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Microchip Technology MPLAD36KP26A
- Part No.:
- MPLAD36KP26A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP26A.pdf
- Description:
- TVS DIODE 26VWM 43VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,363
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Product details
Overview
MPLAD36KP26A 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, features a 26 V reverse standoff voltage (VWM), clamps transients to ≤43.0 V at 838 A, and operates across –55°C to +150°C junction temperature - deployed in lightning-prone avionics and load-dump-protected vehicle ECUs.
For engineers reviewing the MPLAD36KP26A datasheet, MPLAD36KP26A pinout, MPLAD36KP26A application, or MPLAD36KP26A equivalent, key selection criteria include its 26 V VWM rating, 43.0 V max clamping voltage at 838 A IPP, unidirectional polarity, low-profile PLAD package with metal-base cathode, and compliance with RTCA DO-160 Section 22 multi-stroke lightning and IEC 61000-4-5 Class 3 secondary protection.
Technical Context
The MPLAD36KP26A employs a silicon avalanche diode structure optimized for fast response (<100 ps rise time) and high thermal robustness via direct metal-base heat sinking. Its unidirectional configuration enables precise DC-biased rail protection without leakage path concerns during normal operation.
It meets RTCA DO-160F Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 protection up to 78 V standoff variants, with validated performance under 2 Ω, 12 Ω, and 42 Ω source impedances per IEC 61000-4-5 - supporting both short- and long-distance lightning coupling scenarios in aircraft wiring harnesses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 26 V - maximum continuous DC or peak AC voltage the device blocks without conduction; matches 24 V nominal bus systems. |
| V(BR) min/max | 28.9–31.9 V - breakdown initiates within this range at 5 mA, ensuring reliable turn-on before downstream component damage. |
| VC @ IPP | ≤43.0 V at 838 A - clamping voltage limits transient overvoltage seen by protected ICs to safe levels during 10/1000 μs surges. |
| PPP | 36,000 W @ 10/1000 μs - peak power handling capacity enables single-device protection against severe lightning-induced transients. |
| RθJC | 1.0 °C/W - low junction-to-case thermal resistance allows efficient heat transfer to PCB copper or heatsink, critical for multi-pulse reliability. |
| ID @ VWM | ≤10 μA - ultra-low standby leakage preserves battery life and avoids false triggering in always-on systems. |
| TJ Range | –55°C to +150°C - qualified for extended-temperature environments including engine bays and avionics bays. |
Pinout & Package
Package: PLAD - low-profile, void-free thermosetting epoxy body (UL94V-0), metal base cathode termination, tin-lead or RoHS-compliant matte-tin plating, weight ~1.7–2.0 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface) | Transient current entry point during positive surges | Connected to protected line; requires minimum trace inductance routing to preserve clamping speed. |
| Cathode (metal base) | Current return path and primary thermal interface | Must be soldered to large copper pour or heatsink for RθJC = 1.0 °C/W performance; polarity marking on body applies only to unidirectional versions. |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW peak pulse power | Enables single-device protection against RTCA DO-160 Section 22 multi-stroke lightning events without cascaded TVS staging. |
| 1.0 °C/W junction-to-case thermal resistance | Supports >0.05% duty cycle impulse repetition when mounted per recommended pad layout, extending service life in cyclic surge environments. |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints, simplifying SMT assembly logistics and reducing handling cost. |
| AEC-Q101 qualified | Validated for automotive under-hood applications including alternator load dump and ISO 7637-2 pulse 5a/b immunity. |
| IEC 61000-4-2/4-4/4-5 compliance | Provides integrated ESD, EFT, and surge immunity across system-level EMC test suites without supplemental protection components. |
Applications
| Avionics Lightning Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: Protecting ARINC 429 data buses and sensor inputs in commercial aircraft against induced lightning currents per RTCA DO-160 Section 22. IC Role / Device Role / Timing Role: Primary clamping element placed at connector entry points to shunt multi-kA transients before reaching FPGA I/O banks or ADC front-ends. Use Value: 43.0 V clamping ensures protected devices remain below absolute maximum ratings even during 36 kW worst-case stroke simulations. | Use Scenario: Safeguarding 24 V power distribution modules and body control units during alternator field-cutoff events (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS connected between battery rail and ground, absorbing up to 120 V/200 ms transients with <100 ps response. Use Value: 26 V VWM aligns with 24 V nominal systems while allowing margin for ripple and cold-crank dips; 838 A IPP exceeds ISO 7637-2 requirements. |
| Industrial Motor Drive Inputs | Railway Signaling Interface Protection |
Use Scenario: Shielding PLC analog input channels from inductive kickback and switching noise in factory automation cabinets. IC Role / Device Role / Timing Role: Front-end transient suppressor on 0–10 V or 4–20 mA signal lines interfacing with variable-frequency drives. Use Value: Low ID (≤10 μA) prevents loading of high-impedance sensor outputs; 43.0 V VC ensures precision op-amps stay within common-mode range. | Use Scenario: Securing Ethernet-over-coax and RS-485 links in train control signaling systems exposed to traction current surges and lightning coupling. IC Role / Device Role / Timing Role: Line-side TVS on differential pairs, leveraging bidirectional capability (via CA variant) where required, though MPLAD36KP26A serves unidirectional DC bias rails. Use Value: 36 kW rating handles coupled energy from 1 kA/10/1000 μs surges per EN 50121-3-2, maintaining signal integrity during fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ26A | 600 W PPP rating, SMB package, 400 W lower peak power, 38.9 V VC @ 17.3 A IPP | Targeted for board-level ESD/EFT; insufficient for DO-160 lightning or load dump | Select only for low-energy signal-line protection where 36 kW capability is unnecessary. |
| SMCJ26A | 1500 W PPP rating, SMC package, 34.4 V VC @ 43.5 A IPP, higher RθJA (35 °C/W) | Suitable for moderate automotive transients but fails multi-stroke lightning validation | Use where cost or footprint constraints preclude PLAD, but verify thermal derating for repetitive surges. |
Compared with SMBJ26A and SMCJ26A, the MPLAD36KP26A provides 24× and 24× higher peak pulse power respectively, enabling single-point protection against aircraft lightning and automotive load dump - critical where cascade design adds complexity, cost, and failure modes.
