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Microchip Technology MPLAD18KP64AE3
- Part No.:
- MPLAD18KP64AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP64AE3.pdf
- Description:
- TVS DIODE 64VWM 103VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,398
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Product details
Overview
MPLAD18KP64AE3 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 ≤103 V under 175 A peak impulse current, and features a 64 V reverse standoff voltage (VWM), 71.1–78.6 V breakdown voltage (V(BR)), and 0.7 °C/W junction-to-case thermal resistance. It is qualified to AEC-Q101 and supports RTCA DO-160F Level 4 pin injection protection.
For engineers reviewing the MPLAD18KP64AE3 datasheet, MPLAD18KP64AE3 pinout, MPLAD18KP64AE3 application, or MPLAD18KP64AE3 equivalent, this device is selected for high-reliability secondary lightning protection (IEC 61000-4-5 Class 1–4), load dump suppression in 24 V vehicle electronics, and ESD/EFT hardening per IEC 61000-4-2/4-4 - with RoHS-compliant e3 plating and MIL-PRF-19500 upscreening options available.
Technical Context
This TVS diode operates as a clamping-type overvoltage protector using an avalanche breakdown mechanism. Its metal-base cathode construction enables low thermal resistance (RθJC = 0.7 °C/W) and efficient heat transfer to the PCB copper pad or heatsink. The device is characterized for operation across –55 °C to +150 °C junction temperature, with standby leakage current ID ≤10 μA at 64 V and clamping response time <100 ps.
It meets multi-stroke lightning immunity per RTCA DO-160 Section 22 and supports dual-source-impedance testing per IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω configurations). The 1 g thermoset epoxy package complies with UL94V-0 and IPC/JEDEC J-STD-020B moisture sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 64 V - maximum continuous DC or peak AC voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 71.1–78.6 V @ I(BR) - defines reliable avalanche onset threshold for design margining |
| Max Clamping Voltage (VC) | 103 V @ IPP = 175 A - limits downstream circuit voltage stress during worst-case transients |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables direct thermal coupling to heatsink or large copper pour for sustained surge duty |
| Steady-State Power Dissipation | 71 W @ TC = 100 °C - supports continuous thermal management when mounted on heatsink |
| Moisture Sensitivity Level | Level 1 - no dry-pack or baking required prior to reflow soldering |
Pinout & Package
Package: Surface-mount PLAD (Plastic Leaded Anode Down) with metal base cathode terminal. Dimensions: 12.32 × 10.54 × 5.33 mm (L × W × H), weight ≈1 g. Void-free UL94V-0 epoxy body; matte-tin (e3) RoHS-compliant plating; polarity marked by cathode on metal base underside.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Surface Pad) | Positive input terminal for unidirectional conduction | Soldered to protected line; conducts only during reverse-biased surge events |
| Cathode (Metal Base) | Reference/return path; primary thermal interface | Must be soldered to large copper area or heatsink for RθJC = 0.7 °C/W performance |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW Surge Rating | Enables single-device protection against RTCA DO-160 Section 22 multi-stroke lightning events |
| Low RθJC (0.7 °C/W) | Reduces thermal derating impact - maintains PPP rating under sustained ambient temperatures up to +100 °C case |
| AEC-Q101 Qualified | Validated for automotive under-hood applications including 24 V load dump and ISO 7637-2 compliance |
| e3 RoHS Compliant Plating | Meets lead-free reflow requirements (260 °C, 10 s) without solderability degradation or whisker risk |
| DO-160F Waveform 4 & 5A Support | Provides Level 4 pin injection immunity (6.4/69 μs and 40/120 μs) for avionics signal/power lines |
Applications
| Aerospace Avionics Power Protection | Automotive 24 V Load Dump Suppression |
|---|---|
Use Scenario: Protecting 28 V DC power inputs in flight control computers and inertial navigation units from induced lightning transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed at board-level input filter stage. Use Value: Meets RTCA DO-160 Section 22 Level 4 with <103 V clamping, eliminating need for series impedance or additional filtering stages. | Use Scenario: Safeguarding engine control unit (ECU) power rails during alternator load dump events in commercial trucks. IC Role / Device Role / Timing Role: Primary transient clamp on battery feed line upstream of DC/DC converters. Use Value: Withstands 18,000 W pulses at 10/1000 μs while maintaining VWM = 64 V - compatible with 24 V nominal + 100 % tolerance systems. |
| Industrial Motor Drive DC Bus Protection | Railway Signaling Interface Protection |
