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Microchip Technology MPLAD18KP8.5CAE3
- Part No.:
- MPLAD18KP8.5CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP8.5CAE3.pdf
- Description:
- TVS DIODE 85VWM 137VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,332
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Product details
Overview
MPLAD18KP8.5CAE3 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial systems. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 8.5 V reverse standoff voltage (VWM), clamps to ≤14.4 V at 1250 A IPP, and exhibits <5 ns response time with 0.7 °C/W junction-to-case thermal resistance.
For engineers reviewing the MPLAD18KP8.5CAE3 datasheet, MPLAD18KP8.5CAE3 pinout, MPLAD18KP8.5CAE3 application, or MPLAD18KP8.5CAE3 equivalent, key selection criteria include IEC 61000-4-5 Class 1–4 secondary lightning protection capability, RTCA/DO-160F Waveform 4 Level 4 compliance, and bidirectional clamping performance under multi-stroke transients.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device triggered by avalanche breakdown, with symmetrical bidirectional conduction enabling protection of AC-coupled or differential signal lines without polarity constraints. Its low RθJC (0.7 °C/W) and void-free epoxy package support high-reliability mounting on FR4 with thermal pad, critical for sustained surge duty cycles per DO-160 Section 22.
Designed for secondary protection downstream of primary arresters, it meets IEC 61000-4-5 with 2 Ω, 12 Ω, and 42 Ω source impedances across multiple classes and satisfies ESD (IEC 61000-4-2) and EFT (IEC 61000-4-4) immunity requirements without external filtering components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous operating voltage before clamping begins; matches 5–9 V DC bus or RS-485 common-mode range. |
| V(BR) min/max | 9.44–10.4 V - Breakdown occurs within this band at 1 mA; ensures reliable turn-on margin above VWM. |
| VC @ IPP | ≤14.4 V at 1250 A - Clamping voltage limits downstream IC stress during 10/1000 μs surges. |
| PPP | 18,000 W @ 10/1000 μs - Enables single-device handling of aircraft lightning-induced transients per DO-160. |
| RθJC | 0.7 °C/W - Allows direct thermal coupling to PCB copper pour or heatsink for >1000W steady-state dissipation capability. |
| ID @ VWM | 150 μA max - Low leakage preserves battery life in always-on avionics monitoring circuits. |
| Response Time | <5 ns - Fast enough to protect sensitive analog front-ends and high-speed data interfaces from EFT bursts. |
Pinout & Package
Surface-mount PLAD package with metal base cathode (bidirectional symmetry means both terminals are functionally identical). Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ≈1 g. Requires recommended thermal pad layout per RF01215 Rev B for optimal RθJA (50 °C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Both terminals connect to protected line pair (e.g., CAN_H/CAN_L); no polarity orientation required during placement. |
| Metal base (bottom) | Thermal conduction plane | Must be soldered to large copper area or heatsink; serves as primary thermal path, not electrical return. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled buses (e.g., RS-485, CAN, Ethernet PHY) without polarity-sensitive layout. |
| DO-160F Waveform 4 Level 4 compliance | Withstands 6.4/69 μs pin-injection transients up to 100 V at 25 °C - certified for aircraft avionics I/O protection. |
| IEC 61000-4-5 Class 4 (42 Ω Zs) | Survives 4 kV surge tests with 42 Ω source impedance - suitable for secondary protection in industrial control cabinets. |
| MIL-PRF-19500 upscreening option | Available with M, MA, MX, or MXL reliability screening levels - supports military/aerospace qualification programs. |
| RoHS-compliant e3 plating | Tin-lead alternative eliminated; matte-tin terminations ensure compatibility with lead-free reflow profiles (260 °C/10 s). |
Applications
| Aircraft Avionics I/O Protection | Automotive Powertrain Control Module |
|---|---|
Use Scenario: Protecting ARINC 429 or MIL-STD-1553B data lines from lightning-induced transients during flight. IC Role / Device Role / Timing Role: Secondary TVS placed after filter inductors to clamp residual surges exceeding primary arrester capacity. Use Value: Meets RTCA/DO-160F Section 22 multi-stroke lightning test with no degradation after 1000+ 18 kW pulses. | Use Scenario: Safeguarding engine control unit (ECU) CAN FD bus against load dump and alternator ripple spikes. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential CAN pair, absorbing common-mode energy without disrupting signal integrity. Use Value: Clamps to ≤14.4 V at 1250 A while maintaining <5 ns response - prevents CAN transceiver latch-up during ISO 7637-2 Pulse 5a events. |
| Industrial PLC Analog Input Modules | Renewable Energy Inverter DC Link Monitoring |
Use Scenario: Shielding 4–20 mA current-loop sensor inputs from EFT bursts and ESD events in factory automation environments. IC Role / Device Role / Timing Role: Low-leakage (150 μA) TVS placed directly at connector entry point to minimize PCB trace inductance. Use Value: Passes IEC 61000-4-4 Level 4 (4 kV) and IEC 61000-4-2 Level 4 (15 kV air/8 kV contact) without parameter shift. | Use Scenario: Protecting voltage-sense circuitry monitoring 800 V DC link in solar inverters from switching transients and grid faults. IC Role / Device Role / Timing Role: High-PPP (18 kW) clamping device mounted near DC bus shunt resistor to limit overvoltage during IGBT turn-off. Use Value: Withstands repeated 10/1000 μs surges up to 18,000 W without thermal runaway due to 0.7 °C/W RθJC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5CA | 600 W PPP rating vs. 18,000 W; same VWM and bidirectional polarity. | Limited to consumer-grade single-stroke protection; cannot meet DO-160 multi-stroke or IEC 61000-4-5 Class 4. | Select only for cost-sensitive non-aerospace applications where surge energy is <100 J. |
| SMCJ8.5CA | 1500 W PPP; larger SMC package but still orders of magnitude below 18 kW capability. | Suitable for automotive infotainment or body electronics, not powertrain or avionics. | Use when board space allows SMC footprint and surge requirements are ≤1.5 kW. |
Compared with SMBJ8.5CA and SMCJ8.5CA, the MPLAD18KP8.5CAE3 provides 30× higher peak pulse power and certified multi-stroke endurance - essential for mission-critical aerospace and heavy-duty industrial deployments where single-event failure is unacceptable.
