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Microchip Technology MPLAD36KP33AE3
- Part No.:
- MPLAD36KP33AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP33AE3.pdf
- Description:
- TVS DIODE 33VWM 53.3VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:9,779
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Product details
Overview
MPLAD36KP33AE3 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive power systems. It delivers 36 kW peak pulse power at 10/1000 μs, features a 33 V reverse standoff voltage (VWM), clamps to ≤53.3 V at 676 A peak pulse current, and operates across –55°C to +150°C junction temperature - enabling robust secondary lightning protection per IEC 61000-4-5 and RTCA DO-160F Waveform 4 Level 4.
For engineers reviewing the MPLAD36KP33AE3 datasheet, MPLAD36KP33AE3 pinout, MPLAD36KP33AE3 application, or MPLAD36KP33AE3 equivalent, this device is selected for high-reliability DC bus protection where low thermal resistance (1.0°C/W junction-to-case), RoHS-compliant matte-tin terminations, and verified multi-stroke surge endurance are critical design requirements.
Technical Context
This TVS diode uses an avalanche breakdown mechanism to clamp transient overvoltages on DC power rails. Its void-free thermosetting epoxy package with metal baseplate provides direct thermal path to PCB copper, achieving RθJC = 1.0°C/W and enabling sustained energy dissipation without thermal runaway under repetitive surges at ≤0.05% duty factor.
It is characterized for operation at 25°C ambient with full derating above 25°C case temperature, supports steady-state power dissipation up to 71 W at TC = 100°C, and meets AEC-Q101 stress testing requirements - confirming suitability for automotive-grade power electronics and avionics subsystems requiring long-term reliability under harsh thermal cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - enables single-event suppression of lightning-induced transients up to Class 5 per RTCA DO-160F Waveform 4. |
| Reverse Standoff Voltage (VWM) | 33 V - matches nominal 28 V aircraft DC systems and 24 V automotive buses without false triggering during normal operation. |
| Clamping Voltage (VC) | ≤53.3 V @ 676 A - limits downstream component stress to safe levels during 42 Ω source impedance IEC 61000-4-5 surges. |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - allows direct mounting to large copper pour or heatsink for stable thermal performance under repeated surges. |
| Operating Temperature Range | –55°C to +150°C - qualified for engine bay, avionics bay, and other high-temperature embedded environments. |
| RoHS Compliance | e3 suffix - lead-free matte-tin plating compliant with IPC/JEDEC J-STD-020B Level 1 moisture sensitivity, no dry pack required. |
Pinout & Package
Package: PLAD (Plastic Leaded Anode Down) - surface-mount, low-profile thermoset epoxy body with exposed metal cathode baseplate (UL94V-0 rated). Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈1.85 g. Cathode terminal is the entire metal base underside; anode is top-side metallization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top-side pad) | Positive input connection point | Soldered to protected line (e.g., 28 V DC bus); forms forward-biased path during negative transients only in bidirectional variants - not active in unidirectional MPLAD36KP33AE3. |
| Cathode (metal baseplate) | Ground reference / clamping return | Must be soldered to large thermal pad (≥11.94 × 5.85 mm recommended) for optimal heat transfer and low-inductance surge return path. |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW peak pulse rating | Validated for multi-stroke lightning events per RTCA DO-160 Section 22, eliminating need for external series impedance in many airframe designs. |
| 1.0°C/W junction-to-case thermal resistance | Enables >90% of surge energy to conduct directly into PCB copper, reducing localized heating and extending device lifetime under cyclic stress. |
| AEC-Q101 qualification | Confirms reliability for automotive load-dump and jump-start scenarios, including temperature cycling, humidity bias, and mechanical shock. |
| Moisture Sensitivity Level 1 | Allows standard SMT reflow without baking or dry-pack handling - reduces manufacturing overhead and avoids moisture-induced popcorning. |
Applications
| Aerospace Power Distribution | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC distribution lines feeding flight-critical sensors and actuators in commercial aircraft. IC Role / Device Role / Timing Role: Primary secondary surge suppressor placed at power entry point of LRUs to meet RTCA DO-160F Waveform 4 Level 4 (6.4/69 μs). Use Value: Clamps transients to ≤53.3 V within <100 ps, preventing latch-up or gate oxide damage in downstream PMICs and microcontrollers. | Use Scenario: Load dump protection on 12 V/24 V battery-fed ECU power inputs subjected to ISO 7637-2 Pulse 5a/b. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to absorb 100 V/350 ms transients. Use Value: Withstands 676 A peak current without degradation, maintaining VWM stability across 1000+ surge cycles per AEC-Q101 test plan. |
| Industrial Motor Drive DC Bus | Railway Signaling Power Supply |
Use Scenario: Surge suppression on 400 V DC link of variable-frequency drives exposed to switching-induced transients and ground potential rise. IC Role / Device Role / Timing Role: High-power TVS mounted directly to heatsink-equipped PCB to shunt IGBT turn-off spikes and regenerative braking surges. Use Value: 36 kW PPP rating handles cumulative energy from repeated 10/1000 μs pulses without thermal runaway, validated at 0.05% duty cycle. | Use Scenario: Protection of 110 V DC signaling power supplies in trackside cabinets subject to induced lightning surges via long cable runs. IC Role / Device Role / Timing Role: Secondary protector installed after primary gas discharge tube (GDT), meeting IEC 61000-4-5 Class 4 with 42 Ω source impedance. Use Value: Clamping voltage ≤53.3 V ensures downstream DC-DC converters remain within absolute maximum ratings during 4 kV surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | 600 W PPP rating, 5.0 mm × 4.5 mm SMB package, RθJC = 15°C/W | Not suitable for multi-stroke lightning or automotive load dump; limited to low-energy ESD/EFT events. | Select SMBJ33A only for cost-sensitive consumer electronics where surge energy is <100 J and thermal management is passive. |
| SMCJ33A | 1500 W PPP rating, 7.1 mm × 6.2 mm SMC package, RθJC = 5.5°C/W | Lacks AEC-Q101 qualification and RTCA DO-160F validation; insufficient for aviation secondary protection. | Choose SMCJ33A for industrial PLC I/O protection where 1.5 kW peak power suffices and MIL-spec screening is not required. |
Compared with SMBJ33A and SMCJ33A, MPLAD36KP33AE3 delivers 24× and 24× higher peak pulse power respectively, with 15× and 5.5× lower thermal resistance - making it the only option qualified for certified aircraft lightning protection and automotive Grade 0 load-dump compliance.
