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Microchip Technology MPLAD36KP51A/TR
- Part No.:
- MPLAD36KP51A/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP51A/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:3,548
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Product details
Overview
MPLAD36KP51A/TR from Microchip Technology (formerly Microsemi) 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 ≤82.4 V at 437 A, and features a 51 V working standoff voltage with 56.7–62.7 V breakdown range at 5 mA.
For engineers reviewing the MPLAD36KP51A/TR datasheet, MPLAD36KP51A/TR pinout, MPLAD36KP51A/TR application, or MPLAD36KP51A/TR equivalent, this device is selected for DO-160G Section 22 multi-stroke lightning compliance, load dump suppression, and IEC 61000-4-5 Class 4/5 secondary protection where low thermal resistance (1.0 °C/W junction-to-case) and fast clamping (<100 ps) are critical.
Technical Context
This TVS diode operates in avalanche breakdown mode to clamp overvoltage events, with bidirectional variants designated by "CA" suffix - absent here, confirming unidirectional polarity. Its metal-base cathode construction enables direct thermal coupling to heatsinks, supporting sustained power dissipation up to 504 W at 100 °C case temperature.
Clamping performance is specified at 437 A peak impulse current (IPP), delivering VC ≤ 82.4 V while maintaining <10 µA standby leakage at 51 V (VWM). Temperature coefficient of breakdown voltage is +58 mV/°C, enabling predictable derating across –55 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 36,000 W at 10/1000 μs - sustains aircraft lightning strike energy without failure |
| Working Standoff Voltage (VWM) | 51 V - matches nominal 48 V DC systems with margin against ripple and transients |
| Clamping Voltage (VC) | ≤82.4 V at IPP = 437 A - ensures downstream ICs see safe voltage during surge |
| Breakdown Voltage (VBR) | 56.7–62.7 V at IBR = 5 mA - defines precise conduction onset threshold |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to PCB copper or external heatsink |
| Standby Leakage Current | ≤10 µA at 51 V - negligible power loss in always-on 48 V rail monitoring |
| Clamping Response Time | <100 ps - reacts before ESD or lightning-induced edge transients propagate |
Pinout & Package
The MPLAD36KP51A/TR uses the PLAD package: a surface-mount, void-free thermosetting epoxy body with exposed metal base acting as the cathode terminal. The anode is connected to the top metallization. Package dimensions conform to standard PLAD outline (10.3 × 8.9 × 4.1 mm), optimized for high-current thermal path and FR4 PCB mounting with recommended pad layout per Figure 7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary heat sink interface and high-current return path; must be soldered to large copper pour |
| Top Metallization | Anode | Input-side connection point for protected line; routed with minimal trace inductance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood environments including thermal cycling and humidity exposure |
| RTCA DO-160G Section 22 compliant | Passes multi-stroke lightning test Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs) up to Level 5 |
| Moisture Sensitivity Level 1 | No dry pack or baking required prior to reflow - simplifies SMT manufacturing |
| RoHS-compliant (e3) | Meets EU RoHS Directive 2011/65/EU with matte-tin plating and halogen-free epoxy |
| 3σ lot norm screening on ID | Ensures consistent standby leakage across production lots for reliable system-level power budgeting |
Applications
| Aerospace Avionics Power Protection | Automotive 48 V Mild Hybrid Systems |
|---|---|
Use Scenario: Protecting flight control bus power inputs against induced lightning currents per DO-160G Section 22. IC Role / Device Role / Timing Role: Primary surge shunt element placed at board entry point, clamping transients before they reach DC-DC converters and microcontrollers. Use Value: Withstands ≥3 strokes at 437 A without degradation, ensuring functional safety integrity over aircraft service life. |
Use Scenario: Safeguarding 48 V battery management system (BMS) inputs during load dump events in mild hybrid vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between alternator output and BMS input, absorbing 120 V/200 ms transients. Use Value: Clamps to ≤82.4 V within 100 ps, preventing damage to 100 V-rated MOSFETs and analog front-ends. |
| Industrial 48 V DC Distribution Panels | Railway Signaling Power Interfaces |
Use Scenario: Securing programmable logic controller (PLC) power inputs against switching surges from inductive loads in factory automation. IC Role / Device Role / Timing Role: Front-end protection device mounted directly on DIN-rail power supply output terminals. Use Value: 36 kW rating handles worst-case 4 kV/2 kA surge generators per IEC 61000-4-5, eliminating need for cascaded protection stages. |
Use Scenario: Shielding trackside signaling equipment power inputs from traction current transients and lightning coupling on rail networks. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), clamping residual energy below 82.4 V. Use Value: Enables Class 4/5 compliance with 42 Ω source impedance, meeting EN 50121-3-2 immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A | Lower peak power (400 W), SMA package, RθJC = 40 °C/W | Not suitable for DO-160G multi-stroke or >100 A surges | Select only for cost-sensitive, low-energy consumer electronics with <10 A IPP requirement |
| SMCJ51A | Higher peak power (1500 W), SMC package, RθJC = 15 °C/W | Lacks AEC-Q101 qualification and DO-160G validation | Acceptable for industrial 48 V systems lacking aviation certification, but requires additional thermal design effort |
Compared with SMAJ51A and SMCJ51A, the MPLAD36KP51A/TR provides 24× higher peak power and 15× lower thermal resistance - enabling single-device protection in space-constrained avionics and automotive modules where cascade designs are prohibited.
