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Microchip Technology MPLAD36KP24A
- Part No.:
- MPLAD36KP24A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP24A.pdf
- Description:
- TVS DIODE 24VWM 39.8VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:8,258
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Product details
Overview
MPLAD36KP24A from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power systems. It delivers 36 kW peak pulse power at 10/1000 μs, clamps transients to ≤39.8 V at 905 A, and features a 24 V reverse standoff voltage (VWM) with 26.7–29.5 V breakdown range - enabling robust secondary lightning protection per IEC 61000-4-5 and RTCA DO-160F Waveform 4 Level 4.
For engineers reviewing the MPLAD36KP24A datasheet, MPLAD36KP24A pinout, MPLAD36KP24A application, or MPLAD36KP24A equivalent, this device is selected for high-reliability DC bus protection where low thermal resistance (1.0 °C/W junction-to-case), RoHS-compliant tin plating, and MIL-PRF-19500 upscreening options are required in space-constrained SMT layouts.
Technical Context
This TVS diode operates as a clamping-type overvoltage protector, triggered by avalanche breakdown above its specified V(BR) range. Its metal-base cathode construction enables direct thermal coupling to PCB copper or heatsinks, supporting sustained multi-stroke surge handling under ≤0.05% duty cycle per IEC 61000-4-5 test conditions.
It meets AEC-Q101 stress testing requirements and supports secondary lightning protection across multiple source impedances (2 Ω, 12 Ω, 42 Ω), with validated performance at 905 A IPP and 39.8 V VC - critical for aircraft avionics power inputs and 24 V vehicle ECUs exposed to load dump events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains single-stroke lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 24 V - maximum continuous DC operating voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 26.7–29.5 V @ 5 mA - defines precise avalanche onset threshold for predictable turn-on |
| Clamping Voltage (VC) | 39.8 V @ 905 A - limits downstream circuit voltage during worst-case surge |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to PCB copper or external heatsink |
| Standby Leakage Current (ID) | 10 μA @ 24 V - negligible power loss in standby, critical for battery-backed systems |
| Surge Rating Standard | IEC 61000-4-5 (42 Ω source), RTCA DO-160F Waveform 4 Level 4 - certified for aircraft-grade immunity |
Pinout & Package
Package: PLAD - void-free thermosetting epoxy body (UL94V-0), metal base cathode terminal, RoHS-compliant matte-tin plating, weight ~1.7–2.0 g. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface pad) | Transient current entry point | Connected to protected line; carries full surge current into device |
| Cathode (metal base) | Transient current return path | Direct thermal and electrical interface to PCB ground plane or heatsink; must be soldered to ≥100 mm² copper area |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMT package | Enables placement on dense power supply PCBs without height clearance issues (max 5.33 mm) |
| Wafer and assembly lot traceability | Supports full-batch traceability for aerospace and defense programs requiring AS9100 compliance |
| MIL-PRF-19500 upscreening option | Enables qualification for high-reliability applications including satellite power subsystems |
| Moisture sensitivity level 1 | Eliminates dry-pack requirement and bake-out prior to reflow, reducing manufacturing cost and risk |
| AEC-Q101 qualified | Validated for automotive under-hood environments including temperature cycling and humidity exposure |
Applications
| Aircraft Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC input of flight management computers against induced lightning transients per RTCA DO-160F Section 22. IC Role / Device Role / Timing Role: Primary clamping TVS placed directly at connector entry point to shunt >900 A surges before reaching DC/DC converters. Use Value: Clamps to 39.8 V while dissipating 36 kW, preventing latch-up or burnout of downstream regulators rated for 40 V absolute max. | Use Scenario: Safeguarding 24 V supply rail of diesel engine ECU against ISO 7637-2 load dump pulses up to 60 V/100 ms. IC Role / Device Role / Timing Role: Secondary surge protector after primary TVS, absorbing residual energy not handled by front-end protection. Use Value: Withstands 905 A peak current and maintains <10 μA leakage, ensuring no impact on ECU sleep-mode current budget. |
| Industrial Motor Drive DC Bus | Railway Signaling Power Supply |
Use Scenario: Shielding 24 V auxiliary power in variable-frequency drives from switching-induced RFI and inductive kickback. IC Role / Device Role / Timing Role: Fast-response clamping element across DC bus rails to suppress sub-100 ns transients from IGBT commutation. Use Value: Sub-5 ns response time and 1.0 °C/W thermal resistance prevent thermal runaway during repeated 10/1000 μs surges in factory automation environments. | Use Scenario: Securing 24 V backup power in track-side signaling controllers against lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: IEC 61000-4-5 Class 4 compliant protector (42 Ω source) mounted at cabinet entry point. Use Value: Validated clamping performance at 39.8 V ensures PLC I/O modules remain within safe operating area 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 |
|---|---|---|---|
| SMBJ24A | 600 W PPP rating, 38.9 V VC @ 15.7 A - 60× lower power handling | Only suitable for low-energy ESD/EFT; cannot meet DO-160F Level 4 or IEC 61000-4-5 Class 4 | Select only for board-level ESD protection where surge energy is <10 J |
| SMCJ24A | 1500 W PPP rating, 38.9 V VC @ 38.9 A - 24× lower peak power than MPLAD36KP24A | Lacks validation for multi-stroke lightning or RTCA DO-160F Waveform 4; no MIL-PRF-19500 screening path | Acceptable for commercial-grade 24 V systems with basic IEC 61000-4-2/4-4 compliance needs |
Compared with SMBJ24A and SMCJ24A, the MPLAD36KP24A provides 36 kW surge capacity, certified multi-stroke lightning resilience, and military-grade upscreening - making it the sole choice for aviation, rail, and high-reliability industrial DC bus protection where single-event failure is unacceptable.
