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Microchip Technology MPLAD36KP17A
- Part No.:
- MPLAD36KP17A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP17A.pdf
- Description:
- TVS DIODE 17VWM 28.8VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:5,292
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Product details
Overview
MPLAD36KP17A 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 36 kW peak pulse power at 10/1000 μs, features a 17 V reverse standoff voltage (VWM), clamps transients to ≤28.8 V at 1250 A peak pulse current (IPP), and operates across –55°C to +150°C junction temperature range - deployed in lightning-prone avionics and load-dump-protected vehicle ECUs.
For engineers reviewing the MPLAD36KP17A datasheet, MPLAD36KP17A pinout, MPLAD36KP17A application, or MPLAD36KP17A equivalent, this page provides verified electrical parameters, IEC 61000-4-5 and RTCA DO-160F Waveform 4/5A compliance data, thermal resistance (RθJC = 1.0 °C/W), polarity marking convention, and RoHS-compliant packaging details essential for high-reliability board-level surge design.
Technical Context
The MPLAD36KP17A employs a silicon avalanche diode structure optimized for low clamping voltage and minimal thermal resistance. Its metal-base cathode construction enables direct heatsinking, supporting sustained multi-stroke surge events per RTCA DO-160 Section 22. The device meets AEC-Q101 stress testing requirements and is rated for secondary lightning protection under IEC 61000-4-5 with 2 Ω, 12 Ω, and 42 Ω source impedances.
It exhibits a temperature coefficient of breakdown voltage (αV(BR)) of +14 mV/°C and maintains <5 ns response time. Standby current ID is ≤150 μA at VWM, and forward clamping voltage VFS is 4.0 V at 500 A - enabling robust ESD/EFT immunity per IEC 61000-4-2/4-4 without compromising system-level signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 17 V - matches nominal 12 V automotive and avionics bus systems with margin |
| Breakdown Voltage (V(BR)) | 18.9–20.9 V @ 5 mA - ensures reliable avalanche initiation before system damage |
| Max Clamping Voltage (VC) | 28.8 V @ IPP = 1250 A - limits downstream IC voltage stress during worst-case transients |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables effective heat transfer to PCB copper or external heatsink |
| Standby Current (ID) | ≤150 μA @ VWM - negligible leakage in always-on power rails |
| Temperature Range | –55°C to +150°C - qualified for engine bay, flight control, and industrial ambient extremes |
Pinout & Package
Package: PLAD (Plastic Leaded Anvil Device) - void-free UL94V-0 epoxy body with metal base cathode; dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H); weight: ~1.7–2.0 g; polarity marked on unidirectional variants - cathode is the metal base (bottom side).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top surface pad) | Transient current entry point | Connected to protected line (e.g., 12 V rail); accepts surge energy into avalanche path |
| Cathode (metal base) | Current return / heatsink interface | Electrically and thermally connected to ground plane or heatsink; defines polarity orientation |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMT package with metal base | Enables direct thermal coupling to PCB ground plane, reducing RθJA to 50 °C/W on FR4 |
| AEC-Q101 qualified | Validated for automotive under-hood applications including load dump and jump-start transients |
| RTCA DO-160F Waveform 4 & 5A compliance | Meets Level 4/5 pin-injection lightning immunity for commercial aircraft avionics interfaces |
| IEC 61000-4-5 Class 5 support (42 Ω source) | Provides secondary lightning protection for long-distance wiring harnesses in transport systems |
| Moisture Sensitivity Level 1 | No dry pack or baking required prior to reflow - simplifies manufacturing and reduces cost |
Applications
| Aerospace Avionics Power Protection | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting ARINC 429 data lines and 28 V DC power inputs in flight management computers against induced lightning surges per DO-160 Section 22. IC Role / Device Role / Timing Role: Primary transient shunt element placed at board edge before LDO regulators and FPGA power pins. Use Value: Clamps 10/1000 μs surges to ≤28.8 V while dissipating 36 kW - preventing latch-up or gate oxide rupture in sensitive logic. |
Use Scenario: Safeguarding 12 V supply rails in diesel engine control modules exposed to ISO 7637-2 Pulse 5a/b load dump events. IC Role / Device Role / Timing Role: High-power TVS placed parallel to input capacitor bank, conducting surge current away from DC-DC converters. Use Value: Withstands ≥1000 repetitive 12 V load dump pulses without parameter shift - validated per AEC-Q101 stress protocols. |
| Industrial Motor Drive DC Bus | Railway Signaling Power Interface |
Use Scenario: Suppressing commutation-induced transients on 24–48 V DC bus lines feeding servo drives in factory automation systems. IC Role / Device Role / Timing Role: Fast-response clamp mounted directly at bus entry point, minimizing trace inductance before filter chokes. Use Value: Sub-5 ns response time and 1.0 °C/W RθJC enable rapid thermal recovery between motor start-stop cycles. |
Use Scenario: Securing 110 V DC signaling power inputs in European railway interlocking cabinets against traction-induced surges per EN 50121-4. IC Role / Device Role / Timing Role: Secondary protection stage downstream of gas discharge tube (GDT), handling residual energy after primary diversion. Use Value: Supports IEC 61000-4-5 Class 4 with 12 Ω source impedance - critical for long cable runs in trackside enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17A | Lower PPP (600 W), smaller SMB package, RθJC ≈ 15 °C/W | Suitable only for single-event, low-duty-cycle surges - not rated for multi-stroke DO-160 testing | Select when cost and board space constrain requirements and surge energy is <1% of MPLAD36KP17A capability |
| SMCJ17A | PPP = 1500 W, SMC package, RθJC ≈ 3.5 °C/W, same VWM/V(BR) range | Lacks AEC-Q101 qualification and DO-160F waveform validation; limited to industrial non-avionics use | Choose for general-purpose industrial I/O protection where full aerospace certification is unnecessary |
Compared with SMBJ17A and SMCJ17A, the MPLAD36KP17A delivers >24× higher peak power handling, certified multi-stroke endurance, and direct metal-base thermal path - making it the sole option for DO-160F Level 5 and AEC-Q101-compliant automotive power rail protection.
