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Microchip Technology MPLAD36KP51CAE3
- Part No.:
- MPLAD36KP51CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP51CAE3.pdf
- Description:
- TVS DIODE 51VWM 82.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,326
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Product details
Overview
MPLAD36KP51CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps at ≤82.4 V under 437 A peak impulse current, and features a 51 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (56.7–62.7 V). It is qualified to AEC-Q101 and meets RTCA DO-160F Level 5 pin injection (Waveform 4) and IEC 61000-4-5 Class 5 secondary lightning protection.
For engineers reviewing the MPLAD36KP51CAE3 datasheet, MPLAD36KP51CAE3 pinout, MPLAD36KP51CAE3 application, or MPLAD36KP51CAE3 equivalent, key selection criteria include its bidirectional polarity, low thermal resistance (RθJC = 1.0 °C/W), RoHS-compliant e3 plating, 10 μA standby current at VWM, and compatibility with FR4 PCB mounting per defined pad layout.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry, activating when transient voltage exceeds its breakdown threshold to divert surge current away from downstream components. Its void-free UL94V-0 epoxy package and metal-base cathode construction enable efficient heat dissipation during multi-stroke events such as lightning-induced surges or automotive load dump.
It supports dual-standard compliance: RTCA DO-160F Waveform 4 (6.4/69 μs) at Level 5 up to 300 V standoff, and IEC 61000-4-5 with 42 Ω source impedance for Class 5 (short-distance) applications. Standby leakage is tightly controlled via 3σ lot norm screening on ID.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains single-stroke lightning-level energy without failure |
| Reverse Standoff Voltage (VWM) | 51 V - maximum continuous operating voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 56.7–62.7 V @ 5 mA - defines precise conduction onset threshold for design margining |
| Clamping Voltage (VC) | ≤82.4 V @ 437 A - limits voltage seen by protected ICs during worst-case surge |
| Standby Current (ID) | ≤10 μA @ 51 V - ensures negligible power loss in always-on systems |
| Thermal Resistance (RθJC) | 1.0 °C/W - enables direct heatsink coupling for sustained multi-pulse operation |
| Polarity | Bidirectional - protects against both positive and negative transients without external circuitry |
Pinout & Package
Package: PLAD - low-profile surface-mount thermoset epoxy case (UL94V-0), metal base cathode, dimensions 12.32 × 10.54 × 5.08 mm (L × W × H), weight ~1.85 g. Mounting requires specified FR4 pad layout (A = 11.94 mm, B = 5.85 mm) for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Connects to line/pin requiring protection; symmetric conduction path with cathode |
| Cathode | Transient current return (metal base) | Must be soldered to large copper pour or heatsink for RθJC = 1.0 °C/W performance |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Eliminates need for dual unidirectional devices or polarity-aware layout in AC or floating-bus systems |
| AEC-Q101 qualification | Validates reliability for automotive powertrain and body electronics under temperature cycling and humidity stress |
| RTCA DO-160F Level 5 compliance | Meets stringent airborne equipment surge immunity requirements for commercial and military aircraft |
| Moisture sensitivity Level 1 | Enables standard SMT assembly without dry-packaging or baking, reducing manufacturing overhead |
| e3 RoHS-compliant plating | Matte-tin terminations ensure solderability per MIL-STD-750 Method 2026 and eliminate lead-related compliance risk |
Applications
| Aerospace Avionics Power Input | Automotive DC-DC Converter Input |
|---|---|
Use Scenario: Protection of 28 V aircraft bus inputs against lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point before EMI filter and DC-DC stage. Use Value: Withstands ≥5000 V open-circuit lightning surge (42 Ω source) while limiting voltage to <83 V, preserving downstream PMICs and microcontrollers. |
Use Scenario: Guarding 12 V/24 V automotive DC-DC converter inputs against load dump (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Fast-response parallel shunt that clamps within <5 ns to prevent overvoltage damage during alternator disconnection events. Use Value: Handles 36 kW surge energy without degradation, enabling single-device protection instead of stacked TVS arrays or hybrid solutions. |
| Industrial Motor Drive Control Board | Railway Signaling Interface |
Use Scenario: Shielding PLC I/O power rails from inductive kickback and switching noise in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional suppression across 24 V supply lines feeding optocoupler-isolated digital inputs. Use Value: 10 μA leakage at 51 V standoff prevents false triggering in high-impedance sensing circuits while maintaining fast response. |
Use Scenario: Securing 72 V signaling lines in train control systems against EFT bursts and induced RFI per EN 50121-3-2. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), absorbing residual energy post-GDT crowbar action. Use Value: 82.4 V clamping at 437 A ensures rail voltage stays below 100 V during 4 kV EFT events, protecting FPGA-based logic interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ51CA | Lower PPP (600 W), SMA package, RθJC ≈ 40 °C/W, no AEC-Q101 or DO-160 qualification | Suitable only for consumer-grade or low-energy industrial I/O - not for aerospace or automotive primary protection | Select when cost and board space constrain requirements and surge energy remains <100 J |
| SMCJ51CA | Higher PPP (1500 W), SMC package, RθJC ≈ 15 °C/W, AEC-Q101 qualified but not DO-160 tested | Applicable in automotive ECUs where DO-160 compliance is not mandated, but higher energy than SMBJ is needed | Choose for mid-tier automotive modules needing robustness beyond SMBJ but without full avionics certification |
Compared with SMBJ51CA and SMCJ51CA, the MPLAD36KP51CAE3 provides 24× and 24× higher peak pulse power respectively, certified compliance with aviation and automotive standards, and a thermally optimized metal-base package enabling reliable multi-stroke operation in mission-critical systems.
