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Microchip Technology MPLAD18KP30AE3
- Part No.:
- MPLAD18KP30AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP30AE3.pdf
- Description:
- TVS DIODE 30VWM 48.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:3,910
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Product details
Overview
MPLAD18KP30AE3 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 18,000 W peak pulse power at 10/1000 μs, clamps at ≤48.4 V under 372 A peak impulse current, and features a 30 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (33.3–36.8 V). It is RoHS-compliant (e3), AEC-Q101 qualified, and optimized for lightning protection per RTCA DO-160 Section 22 and IEC 61000-4-5.
For engineers reviewing the MPLAD18KP30AE3 datasheet, MPLAD18KP30AE3 pinout, MPLAD18KP30AE3 application, or MPLAD18KP30AE3 equivalent, key selection criteria include its 30 V VWM rating, 48.4 V max clamping voltage at 372 A, thermal resistance of 0.7 °C/W junction-to-case, 12.3–12.6 mm × 5.1–5.3 mm footprint, and metal-base cathode polarity configuration for low-inductance PCB mounting.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry, triggering into avalanche conduction when transient voltage exceeds its breakdown threshold (V(BR)). Its low RθJC (0.7 °C/W) enables efficient heat transfer to an external heatsink or copper plane, supporting multi-stroke surge endurance under ≤0.05% duty factor per IEC 61000-4-5 and RTCA DO-160F Waveform 4/5A testing.
It is constructed using silicon avalanche technology in a void-free thermosetting epoxy package with tin-lead or matte-tin plating, rated for -55°C to +150°C operation. The cathode is electrically connected to the metal baseplate - requiring direct thermal and electrical connection to PCB ground plane - and exhibits <100 ps response time from 0 V to V(BR) min.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V maximum continuous reverse operating voltage - sets upper limit for DC or peak AC bus voltage before clamping initiates |
| V(BR) @ I(BR) | 33.3–36.8 V at test current - defines precise avalanche onset range for reliable overvoltage detection |
| VC @ IPP | ≤48.4 V at 372 A peak pulse - ensures downstream ICs see no more than 48.4 V during worst-case 10/1000 μs surge |
| PPP @ 10/1000 μs | 18,000 W - supports single-event lightning-level energy absorption without failure |
| RθJC | 0.7 °C/W - enables effective thermal coupling to heatsink or large copper pour for sustained multi-pulse operation |
| ID @ VWM | ≤10 μA - guarantees negligible leakage current at rated standoff, critical for low-power sensor or control circuits |
| Package | Surface-mount metal-base package (12.3–12.6 mm × 5.1–5.3 mm) - provides mechanical robustness and low-inductance path to ground |
Pinout & Package
Package: Surface-mount plastic case with exposed metal baseplate (cathode terminal); dimensions 12.3–12.6 mm × 5.1–5.3 mm × 10.5–10.8 mm (L × W × H); UL94V-0 compliant epoxy body; cathode marked on bottom metal surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top metallization) | Transient input node | Connected to protected line (e.g., 24 V rail, antenna feed, CAN bus); carries full surge current into device |
| Cathode (metal baseplate) | Ground reference / heat sink interface | Must be soldered directly to large copper area or heatsink; serves dual role as low-inductance return path and primary thermal dissipation surface |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW peak pulse power rating | Enables compliance with RTCA DO-160 Section 22 multi-stroke lightning tests without derating or parallel devices |
| 0.7 °C/W junction-to-case thermal resistance | Allows >10× higher steady-state power handling vs. standard SMD TVS when mounted on ≥25 cm² copper pour |
| Cathode-on-baseplate construction | Reduces parasitic inductance below 1 nH - critical for sub-100 ns transient suppression in RF front-ends and high-speed data lines |
| AEC-Q101 qualification | Validates reliability for automotive 12 V/24 V power net applications including load dump and jump-start events |
| RoHS-compliant e3 finish | Meets global environmental compliance requirements without sacrificing solderability or thermal performance |
Applications
| Aerospace Avionics Power Protection | Automotive 24 V Load Dump Suppression |
|---|---|
Use Scenario: Protecting flight control sensors and communication modules on commercial aircraft against induced lightning transients per RTCA DO-160F Section 22. IC Role / Device Role / Timing Role: Primary clamping element placed at power entry point of LRUs, shunting >15 kA surges within <100 ps to prevent latch-up or gate oxide damage in downstream regulators and FPGAs. Use Value: Eliminates need for series ferrites or secondary TVS stages due to 18 kW single-device capability and metal-base thermal path enabling >5000 surge cycles. | Use Scenario: Safeguarding engine control units (ECUs) and ADAS domain controllers during alternator load dump events in heavy-duty trucks with 24 V systems. IC Role / Device Role / Timing Role: Parallel-connected TVS across main 24 V input rail, triggered by 120 V/400 ms transients, clamping to ≤48.4 V to preserve 3.3 V/5 V LDOs and CAN transceivers. Use Value: Meets ISO 7637-2 Pulse 5a/b requirements without derating - validated by AEC-Q101 stress testing up to 1500 A forward surge current. |
| Industrial Motor Drive DC Bus Protection | Telecom Outdoor Base Station Surge Protection |
