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Microchip Technology MPLAD36KP14A
- Part No.:
- MPLAD36KP14A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP14A.pdf
- Description:
- TVS DIODE 14VWM 24VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:3,666
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Product details
Overview
MPLAD36KP14A 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 transients to ≤24.0 V at 3000 A, and features a 14 V reverse standoff voltage (VWM), 15.6–17.2 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 MPLAD36KP14A datasheet, MPLAD36KP14A pinout, MPLAD36KP14A application, or MPLAD36KP14A equivalent, key selection criteria include its 36 kW surge rating, unidirectional polarity with cathode-on-base configuration, low-profile thermoset epoxy package (12.32 × 10.54 × 5.08 mm), and compliance with AEC-Q101 and MIL-PRF-19500 screening options.
Technical Context
The MPLAD36KP14A operates as a silicon avalanche diode-based TVS, leveraging controlled breakdown behavior to shunt high-current transients away from sensitive downstream circuitry. Its unidirectional construction provides forward conduction only during negative-going surges relative to the cathode (metal base), with clamping initiated at V(BR) ≥15.6 V and sustained up to VC ≤24.0 V at IPP = 3000 A.
Thermal management is enabled by direct metal-base mounting on PCB copper pads, achieving RθJC = 1.0 °C/W and supporting steady-state dissipation of 71 W at TC = 100°C. It meets IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (lightning) with 42 Ω, 12 Ω, and 2 Ω source impedances - validated for Class 5 multi-stroke lightning per RTCA DO-160F Waveform 5A (40/120 μs).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - enables single-event suppression of aircraft load dump and automotive ISO 7637-2 pulses without failure |
| Reverse Standoff Voltage (VWM) | 14 V - sets maximum continuous operating voltage before leakage exceeds 5 μA; matches 12 V nominal bus systems with margin |
| Breakdown Voltage (V(BR)) | 15.6–17.2 V @ 5 mA - defines precise turn-on threshold for reliable clamping onset across temperature and lot variation |
| Clamping Voltage (VC) | ≤24.0 V @ 3000 A - limits downstream voltage stress to safe levels for 15–24 V logic and power ICs |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - allows direct heat transfer to PCB copper, supporting >70 W steady-state dissipation when mounted on heatsinked pad |
| Surge Current (IPP) | 3000 A @ 10/1000 μs - validates capability to survive multiple RTCA DO-160 Level 5 lightning strokes |
| Moisture Sensitivity Level | Level 1 (per J-STD-020B) - eliminates dry-pack requirement and reflow concerns for standard SMT assembly |
Pinout & Package
Package: Surface-mount void-free thermosetting epoxy case (UL94V-0), metal base cathode termination, dimensions 12.32 × 10.54 × 5.08 mm (A1 × A2 × D), weight ~1.7–2.0 g. Cathode is electrically connected to the metal base (bottom side); anode is top-side metallization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary current return path and thermal interface; must be soldered to large copper pour for thermal performance |
| Top Metallization | Anode | Input terminal for transient energy; connects to protected line (e.g., 12 V rail or signal line) |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW Peak Pulse Power Rating | Validated for multi-stroke lightning per RTCA DO-160 Section 22 - supports full aircraft system certification without external heatsinking |
| Low Junction-to-Case Thermal Resistance | 1.0 °C/W enables >70 W steady-state power handling when mounted on 2 oz copper with thermal vias - reduces need for discrete heatsinks |
| RoHS Compliant (e3) Construction | Tin-plated terminals meet MIL-STD-750 Method 2026 - ensures compatibility with lead-free reflow profiles and long-term solder joint reliability |
| AEC-Q101 Qualified | Qualified for automotive underhood applications including engine control modules and battery management systems - validated for -55°C to +150°C operation |
| Traceable Wafer & Assembly Lots | Full lot traceability supports AS9100 and IATF 16949 production requirements - critical for aerospace OEM and Tier-1 automotive programs |
Applications
| Aerospace Avionics Power Protection | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC power inputs in flight control computers against lightning-induced surges per RTCA DO-160F Waveform 5A. IC Role / Device Role / Timing Role: Primary secondary surge clamp on main power rail, activated within <100 ps of overvoltage onset. Use Value: Enables compliance with Level 5 lightning immunity without derating or parallel devices - verified at 3000 A peak current. | Use Scenario: Safeguarding 12 V supply lines in diesel ECU modules exposed to ISO 7637-2 load dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed upstream of LDO regulators and microcontrollers to limit input voltage to ≤24 V. Use Value: Withstands 36 kW surges while maintaining VWM = 14 V - matches 12 V nominal bus with headroom for ripple and tolerance. |
| Industrial Motor Drive DC Bus | Railway Signaling Power Input |
Use Scenario: Clamping regenerative braking spikes on 24 V DC bus of servo drives in factory automation systems. IC Role / Device Role / Timing Role: Fast-response avalanche diode suppressing 10/1000 μs transients induced by IGBT switching and inductive kickback. Use Value: 1.0 °C/W RθJC allows direct PCB thermal coupling - eliminates need for mechanical fasteners or thermal interface materials. | Use Scenario: Secondary surge protection on 72 V DC signaling power inputs in EN 50121-4-compliant railway trackside equipment. IC Role / Device Role / Timing Role: Bidirectional-capable family member (MPLAD36KP14CA) used in differential pair protection; this unidirectional variant applied to single-ended rails. Use Value: Validated for IEC 61000-4-5 Class 4 with 2 Ω source impedance - ensures survivability of repeated 130 A surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14A | 600 W PPP rating, 5.0 mm × 4.5 mm SMB package, RθJA = 40 °C/W - lacks multi-stroke lightning validation | Consumer-grade industrial controls; not qualified for DO-160 or AEC-Q101 | Select when cost sensitivity outweighs aerospace/automotive qualification requirements and surge energy is <1 kJ |
| SMCJ14A | 1500 W PPP rating, 7.1 mm × 6.2 mm SMC package, RθJC = 2.5 °C/W - lower thermal performance and no RTCA DO-160F Level 5 data | Mid-tier automotive body electronics; insufficient for engine bay or avionics | Choose for legacy designs requiring footprint compatibility with SMC outline, but verify clamping margin at 3000 A is acceptable |
Compared with SMBJ14A and SMCJ14A, the MPLAD36KP14A delivers 24× and 24× higher peak pulse power respectively, validated clamping at 3000 A, and full DO-160F Level 5 and AEC-Q101 qualification - making it the only option for certified aerospace and high-reliability automotive power rail protection.
