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Microchip Technology MAPLAD18KP36AE3
- Part No.:
- MAPLAD18KP36AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP36AE3.pdf
- Description:
- TVS DIODE 36VWM 58.1VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,349
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Product details
Overview
MAPLAD18KP36AE3 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace and automotive systems. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 36 V reverse standoff voltage (VWM), clamps to ≤58.1 V at 310 A peak impulse current, and meets RTCA DO-160F Waveform 4 Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection requirements.
For engineers reviewing the MAPLAD18KP36AE3 datasheet, MAPLAD18KP36AE3 pinout, MAPLAD18KP36AE3 application, or MAPLAD18KP36AE3 equivalent, key selection criteria include its 36 V working voltage, low 0.7 °C/W junction-to-case thermal resistance, RoHS-compliant e3 plating, 12.32–12.57 mm body length, and cathode-on-base polarity configuration for PCB-level transient suppression in high-reliability avionics and vehicle ECUs.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuitry, activating above its 36 V standoff threshold to divert surge energy to ground. Its silicon avalanche structure enables sub-100 ps response time and stable breakdown voltage (40.0–44.2 V at I(BR)), while the metal-base package ensures efficient heat dissipation during multi-stroke events like lightning-induced transients.
It supports dual compliance paths: RTCA DO-160F Section 22 for aircraft lightning (Waveform 4, Level 4 up to 25 °C) and IEC 61000-4-5 with 42 Ω, 12 Ω, or 2 Ω source impedances - enabling use in both primary and secondary protection stages of MIL-STD-704/DO-160-compliant power entry and signal interface circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 18,000 W @ 10/1000 μs - sustains full-rated surge energy without degradation under standard lightning test waveform |
| Reverse Standoff Voltage (VWM) | 36 V - maximum continuous DC or RMS operating voltage before clamping initiates |
| Clamping Voltage (VC) | ≤58.1 V @ 310 A - limits downstream voltage stress to safe levels during worst-case surge |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables direct thermal coupling to heatsink or copper pour for multi-pulse reliability |
| Moisture Sensitivity Level | Level 1 per J-STD-020B - no dry pack or bake required prior to reflow soldering |
| RoHS Compliance | e3 matte-tin plating - lead-free, halogen-free, and compatible with standard Pb-free reflow profiles |
| Operating Temperature Range | −55 °C to +150 °C - qualified for extended-range environments including engine bays and avionics bays |
Pinout & Package
The MAPLAD18KP36AE3 uses a surface-mount plastic package with metal base cathode termination. The device has two terminals: anode (top metallization) and cathode (entire bottom metal surface), requiring a dedicated thermal pad on PCB for optimal heat transfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Positive terminal for unidirectional conduction path | Connected to protected line; conducts only when line voltage exceeds cathode reference by >V(BR) |
| Cathode | Ground-reference terminal and thermal path | Must be soldered to large copper area or heatsink; serves as both electrical return and primary heat sink interface |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMT construction | Height ≤0.64 mm - fits under low-clearance shields and enables dense board layouts in compact avionics modules |
| Multi-stroke lightning compliance | RTCA DO-160F Section 22 Waveform 4 Level 4 - validated for repeated 6.4/69 μs surges without parameter shift |
| Traceable wafer and assembly lots | Full lot traceability per MIL-PRF-19500 - supports AEC-Q101 qualification and high-reliability program audits |
| Steady-state power handling | 2.5 W @ TA = 25 °C - supports continuous bias monitoring in always-on protection circuits |
| ESD/EFT immunity | IEC 61000-4-2 (±15 kV air, ±8 kV contact) and IEC 61000-4-4 (4 kV) - protects against system-level electrostatic and burst noise |
Applications
| Aircraft Power Entry Protection | Automotive Load Dump Suppression |
|---|---|
Use Scenario: 28 V DC power input stage of flight control computer subjected to DO-160F Section 22 lightning-induced transients. IC Role / Device Role / Timing Role: Primary parallel clamping TVS protecting upstream DC-DC converter input from >10 kA surge currents. Use Value: Limits clamped voltage to ≤58.1 V, preventing overvoltage damage to 40 V-rated input capacitors and MOSFETs. | Use Scenario: 12 V battery-fed engine control unit exposed to ISO 7637-2 Pulse 5a load dump events up to 120 V. IC Role / Device Role / Timing Role: Secondary surge limiter placed after upstream LC filter to absorb residual energy not attenuated by passive components. Use Value: Clamps 310 A peak current within 100 ps, reducing voltage overshoot to <60 V and preserving MCU supply rail integrity. |
| Industrial Motor Drive I/O Protection | Railway Signaling Interface Protection |
Use Scenario: Digital I/O lines of servo drive controller connected to field sensors in electrically noisy factory environments. IC Role / Device Role / Timing Role: Point-of-entry TVS on RS-485 or CAN bus lines to suppress coupled RFI and switching transients from nearby VFDs. Use Value: Provides 18 kW surge capacity while maintaining <10 μA standby leakage at 36 V, ensuring signal integrity and low power loss. | Use Scenario: Ethernet and serial communication ports of track-side signaling equipment subject to induced surges from nearby traction currents. IC Role / Device Role / Timing Role: Secondary protection element compliant with EN 50121-4 for railway EMC, installed after gas discharge tube primary stage. Use Value: Delivers precise 36 V clamping threshold aligned with 48 V nominal signaling rails, minimizing false triggering during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | 600 W PPP rating, 5.0 mm × 3.5 mm SMB package, RθJC ≈ 25 °C/W | Limited to single-stroke industrial use; not qualified for DO-160F or AEC-Q101 | Select when cost-sensitive, non-aerospace designs require basic 36 V clamping with lower surge energy demands |
| SMCJ36A | 1500 W PPP rating, 7.1 mm × 6.2 mm SMC package, RθJC ≈ 10 °C/W | Supports higher repetition rates than SMBJ but lacks DO-160F validation and metal-base thermal performance | Choose for automotive ECU front-end protection where 1.5 kW peak power suffices and board space allows larger footprint |
Compared with SMBJ36A and SMCJ36A, MAPLAD18KP36AE3 provides 30× higher peak pulse power, 35× lower thermal resistance, and formal DO-160F/IEC 61000-4-5 certification - making it uniquely suitable for certified airborne systems and mission-critical automotive safety domains where multi-stroke reliability is mandatory.
