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Microchip Technology MPLAD18KP170AE3
- Part No.:
- MPLAD18KP170AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD18KP170AE3.pdf
- Description:
- TVS DIODE 170VWM 275VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:8,952
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Product details
Overview
MPLAD18KP170AE3 from Microsemi is a surface-mount unidirectional transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive power systems. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 170 V reverse standoff voltage (VWM), clamps to ≤275 V at 66 A peak impulse current (IPP), and exhibits 0.7 °C/W junction-to-case thermal resistance for efficient heat dissipation - deployed in aircraft lightning protection per RTCA DO-160 Section 22.
For engineers reviewing the MPLAD18KP170AE3 datasheet, MPLAD18KP170AE3 pinout, MPLAD18KP170AE3 application, or MPLAD18KP170AE3 equivalent, key selection criteria include its 170 V VWM rating, 275 V max clamping voltage at 66 A, RoHS-compliant e3 matte-tin plating, UL94V-0 epoxy package, and qualification to AEC-Q101 and MIL-PRF-19500 screening levels.
Technical Context
This TVS diode operates as a unidirectional clamping device with cathode on the metal base (package bottom), enabling low-inductance mounting directly to heatsinks. Its silicon avalanche structure sustains 18 kW surges while maintaining sub-100 ps response time and <5 ns clamping latency under bidirectional test conditions - critical for multi-stroke lightning compliance.
It meets secondary lightning protection per IEC 61000-4-5 at 42 Ω, 12 Ω, and 2 Ω source impedances (Classes 1–5 depending on configuration), and satisfies RTCA/DO-160F Waveform 4 (Level 4) and Waveform 5A (Level 4) pin injection requirements up to 170 V VWM - validated across -55°C to +150°C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - maximum continuous DC or peak AC voltage the device blocks without conduction |
| V(BR) min/max | 189–209 V - breakdown occurs within this range at specified test current, defining turn-on threshold |
| VC @ IPP | 275 V max at 66 A - clamping voltage during 10/1000 μs surge, limiting downstream circuit stress |
| PPP | 18,000 W @ 10/1000 μs - peak power handling capacity under standardized surge waveform |
| RθJC | 0.7 °C/W - enables direct thermal coupling to heatsink for sustained multi-pulse operation |
| ID @ VWM | 10 μA max - ultra-low leakage ensures minimal standby power loss in high-impedance circuits |
| αV(BR) | 207 mV/°C - predictable voltage drift over temperature supports stable protection margin design |
Pinout & Package
Surface-mount PLAD package with metal base cathode termination; void-free UL94V-0 epoxy body (12.32 × 10.54 × 5.08 mm); tin-lead or RoHS-compliant matte-tin plating (e3); polarity marked by cathode on bottom surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface pad) | Transient current entry point during positive surge | Connected to protected line; low-inductance layout minimizes voltage overshoot |
| Cathode (metal base) | Current return path and thermal interface | Directly mounted to heatsink or copper pour; serves dual electrical/thermal function |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW peak pulse rating | Enables single-device protection against severe lightning-induced transients per DO-160F Section 22 |
| 0.7 °C/W RθJC | Supports >100 pulses at 0.05% duty cycle without thermal runaway when heatsink-mounted |
| AEC-Q101 qualified | Validated for automotive load dump and alternator surge environments (-55°C to +150°C) |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for SMT assembly |
| e3 RoHS-compliant plating | Ensures solderability and long-term reliability under JEDEC J-STD-020B reflow profiles |
Applications
| Aircraft Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC avionics bus against lightning-induced surges per RTCA DO-160F Section 22 Waveform 4 and 5A. IC Role / Device Role / Timing Role: Primary clamping element placed at board edge input filter stage to limit transient energy entering LDOs and FPGAs. Use Value: Withstands ≥1500 A surge current and maintains clamping below 275 V, preserving integrity of downstream 3.3 V/5 V logic rails. | Use Scenario: Load dump suppression on 12 V battery-fed ECU power rail during alternator field cutoff events. IC Role / Device Role / Timing Role: Unidirectional TVS shunting surge energy to chassis ground before it reaches MCU power supply pins. Use Value: 18 kW rating handles ISO 7637-2 Pulse 5a (116 V, 400 ms) without degradation; 170 V VWM avoids false triggering during normal battery transients. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: Surge protection on 200–300 V DC bus lines exposed to switching transients from IGBT inverters and contactor bounce. IC Role / Device Role / Timing Role: High-power TVS placed across bus terminals to clamp voltage spikes exceeding 250 V. Use Value: 275 V clamping voltage prevents overvoltage damage to gate drivers and current sensors; metal-base thermal path sustains repeated 10/1000 μs events. | Use Scenario: Secondary protection on 75 V signaling lines in train control systems subjected to induced surges from nearby traction currents. IC Role / Device Role / Timing Role: Standoff-rated TVS installed upstream of optocouplers and RS-485 transceivers to limit common-mode transients. Use Value: Meets IEC 61000-4-5 Class 4 (42 Ω source) with 170 V VWM, ensuring signal integrity during electromagnetic interference events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A | 600 W PPP rating, 200 V VWM, SMB package, RθJA = 40 °C/W | Limited to single-stroke surges; unsuitable for DO-160F multi-stroke or automotive load dump | Select only for low-energy industrial I/O protection where 18 kW capability is unnecessary |
| SMCJ170A | 1500 W PPP rating, 170 V VWM, SMC package, RθJC = 2.5 °C/W | Cannot sustain >5 pulses at 0.05% duty factor; lacks AEC-Q101 and DO-160F validation | Acceptable for cost-sensitive non-aerospace designs requiring basic 170 V clamping |
Compared with SMBJ170A and SMCJ170A, the MPLAD18KP170AE3 provides 30× higher peak power handling, 0.7 °C/W thermal resistance for direct heatsink mounting, and full qualification to RTCA DO-160F and AEC-Q101 - making it the sole option for certified multi-stroke lightning and automotive load dump protection.
