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Microchip Technology MPLAD36KP85CAE3
- Part No.:
- MPLAD36KP85CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MPLAD36KP85CAE3.pdf
- Description:
- TVS DIODE 85VWM 137VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,887
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Product details
Overview
MPLAD36KP85CAE3 from Microsemi is a bidirectional 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 85 V reverse standoff voltage (VWM), clamps to ≤137 V at 263 A peak pulse current (IPP), and meets RTCA DO-160 Section 22 multi-stroke lightning requirements.
For engineers reviewing the MPLAD36KP85CAE3 datasheet, MPLAD36KP85CAE3 pinout, MPLAD36KP85CAE3 application, or MPLAD36KP85CAE3 equivalent, key selection criteria include its bidirectional polarity, 1.0 °C/W junction-to-case thermal resistance, RoHS-compliant matte-tin plating, UL94V-0 epoxy body, and IEC 61000-4-5 Class 5 secondary lightning protection capability with 42 Ω source impedance.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry to divert high-energy transients-such as lightning-induced surges, load dump spikes, and EFT pulses-away from downstream components. Its low dynamic impedance and sub-5 ns response time ensure rapid voltage limiting during fast-rising threats like RTCA DO-160 Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs).
The device uses a silicon avalanche structure optimized for repeatable multi-stroke performance under cumulative heating conditions. Its metal-base cathode construction enables efficient heat transfer to the PCB pad, supported by a thermal resistance of 1.0 °C/W (junction-to-case) and 50 °C/W (junction-to-ambient on FR4), making it suitable for high-reliability mounting without external heatsinks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without degradation |
| Reverse Standoff Voltage (VWM) | 85 V - maximum continuous operating voltage before clamping initiates |
| Breakdown Voltage (V(BR)) | 94.4–104.0 V @ 5 mA - ensures reliable turn-on margin above VWM |
| Clamping Voltage (VC) | ≤137 V @ 263 A IPP - limits downstream voltage stress during worst-case surge |
| Peak Pulse Current (IPP) | 263 A @ 10/1000 μs - quantifies maximum surge current the device can safely shunt |
| Thermal Resistance (RθJC) | 1.0 °C/W - enables direct PCB copper thermal path for high-duty-cycle applications |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack required, simplifies SMT handling and storage |
Pinout & Package
Package: PLAD (Plastic Leaded Anode Down) - void-free UL94V-0 thermosetting epoxy body with metal base cathode; dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H); weight: ~1.7–2.0 g; RoHS-compliant matte-tin plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Top Surface Pads) | Transient current entry point for bidirectional operation | Two symmetrical solder pads accept standard reflow profiles; forms low-inductance path into silicon junction |
| Cathode (Metal Base) | Primary heat sink and current return path | Exposed metal underside directly contacts PCB copper pour for optimal thermal conduction and mechanical stability |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Enables single-device protection of AC lines or differential buses without polarity concerns |
| RTCA DO-160F Waveform 4 & 5A compliance | Validated for Level 4/5 pin-injection immunity in avionics, eliminating need for supplemental filtering |
| AEC-Q101 qualified | Meets automotive-grade reliability for under-hood and battery-line surge protection |
| MIL-PRF-19500 upscreening option | Supports high-reliability programs requiring lot traceability, 3σ ID screening, and hermetic-level quality controls |
| IEC 61000-4-5 Class 5 rating (42 Ω) | Provides certified secondary lightning protection for long-distance wiring in aircraft and rail systems |
Applications
| Aerospace Avionics Power Bus | Automotive 48V Battery Management |
|---|---|
Use Scenario: Protection of ARINC 429 data lines and 28 V DC distribution panels against lightning-induced transients per DO-160 Section 22. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rails and signal pairs to clamp common-mode surges before they reach interface ICs. Use Value: Eliminates need for discrete RC filters or gas discharge tubes while maintaining <5 ns response and passing multi-stroke testing. | Use Scenario: Safeguarding BMS controllers and gate drivers during 48 V system load dump events (ISO 16750-2 Pulse 5a/b). IC Role / Device Role / Timing Role: Primary overvoltage clamp on main battery input, absorbing >36 kW energy without failure. Use Value: Prevents MOSFET destruction and MCU brownout by limiting rail voltage to ≤137 V during 120 V transient peaks. |
| Industrial Motor Drive DC Link | Railway Signaling Interface |
Use Scenario: Protecting IGBT gate drivers and isolated feedback circuits from switching-induced dv/dt transients in VFDs. IC Role / Device Role / Timing Role: Parallel-mounted TVS across DC link capacitors to suppress repetitive commutation spikes. Use Value: Extends capacitor life and prevents false triggering of desaturation protection due to clamped overshoot. | Use Scenario: Securing Ethernet-over-coax and RS-485 fieldbus nodes in trackside signaling cabinets exposed to induced lightning currents. IC Role / Device Role / Timing Role: Secondary protection stage after primary GDT, handling residual energy per IEC 61000-4-5 Class 5 (2 Ω source). Use Value: Enables compact, maintenance-free protection achieving 10 kV/10/700 μs immunity without derating at elevated ambient temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85CA | 600 W PPP rating, 5.0 mm × 4.5 mm SMB package, RθJC = 15 °C/W | Limited to single-stroke or low-duty-cycle surges; unsuitable for DO-160 multi-stroke validation | Select only for cost-sensitive consumer electronics where 36 kW capability is unnecessary |
| SMCJ85CA | 1500 W PPP rating, 7.2 mm × 6.2 mm SMC package, RθJC = 4.5 °C/W | Cannot meet RTCA DO-160 Level 5 pin injection or IEC 61000-4-5 Class 5 with 42 Ω source | Acceptable for basic automotive ISO 7637-2 compliance but not aerospace-grade surge resilience |
Compared with SMBJ85CA and SMCJ85CA, the MPLAD36KP85CAE3 provides 24× and 24× higher peak pulse power respectively, enabling certified multi-stroke lightning protection in safety-critical platforms where thermal accumulation and repeated surge endurance are mandatory design requirements.