Availability
MPLAD18KP8.5CAE3 is available at Aetrix Electronics and suitable for aircraft avionics, automotive powertrain control, and industrial PLC analog input modules requiring stable component supply across extended product lifecycles.
Supply support for MPLAD18KP8.5CAE3 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 emphasis on radiation-hardened ICs, timing devices, and power protection components.
The MPLAD18KP8.5CAE3 belongs to Microsemi's high-power PLAD TVS family, engineered specifically for DO-160-compliant lightning protection and multi-kilowatt surge suppression in safety-critical platforms.
FAQ
What is the maximum clamping voltage of the MPLAD18KP8.5CAE3 at its rated peak pulse current?
The MPLAD18KP8.5CAE3 has a maximum clamping voltage (VC) of 14.4 V when subjected to its rated peak pulse current (IPP) of 1250 A under 10/1000 μs waveform conditions. This value is guaranteed across temperature and ensures downstream circuitry remains within safe operating voltage limits during surge events. The MPLAD18KP8.5CAE3 achieves this clamping performance while maintaining sub-5 ns response time.
Does the MPLAD18KP8.5CAE3 require special PCB layout considerations for thermal management?
Yes - the MPLAD18KP8.5CAE3 relies on its metal base for thermal conduction, so it must be mounted on a large copper pour or dedicated thermal pad per RF01215 Rev B pad layout guidelines. Failure to implement adequate copper area increases junction temperature and reduces surge endurance. The MPLAD18KP8.5CAE3's 0.7 °C/W RθJC rating assumes optimal thermal interface; insufficient copper can degrade RθJA from 50 to >100 °C/W.
Is the MPLAD18KP8.5CAE3 compliant with RoHS and halogen-free standards?
Yes - the "E3" suffix in MPLAD18KP8.5CAE3 denotes RoHS-compliant matte-tin plating, fully compliant with Directive 2011/65/EU. The device uses void-free UL94V-0 thermosetting epoxy and contains no halogens, cadmium, lead, mercury, hexavalent chromium, PBB, or PBDE. Full material declarations are available upon request for MPLAD18KP8.5CAE3.
Can the MPLAD18KP8.5CAE3 be used for IEC 61000-4-5 testing with 2 Ω source impedance?
Yes - the MPLAD18KP8.5CAE3 is explicitly rated for IEC 61000-4-5 Class 2 and Class 3 secondary lightning protection with 2 Ω source impedance, as confirmed in RF01215 Rev B. It withstands the corresponding test voltages without failure or parameter shift. This makes the MPLAD18KP8.5CAE3 suitable for protecting sensitive measurement circuits in utility metering and smart grid equipment.
What is the standby leakage current specification for the MPLAD18KP8.5CAE3 at its rated standoff voltage?
The MPLAD18KP8.5CAE3 exhibits a maximum standby current (ID) of 150 μA when biased at its 8.5 V reverse standoff voltage (VWM) and tested at 25 °C. This low leakage supports battery-powered avionics health-monitoring circuits and ensures minimal power drain in always-on industrial sensors. The MPLAD18KP8.5CAE3 undergoes 3σ lot norm screening on ID to guarantee consistency.
MPLAD18KP8.5CAE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 132A
- 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
MPLAD18KP8.5CAE3 FAQ
1.How can I place an order for MPLAD18KP8.5CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP8.5CAE3 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 MPLAD18KP8.5CAE3 reliable?
The price and inventory of MPLAD18KP8.5CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP8.5CAE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP8.5CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP8.5CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP8.5CAE3?
MPLAD18KP8.5CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP8.5CAE3 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 MPLAD18KP8.5CAE3?
For technical support, including MPLAD18KP8.5CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP8.5CAE3 requirements.
6.How does Aetrix verify that MPLAD18KP8.5CAE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP8.5CAE3 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 MPLAD18KP8.5CAE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP8.5CAE3?
All MPLAD18KP8.5CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP8.5CAE3, 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 MPLAD18KP8.5CAE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP8.5CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP8.5CAE3 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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Diodes Incorporated
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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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