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Microchip Technology MPLAD36KP18AE3
- Part No.:
- MPLAD36KP18AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP18AE3.pdf
- Description:
- TVS DIODE 18VWM 30.8VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:2,726
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Product details
Overview
MPLAD36KP18AE3 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 18 V reverse standoff voltage (VWM), clamps transients to ≤30.8 V at 1169 A IPP, and operates across –55°C to +150°C junction temperature.
For engineers reviewing the MPLAD36KP18AE3 datasheet, MPLAD36KP18AE3 pinout, MPLAD36KP18AE3 application, or MPLAD36KP18AE3 equivalent, this device is selected for lightning-level secondary protection per IEC 61000-4-5 (42 Ω, 12 Ω, 2 Ω source impedances), RTCA DO-160F Waveform 4 & 5A pin injection immunity, and automotive load dump suppression where low thermal resistance (RθJC = 1.0 °C/W) and RoHS-compliant e3 plating are required.
Technical Context
This TVS diode uses an avalanche breakdown mechanism to clamp fast-rising transients, with a specified breakdown voltage range of 20.0–22.1 V at 5 mA test current and a maximum clamping voltage of 30.8 V at 1169 A peak pulse current. Its unidirectional polarity places the cathode on the metal baseplate, enabling direct thermal coupling to PCB copper or heatsinks.
It meets AEC-Q101 stress testing requirements and supports MIL-PRF-19500 upscreening options (M/MA/MXL levels). The device achieves Level 4/5 pin injection protection per RTCA/DO-160F and Class 1–5 secondary lightning immunity under IEC 61000-4-5, depending on source impedance and distance criteria.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - enables single-device protection against multi-stroke lightning surges per RTCA DO-160 Section 22. |
| Reverse Standoff Voltage (VWM) | 18 V - sets maximum continuous operating voltage; must exceed system DC bus or signal rail peak voltage. |
| Clamping Voltage (VC) | ≤30.8 V @ IPP = 1169 A - defines maximum voltage seen by protected circuit during worst-case surge event. |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - allows efficient heat transfer to PCB copper pour or external heatsink, critical for repetitive surge duty. |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - eliminates dry-pack requirement and floor-life constraints for SMT assembly. |
| RoHS Compliance | e3 designation - matte-tin plating compliant with EU RoHS Directive 2011/65/EU and lead-free reflow profiles. |
| Standby Current (ID) | ≤60 μA @ VWM - ensures negligible leakage impact on low-power or battery-backed circuits. |
Pinout & Package
Package: PLAD (Plastic Low-profile Anode-down) surface-mount package with metal baseplate cathode termination. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈ 1.7–2.0 g. Cathode is the exposed metal baseplate; anode is top-side metallization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Baseplate (bottom) | Cathode | Primary thermal path and high-current return node; must be soldered to large copper area or heatsink for RθJC = 1.0 °C/W performance. |
| Top-Side Metallization | Anode | Signal/power input terminal; connects to line being protected; requires controlled-impedance trace routing for fast transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile thermally enhanced PLAD package | Enables high-power surge suppression in space-constrained layouts while maintaining RθJC = 1.0 °C/W for reliable multi-pulse operation. |
| RTCA DO-160F Waveform 4 & 5A compliance | Validated for Level 4 (14–400 V variants) and Level 5 (14–300 V variants) pin injection immunity-critical for avionics interface protection. |
| IEC 61000-4-5 secondary lightning protection | Class 1–5 certified across 2 Ω, 12 Ω, and 42 Ω source impedances-supports design to multiple aircraft and industrial surge test levels. |
| AEC-Q101 qualified | Passes automotive-grade reliability stress tests including HTGB, HTRB, and temperature cycling-suitable for under-hood and EV powertrain use. |
| Wafer and assembly lot traceability | Supports full supply chain visibility and failure analysis for high-reliability programs in aerospace and defense applications. |
Applications
| Aircraft Avionics Interface Protection | Automotive 12 V Load Dump Suppression |
|---|---|
Use Scenario: Protecting ARINC 429 data lines, sensor inputs, and power distribution modules in commercial aircraft against DO-160 Section 22 lightning-induced transients. IC Role / Device Role / Timing Role: Primary clamping element placed directly at connector entry point to limit surge energy before it reaches downstream ASICs or FPGAs. Use Value: Achieves Level 5 pin injection immunity (Waveform 4, 6.4/69 μs) and Class 5 lightning protection (42 Ω, short-distance) without external heatsinking. |
Use Scenario: Safeguarding engine control units (ECUs), body control modules (BCMs), and infotainment systems during alternator load dump events in 12 V automotive electrical systems. IC Role / Device Role / Timing Role: Unidirectional TVS connected between battery rail and ground to clamp 120 V/400 ms transients to safe levels for 3.3 V/5 V logic supplies. Use Value: Withstands ≥1169 A peak current and dissipates 36 kW surge energy while maintaining clamping voltage ≤30.8 V-prevents latch-up or burnout of downstream regulators. |
| Industrial Motor Drive DC Bus Protection | Railway Signaling Power Input Protection |
Use Scenario: Shielding IGBT gate drivers and MCU power rails in variable-frequency drives (VFDs) from switching-induced transients and inductive kickback. IC Role / Device Role / Timing Role: Mounted directly across DC bus terminals to absorb repetitive 10/1000 μs surges generated by contactor switching or regenerative braking. Use Value: Thermal resistance of 1.0 °C/W enables stable operation under 0.05% duty cycle surges; RθJA = 50 °C/W supports convection-cooled PCB mounting. |
