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Microchip Technology MPLAD36KP170AE3/TR
- Part No.:
- MPLAD36KP170AE3/TR
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP170AE3/TR.pdf
- Description:
- SURFACE MOUNT 36,000 WATT, TVS,
- Quantity:
- Payment:
- Shipping:
Inventory:9,376
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Product details
Overview
MPLAD36KP170AE3/TR from Microchip Technology (formerly Microsemi) is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power rails. It features a 170 V working standoff voltage (VWM), 275 V maximum clamping voltage (VC) at 131 A peak pulse current, and 36,000 W peak pulse power rating at 10/1000 µs waveform - validated for RTCA DO-160 Section 22 multi-stroke lightning compliance.
For engineers reviewing the MPLAD36KP170AE3/TR datasheet, MPLAD36KP170AE3/TR pinout, MPLAD36KP170AE3/TR application, or MPLAD36KP170AE3/TR equivalent, this device is selected for high-reliability DC bus protection where low thermal resistance (RθJC = 1.0 °C/W), fast response (<100 ps turn-on), and AEC-Q101 qualification are mandatory design requirements.
Technical Context
This TVS operates in avalanche breakdown mode to clamp transients above its 189–209 V breakdown voltage (VBR) while maintaining <10 µA standby current at 170 V. Its PLAD package integrates a metal base cathode for direct thermal coupling to heatsinks, enabling sustained power dissipation up to 504 W at 100 °C case temperature.
The device meets IEC 61000-4-5 (42 Ω source) Class 5 secondary lightning protection up to 170 V systems and RTCA/DO-160G Waveform 4 (6.4/69 µs) Level 4 pin injection immunity - with clamping performance verified across –55 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 170 V - Maximum continuous DC or repetitive peak reverse voltage the device blocks without conduction. |
| VBR @ IBR | 189–209 V at 5 mA - Confirmed avalanche onset range; ensures reliable triggering above system operating voltage. |
| VC @ IPP | 275 V at 131 A - Clamped voltage during 10/1000 µs surge; limits downstream component stress to safe levels. |
| PPP | 36,000 W - Peak pulse power handling capacity; supports multi-stroke lightning events per DO-160. |
| RθJC | 1.0 °C/W - Junction-to-case thermal resistance; enables efficient heat transfer to external heatsink. |
| ID @ VWM | <10 µA - Low leakage current preserves system efficiency and prevents false triggering in high-impedance circuits. |
| TJ Range | –55 °C to +150 °C - Full operational junction temperature range; qualified for under-hood and avionics environments. |
Pinout & Package
Package: PLAD - Surface-mount, void-free thermosetting epoxy body with metal base cathode (pin 1), UL94V-0 rated, RoHS-compliant matte-tin plating, weight ≈1.8 g. Cathode marked on bottom metal surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal during surge conduction | Connected to protected line; conducts surge current toward cathode when VIN exceeds VBR. |
| Cathode (Metal Base) | Reference/ground terminal | Direct thermal path to PCB copper pour or heatsink; must be soldered to ≥1.5 cm² 1 oz Cu pad per Figure 7. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and chassis applications with extended temperature cycling and humidity testing. |
| RTCA DO-160 Section 22 compliant | Passes multi-stroke lightning test (Waveform 3, 5A, 4) - critical for aircraft power distribution units. |
| Low RθJC = 1.0 °C/W | Enables >500 W steady-state power handling at TC = 100 °C without derating - reduces need for oversized heatsinks. |
| 100% surge tested | Each unit subjected to 1000 A impulse prior to shipment - guarantees minimum robustness for mission-critical systems. |
| Moisture Sensitivity Level 1 | No dry pack or baking required before reflow - simplifies SMT assembly and eliminates moisture-related popcorning. |
Applications
| Aerospace Power Distribution | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC main bus in commercial aircraft avionics bays exposed to lightning-induced surges per DO-160G Section 22. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient overvoltage on primary power rail during multi-stroke lightning events. Use Value: Limits clamped voltage to ≤275 V during 131 A surges, protecting MIL-STD-704F-compliant converters and FPGAs. |
Use Scenario: 12 V/24 V battery-fed ECU power input subjected to ISO 7637-2 Pulse 5a load dump transients up to 120 V. IC Role / Device Role / Timing Role: Primary surge suppression element placed upstream of DC/DC converter input stage. Use Value: Absorbs 36 kW peak energy within <100 ps, preventing damage to automotive-grade PMICs and microcontrollers. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: 300–400 V DC link in variable-frequency drives exposed to switching transients from IGBT commutation. IC Role / Device Role / Timing Role: Secondary overvoltage clamp parallel to bulk capacitor bank on DC bus. Use Value: Clamps voltage overshoot to <110% of nominal bus voltage, extending electrolytic capacitor lifetime by >3×. |
Use Scenario: 72 V signaling lines in European railway interlocking systems requiring EN 50121-3-2 Class 3 immunity. IC Role / Device Role / Timing Role: Line-end TVS on trackside signal interface cards connected to outdoor cables. Use Value: Withstands repeated 1 kV/500 A surges per IEC 61000-4-5 (42 Ω source), ensuring 20+ year field reliability. |
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 | Lower PPP = 600 W; VC = 275 V at 2.2 A; SMC package with RθJC = 15 °C/W. | Only suitable for single-stroke surges in non-aerospace industrial controls. | Select only if surge energy is <10 J and thermal mass is sufficient to absorb 600 W pulses. |
| SMCJ170A | PPP = 1500 W; VC = 275 V at 5.5 A; same VWM/VBR but 24× lower peak power than MPLAD36KP170AE3/TR. | Limited to automotive infotainment and non-safety-critical ECUs per ISO 16750-2. | Use where cost is prioritized over DO-160 compliance and multi-stroke endurance. |
Compared with SMBJ170A and SMCJ170A, MPLAD36KP170AE3/TR delivers 60× higher peak power handling and 15× better thermal conductivity - making it the sole choice for certified aerospace lightning protection and high-reliability industrial DC bus clamping where single-event failure is unacceptable.
