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Microchip Technology MPLAD36KP170CA
- Part No.:
- MPLAD36KP170CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP170CA.pdf
- Description:
- TVS DIODE 170VWM 275VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,679
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Product details
Overview
MPLAD36KP170CA from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 36 kW peak pulse power at 10/1000 μs, features a 170 V reverse standoff voltage (VWM), clamps to ≤275 V at 131 A peak pulse current, and operates across –55°C to +150°C junction temperature.
For engineers reviewing the MPLAD36KP170CA datasheet, MPLAD36KP170CA pinout, MPLAD36KP170CA application, or MPLAD36KP170CA equivalent, this device is selected for secondary lightning protection per IEC 61000-4-5 (42 Ω, 12 Ω, and 2 Ω source impedances), RTCA DO-160F Waveform 4 & 5A pin injection compliance, and high-reliability avionics ESD/EFT suppression per IEC 61000-4-2/4-4.
Technical Context
This TVS diode uses silicon avalanche technology with low thermal resistance (RθJC = 1.0 °C/W) and a void-free UL94V-0 epoxy package optimized for PCB heat dissipation on FR4 with recommended pad layout. Its bidirectional construction enables symmetrical clamping during positive/negative transients without polarity sensitivity.
It meets AEC-Q101 stress testing requirements and supports MIL-PRF-19500 upscreening options (M/MA/MXL levels). Standby current ID is ≤10 μA at VWM, and breakdown voltage V(BR) is specified at 189–209 V with ±15 mV/°C temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains multi-stroke lightning surges without degradation under 0.05% duty cycle. |
| Reverse Standoff Voltage (VWM) | 170 V - maximum continuous operating voltage before clamping initiates; matches 150 V nominal DC bus with safety margin. |
| Clamping Voltage (VC) | 275 V max @ IPP = 131 A - limits downstream circuit voltage during surge, enabling robust protection of 200 V-rated components. |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables efficient heat transfer to heatsink or copper pour, critical for repeated surge events. |
| Operating Temperature Range | –55°C to +150°C - qualified for engine bay, avionics bays, and other extreme-environment deployments. |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack or bake required prior to reflow, simplifying SMT assembly. |
| RoHS Compliance | e3 marking - lead-free matte tin plating, compliant with EU RoHS Directive 2011/65/EU. |
Pinout & Package
Package: PLAD (Plastic Leaded Anvil Device), surface-mount, metal-base thermoset epoxy case with cathode on bottom metal surface. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ~1.7–2.0 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Surface Pad) | Transient Current Entry (Bidirectional) | Accepts surge current from either polarity; symmetric conduction path enables dual-direction clamping. |
| Cathode (Metal Base) | Transient Current Return / Heat Sink Interface | Provides low-inductance return path and primary thermal conduction path to PCB copper or heatsink. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Surge Clamping | Enables single-device protection of AC-coupled or floating signal/power lines without polarity constraints. |
| RTCA DO-160F Waveform 4 & 5A Compliance | Validated for Level 4 (Waveform 4) and Level 5 (Waveform 5A) pin-injection immunity in aircraft systems. |
| IEC 61000-4-5 Secondary Lightning Protection | Qualified across Class 1–5 with 42 Ω, 12 Ω, and 2 Ω source impedances - covers short/long distance coupling scenarios. |
| AEC-Q101 Qualified | Passes automotive-grade reliability stress tests including HTGB, HTRB, and temperature cycling - suitable for under-hood use. |
| Traceable Wafer & Assembly Lots | Supports full lot traceability for aerospace and defense programs requiring configuration control and failure analysis. |
Applications
| Aerospace Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC power inputs of flight management computers against DO-160 Section 22 lightning-induced transients. IC Role / Device Role / Timing Role: Primary secondary-level TVS clamp on main power rail, placed upstream of DC/DC converters and LDOs. Use Value: Withstands ≥1000A impulse repetition at 0.05% duty factor and maintains clamping <275 V - prevents latch-up or burnout in downstream ASICs. |
Use Scenario: Safeguarding 12 V battery-fed ECU microcontrollers during load dump events (ISO 7637-2 Pulse 5a/b). IC Role / Device Role / Timing Role: High-power transient absorber mounted directly at connector entry point, shunting surge energy to chassis ground. Use Value: 36 kW PPP rating ensures survival of 120 V/350 ms load dump pulses without parametric shift or catastrophic failure. |
| Railway Signaling Interface | Industrial Motor Drive DC Bus |
Use Scenario: Shielding Ethernet PHY interfaces in wayside signaling units from induced surges during nearby lightning strikes. IC Role / Device Role / Timing Role: Bidirectional TVS on isolated Ethernet transformer center taps and common-mode lines. Use Value: Symmetrical clamping (±275 V) preserves signal integrity while meeting EN 50121-4 immunity requirements for rolling stock. |
Use Scenario: Protecting 200 V DC bus links in variable-frequency drives from switching transients and regenerative spikes. IC Role / Device Role / Timing Role: Parallel-mounted TVS across bus capacitors to clamp overvoltage excursions exceeding 200 V rating. Use Value: Low RθJC (1.0 °C/W) and metal-base thermal path prevent thermal runaway during repetitive 10 kHz IGBT switching noise 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 |
|---|---|---|---|
| SMBJ170CA | 3.3 kW PPP rating, SMA package, RθJA = 50 °C/W, no AEC-Q101 or DO-160 qualification. | Limited to low-energy industrial I/O protection; unsuitable for aviation or automotive load dump. | Select only for cost-sensitive, non-safety-critical 170 V standby circuits with <1 kW surge exposure. |
| SMCJ170CA | 1500 W PPP, SMC package, same VWM but 3× lower energy handling; lacks MIL-PRF-19500 screening options. | Applicable for basic IEC 61000-4-5 Class 3 protection only; fails DO-160F Waveform 5A Level 4/5. | Use where space constraints prohibit PLAD footprint but system-level surge severity is moderate. |
Compared with SMBJ170CA and SMCJ170CA, the MPLAD36KP170CA provides 24× and 24× higher peak pulse power respectively, validated thermal performance for repeated surges, and full aerospace/automotive qualification - making it the sole option for mission-critical lightning and load dump protection.