Availability
MPLAD36KP14A is available at Aetrix Electronics and suitable for aerospace avionics, automotive engine control units, and industrial motor drive systems requiring stable component supply with full traceability and extended lifecycle support.
Supply support for MPLAD36KP14A 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 components for aerospace, defense, and industrial markets.
The MPLAD36KP14A belongs to Microsemi's PLAD high-power TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump suppression in safety-critical power systems.
FAQ
What is the clamping voltage of the MPLAD36KP14A at its rated peak pulse current?
The MPLAD36KP14A has a maximum clamping voltage (VC) of 24.0 V when subjected to its rated peak pulse current of 3000 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01216 Rev B datasheet and ensures downstream 24 V-rated ICs remain within safe operating limits during surge events. The MPLAD36KP14A maintains this clamping performance across its qualified temperature range of –55°C to +150°C.
Is the MPLAD36KP14A RoHS compliant and what plating does it use?
Yes, the MPLAD36KP14A is RoHS compliant (designated by "e3" in the nomenclature) and uses annealed matte-tin plating on its terminals, which meets MIL-STD-750 Method 2026 for solderability. This plating ensures reliable lead-free reflow processing and long-term intermetallic stability. The MPLAD36KP14A's RoHS compliance is confirmed in the RF01216 Rev B datasheet section "Mechanical and Packaging" and applies to all standard production lots.
How is polarity configured on the MPLAD36KP14A and where is the cathode located?
The MPLAD36KP14A is a unidirectional TVS with the cathode electrically connected to the metal base (bottom side of the package), as explicitly stated in the RF01216 Rev B datasheet: "The cathode is the metal base under the body of this device." The anode is the top-side metallization. This configuration requires the metal base to be soldered to the ground or return plane, and the top terminal to connect to the line being protected - ensuring correct avalanche conduction during negative transients.
Does the MPLAD36KP14A meet AEC-Q101 qualification and what tests were performed?
Yes, the MPLAD36KP14A is AEC-Q101 qualified, as confirmed in the RF01216 Rev B datasheet header. Qualification includes temperature cycling, highly accelerated stress test (HAST), unbiased highly accelerated stress test (uHAST), and surge testing per AEC-Q101-004. These tests validate reliability for automotive underhood applications, including engine control units and battery management systems operating from –55°C to +150°C ambient.
What is the thermal resistance from junction to ambient (RθJA) for the MPLAD36KP14A and how is it achieved?
The MPLAD36KP14A has a junction-to-ambient thermal resistance (RθJA) of 50 °C/W when mounted on an FR4 PCB with the recommended pad layout per RF01216 Rev B. This value assumes a specific copper area and via pattern; actual RθJA improves significantly when the metal base is soldered to a large thermal pad with multiple thermal vias. For design purposes, the more critical parameter is RθJC = 1.0 °C/W, which enables predictable thermal modeling when the device is heatsinked to the PCB plane.
MPLAD36KP14A 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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 24V
- Current - Peak Pulse (10/1000µs):
- 1500A (1.5kA)
- 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
MPLAD36KP14A FAQ
1.How can I place an order for MPLAD36KP14A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP14A 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 MPLAD36KP14A reliable?
The price and inventory of MPLAD36KP14A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP14A is usually 5 days.
3.What payment methods are accepted for MPLAD36KP14A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP14A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP14A?
MPLAD36KP14A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP14A 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 MPLAD36KP14A?
For technical support, including MPLAD36KP14A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP14A requirements.
6.How does Aetrix verify that MPLAD36KP14A is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP14A 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 MPLAD36KP14A meets industry standards.
7.What is the process for return or replacement of MPLAD36KP14A?
All MPLAD36KP14A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP14A, 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 MPLAD36KP14A part is unused and in its original packaging.
Return procedure for MPLAD36KP14A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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