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Microchip Technology MPLAD36KP54A/TR
- Part No.:
- MPLAD36KP54A/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP54A/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:6,879
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Product details
Overview
MPLAD36KP54A/TR from Microsemi (now Microchip) is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power rails. It delivers 36 kW peak pulse power at 10/1000 μs, clamps transients to ≤87.1 V at 414 A, and operates with a 54 V working standoff voltage and 60.0–66.3 V breakdown range. It is AEC-Q101 qualified and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MPLAD36KP54A/TR datasheet, MPLAD36KP54A/TR pinout, MPLAD36KP54A/TR application, or MPLAD36KP54A/TR equivalent, this device is selected for high-reliability DC bus protection where low thermal resistance (RθJC = 1.0 °C/W), fast clamping (<100 ps), and IEC 61000-4-5 Class 4/5 compliance are critical - especially in avionics power distribution units and 24/48 V vehicle systems.
Technical Context
This TVS diode uses silicon avalanche junction technology optimized for low dynamic impedance and minimal cumulative heating under repeated surges. Its PLAD package features a metal base acting as the cathode terminal and provides direct thermal path to PCB copper, enabling efficient heat dissipation with RθJA = 50 °C/W on FR4 (1 oz Cu).
It is rated for operation from –55 °C to +150 °C, supports steady-state power dissipation up to 504 W at TC = 100 °C, and exhibits a temperature coefficient of breakdown voltage (αV(BR)) of ±64 mV/°C - enabling predictable derating across extended temperature ranges in engine bay or avionics bay installations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous DC or peak reverse voltage the device blocks without conduction; sets minimum system operating voltage margin. |
| V(BR) | 60.0–66.3 V at 5 mA - Confirmed breakdown onset range; ensures reliable turn-on before downstream component damage thresholds. |
| VC @ IPP | ≤87.1 V at 414 A (10/1000 μs) - Clamping voltage during worst-case surge; defines maximum stress seen by protected ICs or MOSFETs. |
| IPP | 414 A - Peak impulse current capability; determines survivability against IEC 61000-4-5 42 Ω source (Class 4/5) and DO-160G Waveform 4/5A events. |
| RθJC | 1.0 °C/W - Junction-to-case thermal resistance; enables direct heatsinking via metal base for sustained surge duty cycles. |
| αV(BR) | ±64 mV/°C - Temperature coefficient of breakdown voltage; allows accurate thermal derating in high-ambient environments. |
| Package | PLAD - Surface-mount, low-profile thermoset epoxy package with metal cathode base; optimized for high-current PCB thermal management. |
Pinout & Package
The MPLAD36KP54A/TR uses a 2-terminal PLAD package. The metal base (underside) is the cathode; the top metallized surface is the anode. No internal die bonding wires - direct chip-to-base construction minimizes inductance and improves surge response.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface) | Positive surge current entry point | Connected to protected line (e.g., 24 V rail); conducts surge current toward cathode during overvoltage event. |
| Cathode (metal base) | Return path / thermal interface | Electrically connected to ground or chassis; simultaneously serves as primary thermal conduction path to PCB copper pour or heatsink. |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW peak pulse rating | Enables single-device protection against severe lightning-induced transients per RTCA DO-160G Section 22 and IEC 61000-4-5 Class 5 (short distance). |
| AEC-Q101 qualification | Validates reliability for automotive power electronics including alternator load dump and battery disconnect transients. |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints - simplifies SMT assembly and inventory handling. |
| Low clamping ratio (VC/VWM ≈ 1.61) | Minimizes overvoltage overshoot during clamping - protects sensitive gate drivers and microcontrollers on same rail. |
| Traceable wafer and assembly lots | Supports full lot-level failure analysis and supply chain transparency for aerospace and defense programs. |
Applications
| Aerospace Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC main bus in commercial aircraft avionics bays against multi-stroke lightning surges per RTCA DO-160G Section 22 Waveform 4 and 5A. IC Role / Device Role / Timing Role: Primary high-energy clamping device placed at bus entry point; absorbs >95% of surge energy before it reaches downstream DC/DC converters and flight control processors. Use Value: Enables compliance with Level 4/5 pin-injection immunity without external heatsinking - leveraging PLAD metal base for direct thermal coupling to aluminum chassis. | Use Scenario: Load dump suppression on 12 V/24 V power input to engine control modules exposed to ISO 7637-2 Pulse 5a (120 V, 400 ms). IC Role / Device Role / Timing Role: Unidirectional TVS placed upstream of LDO regulators and CAN transceivers; clamps transients within 100 ps to prevent latch-up or gate oxide rupture. Use Value: Withstands 414 A peak current and maintains VC ≤ 87.1 V - ensuring protected ICs remain within absolute maximum ratings during worst-case alternator field collapse. |
| Industrial Motor Drive DC Bus | Railway Signaling Power Supply |
Use Scenario: Secondary surge protection on 400 V DC intermediate bus of variable frequency drives subjected to switching transients and EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: Parallel-connected TVS array element; shares surge current with MOVs while providing faster response and lower clamping than varistors alone. Use Value: Low RθJC = 1.0 °C/W allows stacking multiple units on shared thermal pad - sustaining repetitive 10/1000 μs surges at 0.05% duty cycle without thermal runaway. | Use Scenario: Protection of 110 V DC signaling power feeders in railway interlocking systems against induced lightning surges per EN 50121-4. IC Role / Device Role / Timing Role: Standoff-voltage-matched TVS (VWM = 54 V) used in series-string configuration to scale clamping level for higher-voltage rails. Use Value: Tight V(BR) tolerance (60.0–66.3 V) ensures uniform voltage sharing across series strings - preventing premature failure of individual devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54A | Lower peak power (600 W), smaller SMB package, RθJC = 15 °C/W, VC = 87.1 V at 6.9 A | Not suitable for DO-160G Level 5 or IEC 61000-4-5 Class 4/5; limited to low-energy ESD/EFT. | Select only for cost-sensitive consumer-grade designs with <1 kA surge exposure. |
| SMCJ54A | Higher peak power (1500 W), SMC package, RθJC = 3.5 °C/W, VC = 87.1 V at 17.3 A | Insufficient for 36 kW multi-stroke lightning; requires parallel devices to approach MPLAD36KP54A/TR energy handling. | Choose when board space allows larger SMC footprint and thermal design supports moderate surge repetition. |
Compared with SMBJ54A and SMCJ54A, the MPLAD36KP54A/TR delivers 24× and 24× higher peak pulse power respectively, with superior thermal performance (RθJC = 1.0 °C/W) and verified DO-160G compliance - making it the only option for single-device, high-reliability lightning protection in aerospace and heavy-duty automotive systems.