Availability
MPLAD36KP170CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain electronics, railway signaling systems, and industrial motor drive designs requiring stable component supply across extended product lifecycles.
Supply support for MPLAD36KP170CA 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 MPLAD36KP170CA belongs to Microsemi's high-power PLAD TVS family, engineered specifically for multi-stroke lightning protection and automotive load dump compliance in safety-critical platforms.
FAQ
What is the clamping voltage of the MPLAD36KP170CA at its rated peak pulse current?
The MPLAD36KP170CA has a maximum clamping voltage (VC) of 275 V at its peak pulse current (IPP) of 131 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01216 datasheet and defines the upper voltage limit imposed on protected circuitry during surge events. The MPLAD36KP170CA maintains this clamping performance across its full operating temperature range when mounted per recommended pad layout.
Is the MPLAD36KP170CA qualified for automotive applications?
Yes, the MPLAD36KP170CA is AEC-Q101 qualified, having passed stress tests including high-temperature reverse bias, high-temperature operating life, and temperature cycling. It is designed for automotive powertrain and chassis systems exposed to load dump transients per ISO 7637-2 Pulse 5. The MPLAD36KP170CA's 36 kW PPP rating and 170 V VWM make it suitable for 24 V commercial vehicle ECUs and battery management systems.
Does the MPLAD36KP170CA meet RTCA DO-160F lightning protection requirements?
Yes, the MPLAD36KP170CA is explicitly listed in the RF01216 datasheet for RTCA DO-160F Section 22 compliance, including Waveform 4 (6.4/69 μs) Level 4 and Waveform 5A (40/120 μs) Level 4. It satisfies multi-stroke lightning standards for aircraft equipment when used with appropriate PCB layout and grounding. The MPLAD36KP170CA's bidirectional structure and low clamping voltage ensure consistent protection regardless of surge polarity.
What is the thermal resistance and how does it affect mounting of the MPLAD36KP170CA?
The MPLAD36KP170CA has a junction-to-case thermal resistance (RθJC) of 1.0 °C/W, with the metal base serving as the primary thermal path. Effective heat dissipation requires direct thermal contact between the cathode (metal base) and a large copper pour or external heatsink. The RF01216 datasheet specifies pad layout dimensions and recommends FR4 mounting - improper thermal design risks derating of PPP and premature failure during repetitive surges. The MPLAD36KP170CA's low RθJC enables sustained operation where alternatives exceed thermal limits.
How does the bidirectional construction of the MPLAD36KP170CA impact circuit design?
The bidirectional construction of the MPLAD36KP170CA eliminates polarity dependency, allowing placement on AC-coupled lines, transformer-coupled interfaces, or floating buses without orientation concerns. Unlike unidirectional TVS diodes, the MPLAD36KP170CA clamps symmetrically for both positive and negative transients - critical for protecting differential pairs, Ethernet PHYs, and isolated power rails. Its cathode-on-base configuration remains fixed, but circuit functionality is unaffected by board-side orientation.
MPLAD36KP170CA 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):
- 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:
- 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
MPLAD36KP170CA FAQ
1.How can I place an order for MPLAD36KP170CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP170CA 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 MPLAD36KP170CA reliable?
The price and inventory of MPLAD36KP170CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP170CA is usually 5 days.
3.What payment methods are accepted for MPLAD36KP170CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP170CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP170CA?
MPLAD36KP170CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP170CA 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 MPLAD36KP170CA?
For technical support, including MPLAD36KP170CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP170CA requirements.
6.How does Aetrix verify that MPLAD36KP170CA is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP170CA 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 MPLAD36KP170CA meets industry standards.
7.What is the process for return or replacement of MPLAD36KP170CA?
All MPLAD36KP170CA units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP170CA, 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 MPLAD36KP170CA part is unused and in its original packaging.
Return procedure for MPLAD36KP170CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP170CA Tags
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