Availability
MAPLAD18KP36AE3 is available at Aetrix Electronics and suitable for aircraft power systems, automotive electronic control units, industrial motor drives, and railway signaling interfaces requiring stable component supply across long production lifecycles.
Supply support for MAPLAD18KP36AE3 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 PLAD family was developed specifically for high-energy transient suppression in certified avionics and automotive safety systems, emphasizing thermal robustness, multi-stroke endurance, and regulatory compliance over standard commercial TVS diodes.
FAQ
What is the clamping voltage specification for MAPLAD18KP36AE3 at its rated peak pulse current?
The MAPLAD18KP36AE3 has a maximum clamping voltage (VC) of 58.1 V at 310 A peak pulse current under 10/1000 μs waveform conditions. This value is measured per Figure 3 in the RF01215 datasheet and defines the upper voltage limit imposed on protected circuitry during full-rated surge events. The clamping behavior remains stable across temperature due to the device's specified 40 mV/°C breakdown voltage coefficient.
Does MAPLAD18KP36AE3 meet AEC-Q101 qualification requirements for automotive applications?
Yes, MAPLAD18KP36AE3 is tested in accordance with AEC-Q101 requirements as stated in the RF01215 datasheet. It undergoes stress testing including HTGB, HTRB, TST, and surge validation per AEC-Q101 Rev D, supporting its use in automotive powertrain and chassis control modules where high-reliability transient suppression is mandated.
How is thermal management implemented for MAPLAD18KP36AE3 in high-duty-cycle applications?
MAPLAD18KP36AE3 relies on its 0.7 °C/W junction-to-case thermal resistance and metal-base construction to transfer heat directly to the PCB copper pour or external heatsink. The datasheet specifies case temperature control per Note 4, and steady-state power dissipation is limited to 2.5 W at 25 °C ambient. For multi-pulse operation, derating per Figure 6 must be applied based on actual lead temperature.
What does the "E3" suffix indicate in MAPLAD18KP36AE3?
Per the MPLAD nomenclature guide in RF01215, the "E3" suffix denotes RoHS-compliant matte-tin plating on the terminals. This confirms lead-free, halogen-free finish meeting JEDEC J-STD-020B Level 1 moisture sensitivity, eliminating need for dry packing and enabling compatibility with Pb-free reflow soldering processes up to 260 °C.
Can MAPLAD18KP36AE3 be used for bidirectional transient suppression?
No, MAPLAD18KP36AE3 is unidirectional, as indicated by the "A" (not "CA") suffix in its part number. Bidirectional variants such as MAPLAD18KP36CA exist for AC-coupled or symmetrical signal line protection. Using MAPLAD18KP36AE3 on bidirectional lines would result in forward conduction during negative excursions, potentially damaging the device or circuit.
MAPLAD18KP36AE3 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):
- 36V
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 310A
- Power - Peak Pulse:
- 18000W (18kW)
- 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
MAPLAD18KP36AE3 FAQ
1.How can I place an order for MAPLAD18KP36AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP36AE3 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 MAPLAD18KP36AE3 reliable?
The price and inventory of MAPLAD18KP36AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP36AE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP36AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP36AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP36AE3?
MAPLAD18KP36AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP36AE3 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 MAPLAD18KP36AE3?
For technical support, including MAPLAD18KP36AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP36AE3 requirements.
6.How does Aetrix verify that MAPLAD18KP36AE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP36AE3 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 MAPLAD18KP36AE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP36AE3?
All MAPLAD18KP36AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP36AE3, 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 MAPLAD18KP36AE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP36AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP36AE3 Tags
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