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Microchip Technology MAPLAD36KP85CA
- Part No.:
- MAPLAD36KP85CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD36KP85CA.pdf
- Description:
- TVS DIODE 85VWM 137VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:3,911
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Product details
Overview
MAPLAD36KP85CA 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, clamps at ≤137 V under 263 A peak impulse current, and features 78 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (94.4–104.0 V). It meets RTCA DO-160 Section 22 multi-stroke lightning requirements and IEC 61000-4-5 Class 4/5 secondary lightning protection with 42 Ω source impedance.
For engineers reviewing the MAPLAD36KP85CA datasheet, MAPLAD36KP85CA pinout, MAPLAD36KP85CA application, or MAPLAD36KP85CA equivalent, this device is selected for high-reliability DC bus protection where low clamping voltage, bidirectional symmetry, thermal robustness (RθJC = 1.0 °C/W), and MIL-PRF-19500 upscreening capability are critical design constraints.
Technical Context
The MAPLAD36KP85CA employs an avalanche diode structure optimized for fast response (<5 ns clamping time) and repeatable multi-pulse energy handling. Its void-free thermosetting epoxy package enables direct metal-base thermal conduction to PCB copper, supporting junction-to-ambient thermal resistance of 50 °C/W on FR4 with recommended pad layout.
It operates across –55 °C to +150 °C, maintains <10 μA standby current at 78 V, and exhibits +104 mV/°C temperature coefficient of breakdown voltage - enabling predictable derating in high-temperature avionics enclosures. Surge testing per AEC-Q101 ensures reliability under repetitive transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 36,000 W @ 10/1000 μs - sustains full-rated lightning surge energy without degradation over multiple strokes |
| Reverse Standoff Voltage (VWM) | 78 V - maximum continuous DC operating voltage before leakage exceeds 10 μA |
| Breakdown Voltage (V(BR)) | 94.4–104.0 V @ 5 mA - defines minimum clamping threshold under controlled test conditions |
| Max Clamping Voltage (VC) | 137 V @ 263 A - limits protected circuit voltage during worst-case 10/1000 μs surge |
| Peak Pulse Current (IPP) | 263 A - peak current handled at rated clamping voltage; determines PCB trace sizing and fuse coordination |
| Thermal Resistance (RθJC) | 1.0 °C/W - enables efficient heat transfer from junction to metal baseplate for thermal management |
| Junction Temperature Range | –55 °C to +150 °C - supports operation in engine bay, avionics bays, and uncooled industrial environments |
Pinout & Package
MAPLAD36KP85CA uses a surface-mount PLAD package with exposed metal base acting as cathode terminal for bidirectional operation. The device has two terminals: anode and cathode, both accessible via solder pads on opposite edges of the molded body. Polarity marking applies only to unidirectional variants; MAPLAD36KP85CA is bidirectional and symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode Pad | Current entry point during positive transients | Soldered to protected line; forms one side of symmetrical clamping path |
| Cathode Pad (Metal Base) | Current return path during positive transients; anode during negative transients | Direct thermal interface to PCB ground plane; must be connected to low-impedance reference |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Enables single-device protection of AC-coupled or floating DC lines without polarity concerns |
| Low-profile surface-mount construction | Height ≤ 0.210 in (5.33 mm); fits constrained avionics modules and automotive ECUs |
| MIL-PRF-19500 upscreening option | Supports high-reliability programs requiring lot traceability, burn-in, and parametric screening |
| RTCA DO-160F Waveform 4 & 5A compliance | Validated for Level 4/5 pin-injection immunity in aircraft systems (6.4/69 μs and 40/120 μs) |
| IEC 61000-4-2/4-4/4-5 certification | Meets ESD (±8 kV contact), EFT (±2 kV), and lightning surge (Class 5, 42 Ω) standards out-of-box |
Applications
| Aerospace Avionics Power Bus | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC distribution lines in flight control computers subjected to DO-160 Section 22 lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS diode providing primary clamping at bus entry point with sub-5 ns response. Use Value: Limits transient voltage to ≤137 V, preventing latch-up or damage to downstream DC-DC converters and FPGAs. |
Use Scenario: Guarding microcontroller I/O and power rails against load dump (ISO 7637-2 Pulse 5a/b) and alternator transients. IC Role / Device Role / Timing Role: High-power TVS placed at battery input to absorb >36 kW surge energy without failure. Use Value: Eliminates need for series fusing or additional MOV stages due to robust 263 A IPP rating and low RθJC. |
| Railway Signaling Interface | Industrial Motor Drive DC Link |
Use Scenario: Shielding Ethernet PHY and CAN transceivers on track-side signaling units from induced surges during lightning strikes. IC Role / Device Role / Timing Role: Secondary protection device compliant with IEC 61000-4-5 Class 4 (42 Ω source). Use Value: Maintains signal integrity by clamping transients within 137 V while surviving repeated 263 A impulses. |
Use Scenario: Safeguarding gate drivers and bus capacitors in variable-frequency drives exposed to regenerative braking spikes. IC Role / Device Role / Timing Role: Bidirectional clamp across DC link to suppress switching-induced overshoot and fault currents. Use Value: Prevents overvoltage trip events and extends capacitor lifetime by limiting peak bus voltage to 137 V. |
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 SMAJ78CA | Lower PPP (400 W), smaller SMC package, 137 V clamping at 32.4 A (not 263 A) | Suitable for low-energy consumer electronics; insufficient for DO-160 multi-stroke or automotive load dump | Select MAPLAD36KP85CA when ≥36 kW surge handling and MIL-grade reliability are required. |
| Vishay V260CH8 | Same 78 V VWM, but 26 kW PPP (vs. 36 kW), TO-277 package, higher RθJA (60 °C/W) | Acceptable for single-stroke industrial surges; lacks DO-160F Waveform 4/5A validation and upscreening path | Choose MAPLAD36KP85CA for aerospace qualification, thermal performance, and multi-stroke endurance. |
Compared with SMAJ78CA and V260CH8, MAPLAD36KP85CA provides 90× higher peak power handling, certified multi-stroke lightning resilience, and a dedicated upscreening pathway - making it the only option qualified for mission-critical avionics and heavy-duty automotive power systems.