Use Scenario: Securing 72 V or 110 V DC signaling power inputs in railway trackside electronics against induced surges from nearby traction currents and lightning coupling. IC Role / Device Role / Timing Role: Installed at power entry filter stage to clamp IEC 61000-4-5 Class 4 surges (42 Ω, long-distance) to <30.8 V before LC filtering and DC/DC conversion. Use Value: Validated for Class 4 immunity at 130 V standoff (MPLAD36KP130CA), making MPLAD36KP18AE3 suitable for lower-voltage auxiliary rails with margin for aging and tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Lower PPP rating (600 W), SMA package, RθJC ≈ 40 °C/W, VWM = 18 V, VC = 29.2 V @ 20.9 A. | Only suitable for low-energy transients (e.g., ESD, EFT); cannot meet DO-160 lightning or load dump requirements. | Select SMBJ18A only for cost-sensitive consumer or non-safety-critical industrial designs with sub-1 kA surge exposure. |
| SMCJ18A | PPP = 1500 W, SMC package, RθJC ≈ 15 °C/W, VWM = 18 V, VC = 29.2 V @ 51.3 A. | Supports moderate automotive transients but lacks DO-160F Waveform 4/5A validation and fails IEC 61000-4-5 Class 4/5 testing. | Choose SMCJ18A for legacy automotive ECUs where full lightning compliance is not mandated and PCB space permits larger footprint. |
Compared with SMBJ18A and SMCJ18A, the MPLAD36KP18AE3 provides 24× and 24× higher peak pulse power respectively, validated clamping performance under aviation and industrial lightning standards, and a thermally optimized package enabling sustained multi-stroke operation without derating.
Availability
MPLAD36KP18AE3 is available at Aetrix Electronics and suitable for aerospace avionics interface protection, automotive 12 V load dump suppression, and industrial motor drive DC bus protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for MPLAD36KP18AE3 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 ICs for aerospace, defense, and industrial markets.
The MPLAD36KP18AE3 belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection in safety-critical platforms where thermal robustness, AEC-Q101 qualification, and DO-160F compliance are mandatory.
FAQ
What is the clamping voltage specification for MPLAD36KP18AE3 under standard test conditions?
The MPLAD36KP18AE3 has a maximum clamping voltage (VC) of 30.8 V when subjected to its rated peak pulse current (IPP) of 1169 A using the 10/1000 μs waveform. This value is measured at the device terminals with proper PCB layout per the recommended pad dimensions and is guaranteed across the full operating temperature range of –55°C to +150°C.
Does MPLAD36KP18AE3 meet automotive qualification standards?
Yes, the MPLAD36KP18AE3 is tested and qualified to AEC-Q101 for stress reliability, covering high-temperature reverse bias, high-temperature operating life, and temperature cycling. It is widely deployed in automotive powertrain and chassis modules requiring robust load dump protection, though system-level validation per ISO 7637-2 remains the responsibility of the end designer.
How is polarity identified on the MPLAD36KP18AE3 package?
The MPLAD36KP18AE3 is a unidirectional TVS diode with cathode on the exposed metal baseplate (bottom side) and anode on the top-side metallization. No polarity marking appears on the body; orientation is defined mechanically-cathode must be connected to system ground or the lower-potential rail to ensure correct clamping behavior during positive transients.
Can MPLAD36KP18AE3 be used for bidirectional surge protection?
No, the MPLAD36KP18AE3 is strictly unidirectional. For bidirectional protection, Microsemi offers the MPLAD36KP18CA variant (with CA suffix), which provides symmetrical clamping for AC-coupled or floating signal lines. Using the unidirectional MPLAD36KP18AE3 in bidirectional configurations risks catastrophic failure during negative-going transients.
What thermal management guidance applies to MPLAD36KP18AE3 in high-duty-cycle applications?
For repetitive surges, the MPLAD36KP18AE3 requires thermal coupling of its metal baseplate to ≥250 mm² of 2-oz copper on inner or outer PCB layers. Derating curves in Figure 3 show that at 100°C case temperature, steady-state power dissipation drops to 71 W; pulsed operation beyond 0.05% duty factor demands active cooling or reduced IPP limits per MicroNote 134.
MPLAD36KP18AE3 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):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 30.8V
- Current - Peak Pulse (10/1000µs):
- 1169A (1.169kA)
- 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
MPLAD36KP18AE3 FAQ
1.How can I place an order for MPLAD36KP18AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP18AE3 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 MPLAD36KP18AE3 reliable?
The price and inventory of MPLAD36KP18AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP18AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD36KP18AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP18AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP18AE3?
MPLAD36KP18AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP18AE3 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 MPLAD36KP18AE3?
For technical support, including MPLAD36KP18AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP18AE3 requirements.
6.How does Aetrix verify that MPLAD36KP18AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP18AE3 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 MPLAD36KP18AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD36KP18AE3?
All MPLAD36KP18AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP18AE3, 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 MPLAD36KP18AE3 part is unused and in its original packaging.
Return procedure for MPLAD36KP18AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP18AE3 Tags
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onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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