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Microchip Technology MPLAD36KP85AE3
- Part No.:
- MPLAD36KP85AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP85AE3.pdf
- Description:
- TVS DIODE 85VWM 137VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,128
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Product details
Overview
MPLAD36KP85AE3 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive power systems. It delivers 36 kW peak pulse power at 10/1000 μs, features a 85 V reverse standoff voltage (VWM), clamps to ≤137 V at 263 A peak pulse current (IPP), and exhibits 1.0 °C/W junction-to-case thermal resistance - enabling robust secondary lightning protection per RTCA DO-160 Section 22 and IEC 61000-4-5.
For engineers reviewing the MPLAD36KP85AE3 datasheet, MPLAD36KP85AE3 pinout, MPLAD36KP85AE3 application, or MPLAD36KP85AE3 equivalent, this device is selected for high-reliability DC bus protection where multi-stroke surge endurance, low thermal resistance, and RoHS-compliant SMT packaging are mandatory - especially in avionics power distribution units and 24–48 V vehicle electronics subject to load dump transients.
Technical Context
This TVS operates as a silicon avalanche diode with controlled breakdown behavior, triggered when transient voltage exceeds its 85 V standoff rating. Its metal-base package provides direct thermal path to PCB copper, supporting sustained energy dissipation under repetitive 0.05% duty-cycle surges per Figure 1 and Figure 2 waveforms.
Clamping performance is validated at 263 A IPP with VC ≤137 V, and standby leakage remains ≤10 μA at VWM. It meets AEC-Q101 stress testing and supports MIL-PRF-19500 upscreening options for extended reliability screening including 3σ lot norm on ID.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains aircraft lightning-induced transients without failure |
| Reverse Standoff Voltage (VWM) | 85 V - matches nominal 72 V DC bus systems with 15% margin for ripple and tolerance |
| Clamping Voltage (VC) | ≤137 V @ 263 A - limits downstream IC voltage stress below 150 V absolute maximum ratings |
| Junction-to-Case Thermal Resistance | 1.0 °C/W - enables direct heatsinking via metal baseplate to reduce thermal runaway risk |
| Steady-State Power Dissipation | 71 W @ TC = 100°C - supports continuous operation with active thermal management |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - eliminates dry-pack requirement and floor-life constraints |
| RoHS Compliance | e3 suffix - matte-tin plating compliant with EU RoHS Directive 2011/65/EU |
Pinout & Package
Package: PLAD (Plastic Low-profile Anode-down) surface-mount package with metal baseplate acting as cathode terminal. Dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), weight ~1.85 g. Cathode is electrically connected to the exposed metal base - requires dedicated thermal pad on PCB per recommended layout (Ref. A=11.94 mm, B=5.85 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top metallization) | Transient current entry point | Soldered to protected line; carries full surge current into avalanche junction |
| Cathode (metal baseplate) | Return path & thermal interface | Must be soldered to large copper pour for heat extraction; serves as ground reference |
Key Features
| Feature | Design Value |
|---|---|
| 36 kW surge rating at 10/1000 μs | Validated for RTCA DO-160 Section 22 multi-stroke lightning compliance in aircraft power systems |
| 1.0 °C/W RθJC | Enables >70 W steady-state dissipation with minimal temperature rise when mounted on ≥2 oz Cu thermal pad |
| AEC-Q101 qualified | Passes accelerated stress tests including HTGB, HTRB, and TCT - suitable for automotive under-hood use |
| Level 1 moisture sensitivity | Zero dry-pack requirement and unlimited floor life - simplifies SMT assembly logistics |
| RoHS-compliant e3 plating | Matte-tin termination compatible with lead-free reflow profiles up to 260°C for 10 s |
Applications
| Aerospace Power Distribution | Automotive Load Dump Protection |
|---|---|
|
Use Scenario: 28 V DC power bus in flight control actuator electronics subjected to repeated lightning-induced surges per DO-160F Waveform 4 and 5A. IC Role / Device Role / Timing Role: Primary secondary surge clamp protecting upstream DC-DC converters and motor drivers from >10 kA transients. Use Value: Withstands ≥1000 surges at 263 A without parameter shift - verified by lot-level surge testing per spec. |
Use Scenario: 24 V battery-fed engine control module exposed to ISO 7637-2 Pulse 5a (load dump) up to 60 V/100 ms. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp placed directly at ECU input connector to limit bus voltage to <137 V. Use Value: Clamps within <100 ps, limiting voltage overshoot before LDOs or microcontrollers experience latch-up. |
| Industrial DC UPS Inputs | Railway Signaling Power Supplies |
|
Use Scenario: 48 V DC input stage of uninterruptible power supply handling grid-switching transients and capacitor bank switching spikes. IC Role / Device Role / Timing Role: High-energy transient absorber placed ahead of bulk capacitors and PFC controllers. Use Value: 36 kW PPP rating absorbs 10× higher single-pulse energy than standard 6.8 kW TVS diodes - reduces parallel device count. |
Use Scenario: 110 V DC auxiliary power feed in railway signaling cabinet subjected to IEC 61000-4-5 Class 4 surges (2 Ω source impedance). IC Role / Device Role / Timing Role: Secondary protection element after gas discharge tube (GDT), providing low-clamp backup for fast-rising edges. Use Value: Achieves Class 4 compliance up to 130 V standoff - MPLAD36KP85AE3 covers 85 V node with 50% margin for aging and temp drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ85A | Lower PPP rating (400 W), smaller SMC package, RθJA = 40 °C/W, no metal baseplate | Acceptable for single-event consumer-grade surges; insufficient for DO-160 multi-stroke or automotive load dump repetition | Select only for cost-sensitive, low-duty-cycle industrial controls where thermal mass is sufficient |
| Vishay V275SM36 | 36 kW rating, but bidirectional (VWM = 275 V), TO-277 package, RθJC = 1.5 °C/W, non-AEC-Q101 | Designed for AC line protection; unsuitable for unidirectional 85 V DC bus due to polarity mismatch and higher clamping | Not interchangeable - requires circuit redesign for polarity, mounting, and thermal interface |
Compared with SMAJ85A and V275SM36, MPLAD36KP85AE3 uniquely combines unidirectional 85 V standoff, 36 kW pulse capability, AEC-Q101 qualification, and metal-base thermal design - making it the only option for high-reliability, high-repetition DC bus protection where thermal management and aviation compliance are non-negotiable.