Availability
MPLAD36KP51A/TR is available at Aetrix Electronics and suitable for aerospace avionics, automotive 48 V mild hybrid systems, and industrial 48 V DC distribution panels requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MPLAD36KP51A/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
Microchip Technology acquired Microsemi in 2018 and now delivers high-reliability analog, mixed-signal, and power protection solutions for aerospace, defense, and industrial markets.
The MPLAD36KP51A/TR belongs to Microchip's high-power surface-mount TVS family, engineered specifically for DO-160G, ISO 7637-2, and IEC 61000-4-5 compliance in mission-critical power rail protection.
FAQ
What is the maximum peak pulse current rating for MPLAD36KP51A/TR?
The MPLAD36KP51A/TR is rated for 437 A peak impulse current (IPP) at the standardized 10/1000 μs waveform. This value is derived from its 36,000 W peak pulse power rating and 82.4 V clamping voltage (VC), and is validated per IEC 61000-4-5 testing protocols. The device maintains this rating across its full operating temperature range when properly mounted on a thermally optimized PCB.
Is MPLAD36KP51A/TR suitable for bidirectional signal line protection?
No - MPLAD36KP51A/TR is a unidirectional TVS diode, indicated by the "A" suffix (not "CA"). Its cathode is the metal base, and it conducts only during reverse-biased overvoltage events. For bidirectional AC or data-line protection, Microchip offers the MPLAD36KP51CA variant, which provides symmetrical clamping in both polarities.
Does MPLAD36KP51A/TR require pre-reflow baking?
No. MPLAD36KP51A/TR is rated Moisture Sensitivity Level 1 (MSL-1) per IPC/JEDEC J-STD-020D.1, meaning it has unlimited floor life and does not require dry packing or baking before reflow soldering - reducing manufacturing overhead and eliminating moisture-related popcorning risk.
How is thermal management implemented for MPLAD36KP51A/TR?
Thermal management relies on the exposed metal base (cathode) soldered directly to a large copper pour or heatsink. With RθJC = 1.0 °C/W, the device transfers heat efficiently from junction to case. Designers must follow the recommended pad layout (Figure 7) and use ≥2 oz copper on inner layers to achieve rated 504 W dissipation at 100 °C case temperature.
What certifications does MPLAD36KP51A/TR hold?
MPLAD36KP51A/TR is AEC-Q101 qualified for automotive use and validated to RTCA DO-160G Section 22 for multi-stroke lightning (Waveforms 4 and 5A, Levels 4–5). It also meets IEC 61000-4-2/4-4/4-5 for ESD, EFT, and surge immunity, and carries RoHS (e3) compliance with UL94V-0 epoxy encapsulation.
MPLAD36KP51A/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):
- 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
MPLAD36KP51A/TR FAQ
1.How can I place an order for MPLAD36KP51A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP51A/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 MPLAD36KP51A/TR reliable?
The price and inventory of MPLAD36KP51A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP51A/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP51A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP51A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP51A/TR?
MPLAD36KP51A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP51A/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 MPLAD36KP51A/TR?
For technical support, including MPLAD36KP51A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP51A/TR requirements.
6.How does Aetrix verify that MPLAD36KP51A/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP51A/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 MPLAD36KP51A/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP51A/TR?
All MPLAD36KP51A/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP51A/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 MPLAD36KP51A/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP51A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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