Availability
MPLAD36KP33AE3 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 across extended product lifecycles and high-reliability qualification.
Supply support for MPLAD36KP33AE3 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 Corporation (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 MPLAD series was developed specifically for high-energy transient suppression in safety-critical platforms where multi-stroke surge endurance, low thermal resistance, and AEC-Q101/MIL-PRF-19500 screening are mandatory.
FAQ
What is the clamping voltage of MPLAD36KP33AE3 at its rated peak pulse current?
The MPLAD36KP33AE3 has a maximum clamping voltage (VC) of 53.3 V when subjected to its rated peak pulse current of 676 A under 10/1000 μs waveform conditions. This value is measured at 25°C and defines the upper voltage limit imposed on protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings. The MPLAD36KP33AE3 maintains this clamping performance across its full operating temperature range with documented derating curves.
Is MPLAD36KP33AE3 suitable for automotive load dump protection per ISO 7637-2?
Yes, MPLAD36KP33AE3 is qualified for automotive load dump protection per ISO 7637-2 Pulse 5a/b due to its AEC-Q101 qualification, 36 kW peak pulse power rating, and ability to withstand 676 A peak current. Its 33 V VWM aligns with 24 V system nominal voltages, and its low RθJC of 1.0°C/W ensures thermal stability during repeated 100 V/350 ms transients. The MPLAD36KP33AE3 is explicitly referenced in Microsemi's application guidance for engine control unit power rail protection.
Does MPLAD36KP33AE3 require special PCB layout considerations?
Yes, MPLAD36KP33AE3 requires a dedicated thermal pad per the manufacturer's recommended pad layout (11.94 mm × 5.85 mm minimum) soldered to the metal cathode baseplate. This pad must connect to internal or external copper planes for effective heat dissipation. Trace inductance must be minimized - short, wide traces to adjacent capacitors and ground - to ensure sub-100 ps response time. The MPLAD36KP33AE3 datasheet specifies exact dimensions and thermal vias for optimal performance in high-reliability applications.
What does the 'E3' suffix indicate in MPLAD36KP33AE3?
The 'E3' suffix in MPLAD36KP33AE3 denotes RoHS-compliant matte-tin plating on all terminations, conforming to IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1 - meaning no dry pack or baking is required prior to SMT reflow. This suffix replaces legacy tin-lead finishes and ensures compatibility with lead-free assembly processes while maintaining solderability per MIL-STD-750 Method 2026. The MPLAD36KP33AE3 is fully traceable to wafer and assembly lots per Microsemi's high-reliability screening protocol.
Can MPLAD36KP33AE3 be used in bidirectional configurations?
No, MPLAD36KP33AE3 is a unidirectional TVS diode, as indicated by the 'A' (not 'CA') suffix in its nomenclature. Bidirectional variants use the 'CA' suffix (e.g., MPLAD36KP33CA) and provide symmetrical clamping for AC-coupled or floating signal lines. The MPLAD36KP33AE3 is intended for DC power rail protection where only positive-going transients relative to ground require suppression - its cathode is the metal baseplate, and polarity must be observed during placement to avoid catastrophic failure.
MPLAD36KP33AE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 676A
- 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
MPLAD36KP33AE3 FAQ
1.How can I place an order for MPLAD36KP33AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP33AE3 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 MPLAD36KP33AE3 reliable?
The price and inventory of MPLAD36KP33AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP33AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD36KP33AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP33AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP33AE3?
MPLAD36KP33AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP33AE3 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 MPLAD36KP33AE3?
For technical support, including MPLAD36KP33AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP33AE3 requirements.
6.How does Aetrix verify that MPLAD36KP33AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP33AE3 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 MPLAD36KP33AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD36KP33AE3?
All MPLAD36KP33AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP33AE3, 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 MPLAD36KP33AE3 part is unused and in its original packaging.
Return procedure for MPLAD36KP33AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP33AE3 Tags
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