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Microchip Technology MPLAD36KP75A/TR
- Part No.:
- MPLAD36KP75A/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP75A/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:9,010
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Product details
Overview
MPLAD36KP75A/TR from Microsemi (now Microchip) is a unidirectional surface-mount transient voltage suppressor (TVS) rated for 36,000 W peak pulse power at 10/1000 μs, with 75 V working standoff voltage (VWM), 83.3–92.1 V breakdown voltage (VBR), and 121 V clamping voltage (VC) at 298 A peak impulse current - designed for lightning and load dump protection in aerospace avionics meeting RTCA DO-160 Section 22.
For engineers reviewing the MPLAD36KP75A/TR datasheet, MPLAD36KP75A/TR pinout, MPLAD36KP75A/TR application, or MPLAD36KP75A/TR equivalent, this device delivers verified multi-stroke lightning robustness, AEC-Q101 qualification, RoHS compliance, and low thermal resistance (RθJC = 1.0 °C/W) in a PLAD package optimized for high-power transient suppression on FR4 PCBs.
Technical Context
This TVS diode operates in avalanche breakdown mode to clamp transients above its VWM, delivering sub-100 ps response time for unidirectional operation and maintaining <10 µA standby current at 75 V. Its metal-base cathode construction enables direct thermal coupling to heatsinks, supporting continuous power dissipation up to 504 W at TC = 100 °C.
The device meets IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances) for Class 1–5 secondary lightning protection and RTCA/DO-160G Waveform 4 (6.4/69 μs) Level 4–5 pin injection immunity - validated across –55 °C to +150 °C junction temperature range with ±98 mV/°C temperature coefficient of VBR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V DC - maximum continuous operating voltage before conduction begins; selected to exceed system nominal rail (e.g., 28 V or 70 V aircraft buses). |
| VBR @ IBR = 5 mA | 83.3–92.1 V - guaranteed avalanche onset range; ensures reliable triggering without premature conduction during normal operation. |
| VC @ IPP = 298 A | 121 V - clamped voltage under full-rated 10/1000 μs surge; defines maximum stress imposed on downstream circuitry. |
| PPP | 36,000 W - peak pulse power handling capability at standard 10/1000 μs waveform; enables single-device protection against severe lightning-induced surges. |
| RθJC | 1.0 °C/W - junction-to-case thermal resistance; allows direct mounting to heatsink for sustained energy absorption without thermal runaway. |
| ID @ VWM | ≤10 µA - leakage current at rated standoff; minimizes quiescent power loss and avoids false triggering in high-impedance sensing paths. |
| TJ Range | –55 °C to +150 °C - qualified operating junction temperature; supports deployment in engine bays, avionics bays, and uncontrolled ambient environments. |
Pinout & Package
The MPLAD36KP75A/TR uses the PLAD (Power Leadless Array Device) surface-mount package: a low-profile, thermally enhanced module with a metal base acting as the cathode terminal and molded epoxy body (UL94V-0). Dimensions are 12.7 mm × 10.16 mm × 4.57 mm (L × W × H); weight ≈ 1.8 g. Mounting requires recommended copper pad layout per Figure 7 (datasheet p.10) for optimal thermal conduction and solder joint reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary current return path and thermal interface; must be soldered to large copper pour or heatsink for RθJC = 1.0 °C/W performance. |
| Top Surface Marking Area | Anode | Electrically isolated top surface; connects to protected line via trace; polarity confirmed by "A" suffix (unidirectional) and cathode-down orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - suitable for vehicle ECU and battery management systems. |
| RTCA DO-160G Section 22 compliant | Passes multi-stroke lightning test requirements for commercial aircraft electronics, enabling use in flight-critical power input stages without derating. |
| RoHS-compliant (e3) | Matte-tin plated terminals meet lead-free assembly standards and support reflow profiles up to 260 °C for 10 s without degradation. |
| 3σ lot norm screening on ID | Statistical control of standby leakage ensures batch-to-batch consistency in high-impedance protection circuits where µA-level current matters. |
| Moisture sensitivity Level 1 | No dry pack or baking required prior to SMT assembly - reduces manufacturing overhead and eliminates moisture-related popcorning risk. |
Applications
| Aerospace Power Input Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: 28 V DC power entry on avionics LRUs subjected to DO-160G Waveform 4 (6.4/69 μs) Level 4 lightning-induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy before it reaches DC-DC converters and FPGA power rails. Use Value: Limits clamped voltage to ≤121 V while absorbing 36 kW pulses - preventing damage to MIL-STD-704F-compliant downstream regulators. |
Use Scenario: 12 V/24 V battery-fed ECUs exposed to ISO 7637-2 Pulse 5a (load dump) events up to 60 V/100 ms. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly at connector entry point to shunt surge current away from sensitive analog front-ends. Use Value: Achieves 298 A peak pulse current handling with <100 ps response - faster than MOSFET-based protectors and sufficient for 100 ms load dump tail. |
| Industrial Motor Drive DC Bus Protection | Railway Signaling Interface Protection |
Use Scenario: 750 V DC bus in traction inverters experiencing switching-induced transients from IGBT commutation. IC Role / Device Role / Timing Role: Secondary TVS stage coordinated with MOVs to handle fast-rising edge components of voltage spikes. Use Value: 121 V clamping at 298 A provides precise voltage limiting margin below IGBT VCE(max), reducing snubber losses and improving efficiency. |