Availability
MPLAD36KP51CAE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive power electronics, and industrial motor drive applications requiring stable component supply, long-term lifecycle support, and certified surge immunity.
Supply support for MPLAD36KP51CAE3 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 radiation-hardened ICs for aerospace, defense, and industrial markets.
The MPLAD series was developed specifically for high-power, surface-mount transient suppression in safety-critical platforms where multi-stroke lightning resilience and thermal stability are mandatory.
FAQ
What is the clamping voltage of MPLAD36KP51CAE3 at its rated peak pulse current?
The MPLAD36KP51CAE3 has a maximum clamping voltage (VC) of 82.4 V when subjected to its rated peak pulse current of 437 A under 10/1000 μs waveform conditions. This value is measured at the device terminals with proper PCB thermal management per the recommended pad layout, ensuring predictable overvoltage limiting for downstream circuitry.
Is MPLAD36KP51CAE3 suitable for automotive applications requiring AEC-Q101 qualification?
Yes, the MPLAD36KP51CAE3 is explicitly tested and qualified to AEC-Q101 Rev D for stress tests including temperature cycling, humidity bias HAST, and mechanical shock. Its bidirectional architecture and 36 kW surge rating make it appropriate for 12 V/24 V automotive power inputs exposed to load dump and ISO 7637-2 transients.
Does MPLAD36KP51CAE3 meet RTCA DO-160F lightning protection requirements?
Yes, the MPLAD36KP51CAE3 meets RTCA DO-160F Section 22 Level 5 for pin injection (Waveform 4, 6.4/69 μs) and is validated for multi-stroke lightning compliance per DO-160's cumulative heating requirements. Its low RθJC and metal-base construction directly support this certification.
What is the meaning of the "CA" and "E3" suffixes in MPLAD36KP51CAE3?
In MPLAD36KP51CAE3, "CA" denotes bidirectional polarity (as opposed to "A" for unidirectional), and "E3" specifies RoHS-compliant matte-tin plating per JEDEC J-STD-020 moisture sensitivity Level 1. The "E3" suffix confirms lead-free terminations and eliminates dry-pack requirements for SMT processing.
How does the thermal design of MPLAD36KP51CAE3 differ from standard SMC/SMB TVS diodes?
The MPLAD36KP51CAE3 uses a metal-base package where the cathode serves as the primary thermal path, achieving RθJC = 1.0 °C/W - over 15× better than typical SMCJ (≈15 °C/W) or SMBJ (≈40 °C/W) devices. This requires direct soldering of the metal base to a thermal pad or heatsink, not just standard PCB copper traces.
MPLAD36KP51CAE3 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):
- 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:
- 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
MPLAD36KP51CAE3 FAQ
1.How can I place an order for MPLAD36KP51CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP51CAE3 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 MPLAD36KP51CAE3 reliable?
The price and inventory of MPLAD36KP51CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP51CAE3 is usually 5 days.
3.What payment methods are accepted for MPLAD36KP51CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP51CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP51CAE3?
MPLAD36KP51CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP51CAE3 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 MPLAD36KP51CAE3?
For technical support, including MPLAD36KP51CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP51CAE3 requirements.
6.How does Aetrix verify that MPLAD36KP51CAE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP51CAE3 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 MPLAD36KP51CAE3 meets industry standards.
7.What is the process for return or replacement of MPLAD36KP51CAE3?
All MPLAD36KP51CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP51CAE3, 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 MPLAD36KP51CAE3 part is unused and in its original packaging.
Return procedure for MPLAD36KP51CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP51CAE3 Tags
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