Availability
MPLAD36KP85CAE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive 48V battery systems, and industrial motor drive applications requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MPLAD36KP85CAE3 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, communications, and industrial markets.
The MPLAD36KP85CAE3 belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for certified lightning and load-dump protection in mission-critical systems where multi-stroke endurance and thermal robustness are non-negotiable.
FAQ
What is the clamping voltage of MPLAD36KP85CAE3 at its rated peak pulse current?
The MPLAD36KP85CAE3 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 JEDEC standards and guarantees predictable overvoltage limiting during surge events. The MPLAD36KP85CAE3 maintains this clamping performance across its full operating temperature range of −55°C to +150°C, ensuring consistent protection in harsh environments.
Is MPLAD36KP85CAE3 compliant with automotive qualification standards?
Yes, the MPLAD36KP85CAE3 is tested and qualified to AEC-Q101 for stress testing of discrete semiconductors used in automotive applications. It meets requirements for temperature cycling, humidity bias, and surge robustness relevant to under-hood and battery-line placements. While not an AEC-Q200 passive component, its AEC-Q101 qualification confirms suitability for automotive 48V systems, including load dump protection per ISO 16750-2 Pulse 5a/b, as validated in Microsemi's application documentation for the MPLAD36KP85CAE3.
How does the PLAD package of MPLAD36KP85CAE3 improve thermal performance compared to standard SMC or SMB packages?
The PLAD package of MPLAD36KP85CAE3 features an exposed metal cathode base that serves as both electrical terminal and primary thermal path, achieving a junction-to-case thermal resistance (RθJC) of just 1.0 °C/W. In contrast, standard SMC packages typically exhibit RθJC ≥ 4.5 °C/W and SMB packages ≥ 15 °C/W. This 4.5× and 15× improvement allows the MPLAD36KP85CAE3 to dissipate 36 kW surges with minimal temperature rise, supporting multi-stroke reliability in high-thermal-load applications such as avionics and industrial drives.
Does MPLAD36KP85CAE3 support RTCA DO-160F Section 22 lightning testing?
Yes, the MPLAD36KP85CAE3 is explicitly rated for RTCA DO-160F Section 22 multi-stroke lightning testing, including Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs). It achieves Level 4 and Level 5 immunity per DO-160F when mounted per recommended pad layout on FR4. Documentation RF01216 Rev B confirms MPLAD36KP85CAE3 inclusion in the "MPLAD36KP14A to 300CA" group for Level 5 pin injection, validating its use in certified aircraft systems without supplemental protection.
What is the meaning of the 'CA' and 'E3' suffixes in MPLAD36KP85CAE3?
In MPLAD36KP85CAE3, the 'CA' suffix denotes bidirectional polarity (as opposed to 'A' for unidirectional), enabling symmetric clamping for AC or differential signal lines. The 'E3' suffix indicates RoHS-compliant matte-tin plating per JEDEC J-STD-020B Level 1 moisture sensitivity-no dry pack required-and conforms to IPC/JEDEC standards for lead-free assembly. Both suffixes are integral to the official Microsemi nomenclature and define critical electrical and process attributes of the MPLAD36KP85CAE3.
MPLAD36KP85CAE3 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):
- 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
MPLAD36KP85CAE3 FAQ
1.How can I place an order for MPLAD36KP85CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MPLAD36KP85CAE3 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 MPLAD36KP85CAE3 reliable?
The price and inventory of MPLAD36KP85CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPLAD36KP85CAE3 is usually 5 days.
3.What payment methods are accepted for MPLAD36KP85CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPLAD36KP85CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPLAD36KP85CAE3?
MPLAD36KP85CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPLAD36KP85CAE3 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 MPLAD36KP85CAE3?
For technical support, including MPLAD36KP85CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPLAD36KP85CAE3 requirements.
6.How does Aetrix verify that MPLAD36KP85CAE3 is sourced from the original manufacturer or authorized distributors?
All MPLAD36KP85CAE3 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 MPLAD36KP85CAE3 meets industry standards.
7.What is the process for return or replacement of MPLAD36KP85CAE3?
All MPLAD36KP85CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MPLAD36KP85CAE3, 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 MPLAD36KP85CAE3 part is unused and in its original packaging.
Return procedure for MPLAD36KP85CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPLAD36KP85CAE3 Tags
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