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Microchip Technology MPLAD36KP40CA/TR
- Part No.:
- MPLAD36KP40CA/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP40CA/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:6,342
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Product details
Overview
MPLAD36KP40CA/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 40 V working standoff voltage (VWM), 44.4–49.1 V breakdown voltage (VBR), and 64.5 V clamping voltage (VC) at 559 A peak impulse current - designed for secondary lightning protection in avionics per RTCA DO-160 Section 22 and IEC 61000-4-5.
For engineers reviewing the MPLAD36KP40CA/TR datasheet, MPLAD36KP40CA/TR pinout, MPLAD36KP40CA/TR application, or MPLAD36KP40CA/TR equivalent, this device delivers verified multi-stroke surge handling, AEC-Q101 qualification, RoHS compliance, and low thermal resistance (RθJC = 1.0 °C/W) in a PLAD package optimized for high-power board-level ESD/EFT and load dump protection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection against reverse-polarity transients without external polarity management. Its low clamping ratio (VC/VWM ≈ 1.61) and sub-5 ns response time ensure fast voltage limiting during fast-rising surges such as RTCA DO-160 Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs).
The PLAD package features a metal base acting as the cathode terminal for unidirectional variants and as the common reference for bidirectional operation, with thermal resistance junction-to-case of 1.0 °C/W enabling effective heat transfer to PCB copper pads. It supports steady-state power dissipation up to 504 W at 100 °C case temperature under derated conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 36,000 W at 10/1000 μs - enables single-device protection against severe lightning-induced surges per IEC 61000-4-5 Class 4/5 and RTCA DO-160 Level 4/5. |
| Working Standoff Voltage (VWM) | 40 V - sets maximum continuous operating voltage before conduction; selected to exceed nominal 28 V aircraft bus peaks. |
| Clamping Voltage (VC) | 64.5 V at IPP = 559 A - limits downstream voltage stress during worst-case surge, preserving connected ICs and sensors. |
| Breakdown Voltage (VBR) | 44.4–49.1 V at IBR = 5 mA - defines onset of avalanche conduction; tight tolerance ensures predictable turn-on behavior. |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - allows efficient heat extraction to PCB heatsink pads, critical for sustained multi-pulse reliability in avionics systems. |
| Temperature Coefficient (αVBR) | 44 mV/°C - quantifies VBR drift over temperature; used to validate margin at max operating junction temperature (+150 °C). |
| AEC-Q101 Qualified | Yes - confirms suitability for automotive powertrain and chassis applications requiring validated reliability under temperature cycling and humidity exposure. |
Pinout & Package
The MPLAD36KP40CA/TR uses the PLAD (Power Leadless Array Device) surface-mount package: a low-profile, thermally enhanced molded epoxy body with a metal base acting as the common terminal for bidirectional operation. Dimensions are 10.3 × 8.7 × 3.2 mm (L × W × H); weight ≈ 1.8 g. Cathode marking is not applicable for bidirectional CA variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 (Anode-side pad) | Anode connection (bidirectional) | One side of symmetrical avalanche junction; forms half of differential surge path with Terminal 2. |
| Terminal 2 (Cathode-side pad) | Cathode connection (bidirectional) | Second side of symmetrical junction; completes low-inductance, balanced conduction path for ± transients. |
| Metal base (underside) | Thermal & electrical common | Integral heat spreader and low-impedance return path; must be soldered to large copper pour for RθJC = 1.0 °C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional construction (CA suffix) | Enables symmetrical ±40 V standoff and identical clamping in both directions - eliminates need for polarity-aware layout in DC bus protection. |
| 36 kW surge rating at 10/1000 μs | Validated for multi-stroke lightning events per RTCA DO-160 Section 22 - supports >1000 surges at 0.05% duty cycle without degradation. |
| AEC-Q101 qualification | Confirms reliability under automotive-grade temperature cycling (-40 °C to +125 °C), mechanical shock, and humidity testing - suitable for engine control and ADAS modules. |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints per IPC/JEDEC J-STD-020D.1 - simplifies SMT assembly and inventory management. |
| RθJC = 1.0 °C/W | Enables direct thermal coupling to PCB copper; achieves 504 W steady-state dissipation at TC = 100 °C - critical for high-duty-cycle industrial inverters. |
Applications
| Aircraft Power Distribution Units | Automotive 24 V Battery Management Systems |
|---|---|
Use Scenario: Protection of 28 V DC distribution panels against lightning-induced surges per RTCA DO-160G Section 22 Waveform 4 and 5A. IC Role / Device Role / Timing Role: Primary bidirectional clamping device placed at bus entry point, shunting transients before they reach upstream regulators and controllers. Use Value: Withstands Level 5 pin injection (Waveform 5A) up to 300 V VWM, and for MPLAD36KP40CA/TR specifically, provides 64.5 V clamping at 559 A - ensuring downstream 40 V-rated components remain within safe operating area. |
Use Scenario: Load dump and jump-start transient suppression on 24 V battery rails in commercial vehicles and off-highway equipment. IC Role / Device Role / Timing Role: High-energy TVS placed directly across battery input to clamp ISO 7637-2 Pulse 5a/b transients up to 120 V. Use Value: Delivers 36,000 W peak power handling and 40 V VWM - matching nominal 28 V system while exceeding ISO 7637-2 requirements for 120 V/100 ms pulses. |
| Industrial Motor Drive DC Link Protection | Renewable Energy Solar Inverter Input Stage |
Use Scenario: Surge protection on DC link capacitors subjected to switching transients and grid-side lightning coupling in variable-frequency drives. IC Role / Device Role / Timing Role: Bidirectional clamping element mounted across DC+ and DC− terminals to limit voltage overshoot during IGBT turn-off. Use Value: Sub-5 ns response and 1.0 °C/W RθJC enable rapid energy diversion and thermal stability during repetitive 10 kHz switching surges - preventing capacitor overvoltage failure. |
