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Microchip Technology MPLAD36KP300A
- Part No.:
- MPLAD36KP300A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP300A.pdf
- Description:
- TVS DIODE 300VWM 483VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:3,850
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Product details
Overview
MPLAD36KP300A 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, clamps at ≤483 V under 75 A peak impulse current, and features a 300 V reverse standoff voltage (VWM), 333–369 V breakdown voltage (V(BR)), and 1.0 °C/W junction-to-case thermal resistance - enabling robust secondary lightning protection per RTCA DO-160 Section 22 and IEC 61000-4-5.
For engineers reviewing the MPLAD36KP300A datasheet, MPLAD36KP300A pinout, MPLAD36KP300A application, or MPLAD36KP300A equivalent, key selection criteria include its 300 V VWM rating, unidirectional polarity, low-profile PLAD package with metal-base cathode, and compliance with AEC-Q101, MIL-PRF-19500 screening options, and RTCA/DO-160F Waveform 4 Level 5 pin injection requirements.
Technical Context
This TVS diode operates as a clamping device in DC power rails and signal lines, triggered by overvoltage transients exceeding its 300 V standoff threshold. Its silicon avalanche structure provides fast response (<100 ps rise time), low clamping ratio (VC/V(BR) ≈ 1.45), and stable breakdown with ±0.05 %/°C temperature coefficient.
It is rated for 36,000 W peak pulse power at 10/1000 μs, supports steady-state dissipation up to 71 W at TC = 100°C, and achieves thermal management via direct metal-base mounting on heatsinks - validated per FR4 PCB pad layout with RθJC = 1.0 °C/W and RθJA = 50 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 300 V - maximum continuous operating voltage before clamping begins; sets minimum system rail margin for 28 V or 270 V aircraft buses. |
| V(BR) @ I(BR) | 333–369 V - verified avalanche onset range at 5 mA; ensures predictable turn-on without premature conduction. |
| VC @ IPP | 483 V max at 75 A - clamping voltage during 10/1000 μs surge; defines worst-case protected circuit voltage stress. |
| PPP | 36,000 W - peak pulse power handling capability; meets RTCA DO-160 Section 22 multi-stroke lightning test levels. |
| RθJC | 1.0 °C/W - junction-to-case thermal resistance; enables direct heatsink mounting for sustained energy absorption. |
| ID @ VWM | 10 μA max - standby leakage at 300 V; minimizes quiescent power loss in always-on avionics subsystems. |
| Package | PLAD - low-profile surface-mount package with metal base cathode; optimized for thermal conduction and mechanical reliability. |
Pinout & Package
The MPLAD36KP300A uses a 2-terminal PLAD package with the cathode electrically connected to the exposed metal base (bottom side), and the anode accessible via the top-side metallized pad. Mounting requires thermal interface to a heatsink or copper pour per recommended pad layout (A = 0.470", B = 0.230", C = 0.100").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top pad) | Transient current entry point | Connected to protected line; carries full surge current into avalanche junction. |
| Cathode (metal base) | Current return path & thermal interface | Must be soldered to heatsink or large copper area; serves as primary thermal conduction path and ground reference. |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW peak pulse rating | Validated per 10/1000 μs waveform; enables single-device protection against severe load dump and lightning-induced surges. |
| RTCA DO-160F Waveform 4 Level 5 compliance | Withstands 6.4/69 μs pin-injection transients up to 300 V VWM devices - critical for flight-critical avionics I/O protection. |
| AEC-Q101 qualified | Qualified for automotive powertrain and chassis applications requiring high-reliability transient suppression. |
| Moisture sensitivity Level 1 | No dry pack or baking required prior to reflow; simplifies SMT assembly and reduces process risk. |
| MIL-PRF-19500 upscreening option | Enables high-reliability screening (M, MA, MX, MXL levels) for space-grade and military programs with traceable lot data. |
Applications
| Avionics Power Bus Protection | Automotive 24 V Load Dump Suppression |
|---|---|
Use Scenario: Protecting 270 V DC distribution panels in commercial aircraft against induced lightning transients per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed across main bus input to divert >30 kA surges within <100 ps. Use Value: Enables compliance with Class 5 lightning protection using a single surface-mount component with metal-base thermal coupling to chassis ground. | Use Scenario: Safeguarding engine control units (ECUs) during alternator load dump events in heavy-duty trucks with 24 V systems. IC Role / Device Role / Timing Role: Primary clamping element on battery feed line, activated within nanoseconds when voltage exceeds 300 V. Use Value: Absorbs 36 kW surge energy without degradation, eliminating need for bulky discrete MOVs or hybrid protection networks. |
| Industrial 270 V DC Rail Protection | Railway Signaling Interface Protection |
Use Scenario: Securing programmable logic controller (PLC) power inputs in industrial automation systems exposed to switching transients from contactors and VFDs. IC Role / Device Role / Timing Role: Standoff-rated TVS suppressing repetitive 1–5 ms transients up to 300 V peak while maintaining <10 μA leakage. Use Value: Provides long-term reliability with 3σ lot norm screening on ID and full surge testing per batch - reducing field failure risk. | Use Scenario: Shielding trackside signaling electronics from EFT bursts and ESD per IEC 61000-4-2/4-4 during maintenance or lightning proximity. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional variant used in differential pair protection with common-mode choke integration. Use Value: Delivers 483 V clamping at 75 A while meeting IEC 61000-4-5 Class 3 (42 Ω source) requirements for safety-critical infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ300A | 600 W PPP rating, SMB package, RθJC ≈ 15 °C/W, VWM = 300 V, VC = 488 V @ 1.23 A | Lower energy handling; suitable only for low-repetition, sub-kW transients - not compliant with DO-160 Section 22. | Select SMBJ300A only for cost-sensitive industrial controls where surge severity is limited and thermal mass is constrained. |
| SMCJ300A | 1500 W PPP rating, SMC package, RθJC ≈ 3.5 °C/W, VWM = 300 V, VC = 486 V @ 3.1 A | Insufficient for multi-stroke lightning; lacks RTCA DO-160F Waveform 4 Level 5 validation and AEC-Q101 qualification. | Choose SMCJ300A for automotive body electronics with moderate load dump exposure but no flight certification requirement. |
Compared with SMBJ300A and SMCJ300A, the MPLAD36KP300A delivers 24× and 24× higher peak pulse power respectively, supports direct metal-base heatsinking for sustained duty cycles, and is uniquely validated for aviation lightning standards - making it irreplaceable in certified airborne systems.
