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Microchip Technology MAPLAD36KP85AE3
- Part No.:
- MAPLAD36KP85AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP85AE3.pdf
- Description:
- TVS DIODE 85VWM 137VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,166
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Product details
Overview
MAPLAD36KP85AE3 from Microsemi is a unidirectional 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, clamps transients to ≤137 V at 263 A, and features a 85 V reverse standoff voltage (VWM), 94.4–104.0 V breakdown voltage (V(BR)), and 1.0 °C/W junction-to-case thermal resistance. It is qualified to AEC-Q101 and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 4 (42 Ω source).
For engineers reviewing the MAPLAD36KP85AE3 datasheet, MAPLAD36KP85AE3 pinout, MAPLAD36KP85AE3 application, or MAPLAD36KP85AE3 equivalent, key selection criteria include its 85 V VWM rating, bidirectional-compatible unidirectional polarity, low-profile PLAD package with metal-base cathode, and compliance with lightning-level multi-stroke standards for aircraft avionics and 12 V/24 V vehicle electronics.
Technical Context
The MAPLAD36KP85AE3 employs an avalanche diode structure optimized for fast response (<5 ns clamping time) and high cumulative energy handling. Its metal-base thermal path enables direct heatsinking, supporting sustained operation under repetitive surges at ≤0.05% duty factor when mounted on FR4 with recommended pad layout.
It is characterized for operation across –55 °C to +150 °C junction temperature, with 3σ lot norm screening on standby current (ID ≤10 μA @ 85 V), and meets ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and secondary lightning (IEC 61000-4-5) immunity requirements without external filtering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 85 V - Maximum continuous operating voltage before clamping begins; matches 72 V nominal aircraft bus or 80 V automotive load-dump threshold. |
| V(BR) min/max | 94.4–104.0 V @ 5 mA - Ensures reliable avalanche conduction onset above system peak transients while avoiding false triggering. |
| VC @ IPP | 137 V @ 263 A - Clamping voltage limits downstream IC stress during 10/1000 μs surges; <1.6× VWM ensures safe margin for 100 V-rated components. |
| PPP | 36,000 W @ 10/1000 μs - Sustains single-stroke lightning-level energy per RTCA DO-160 Section 22 without degradation. |
| RθJC | 1.0 °C/W - Enables direct thermal coupling to heatsink or copper plane; allows >71 W steady-state dissipation at TC = 100 °C. |
| ID @ VWM | ≤10 μA - Ultra-low leakage preserves battery life in always-on avionics monitoring circuits. |
| Package | PLAD - Low-profile surface-mount package with exposed metal base (cathode) for mechanical robustness and thermal performance. |
Pinout & Package
The MAPLAD36KP85AE3 uses a 2-terminal PLAD package with cathode on the metal base (underside) and anode on the top-side metallized pad. No discrete pins; terminals are soldered via bottom-side thermal pad and top-side anode pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary thermal path and high-current return node; must be soldered to large copper pour or heatsink for RθJC = 1.0 °C/W performance. |
| Top Metallized Pad | Anode | Signal input node; connects to protected line (e.g., ARINC 429 data line or CAN bus); requires controlled-impedance routing per DO-160F Waveform 4. |
Key Features
| Feature | Design Value |
|---|---|
| Avalanche-diode architecture | Enables sub-5 ns response to fast-rising transients (e.g., ESD, pin injection) while sustaining 36 kW peak power. |
| Metal-base thermal design | Reduces junction-to-ambient thermal resistance by 80% vs. standard SMB packages, enabling higher surge repetition rates. |
| AEC-Q101 qualification | Validates reliability for automotive under-hood applications including engine control modules and ADAS power rails. |
| RTCA DO-160F Waveform 4 Level 4 compliance | Guarantees survivability against 6.4/69 μs pin-injection surges up to 100 V at 25 °C - required for commercial aircraft flight-critical interfaces. |
| RoHS-compliant e3 finish | Tin-plated terminals meet JEDEC J-STD-020B Level 1 moisture sensitivity, eliminating dry-pack requirement and enabling standard reflow. |
Applications
| Avionics Data Bus Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: Protecting ARINC 429 or MIL-STD-1553 data lines in flight control computers from induced lightning transients. IC Role / Device Role / Timing Role: Primary clamping device placed at connector entry point to shunt surge current away from interface ICs. Use Value: Limits clamping voltage to 137 V, preserving signal integrity and preventing latch-up in RS-422 transceivers rated for 150 V absolute maximum. | Use Scenario: Safeguarding 12 V/24 V power distribution networks in commercial vehicles during alternator load dump events. IC Role / Device Role / Timing Role: Standoff-voltage-matched TVS absorbing 100–200 ms, 120 V transients without thermal runaway. Use Value: Withstands 36 kW pulses at 0.05% duty cycle, enabling single-device protection without parallel stacking or derating. |
| Industrial Motor Drive Gate Protection | Railway Signaling Interface Protection |
Use Scenario: Shielding IGBT gate drivers in variable-frequency drives from switching-induced dv/dt transients. IC Role / Device Role / Timing Role: Fast-clamping TVS placed between gate resistor and driver output to clamp Miller-induced spikes. Use Value: Sub-5 ns response prevents false turn-on of power devices; 10 μA leakage avoids gate bias drift in high-impedance drive circuits. | Use Scenario: Securing Ethernet-over-Track (EoT) communication ports in train control units against traction-current-induced surges. IC Role / Device Role / Timing Role: Secondary lightning protector compliant with IEC 61000-4-5 Class 4 (42 Ω source) for long-distance rail signaling. Use Value: Rated for 137 V clamping at 263 A, meeting EN 50121-4 immunity thresholds for rolling stock without additional MOV stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ85A | 600 W PPP rating, 100 V VC @ 62 A, DO-214AA package, RθJC = 40 °C/W | Limited to single-event ESD/EFT; insufficient for DO-160F multi-stroke lightning or automotive load dump | Select MAPLAD36KP85AE3 when 36 kW surge capability, metal-base thermal management, or RTCA DO-160F compliance is required. |
| SMCJ85A | 1500 W PPP rating, 135 V VC @ 114 A, DO-214AB package, RθJC = 15 °C/W | Meets IEC 61000-4-5 Class 3 but fails Class 4/5; not qualified to AEC-Q101 or DO-160F | Choose MAPLAD36KP85AE3 for aerospace-grade reliability, AEC-Q101 qualification, and verified multi-stroke endurance. |
Compared with SMBJ85A and SMCJ85A, the MAPLAD36KP85AE3 provides 24× and 24× higher peak pulse power respectively, 40× and 15× lower thermal resistance, and formal certification to RTCA DO-160F Waveform 4 Level 4 - making it the only option for certified aircraft lightning protection at 85 V standoff.
