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Microchip Technology MPLAD36KP51CA/TR
- Part No.:
- MPLAD36KP51CA/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP51CA/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:2,791
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Product details
Overview
MPLAD36KP51CA/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 51 V working standoff voltage (VWM), 56.7–62.7 V breakdown voltage (VBR) at 5 mA, and 82.4 V clamping voltage (VC) at 437 A peak impulse current - designed for secondary lightning protection in avionics per RTCA DO-160G Waveform 4 and IEC 61000-4-5.
For engineers reviewing the MPLAD36KP51CA/TR datasheet, MPLAD36KP51CA/TR pinout, MPLAD36KP51CA/TR application, or MPLAD36KP51CA/TR equivalent, this part delivers verified bidirectional surge suppression with <5 ns clamping response, AEC-Q101 qualification, RoHS compliance (e3), and Level 1 moisture sensitivity - critical for high-reliability aerospace, automotive load dump, and industrial power rail protection.
Technical Context
This TVS diode operates in bidirectional avalanche mode to clamp both positive and negative transients symmetrically, enabling robust protection of differential signal lines or AC-coupled rails without polarity constraints. Its low thermal resistance (RθJC = 1.0 °C/W) and high junction-to-case heat transfer support multi-stroke surge endurance under RTCA DO-160 Section 22 test conditions.
The PLAD package features a metal base acting as the cathode terminal for unidirectional variants and as the common terminal for bidirectional operation, with void-free UL94V-0 epoxy molding and tin-plated terminals compliant with MIL-STD-750 Method 2026. It is characterized at 25 °C with IBR = 5 mA and validated for 1000 A surge testing per equipment limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 36,000 W at 10/1000 μs - sustains aircraft-level lightning surges without failure |
| Working Standoff Voltage (VWM) | 51 V DC - matches nominal 48 V telecom or vehicle battery systems |
| Breakdown Voltage (VBR) | 56.7–62.7 V at 5 mA - ensures reliable conduction onset above operating rail |
| Clamping Voltage (VC) | 82.4 V at 437 A - limits downstream voltage stress during worst-case surge |
| Peak Pulse Current (IPP) | 437 A at 10/1000 μs - exceeds IEC 61000-4-5 Class 4 requirements with 42 Ω source |
| Clamping Response Time | <5 ns (bidirectional) - fast enough to protect sensitive analog or digital interfaces |
| Temperature Coefficient (αVBR) | 58 mV/°C - enables predictable VBR shift over –55 to +150 °C operating range |
Pinout & Package
The MPLAD36KP51CA/TR uses the PLAD surface-mount package: a low-profile, thermally optimized thermoset epoxy body with metal base (cathode/common terminal) and two solderable terminals. Total weight is ~1.7–2.0 g; moisture sensitivity level is IPC/JEDEC J-STD-020D.1 Level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Anode side) | Anode connection (bidirectional) | One side of symmetrical avalanche junction; connects to protected line or node |
| Terminal 2 (Metal base) | Cathode / Common terminal | Thermally conductive mounting surface; serves as return path for both polarities |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional construction (CA suffix) | Enables symmetrical clamping on AC or floating rails without external polarity management |
| AEC-Q101 qualification | Validated for automotive under-hood environments including temperature cycling and mechanical shock |
| RTCA DO-160G Waveform 4 compliance | Rated for Level 4/5 pin injection protection (6.4/69 μs) up to 300 V standoff variants |
| IEC 61000-4-5 Class 4/5 secondary lightning protection | Supports 42 Ω and 12 Ω source impedances across multiple voltage classes without derating |
| 3σ lot norm screening on ID | Ensures consistent standby leakage (<10 µA at 51 V) across production lots for low-power systems |
Applications
| Aerospace Avionics Power Bus | Automotive 48 V Mild Hybrid System |
|---|---|
Use Scenario: Protection of ARINC 429 data bus power rails and sensor supply lines against induced lightning transients per DO-160G Section 22. IC Role / Device Role / Timing Role: Bidirectional TVS device clamping both polarities of coupled surges on 28 V or 48 V distribution networks. Use Value: Achieves Level 5 pin injection immunity (Waveform 4) with 51 V standoff, eliminating need for discrete polarity-splitting networks. |
Use Scenario: Load dump and jump-start surge suppression on 48 V battery management system (BMS) input stages in mild hybrid vehicles. IC Role / Device Role / Timing Role: High-energy transient shunt placed directly at BMS front-end to limit voltage excursion during ISO 16750-2 events. Use Value: Withstands 36 kW pulses and maintains clamping below 83 V, preserving gate oxide integrity of downstream SiC MOSFET drivers. |
| Industrial Ethernet Switch Power Rail | Renewable Energy Inverter DC Link |
Use Scenario: Secondary surge protection on PoE++ (IEEE 802.3bt) 54 V auxiliary power rails feeding switch ASICs and PHYs. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp limiting transient overshoot during EFT bursts and nearby lightning coupling. Use Value: Sub-5 ns response and 82.4 V clamping prevent latch-up in 3.3 V/5 V logic supplies sharing the same 54 V rail. |
Use Scenario: DC link overvoltage suppression in solar string inverters exposed to grid switching transients and lightning-induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing repetitive 10/1000 μs surges on 600–1000 V DC links during fault clearing. Use Value: 1.0 °C/W RθJC enables direct heatsink mounting, sustaining >1000 multi-stroke events per IEC 61000-4-5 Class 5 long-distance test profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | Lower peak power (600 W), SMB package, RθJA = 110 °C/W | Not suitable for DO-160G multi-stroke or IEC 61000-4-5 Class 4/5 | Select only for cost-sensitive, low-energy board-level ESD where 36 kW capability is unnecessary |
| SMCJ51CA | Higher peak power (1500 W), SMC package, RθJC = 2.5 °C/W, no AEC-Q101 or DO-160G validation | Lacks aviation qualification and thermal performance for sustained surge duty cycles | Acceptable for industrial IEC 61000-4-5 Class 3 if layout allows larger footprint and thermal relief |
Compared with SMBJ51CA and SMCJ51CA, the MPLAD36KP51CA/TR delivers 24× and 24× higher peak power respectively, with certified aerospace reliability, lower thermal resistance, and documented multi-stroke endurance - making it the sole option for mission-critical 48 V+ systems requiring RTCA DO-160G or AEC-Q101 compliance.