Availability
MPLAD36KP17A is available at Aetrix Electronics and suitable for aerospace avionics, automotive ECU, and industrial motor drive applications requiring stable component supply, long-term lifecycle assurance, and traceable high-reliability sourcing.
Supply support for MPLAD36KP17A 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 analog, mixed-signal, and power semiconductors for aerospace, defense, and industrial markets - emphasizing radiation tolerance, surge resilience, and long-lifecycle support.
The MPLAD36KP17A belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning and load-dump protection in safety-critical platforms where thermal stability and repeatable clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of the MPLAD36KP17A at its rated peak pulse current?
The MPLAD36KP17A has a maximum clamping voltage (VC) of 28.8 V at its peak pulse current (IPP) of 1250 A under 10/1000 μs waveform conditions. This value is guaranteed per the manufacturer's electrical characteristics table and ensures downstream circuitry remains within safe operating voltage limits during high-energy transients. The MPLAD36KP17A achieves this clamping performance while maintaining sub-5 ns response time and low thermal resistance.
Is the MPLAD36KP17A RoHS compliant, and what is its moisture sensitivity level?
Yes, the MPLAD36KP17A is RoHS compliant (designated by "e3" suffix in nomenclature) and carries Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B - meaning it requires no dry pack or baking prior to reflow soldering. This eliminates handling overhead in manufacturing and supports standard SMT assembly processes without yield risk. The MPLAD36KP17A's e3 plating and UL94V-0 epoxy body meet environmental and safety requirements for global deployment.
How does the MPLAD36KP17A differ from bidirectional variants like MPLAD36KP17CA?
The MPLAD36KP17A is unidirectional, with cathode on the metal base, and conducts surge current only from anode to cathode - ideal for DC power line protection. In contrast, MPLAD36KP17CA is bidirectional, symmetrically clamping both polarities, suited for AC signal lines or differential buses. Their VWM, V(BR), and VC values differ accordingly: MPLAD36KP17A has VWM = 17 V and V(BR) = 18.9–20.9 V, while MPLAD36KP17CA has VWM = 17 V but symmetrical breakdown in both directions.
Can the MPLAD36KP17A be used for RTCA DO-160F Lightning Induced Transient Susceptibility testing?
Yes, the MPLAD36KP17A is explicitly validated for RTCA DO-160F Section 22 Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs) up to Level 5 - confirmed in the official datasheet RF01216 Rev B. It meets Level 5 for Waveform 4 with VWM up to 300 V, and Level 5 for Waveform 5A up to 38 V standoff, placing MPLAD36KP17A within the certified range for 17 V-rated applications in commercial aircraft systems.
What is the thermal resistance and recommended mounting method for optimal performance of the MPLAD36KP17A?
The MPLAD36KP17A has a junction-to-case thermal resistance (RθJC) of 1.0 °C/W, achieved via direct metal-base contact to a heatsink or large PCB copper area. For optimal thermal performance, mount using the recommended pad layout (0.470″ × 0.230″ top pad, 0.100″ × 0.045″ thermal relief) on FR4 with ≥2 oz copper, and ensure the metal base makes low-impedance contact to ground plane. This configuration sustains repeated 36 kW surges without thermal runaway. The MPLAD36KP17A's design relies on this thermal path for reliability.
MPLAD36KP17A 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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 28.8V
- Current - Peak Pulse (10/1000µs):
- 1250A (1.25kA)
- 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
MPLAD36KP17A FAQ
1.How can I place an order for MPLAD36KP17A through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP17A 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 MPLAD36KP17A reliable?
The price and inventory of MPLAD36KP17A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP17A is usually 5 days.
3.What payment methods are accepted for MPLAD36KP17A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP17A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP17A?
MPLAD36KP17A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP17A 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 MPLAD36KP17A?
For technical support, including MPLAD36KP17A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP17A requirements.
6.How does Aetrix verify that MPLAD36KP17A is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP17A 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 MPLAD36KP17A meets industry standards.
7.What is the process for return or replacement of MPLAD36KP17A?
All MPLAD36KP17A units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP17A, 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 MPLAD36KP17A part is unused and in its original packaging.
Return procedure for MPLAD36KP17A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP17A Tags
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