Availability
MPLAD36KP54A/TR is available at Aetrix Electronics and suitable for aerospace power distribution, automotive ECU protection, and industrial motor drive DC bus applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MPLAD36KP54A/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 management solutions for aerospace, defense, and industrial markets.
The MPLAD36KP54A/TR belongs to Microsemi's high-power PLAD-series TVS family, engineered specifically for mission-critical surge protection where thermal robustness, multi-stroke endurance, and regulatory compliance (DO-160, AEC-Q101, IEC 61000-4-5) are non-negotiable.
FAQ
What is the clamping voltage of MPLAD36KP54A/TR at its rated peak pulse current?
The MPLAD36KP54A/TR has a maximum clamping voltage (VC) of 87.1 V when subjected to its rated peak pulse current (IPP) of 414 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and defines the upper voltage limit imposed on protected circuitry during a full-rated surge event. The MPLAD36KP54A/TR maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C) with minimal drift due to its specified αV(BR) of ±64 mV/°C.
Is MPLAD36KP54A/TR RoHS-compliant and what does the "TR" suffix indicate?
Yes, the MPLAD36KP54A/TR is RoHS-compliant, as confirmed by its "e3" marking designation per Microsemi's nomenclature. The "TR" suffix indicates tape-and-reel packaging per EIA-481-B standard - optimized for automated SMT placement. Each reel contains factory-specified quantities, and the device's moisture sensitivity level is IPC/JEDEC J-STD-020D.1 Level 1, eliminating dry-pack requirements and supporting indefinite floor life prior to reflow.
How does the PLAD package of MPLAD36KP54A/TR improve thermal performance compared to standard SMC or SMB packages?
The PLAD package of MPLAD36KP54A/TR uses a void-free transfer-molded epoxy body with an exposed metal base that serves as both the cathode terminal and primary thermal interface. This design achieves RθJC = 1.0 °C/W - over 3× better than SMCJ54A (3.5 °C/W) and 15× better than SMBJ54A (15 °C/W). The metal base allows direct conduction of surge-generated heat into PCB copper pours or external heatsinks, enabling sustained operation under repetitive surges without thermal saturation - a key advantage in avionics and traction power systems.
Can MPLAD36KP54A/TR be used for bidirectional surge protection?
No, MPLAD36KP54A/TR is a unidirectional TVS diode, as indicated by its "A" suffix (not "CA"). It conducts only during reverse-biased overvoltage events - i.e., when the anode is more negative than the cathode. For bidirectional AC-line or data-line protection, a "CA"-suffixed variant such as MPLAD36KP54CA must be selected. Using MPLAD36KP54A/TR on AC signals or floating rails risks forward conduction and permanent damage during normal operation.
What standards does MPLAD36KP54A/TR meet for lightning surge immunity testing?
The MPLAD36KP54A/TR is validated for RTCA DO-160G Section 22 multi-stroke lightning testing (Waveform 4: 6.4/69 μs and Waveform 5A: 40/120 μs) at Level 4 and Level 5 for VWM = 54 V devices. It also meets IEC 61000-4-5 for secondary lightning protection with 42 Ω, 12 Ω, and 2 Ω source impedances across Classes 1–5, depending on distance and configuration. These certifications are documented in Microsemi's official test reports and application notes, not inferred from family-level claims.
MPLAD36KP54A/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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 414A
- 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
MPLAD36KP54A/TR FAQ
1.How can I place an order for MPLAD36KP54A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP54A/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 MPLAD36KP54A/TR reliable?
The price and inventory of MPLAD36KP54A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP54A/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP54A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP54A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP54A/TR?
MPLAD36KP54A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP54A/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 MPLAD36KP54A/TR?
For technical support, including MPLAD36KP54A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP54A/TR requirements.
6.How does Aetrix verify that MPLAD36KP54A/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP54A/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 MPLAD36KP54A/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP54A/TR?
All MPLAD36KP54A/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP54A/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 MPLAD36KP54A/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP54A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP54A/TR Tags
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