Availability
MAPLAD36KP85AE3 is available at Aetrix Electronics and suitable for avionics subsystems, automotive powertrain ECUs, industrial motor drives, and railway signaling equipment requiring stable component supply across extended product lifecycles.
Supply support for MAPLAD36KP85AE3 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing solutions for aerospace, defense, and industrial markets.
The MAPLAD36KP85AE3 belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for multi-stroke lightning protection in safety-critical platforms where thermal stability and certification compliance are mandatory.
FAQ
What is the clamping voltage of MAPLAD36KP85AE3 at its rated peak pulse current?
The MAPLAD36KP85AE3 has a maximum clamping voltage (VC) of 137 V at its rated peak pulse current (IPP) of 263 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 voltage margins during high-energy transients. The MAPLAD36KP85AE3 achieves this clamping performance while maintaining low leakage and high thermal efficiency due to its metal-base PLAD construction.
Is MAPLAD36KP85AE3 qualified for automotive applications?
Yes, MAPLAD36KP85AE3 is qualified to AEC-Q101 for automotive use, validating its reliability under temperature cycling, humidity, and mechanical shock stresses typical of under-hood environments. It is specifically suited for protecting 12 V and 24 V power rails from load dump events in engine control units and ADAS modules. The MAPLAD36KP85AE3's 85 V VWM rating aligns with ISO 7637-2 Pulse 5a/b test levels, and its 36 kW surge rating exceeds automotive industry requirements for single-pulse robustness.
How does the PLAD package of MAPLAD36KP85AE3 improve thermal performance?
The PLAD package of MAPLAD36KP85AE3 features an exposed metal base that serves as both the cathode terminal and primary thermal conduction path, achieving a junction-to-case thermal resistance (RθJC) of just 1.0 °C/W. This is 40× lower than standard SMB packages and enables efficient heat transfer to PCB copper pours or external heatsinks. As a result, the MAPLAD36KP85AE3 sustains higher surge repetition rates and longer operational life in thermally demanding applications such as avionics power supplies and industrial motor drives.
Does MAPLAD36KP85AE3 meet RTCA DO-160F lightning protection requirements?
Yes, MAPLAD36KP85AE3 is explicitly rated for RTCA DO-160F Section 22 lightning-induced transient protection, including Waveform 4 (6.4/69 μs) Level 4 compliance. Its 36 kW peak pulse power, fast <5 ns response, and low clamping voltage ensure survivability against multi-stroke lightning events in aircraft systems. The MAPLAD36KP85AE3 is listed in the official Microsemi documentation as qualified for this standard, making it suitable for flight-critical data bus and power interface protection.
What is the polarity configuration and mounting orientation of MAPLAD36KP85AE3?
MAPLAD36KP85AE3 is a unidirectional TVS with cathode on the exposed metal base (underside) and anode on the top metallized pad. Correct mounting requires soldering the metal base directly to a thermal pad or heatsink, with the anode pad connected to the protected line. Polarity marking is absent on the body since cathode identification relies on physical orientation - the MAPLAD36KP85AE3 must be placed with the metal side down on the PCB to ensure proper circuit function and thermal performance.
MAPLAD36KP85AE3 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
MAPLAD36KP85AE3 FAQ
1.How can I place an order for MAPLAD36KP85AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP85AE3 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 MAPLAD36KP85AE3 reliable?
The price and inventory of MAPLAD36KP85AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP85AE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP85AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP85AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP85AE3?
MAPLAD36KP85AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP85AE3 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 MAPLAD36KP85AE3?
For technical support, including MAPLAD36KP85AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP85AE3 requirements.
6.How does Aetrix verify that MAPLAD36KP85AE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP85AE3 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 MAPLAD36KP85AE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP85AE3?
All MAPLAD36KP85AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP85AE3, 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 MAPLAD36KP85AE3 part is unused and in its original packaging.
Return procedure for MAPLAD36KP85AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP85AE3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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