Availability
MPLAD36KP24A is available at Aetrix Electronics and suitable for aircraft avionics, automotive ECU power conditioning, and industrial motor drive DC bus protection requiring stable component supply across extended production lifecycles.
Supply support for MPLAD36KP24A 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) designs high-reliability semiconductor solutions for aerospace, defense, communications, and industrial markets, with emphasis on radiation-hardened ICs, timing devices, and power protection components.
The MPLAD36KP24A belongs to Microsemi's high-power PLAD-series TVS family, engineered specifically for multi-stroke lightning and load dump protection in safety-critical 24 V DC systems where thermal management and long-term reliability are paramount.
FAQ
What is the clamping voltage of MPLAD36KP24A at its rated peak pulse current?
The MPLAD36KP24A has a maximum clamping voltage (VC) of 39.8 V at 905 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01216 datasheet and ensures downstream 40 V-rated components remain within safe operating limits during surge events. The MPLAD36KP24A achieves this clamping performance while maintaining low thermal resistance for repeatable multi-stroke operation.
Is MPLAD36KP24A suitable for automotive applications requiring AEC-Q101 qualification?
Yes, the MPLAD36KP24A is tested and qualified to AEC-Q101 standards for discrete semiconductors, covering stress tests such as temperature cycling, humidity bias, and mechanical shock. Its unidirectional construction, 24 V VWM rating, and 905 A surge capability make it appropriate for 24 V automotive ECUs exposed to load dump and ISO 7637-2 transients. The MPLAD36KP24A also supports optional MIL-PRF-19500 screening for enhanced automotive safety integrity levels.
How does the PLAD package of MPLAD36KP24A improve thermal performance compared to standard SMC packages?
The PLAD package of MPLAD36KP24A uses a metal base cathode that serves as both electrical terminal and thermal conduction path, achieving 1.0 °C/W junction-to-case thermal resistance - over 5× better than typical SMC packages (~5–6 °C/W). This allows the MPLAD36KP24A to dissipate 36 kW surges without excessive junction temperature rise when mounted on ≥100 mm² copper. The MPLAD36KP24A's low RθJC enables reliable operation under repeated surge duty cycles where standard SMC devices would fail thermally.
Does MPLAD36KP24A meet RTCA DO-160F lightning protection requirements?
Yes, the MPLAD36KP24A is explicitly validated for RTCA DO-160F Section 22 lightning-induced transient susceptibility, including Waveform 4 (6.4/69 μs) at Level 4 up to 400 V VWM variants. For the MPLAD36KP24A, this translates to verified protection against 4 kV pin-injection transients at 25°C with appropriate derating. Its 36 kW rating and fast response ensure compliance without additional series impedance - a key requirement for aircraft avionics power inputs where the MPLAD36KP24A is commonly deployed.
What is the polarity configuration and mounting orientation requirement for MPLAD36KP24A?
The MPLAD36KP24A is a unidirectional TVS diode with cathode on the metal base (bottom surface) and anode on the top metallized pad. Correct orientation requires the metal base to be soldered directly to a large PCB ground plane or heatsink - not insulated - to ensure both electrical return path and thermal dissipation. The MPLAD36KP24A's polarity marking is indicated on the top surface per package drawing, and reverse mounting will prevent proper clamping and may cause catastrophic failure during surge events.
MPLAD36KP24A 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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 39.8V
- Current - Peak Pulse (10/1000µs):
- 905A
- 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
MPLAD36KP24A FAQ
1.How can I place an order for MPLAD36KP24A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP24A 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 MPLAD36KP24A reliable?
The price and inventory of MPLAD36KP24A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP24A is usually 5 days.
3.What payment methods are accepted for MPLAD36KP24A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP24A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP24A?
MPLAD36KP24A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP24A 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 MPLAD36KP24A?
For technical support, including MPLAD36KP24A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP24A requirements.
6.How does Aetrix verify that MPLAD36KP24A is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP24A 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 MPLAD36KP24A meets industry standards.
7.What is the process for return or replacement of MPLAD36KP24A?
All MPLAD36KP24A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP24A, 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 MPLAD36KP24A part is unused and in its original packaging.
Return procedure for MPLAD36KP24A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP24A Tags
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