Availability
MPLAD36KP300A is available at Aetrix Electronics and suitable for avionics power distribution, automotive 24 V load dump protection, and industrial 270 V DC rail applications requiring stable component supply, long-lifecycle support, and traceable high-reliability sourcing.
Supply support for MPLAD36KP300A 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 radiation-hardened solutions for aerospace, defense, and industrial markets.
The MPLAD36KP300A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection in certified aircraft systems and harsh-environment automotive power electronics.
FAQ
What is the clamping voltage specification for MPLAD36KP300A under standard test conditions?
The MPLAD36KP300A has a maximum clamping voltage (VC) of 483 V at 75 A peak pulse current under 10/1000 μs waveform conditions. This value is measured per Figure 3 in RF01216 Rev B and defines the upper voltage limit imposed on protected circuits during surge events. The clamping performance remains stable across temperature due to tight V(BR) tolerance (333–369 V) and low temperature coefficient (±0.05 %/°C).
Does MPLAD36KP300A meet RTCA DO-160F lightning protection requirements?
Yes, the MPLAD36KP300A is validated for RTCA DO-160F Section 22 multi-stroke lightning testing and Waveform 4 (6.4/69 μs) pin injection at Level 5 for 300 V VWM devices. Its 36 kW peak pulse rating, low clamping ratio, and metal-base thermal design enable compliance without external heatsink augmentation - a key requirement for certified avionics installations.
How is thermal management implemented for MPLAD36KP300A in high-power applications?
The MPLAD36KP300A relies on its metal-base cathode for thermal conduction, achieving RθJC = 1.0 °C/W when mounted on a heatsink or large copper pour per the specified pad layout (A = 0.470", B = 0.230"). This allows safe dissipation of 71 W at TC = 100°C. Unlike plastic-packaged TVS diodes, the PLAD package eliminates thermal bottlenecks between junction and ambient - critical for repeated surge events.
Is MPLAD36KP300A RoHS compliant and what is its moisture sensitivity level?
Yes, the MPLAD36KP300A is RoHS compliant (e3 marking) and classified as Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B - meaning it can be stored indefinitely at ambient conditions and requires no dry pack or baking before reflow soldering. This simplifies manufacturing logistics and eliminates moisture-related popcorning risks during assembly.
What screening options are available for MPLAD36KP300A in high-reliability programs?
MPLAD36KP300A supports optional upscreening per MIL-PRF-19500, including M, MA, MX, and MXL reliability levels with full wafer and assembly lot traceability. These options include extended temperature cycling, burn-in, and 3σ lot norm screening on standby current (ID). Screening documentation and conformance reports are provided per Hirel Non-Hermetic Product Portfolio guidelines.
MPLAD36KP300A 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):
- 300V
- Voltage - Breakdown (Min):
- 333V
- Voltage - Clamping (Max) @ Ipp:
- 483V
- Current - Peak Pulse (10/1000µs):
- 75A
- 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
MPLAD36KP300A FAQ
1.How can I place an order for MPLAD36KP300A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP300A 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 MPLAD36KP300A reliable?
The price and inventory of MPLAD36KP300A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP300A is usually 5 days.
3.What payment methods are accepted for MPLAD36KP300A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP300A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP300A?
MPLAD36KP300A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP300A 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 MPLAD36KP300A?
For technical support, including MPLAD36KP300A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP300A requirements.
6.How does Aetrix verify that MPLAD36KP300A is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP300A 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 MPLAD36KP300A meets industry standards.
7.What is the process for return or replacement of MPLAD36KP300A?
All MPLAD36KP300A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP300A, 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 MPLAD36KP300A part is unused and in its original packaging.
Return procedure for MPLAD36KP300A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP300A Tags
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