Availability
MPLAD36KP51CA/TR is available at Aetrix Electronics and suitable for aerospace avionics, automotive 48 V power systems, industrial Ethernet infrastructure, and renewable energy inverters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MPLAD36KP51CA/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 MPLAD36KP51CA/TR belongs to Microsemi's high-power PLAD-series TVS family, engineered specifically for multi-stroke lightning and load-dump protection in safety-critical platforms where thermal robustness and certification compliance are mandatory.
FAQ
What is the maximum clamping voltage of the MPLAD36KP51CA/TR at its rated peak pulse current?
The MPLAD36KP51CA/TR has a maximum clamping voltage (VC) of 82.4 V when subjected to its rated peak pulse current of 437 A at the 10/1000 μs waveform. This value is measured under standardized test conditions per IEC 61000-4-5 and is guaranteed across the full operating temperature range of –55 °C to +150 °C. The low clamping ratio (VC/VWM ≈ 1.62) reflects optimized junction design for minimal let-through voltage.
Is the MPLAD36KP51CA/TR qualified for automotive applications?
Yes, the MPLAD36KP51CA/TR is AEC-Q101 qualified, confirming its suitability for automotive electronic systems. This qualification includes stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - all performed on the exact MPLAD36KP51CA/TR device variant. It is commonly deployed in 48 V mild hybrid architectures for load dump and jump-start surge protection.
Does the MPLAD36KP51CA/TR meet RTCA DO-160G lightning protection requirements?
Yes, the MPLAD36KP51CA/TR is explicitly rated for RTCA DO-160G Section 22 lightning-induced transient protection and Waveform 4 (6.4/69 μs) pin injection up to Level 5 for standoff voltages ≤300 V. For the 51 V variant, it satisfies Level 4 and Level 5 requirements under standard test conditions at 25 °C, with documented performance curves in the official datasheet Revision B.
What is the thermal resistance from junction to case for the MPLAD36KP51CA/TR?
The MPLAD36KP51CA/TR has a junction-to-case thermal resistance (RθJC) of 1.0 °C/W, measured with the metal base mounted to a heatsink per specified test conditions. This ultra-low value enables efficient heat extraction during multi-pulse events and supports continuous operation in high-ambient environments such as engine compartments or avionics bays where thermal management is constrained.
How does the bidirectional configuration of the MPLAD36KP51CA/TR affect PCB layout?
The bidirectional configuration of the MPLAD36KP51CA/TR eliminates polarity concerns during placement - both terminals are functionally symmetric relative to the metal base, which serves as the common reference. Layout requires only a thermally robust copper pad under the metal base (per Figure 7 pad layout) and standard 2-pad SMT routing. No orientation marking or anode/cathode alignment is needed, simplifying assembly and reducing risk of misplacement.
MPLAD36KP51CA/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):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 437A
- 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
MPLAD36KP51CA/TR FAQ
1.How can I place an order for MPLAD36KP51CA/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP51CA/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 MPLAD36KP51CA/TR reliable?
The price and inventory of MPLAD36KP51CA/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP51CA/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP51CA/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP51CA/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP51CA/TR?
MPLAD36KP51CA/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP51CA/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 MPLAD36KP51CA/TR?
For technical support, including MPLAD36KP51CA/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP51CA/TR requirements.
6.How does Aetrix verify that MPLAD36KP51CA/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP51CA/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 MPLAD36KP51CA/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP51CA/TR?
All MPLAD36KP51CA/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP51CA/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 MPLAD36KP51CA/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP51CA/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP51CA/TR Tags
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