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Microchip Technology MPLAD36KP40A/TR
- Part No.:
- MPLAD36KP40A/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP40A/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:9,540
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Product details
Overview
MPLAD36KP40A/TR from Microsemi (now Microchip) 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 ≤64.5 V at 559 A, and features a 40 V working standoff voltage (VWM) with 44.4–49.1 V breakdown range (VBR). It is qualified to AEC-Q101 and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MPLAD36KP40A/TR datasheet, MPLAD36KP40A/TR pinout, MPLAD36KP40A/TR application, or MPLAD36KP40A/TR equivalent, this device is selected for high-reliability DC bus protection where low thermal resistance (RθJC = 1.0 °C/W), fast clamping (<100 ps), and RoHS-compliant PLAD package integration are critical.
Technical Context
This TVS operates in avalanche breakdown mode to shunt high-current transients away from sensitive downstream circuitry. Its metal-base cathode construction enables direct thermal coupling to PCB copper or heatsinks, supporting sustained power dissipation up to 504 W at TC = 100 °C.
The device exhibits a temperature coefficient of breakdown voltage (αV(BR)) of +44 mV/°C and maintains <10 µA standby current (ID) at 40 V, ensuring minimal leakage in always-on systems. It is surge-tested per IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances) and validated for pin-injection protection per RTCA/DO-160G Waveforms 4 and 5A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 μs) | 36,000 W - Enables single-device protection against severe lightning-induced surges without cascaded stages. |
| Working Standoff Voltage (VWM) | 40 V - Matches nominal 36 V automotive or industrial DC bus systems with margin for ripple and tolerance. |
| Clamping Voltage (VC @ IPP) | 64.5 V max at 559 A - Limits downstream voltage stress below 65 V during worst-case surge events. |
| Breakdown Voltage (VBR) | 44.4–49.1 V @ 5 mA - Ensures reliable turn-on before system overvoltage damage occurs. |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - Allows efficient heat transfer to external heatsink or large copper pour, critical for repeated surge duty. |
| Clamping Response Time | <100 ps - Provides near-instantaneous suppression of fast-rising ESD and switching transients. |
| AEC-Q101 Qualified | Yes - Validated for automotive under-hood and powertrain applications requiring extended temperature and life-cycle reliability. |
Pinout & Package
The MPLAD36KP40A/TR uses the PLAD (Power Leadless Array Device) surface-mount package: a low-profile, thermally enhanced, void-free epoxy-molded case with exposed metal cathode base (pin 1) and anode terminal on top surface. Total weight is ~1.8 g. Pad layout follows Figure 7 in the datasheet with recommended FR4 mounting pad for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary thermal path and high-current return node; must be soldered to large copper area or heatsink. |
| Top Surface Terminal | Anode | Connects to protected line (e.g., battery rail); forms series path with cathode for unidirectional clamping. |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW Surge Rating (10/1000 μs) | Supports single-point protection for aircraft avionics power inputs meeting RTCA DO-160 Section 22 Level 3–5. |
| Low RθJC = 1.0 °C/W | Enables >500 W steady-state power handling when mounted on heatsink, extending surge endurance in repetitive fault conditions. |
| AEC-Q101 Qualification | Validates robustness for automotive 12 V/24 V/48 V systems including load dump (ISO 7637-2 Pulse 5a/b) and cold-crank scenarios. |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints-supports standard SMT reflow without baking. |
| RoHS-compliant (e3) | Meets global environmental compliance mandates without compromising surge performance or thermal reliability. |
Applications
| Aerospace Power Distribution | Automotive Battery Management |
|---|---|
Use Scenario: Protection of 28 V DC distribution buses in commercial aircraft against lightning-induced surges per RTCA DO-160G Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS diode clamping transient energy before it reaches upstream converters and downstream avionics loads. Use Value: Achieves Level 4/5 pin-injection immunity (Waveform 4, 6.4/69 μs) and multi-stroke survivability without derating or parallel devices. |
Use Scenario: Load-dump protection on 24 V battery-fed ECUs in heavy-duty trucks and off-highway vehicles. IC Role / Device Role / Timing Role: Fast-acting shunt element that clamps ISO 7637-2 Pulse 5a (110 V, 400 ms) transients to safe levels within nanoseconds. Use Value: Prevents MOSFET gate oxide failure and microcontroller latch-up by limiting clamped voltage to ≤64.5 V at 559 A peak. |
| Industrial DC Motor Drives | Railway Signaling Power Supplies |
Use Scenario: Input-stage surge suppression on 48 V DC bus feeding variable-frequency drives in factory automation systems. IC Role / Device Role / Timing Role: Primary transient protector placed ahead of input rectifiers and bulk capacitors to absorb inductive kickback and grid-switching spikes. Use Value: Handles 36 kW pulses without degradation, enabling >100,000 surge cycles per MIL-STD-750 Method 2074 testing. |
Use Scenario: Secondary lightning protection for 110 V DC signaling power supplies in European railway infrastructure (EN 50121-4 compliant). IC Role / Device Role / Timing Role: Standoff-rated TVS deployed at equipment boundary to limit induced surges from nearby lightning strikes (IEC 61000-4-5, 42 Ω source). Use Value: Supports Class 5 protection (short-distance coupling) with verified clamping at 64.5 V, reducing need for additional MOV stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A (onsemi) | Lower peak power (600 W), higher clamping voltage (64.5 V @ 9.9 A), SMB package with RθJA = 110 °C/W. | Suitable only for low-energy transients (e.g., ESD, EFT); not rated for DO-160 lightning or load dump. | Select only for cost-sensitive consumer-grade designs with sub-1 kA surge exposure. |
| SMCJ40A (Littelfuse) | Higher peak power (1500 W), same VWM/VC, but SMC package limits thermal dissipation (RθJC ≈ 3.5 °C/W vs. 1.0 °C/W). | Acceptable for automotive load dump if board-level heatsinking is sufficient; fails DO-160 multi-stroke validation. | Use where footprint compatibility with legacy SMC layouts is required, but verify thermal margin at 100+ surge repetitions. |
Compared with SMBJ40A and SMCJ40A, the MPLAD36KP40A/TR delivers 24× and 24× higher peak power respectively, with superior thermal management enabling repeatable lightning strike survival-making it the only option for certified aerospace and high-end automotive safety-critical rails.