Use Scenario: 75 V signaling lines in ERTMS/ETCS Level 2 trackside equipment subjected to IEC 61000-4-5 (42 Ω) Class 4 surges. IC Role / Device Role / Timing Role: Line-end transient suppressor on RS-485 or MVB physical layer interfaces. Use Value: 75 V VWM matches nominal signaling voltage; 10 µA leakage preserves signal integrity on high-impedance differential receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75A | Lower PPP (600 W), DO-214AA package, RθJC ≈ 40 °C/W, no AEC-Q101 or DO-160G validation. | Suitable only for consumer-grade or non-safety-critical industrial I/O protection; cannot replace MPLAD36KP75A/TR in aerospace or automotive primary protection. | Select SMBJ75A only when surge energy is <100 J and thermal budget permits higher junction temperature rise. |
| SMCJ75A | Higher PPP (1500 W), DO-214AB package, RθJC ≈ 15 °C/W, AEC-Q101 qualified but not DO-160G tested. | Valid for automotive ECU inputs per ISO 7637-2, but lacks multi-stroke lightning certification required for avionics. | Choose SMCJ75A for cost-sensitive automotive designs where DO-160G compliance is not mandated. |
Compared with SMBJ75A and SMCJ75A, the MPLAD36KP75A/TR delivers 24× and 24× higher peak power rating respectively, coupled with certified DO-160G and AEC-Q101 qualification - making it the sole option for mission-critical, high-energy transient environments where thermal management and regulatory compliance are non-negotiable.
Availability
MPLAD36KP75A/TR is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain ECUs, industrial motor drives, and railway signaling systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MPLAD36KP75A/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 MPLAD36KP75A/TR belongs to Microsemi's high-power PLAD TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump suppression where thermal robustness and regulatory certification are mandatory.
FAQ
What is the clamping voltage of MPLAD36KP75A/TR at its rated peak pulse current?
The MPLAD36KP75A/TR has a maximum clamping voltage (VC) of 121 V when subjected to its rated peak impulse current (IPP) of 298 A under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and guarantees the upper voltage limit imposed on protected circuitry during worst-case surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is MPLAD36KP75A/TR suitable for bidirectional signal line protection?
No, MPLAD36KP75A/TR is a unidirectional TVS diode, indicated by the "A" suffix (not "CA"). It conducts only when the anode is negative relative to the cathode (metal base), making it appropriate for DC power rail protection but unsuitable for AC or bidirectional data lines. For such applications, select the bidirectional variant MPLAD36KP75CA/TR instead.
Does MPLAD36KP75A/TR require special handling for moisture sensitivity?
No - the MPLAD36KP75A/TR is rated IPC/JEDEC J-STD-020D.1 Moisture Sensitivity Level 1, meaning it can be stored indefinitely at ambient conditions without dry packing or baking prior to reflow soldering. This eliminates moisture-related defects like popcorn cracking and simplifies SMT line integration for high-volume manufacturing.
What thermal interface requirements apply to MPLAD36KP75A/TR mounting?
The MPLAD36KP75A/TR requires direct soldering of its metal base (cathode) to a thermally robust copper pad or heatsink to achieve the specified RθJC = 1.0 °C/W. Per datasheet Figure 7, the recommended pad layout uses ≥250 mm² of 1 oz Cu connected via multiple thermal vias to internal ground planes - failure to implement this results in excessive junction temperature rise and potential thermal runaway during repeated surges.
Can MPLAD36KP75A/TR be used in place of older Microsemi TVS devices like the SMAJ75A?
No - while both share the same 75 V standoff, the MPLAD36KP75A/TR is not a drop-in replacement for SMAJ75A due to fundamental differences: larger PLAD package (12.7 × 10.16 mm vs. SMA's 4.5 × 2.7 mm), 60× higher peak power rating (36 kW vs. 400 W), and distinct thermal mounting requirements. PCB redesign and thermal validation are mandatory for migration.
MPLAD36KP75A/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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 298A
- 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
MPLAD36KP75A/TR FAQ
1.How can I place an order for MPLAD36KP75A/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP75A/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 MPLAD36KP75A/TR reliable?
The price and inventory of MPLAD36KP75A/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP75A/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP75A/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP75A/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP75A/TR?
MPLAD36KP75A/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP75A/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 MPLAD36KP75A/TR?
For technical support, including MPLAD36KP75A/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP75A/TR requirements.
6.How does Aetrix verify that MPLAD36KP75A/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP75A/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 MPLAD36KP75A/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP75A/TR?
All MPLAD36KP75A/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP75A/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 MPLAD36KP75A/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP75A/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP75A/TR Tags
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