Availability
MPLAD36KP26A is available at Aetrix Electronics and suitable for avionics lightning protection, automotive load dump suppression, and industrial motor drive input conditioning requiring stable component supply across extended temperature and high-reliability programs.
Supply support for MPLAD36KP26A 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 expertise in radiation-hardened ICs, timing devices, and power protection.
The MPLAD36KP26A belongs to Microsemi's high-power PLAD-series TVS family, engineered specifically for multi-stroke lightning resilience and automotive-grade surge immunity in mission-critical platforms.
FAQ
What is the clamping voltage of the MPLAD36KP26A under maximum rated surge current?
The MPLAD36KP26A exhibits a maximum clamping voltage (VC) of 43.0 V when subjected to its peak pulse current (IPP) of 838 A under 10/1000 μs waveform conditions. This value is measured per standard test methods and ensures downstream circuitry remains within safe operating voltage limits during severe transients. The MPLAD36KP26A maintains this clamping performance across its full operating temperature range.
Is the MPLAD36KP26A suitable for automotive AEC-Q101 qualification requirements?
Yes, the MPLAD36KP26A is tested and qualified to AEC-Q101 standards for discrete semiconductors, covering stress tests such as HTGB, HTRB, and temperature cycling. Its 26 V VWM, 43.0 V clamping, and 838 A surge capability directly address ISO 7637-2 Pulse 5a/b load dump immunity. The MPLAD36KP26A is documented in Microsemi's AEC-Q101 report for high-reliability automotive power rail protection.
How does the PLAD package of the MPLAD36KP26A improve thermal performance compared to standard SMC or SMB packages?
The PLAD package of the MPLAD36KP26A achieves a junction-to-case thermal resistance (RθJC) of just 1.0 °C/W - significantly lower than typical SMC (≈3.5 °C/W) or SMB (≈15 °C/W) packages - due to its metal-base construction acting as both cathode terminal and primary heat path. This enables efficient conduction cooling into PCB copper or external heatsinks, sustaining multi-pulse reliability. The MPLAD36KP26A leverages this to maintain 36 kW pulse handling without thermal runaway.
Does the MPLAD36KP26A meet RTCA DO-160 Section 22 lightning protection requirements?
Yes, the MPLAD36KP26A is explicitly validated for RTCA DO-160 Section 22 multi-stroke lightning testing, including Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4. Its 36 kW rating, fast <100 ps response, and low clamping voltage ensure compliance when mounted per recommended pad layout. The MPLAD36KP26A appears in Microsemi's DO-160 application guidance for avionics power and data line protection.
What is the polarity configuration and pin identification method for the MPLAD36KP26A?
The MPLAD36KP26A is a unidirectional TVS with cathode on the metal base (bottom side) and anode on the top surface. Polarity is marked on the body with a band or symbol per Microsemi's PLAD nomenclature. No top-side marking indicates cathode-down orientation; the metal base must be soldered to ground or low-impedance return plane. This configuration is confirmed for the MPLAD36KP26A in the RF01216 datasheet revision B.
MPLAD36KP26A 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):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 43V
- Current - Peak Pulse (10/1000µs):
- 838A
- 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
MPLAD36KP26A FAQ
1.How can I place an order for MPLAD36KP26A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP26A 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 MPLAD36KP26A reliable?
The price and inventory of MPLAD36KP26A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP26A is usually 5 days.
3.What payment methods are accepted for MPLAD36KP26A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP26A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP26A?
MPLAD36KP26A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP26A 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 MPLAD36KP26A?
For technical support, including MPLAD36KP26A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP26A requirements.
6.How does Aetrix verify that MPLAD36KP26A is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP26A 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 MPLAD36KP26A meets industry standards.
7.What is the process for return or replacement of MPLAD36KP26A?
All MPLAD36KP26A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP26A, 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 MPLAD36KP26A part is unused and in its original packaging.
Return procedure for MPLAD36KP26A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP26A Tags
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