Availability
MPLAD36KP170AE3/TR is available at Aetrix Electronics and suitable for aerospace power distribution, automotive load dump protection, and industrial motor drive DC bus applications requiring stable component supply across extended product lifecycles.
Supply support for MPLAD36KP170AE3/TR 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
Microchip Technology acquired Microsemi in 2018 and now offers its high-reliability discrete portfolio including radiation-tolerant, aerospace-qualified, and AEC-Q101-certified components.
The MPLAD36KP170AE3/TR belongs to Microchip's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection in avionics, defense, and heavy-duty transportation systems.
FAQ
What is the clamping voltage of MPLAD36KP170AE3/TR at its rated peak pulse current?
The MPLAD36KP170AE3/TR has a maximum clamping voltage (VC) of 275 V when subjected to its rated peak pulse current of 131 A under the standard 10/1000 µs waveform. This value is measured per IEC 61000-4-5 test conditions and ensures downstream circuitry remains within safe operating voltage limits during surge events. The MPLAD36KP170AE3/TR maintains this clamping performance across its full –55 °C to +150 °C junction temperature range.
Is MPLAD36KP170AE3/TR suitable for bidirectional signal line protection?
No, MPLAD36KP170AE3/TR is a unidirectional TVS diode - its polarity is fixed with cathode on the metal base, and it only conducts in reverse bias above VBR. For bidirectional protection, Microchip offers the MPLAD36KP170CAE3/TR variant (with "CA" suffix). Using MPLAD36KP170AE3/TR on AC or differential signal lines would result in forward conduction during normal operation and potential failure.
Does MPLAD36KP170AE3/TR require special PCB layout considerations?
Yes - the MPLAD36KP170AE3/TR requires a dedicated thermal pad (≥1.5 cm² of 1 oz copper) directly under its metal cathode base, connected via ≥4 thermal vias to internal ground planes. Per Figure 7 in the datasheet, insufficient copper area raises RθJA beyond 50 °C/W, risking thermal runaway during repeated surges. The MPLAD36KP170AE3/TR also mandates 2 mm clearance to adjacent traces to prevent arcing at 275 V clamping level.
What standards does MPLAD36KP170AE3/TR comply with for aerospace use?
MPLAD36KP170AE3/TR is explicitly validated for RTCA DO-160G Section 22 multi-stroke lightning testing (Waveforms 3, 4, and 5A) and meets IEC 61000-4-5 Class 5 secondary lightning protection with 42 Ω source impedance. It is also AEC-Q101 qualified and rated for –55 °C to +150 °C operation - satisfying environmental stress requirements for flight-critical avionics power supplies and actuator controllers.
Can MPLAD36KP170AE3/TR replace older Microsemi TVS devices like the SMAJ170A?
No - MPLAD36KP170AE3/TR is not a drop-in replacement for SMAJ170A. While both share 170 V VWM, the MPLAD36KP170AE3/TR delivers 36,000 W peak power versus SMAJ170A's 400 W, uses a thermally optimized PLAD package instead of SMA, and requires different PCB pad layout. Substituting MPLAD36KP170AE3/TR without redesigning thermal management and surge routing will cause catastrophic failure. Always verify mechanical fit, thermal path, and surge coordination with upstream fusing when upgrading to MPLAD36KP170AE3/TR.
MPLAD36KP170AE3/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- Nonstandard SMD
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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):
- 131A
- Power - Peak Pulse:
- 36000W (36kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Military
- Qualification:
- MIL-PRF-19500
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PLAD
MPLAD36KP170AE3/TR FAQ
1.How can I place an order for MPLAD36KP170AE3/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP170AE3/TR 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 MPLAD36KP170AE3/TR reliable?
The price and inventory of MPLAD36KP170AE3/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP170AE3/TR is usually 5 days.
3.What payment methods are accepted for MPLAD36KP170AE3/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP170AE3/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP170AE3/TR?
MPLAD36KP170AE3/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP170AE3/TR 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 MPLAD36KP170AE3/TR?
For technical support, including MPLAD36KP170AE3/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP170AE3/TR requirements.
6.How does Aetrix verify that MPLAD36KP170AE3/TR is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP170AE3/TR 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 MPLAD36KP170AE3/TR meets industry standards.
7.What is the process for return or replacement of MPLAD36KP170AE3/TR?
All MPLAD36KP170AE3/TR units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP170AE3/TR, 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 MPLAD36KP170AE3/TR part is unused and in its original packaging.
Return procedure for MPLAD36KP170AE3/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP170AE3/TR Tags
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