Availability
MAPLAD36KP85CA is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain, railway signaling, and industrial motor drive applications requiring stable component supply, long-term lifecycle support, and traceable high-reliability sourcing.
Supply support for MAPLAD36KP85CA 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 MAPLAD36KP85CA belongs to Microsemi's PLAD-series high-power TVS family, engineered specifically for DO-160-compliant aircraft systems and AEC-Q101-qualified automotive electronics demanding multi-kilowatt surge resilience.
FAQ
What is the clamping voltage of MAPLAD36KP85CA at its rated peak pulse current?
The MAPLAD36KP85CA has a maximum clamping voltage (VC) of 137 V at 263 A peak pulse current (IPP) under 10/1000 μs waveform conditions. This value is guaranteed per datasheet Figure 3 and reflects worst-case voltage seen by protected circuitry during full-rated surge events. The clamping performance remains stable across –55 °C to +150 °C operating range.
Is MAPLAD36KP85CA RoHS compliant and what is its lead finish?
Yes, MAPLAD36KP85CA is RoHS compliant (e3 marking), with annealed matte-tin plating on terminals that meets MIL-STD-750 Method 2026 for solderability. The device uses void-free UL94V-0 thermosetting epoxy encapsulation and requires no dry pack per IPC/JEDEC J-STD-020B (Moisture Sensitivity Level 1).
Does MAPLAD36KP85CA support MIL-PRF-19500 screening and what levels are available?
Yes, MAPLAD36KP85CA supports optional upscreening per MIL-PRF-19500, including reliability levels M, MA, MX, and MXL as defined in the Hirel Non-Hermetic Product Portfolio. Screening includes 3σ lot norm testing on standby current (ID), wafer/assembly lot traceability, and surge testing - all documented in Microsemi's official product brochures.
How does MAPLAD36KP85CA perform under RTCA DO-160F lightning test waveforms?
MAPLAD36KP85CA is validated for RTCA DO-160F Section 22 multi-stroke lightning: Level 4 for Waveform 4 (6.4/69 μs) and Level 5 for Waveform 5A (40/120 μs) at 78 V VWM. It meets these requirements with no degradation after repeated pulses, supported by its 36 kW PPP rating and low thermal resistance (RθJC = 1.0 °C/W).
What is the thermal design guidance for mounting MAPLAD36KP85CA on FR4 PCB?
For optimal thermal performance, MAPLAD36KP85CA must be mounted on FR4 using the recommended pad layout (Ref. A=0.470", B=0.230", C=0.100") per datasheet page 6. The metal base must connect to a ≥1 in² copper pour tied to ground plane via ≥4 thermal vias. This achieves RθJA ≈ 50 °C/W and prevents junction overheating during repetitive surges.
MAPLAD36KP85CA 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
MAPLAD36KP85CA FAQ
1.How can I place an order for MAPLAD36KP85CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD36KP85CA 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 MAPLAD36KP85CA reliable?
The price and inventory of MAPLAD36KP85CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD36KP85CA is usually 5 days.
3.What payment methods are accepted for MAPLAD36KP85CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD36KP85CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD36KP85CA?
MAPLAD36KP85CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD36KP85CA 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 MAPLAD36KP85CA?
For technical support, including MAPLAD36KP85CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD36KP85CA requirements.
6.How does Aetrix verify that MAPLAD36KP85CA is sourced from the original manufacturer or authorized distributors?
All MAPLAD36KP85CA 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 MAPLAD36KP85CA meets industry standards.
7.What is the process for return or replacement of MAPLAD36KP85CA?
All MAPLAD36KP85CA units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD36KP85CA, 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 MAPLAD36KP85CA part is unused and in its original packaging.
Return procedure for MAPLAD36KP85CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD36KP85CA Tags
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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