Use Scenario: Shielding 60–80 V DC bus inputs in variable frequency drives from switching-induced transients and ground bounce. IC Role / Device Role / Timing Role: High-power TVS connected between DC+ and chassis ground near bus entry point. Use Value: 0.7 °C/W RθJC allows direct mounting to aluminum heatsink, sustaining repeated 175 A surges without thermal runaway. | Use Scenario: Hardening 64 V signaling lines in European railway ETCS Level 2 balise transmission interfaces against EFT bursts and lightning coupling. IC Role / Device Role / Timing Role: Bidirectional-capable variant used (MPLAD18KP64CA); this unidirectional version applied where polarity is fixed. Use Value: Passes IEC 61000-4-4 Level 4 (4 kV EFT) and IEC 61000-4-5 Class 4 (42 Ω source) with VC ≤103 V - ensures signal integrity during EMC testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A (onsemi) | 600 W PPP rating, SMC package, RθJA = 40 °C/W, no AEC-Q101 or DO-160 qualification | Limited to consumer/industrial grade; insufficient for aviation or automotive safety-critical use | Select only for cost-sensitive non-safety applications where 18 kW surge capacity is unnecessary |
| SMCJ64A (Littelfuse) | 1500 W PPP, SMC package, 100 ns response, no thermal resistance spec or upscreening support | Not rated for RTCA DO-160 or IEC 61000-4-5 Class 4; lacks traceability and lot screening | Acceptable for basic ESD/EFT protection but cannot replace MPLAD18KP64AE3 in aerospace or high-reliability designs |
Compared with SMBJ64A and SMCJ64A, the MPLAD18KP64AE3 provides 12× higher peak pulse power, certified AEC-Q101 and DO-160 compliance, 0.7 °C/W thermal resistance for heatsink integration, and full MIL-PRF-19500 upscreening path - making it the sole option for mission-critical surge protection where reliability, thermal performance, and regulatory validation are mandatory.
Availability
MPLAD18KP64AE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU power systems, and industrial motor drive DC bus protection requiring stable component supply, long-term lifecycle assurance, and traceable high-reliability sourcing.
Supply support for MPLAD18KP64AE3 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 MPLAD series was developed specifically for high-energy transient suppression in safety-critical platforms - emphasizing thermal robustness, multi-stroke lightning resilience, and qualification to RTCA DO-160, AEC-Q101, and IEC 61000-4-x standards.
FAQ
What is the clamping voltage of MPLAD18KP64AE3 at its rated peak pulse current?
The MPLAD18KP64AE3 has a maximum clamping voltage (VC) of 103 V at IPP = 175 A under 10/1000 μs waveform conditions. This value is guaranteed per datasheet Figure 3 and Table on page 4, ensuring downstream circuitry remains below critical voltage thresholds during standardized surge events.
Is MPLAD18KP64AE3 suitable for automotive under-hood applications?
Yes, MPLAD18KP64AE3 is AEC-Q101 qualified and explicitly rated for automotive load dump protection. Its 64 V VWM aligns with 24 V system derating requirements, and its 18,000 W PPP rating exceeds ISO 7637-2 Pulse 5a energy levels - confirmed in Microsemi RF01215 Rev B test reports.
Does MPLAD18KP64AE3 require special PCB layout considerations?
Yes - the cathode is the metal base, which must be soldered to a minimum 10.54 mm × 12.32 mm copper pad (per datasheet pad layout) or directly to a heatsink to achieve the specified 0.7 °C/W RθJC. Insufficient copper area will cause thermal derating and premature failure during repetitive surges.
What does the "E3" suffix mean in MPLAD18KP64AE3?
The "E3" suffix indicates RoHS-compliant matte-tin plating per JEDEC J-STD-020B Level 1, qualified for lead-free reflow at 260 °C for 10 seconds. It replaces legacy tin-lead terminations and ensures compatibility with modern assembly processes without compromising solderability or whisker resistance.
Can MPLAD18KP64AE3 be used for bidirectional transient protection?
No - MPLAD18KP64AE3 is unidirectional (denoted by "A" suffix). For bidirectional protection, the correct variant is MPLAD18KP64CA. Using the "A" version in AC-coupled or bipolar signal paths risks forward conduction and permanent damage during negative transients.
MPLAD18KP64AE3 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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 175A
- 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
MPLAD18KP64AE3 FAQ
1.How can I place an order for MPLAD18KP64AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP64AE3 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 MPLAD18KP64AE3 reliable?
The price and inventory of MPLAD18KP64AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP64AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP64AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP64AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP64AE3?
MPLAD18KP64AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP64AE3 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 MPLAD18KP64AE3?
For technical support, including MPLAD18KP64AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP64AE3 requirements.
6.How does Aetrix verify that MPLAD18KP64AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP64AE3 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 MPLAD18KP64AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP64AE3?
All MPLAD18KP64AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP64AE3, 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 MPLAD18KP64AE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP64AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP64AE3 Tags
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