Availability
MPLAD36KP40A/TR is available at Aetrix Electronics and suitable for aerospace power distribution, automotive battery management, and industrial DC motor drives requiring stable component supply across long production lifecycles and stringent environmental qualification.
Supply support for MPLAD36KP40A/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 radiation-hardened solutions for aerospace, defense, and industrial markets.
The MPLAD36KP40A/TR belongs to Microsemi's high-power PLAD TVS family, engineered specifically for mission-critical surge protection where thermal robustness, multi-stroke endurance, and aviation-standard compliance are non-negotiable.
FAQ
What is the maximum clamping voltage of the MPLAD36KP40A/TR at its rated peak pulse current?
The MPLAD36KP40A/TR has a maximum clamping voltage (VC) of 64.5 V at its rated peak pulse current (IPP) of 559 A under the 10/1000 μs waveform. This value is guaranteed per Table 4 in the datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The MPLAD36KP40A/TR achieves this while maintaining sub-100 ps response time, making it suitable for protecting fast-switching power semiconductors.
Is the MPLAD36KP40A/TR compatible with lead-free reflow soldering processes?
Yes, the MPLAD36KP40A/TR supports lead-free reflow soldering with a peak temperature of 260 °C for 10 seconds, as specified in Table 3 of the datasheet. Its RoHS-compliant (e3) matte-tin plating and UL94V-0 epoxy body ensure compatibility with standard JEDEC J-STD-020D.1 profiles. No pre-baking is required due to its moisture sensitivity level (MSL) 1 rating.
Does the MPLAD36KP40A/TR meet RTCA DO-160G Section 22 lightning test requirements?
Yes, the MPLAD36KP40A/TR is explicitly validated for RTCA DO-160G Section 22 multi-stroke lightning testing across Levels 3–5. Its 36 kW rating, low RθJC, and fast response enable full compliance without derating. The datasheet confirms Level 4/5 pin-injection immunity for Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs), making MPLAD36KP40A/TR appropriate for primary and secondary aircraft power protection.
How does the thermal performance of the MPLAD36KP40A/TR compare to standard SMB/SMC TVS diodes?
The MPLAD36KP40A/TR offers a junction-to-case thermal resistance (RθJC) of just 1.0 °C/W-over 3× lower than typical SMC packages (~3.5 °C/W) and >100× better than SMB packages (~110 °C/W). This allows MPLAD36KP40A/TR to dissipate >500 W continuously at TC = 100 °C when mounted on a heatsink, whereas SMBJ40A or SMCJ40A would thermally saturate well below 10 W under the same conditions.
Can the MPLAD36KP40A/TR be used in bidirectional configurations?
No, the MPLAD36KP40A/TR is a unidirectional TVS diode, indicated by the "A" suffix (vs. "CA" for bidirectional variants like MPLAD36KP40CA/TR). Its polarity is fixed: cathode on the metal base, anode on the top surface. For AC or dual-polarity rail protection, a discrete pair of unidirectional devices or a dedicated bidirectional part must be used-MPLAD36KP40A/TR alone cannot clamp negative transients.
MPLAD36KP40A/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):
- 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
MPLAD36KP40A/TR FAQ
1.How can I place an order for MPLAD36KP40A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP40A/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 MPLAD36KP40A/TR reliable?
The price and inventory of MPLAD36KP40A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP40A/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP40A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP40A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP40A/TR?
MPLAD36KP40A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP40A/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 MPLAD36KP40A/TR?
For technical support, including MPLAD36KP40A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP40A/TR requirements.
6.How does Aetrix verify that MPLAD36KP40A/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP40A/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 MPLAD36KP40A/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP40A/TR?
All MPLAD36KP40A/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP40A/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 MPLAD36KP40A/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP40A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP40A/TR Tags
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