Use Scenario: Shielding IGBT gate drivers and current-sense amplifiers in variable-frequency drives from switching-induced transients and capacitor bank discharge spikes. IC Role / Device Role / Timing Role: Mounted directly across DC link capacitors (300–400 V nominal), clamping fast-rising dV/dt spikes (<10 ns) before they propagate to low-voltage control logic. Use Value: 30 V VWM allows use in auxiliary 24 V control rails; 48.4 V VC ensures microcontrollers remain within absolute maximum ratings even during 1000 A short-circuit faults. | Use Scenario: Secondary surge protection stage for remote radio heads (RRHs) deployed on cell towers exposed to direct lightning strikes per IEC 61000-4-5 Class 4 (42 Ω source). IC Role / Device Role / Timing Role: Final-stage TVS on RF front-end power feeds and Ethernet interfaces, absorbing residual energy after gas discharge tube (GDT) primary protection. Use Value: 18 kW rating enables single-device coverage for both differential and common-mode surges on PoE+ lines, reducing BOM count and PCB area vs. dual-diode arrays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30A | 600 W PPP rating, 5.0 mm × 4.5 mm SMB package, RθJC ≈ 25 °C/W, VWM = 30 V, VC = 48.4 V @ 12.3 A | Rated only for single-event surges; unsuitable for multi-stroke DO-160 or repeated load dump cycles | Select SMBJ30A only for cost-sensitive consumer electronics with infrequent, low-energy transients. |
| SMCJ30A | 1500 W PPP rating, 7.2 mm × 6.2 mm SMC package, RθJC ≈ 12 °C/W, VWM = 30 V, VC = 48.4 V @ 75 A | Lacks AEC-Q101 qualification and RTCA DO-160 certification; limited to industrial-grade non-aerospace use | Choose SMCJ30A for general-purpose industrial controls where 1.5 kW peak power suffices and thermal cycling is moderate. |
Compared with SMBJ30A and SMCJ30A, the MPLAD18KP30AE3 delivers 12× and 12× higher peak pulse power respectively, achieves 36× and 17× lower junction-to-case thermal resistance, and is certified for aerospace lightning standards - making it the sole option for mission-critical multi-stroke surge environments.
Availability
MPLAD18KP30AE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU power systems, and industrial motor drive designs requiring stable component supply, long-term lifecycle support, and certified surge immunity.
Supply support for MPLAD18KP30AE3 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 MPLAD18KP30AE3 belongs to Microsemi's PLAD high-power TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump compliance in safety-critical systems where thermal robustness and certification traceability are mandatory.
FAQ
What is the maximum clamping voltage of the MPLAD18KP30AE3 under peak surge conditions?
The MPLAD18KP30AE3 has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current of 372 A under 10/1000 μs waveform conditions. This value is guaranteed across temperature and process variation, ensuring downstream 5 V or 3.3 V logic remains within safe operating limits during surge events. The MPLAD18KP30AE3 maintains this clamping performance even after repeated multi-stroke surges when properly heatsinked.
How is the cathode terminal configured on the MPLAD18KP30AE3, and why does it matter for PCB layout?
The cathode of the MPLAD18KP30AE3 is the exposed metal baseplate on the underside of the package - not a top-side pin - and must be soldered directly to a large copper ground plane or heatsink. This configuration minimizes inductance (<1 nH) and maximizes thermal transfer (RθJC = 0.7 °C/W), which is essential for sub-100 ns response and multi-pulse reliability. Incorrect layout isolating the baseplate causes thermal runaway and premature failure of the MPLAD18KP30AE3.
Does the MPLAD18KP30AE3 meet automotive qualification standards?
Yes, the MPLAD18KP30AE3 is AEC-Q101 qualified for stress testing including high-temperature reverse bias, temperature cycling, and humidity bias. It is specifically validated for automotive 24 V load dump protection (ISO 7637-2 Pulse 5) and jump-start events, with surge testing performed to 1500 A forward current. Its RoHS-compliant e3 finish and lot traceability further support automotive production requirements for the MPLAD18KP30AE3.
Can the MPLAD18KP30AE3 be used for bidirectional surge protection?
No, the MPLAD18KP30AE3 is a unidirectional TVS diode, indicated by the "A" suffix (vs. "CA" for bidirectional variants like MPLAD18KP30CA). It conducts only during positive transients relative to its cathode (baseplate) and blocks negative excursions beyond its VWM. For AC-coupled or symmetrical signal lines requiring bidirectional clamping, the MPLAD18KP30AE3 must be replaced with its CA counterpart or paired with a second device - the MPLAD18KP30AE3 itself cannot perform bidirectional suppression.
What is the thermal resistance from junction to ambient (RθJA) for the MPLAD18KP30AE3, and how does mounting affect it?
The datasheet specifies RθJA = 50 °C/W for the MPLAD18KP30AE3 when mounted on FR4 with the recommended pad layout - but this value assumes minimal copper area. In practice, RθJA drops significantly with increased copper: adding a 25 cm² thermal pad reduces it to ~12 °C/W, while direct attachment to an aluminum heatsink achieves <3 °C/W. Because the MPLAD18KP30AE3 relies on its metal baseplate for heat transfer, RθJA is highly layout-dependent and must be verified per actual board design.
MPLAD18KP30AE3 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 372A
- Power - Peak Pulse:
- 18000W (18kW)
- 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
MPLAD18KP30AE3 FAQ
1.How can I place an order for MPLAD18KP30AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP30AE3 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 MPLAD18KP30AE3 reliable?
The price and inventory of MPLAD18KP30AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP30AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP30AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP30AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP30AE3?
MPLAD18KP30AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP30AE3 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 MPLAD18KP30AE3?
For technical support, including MPLAD18KP30AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP30AE3 requirements.
6.How does Aetrix verify that MPLAD18KP30AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP30AE3 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 MPLAD18KP30AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP30AE3?
All MPLAD18KP30AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP30AE3, 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 MPLAD18KP30AE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP30AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP30AE3 Tags
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