Availability
MPLAD18KP170AE3 is available at Aetrix Electronics and suitable for aircraft avionics, automotive ECU power systems, and industrial motor drive DC bus protection requiring stable component supply across extended production lifecycles.
Supply support for MPLAD18KP170AE3 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, RF, and timing solutions 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 surge endurance, and compliance with RTCA DO-160, IEC 61000-4-5, and AEC-Q101 standards.
FAQ
What is the clamping voltage of MPLAD18KP170AE3 at its rated peak pulse current?
The MPLAD18KP170AE3 has a maximum clamping voltage (VC) of 275 V at 66 A peak impulse current (IPP) under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01215 datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The device maintains this clamping performance across its full operating temperature range (-55°C to +150°C).
Is MPLAD18KP170AE3 qualified for automotive applications?
Yes, the MPLAD18KP170AE3 is explicitly qualified to AEC-Q101 for automotive use. It is validated for load dump protection in 12 V and 24 V systems, meeting ISO 7637-2 Pulse 5a requirements. Its construction includes wafer-level lot traceability, 3σ screening on standby current (ID), and surge testing per AEC-Q101 stress conditions - confirming suitability for engine control units and battery management systems.
Does MPLAD18KP170AE3 meet RTCA DO-160F lightning protection requirements?
Yes, the MPLAD18KP170AE3 is certified for RTCA DO-160F Section 22 lightning-induced transient protection. It satisfies Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4 pin injection tests at 170 V VWM. Its 18 kW rating and low RθJC enable compliance with multi-stroke lightning standards required for commercial aircraft avionics installations.
What is the thermal resistance specification for MPLAD18KP170AE3?
The MPLAD18KP170AE3 has a junction-to-case thermal resistance (RθJC) of 0.7 °C/W, measured with case temperature controlled on a heatsink per datasheet condition #4. This ultra-low value enables direct mounting of the metal base to external heatsinks, supporting sustained multi-pulse operation without thermal runaway - a key differentiator from standard SMB/SMC packages with RθJC > 2.0 °C/W.
How does the e3 suffix in MPLAD18KP170AE3 affect its assembly process?
The e3 suffix in MPLAD18KP170AE3 indicates RoHS-compliant annealed matte-tin plating, fully compatible with standard lead-free reflow profiles per JEDEC J-STD-020B. It eliminates concerns about tin whisker growth and ensures reliable solder joint formation at 260°C for 10 seconds. Unlike non-RoHS variants, the e3 version requires no special flux or preheat adjustments during SMT assembly.
MPLAD18KP170AE3 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):
- 170V
- Voltage - Breakdown (Min):
- 189V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 66A
- 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
MPLAD18KP170AE3 FAQ
1.How can I place an order for MPLAD18KP170AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD18KP170AE3 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 MPLAD18KP170AE3 reliable?
The price and inventory of MPLAD18KP170AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD18KP170AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD18KP170AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD18KP170AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD18KP170AE3?
MPLAD18KP170AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD18KP170AE3 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 MPLAD18KP170AE3?
For technical support, including MPLAD18KP170AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD18KP170AE3 requirements.
6.How does Aetrix verify that MPLAD18KP170AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD18KP170AE3 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 MPLAD18KP170AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD18KP170AE3?
All MPLAD18KP170AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD18KP170AE3, 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 MPLAD18KP170AE3 part is unused and in its original packaging.
Return procedure for MPLAD18KP170AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD18KP170AE3 Tags
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