V VWM). Since its VWM is 45 V and VBR range is 50.0–55.3 V, it falls within the Level 4 specification envelope. It is not rated for Level 5 Waveform 5A, which requires VWM ≤38 V - confirming MPLAD36KP45CA/TR's precise applicability for Level 4 avionics interface protection.
What is the meaning of the "TR" suffix in MPLAD36KP45CA/TR?
The "TR" suffix in MPLAD36KP45CA/TR indicates tape-and-reel packaging per EIA-481-B standard, optimized for automated SMT placement. This format ensures consistent orientation, controlled feeding, and reduced handling damage during high-volume assembly. The TR variant maintains identical electrical, thermal, and reliability specifications as the bulk version - only the packaging method differs, with no impact on performance or qualification status.
MPLAD36KP45CA/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 496A
- Power - Peak Pulse:
- 36000W (36kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PLAD
MPLAD36KP45CA/TR FAQ
1.How can I place an order for MPLAD36KP45CA/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP45CA/TR 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 MPLAD36KP45CA/TR reliable?
The price and inventory of MPLAD36KP45CA/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP45CA/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP45CA/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP45CA/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP45CA/TR?
MPLAD36KP45CA/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP45CA/TR 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 MPLAD36KP45CA/TR?
For technical support, including MPLAD36KP45CA/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP45CA/TR requirements.
6.How does Aetrix verify that MPLAD36KP45CA/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP45CA/TR 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 MPLAD36KP45CA/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP45CA/TR?
All MPLAD36KP45CA/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP45CA/TR, 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 MPLAD36KP45CA/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP45CA/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP45CA/TR Tags
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