Availability
MPLAD36KP85AE3 is available at Aetrix Electronics and suitable for aerospace power distribution, automotive load dump protection, and industrial DC UPS inputs requiring stable component supply across extended production lifecycles.
Supply support for MPLAD36KP85AE3 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.
The MPLAD36KP series targets high-energy transient suppression in mission-critical DC power systems - emphasizing thermal robustness, multi-stroke endurance, and compliance with RTCA DO-160 and AEC-Q101 standards.
FAQ
What is the clamping voltage of MPLAD36KP85AE3 at its rated peak pulse current?
The MPLAD36KP85AE3 has a maximum clamping voltage (VC) of 137 V when subjected to its rated peak pulse current of 263 A under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01216 datasheet and ensures downstream components remain within safe operating voltage limits during surge events. The clamping occurs within <100 ps, minimizing transient exposure time.
Is MPLAD36KP85AE3 suitable for automotive under-hood applications?
Yes, MPLAD36KP85AE3 is AEC-Q101 qualified and rated for junction temperatures from –55°C to +150°C, making it suitable for under-hood automotive environments. Its 85 V VWM aligns with 24 V and 48 V battery systems, and its 36 kW surge rating meets ISO 7637-2 Pulse 5a requirements when properly mounted on thermally enhanced PCBs.
Does MPLAD36KP85AE3 require dry packing or special handling per J-STD-020?
No, MPLAD36KP85AE3 is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and does not require dry packing, baking, or humidity-controlled storage prior to reflow soldering - simplifying manufacturing logistics and reducing assembly risk.
How is thermal management implemented for MPLAD36KP85AE3 in high-power applications?
MPLAD36KP85AE3 uses a metal-base PLAD package where the cathode forms an integral thermal interface. Effective thermal management requires soldering the metal baseplate to a minimum 10 cm² copper area (2 oz Cu) with ≥4 thermal vias. This achieves the specified 1.0 °C/W junction-to-case resistance and supports 71 W steady-state dissipation at 100°C case temperature.
What standards does MPLAD36KP85AE3 meet for lightning protection?
MPLAD36KP85AE3 is validated for RTCA DO-160 Section 22 multi-stroke lightning testing (Waveform 4 and 5A) and IEC 61000-4-5 secondary lightning protection up to Class 4 with 2 Ω source impedance. Its 36 kW rating and fast response enable compliance in aircraft power distribution units and rail signaling systems where repeated surge resilience is critical.
MPLAD36KP85AE3 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):
- 85V
- Voltage - Breakdown (Min):
- 94.4V
- Voltage - Clamping (Max) @ Ipp:
- 137V
- Current - Peak Pulse (10/1000µs):
- 263A
- 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
MPLAD36KP85AE3 FAQ
1.How can I place an order for MPLAD36KP85AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP85AE3 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 MPLAD36KP85AE3 reliable?
The price and inventory of MPLAD36KP85AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP85AE3 is usually 5 days.
3.What payment methods are accepted for MPLAD36KP85AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP85AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP85AE3?
MPLAD36KP85AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP85AE3 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 MPLAD36KP85AE3?
For technical support, including MPLAD36KP85AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP85AE3 requirements.
6.How does Aetrix verify that MPLAD36KP85AE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP85AE3 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 MPLAD36KP85AE3 meets industry standards.
7.What is the process for return or replacement of MPLAD36KP85AE3?
All MPLAD36KP85AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP85AE3, 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 MPLAD36KP85AE3 part is unused and in its original packaging.
Return procedure for MPLAD36KP85AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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