Use Scenario: Secondary surge protection on PV string inputs exposed to induced lightning surges per IEC 61000-4-5 with 2 Ω source impedance. IC Role / Device Role / Timing Role: Class 4-compliant TVS installed between PV+ and PV− before MPPT controller input stage. Use Value: Validated for IEC 61000-4-5 Class 4 with 2 Ω source (up to 130 V VWM); MPLAD36KP40CA/TR's 40 V rating targets 48 V nominal strings - providing 2× margin over open-circuit voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40CA | Lower peak power (600 W), smaller SMB package, higher RθJA (65 °C/W), no AEC-Q101 qualification. | Suitable only for low-energy ESD/EFT; cannot meet RTCA DO-160 Level 4/5 or IEC 61000-4-5 Class 4/5. | Select when cost and board space constrain design and surge threat level is limited to IEC 61000-4-2/4-4. |
| SMCJ40CA | Higher peak power (1500 W), larger SMC package, RθJC = 2.5 °C/W, AEC-Q101 qualified but not DO-160 tested. | Meets IEC 61000-4-5 Class 3, but lacks multi-stroke validation for avionics; insufficient for DO-160 Section 22. | Select for automotive or industrial applications requiring AEC-Q101 and 1.5 kW surge handling where DO-160 compliance is not required. |
Compared with SMBJ40CA and SMCJ40CA, the MPLAD36KP40CA/TR uniquely combines 36 kW surge capability, DO-160G Section 22 certification, AEC-Q101 qualification, and 1.0 °C/W thermal resistance - making it the only option for high-reliability, multi-stroke avionics and heavy-duty automotive load dump protection where board-level thermal management and regulatory compliance are non-negotiable.
Availability
MPLAD36KP40CA/TR is available at Aetrix Electronics and suitable for aircraft power distribution units, automotive 24 V battery management systems, and industrial motor drive DC link protection requiring stable component supply, long-term lifecycle support, and traceable sourcing for safety-critical designs.
Supply support for MPLAD36KP40CA/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 MPLAD36KP series belongs to Microsemi's high-power TVS portfolio, engineered specifically for multi-stroke lightning and load dump protection in mission-critical systems where thermal performance, regulatory compliance, and long-term reliability are mandatory.
FAQ
What is the clamping voltage of the MPLAD36KP40CA/TR at its rated peak pulse current?
The MPLAD36KP40CA/TR has a maximum clamping voltage (VC) of 64.5 V at 559 A peak pulse current (IPP) under the standard 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that downstream circuitry remains below 65 V during worst-case surge events - critical for protecting 40 V-rated power management ICs and microcontrollers in avionics and automotive systems.
Is the MPLAD36KP40CA/TR certified for RTCA DO-160 Section 22 lightning testing?
Yes, the MPLAD36KP40CA/TR is explicitly validated for RTCA DO-160G Section 22 multi-stroke lightning testing, including Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs). The datasheet confirms Level 4 and Level 5 compliance for VWM up to 300 V, and MPLAD36KP40CA/TR's 40 V rating falls within the supported range for full qualification - making it suitable for primary surge protection in aircraft power interfaces.
Does the MPLAD36KP40CA/TR require special PCB layout considerations for thermal performance?
Yes - to achieve the specified RθJC = 1.0 °C/W, the MPLAD36KP40CA/TR must be mounted on a minimum 25 mm² copper pad (1 oz Cu) connected to internal ground/power planes via ≥4 thermal vias. The datasheet specifies exact pad dimensions and layout in Figure 7; inadequate copper area increases junction temperature and reduces surge endurance, especially during repetitive multi-pulse events.
How does the bidirectional construction of the MPLAD36KP40CA/TR affect its circuit placement?
The bidirectional construction of the MPLAD36KP40CA/TR means it functions identically for positive and negative transients, so it can be placed directly across any two nodes needing symmetrical protection - such as PV+ to PV− in solar inverters or battery+ to battery− in 24 V systems. Unlike unidirectional TVS diodes, no polarity orientation check is needed during placement, reducing assembly errors and enabling simplified layout for DC bus protection.
What is the maximum steady-state power dissipation of the MPLAD36KP40CA/TR at 100 °C case temperature?
The MPLAD36KP40CA/TR supports a steady-state power dissipation (PD) of 504 W at 100 °C case temperature, as specified in Table 3 of the datasheet. This high value relies on optimal thermal mounting - specifically, soldering the metal base to a large copper heatsink area. At 25 °C ambient, PD drops to 2.51 W, reflecting its design focus on transient, not continuous, power handling.
MPLAD36KP40CA/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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 559A
- 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
MPLAD36KP40CA/TR FAQ
1.How can I place an order for MPLAD36KP40CA/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP40CA/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 MPLAD36KP40CA/TR reliable?
The price and inventory of MPLAD36KP40CA/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP40CA/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP40CA/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP40CA/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP40CA/TR?
MPLAD36KP40CA/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP40CA/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 MPLAD36KP40CA/TR?
For technical support, including MPLAD36KP40CA/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP40CA/TR requirements.
6.How does Aetrix verify that MPLAD36KP40CA/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP40CA/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 MPLAD36KP40CA/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP40CA/TR?
All MPLAD36KP40CA/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP40CA/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 MPLAD36KP40CA/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP40CA/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP40CA/TR Tags
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