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Microchip Technology MAPLAD18KP90AE3
- Part No.:
- MAPLAD18KP90AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP90AE3.pdf
- Description:
- TVS DIODE 9VWM 15.4VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:6,672
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Product details
Overview
MAPLAD18KP90AE3 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial systems. It delivers 18,000 W peak pulse power at 10/1000 μs, clamps at ≤146 V under 1000 A impulse, and features 90 V reverse standoff voltage (VWM), 100–111 V breakdown voltage (V(BR)), and 0.7 °C/W junction-to-case thermal resistance. It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection.
For engineers reviewing the MAPLAD18KP90AE3 datasheet, MAPLAD18KP90AE3 pinout, MAPLAD18KP90AE3 application, or MAPLAD18KP90AE3 equivalent, this device is selected for lightning robustness in avionics power rails, load-dump suppression in 24 V vehicle ECUs, and secondary IEC 61000-4-5 Class 3/4 protection with 42 Ω source impedance - requiring precise VWM margining, low RθJC for thermal management, and verified multi-stroke survivability.
Technical Context
This TVS operates as a silicon avalanche diode with controlled breakdown behavior, triggered when transient voltage exceeds its 90 V standoff rating. Its metal-base cathode construction enables direct thermal coupling to PCB copper or heatsinks, supporting sustained energy dissipation per MIL-STD-750 test conditions. The device exhibits <100 ps response time and maintains clamping stability across -55°C to +150°C junction temperature range.
It is characterized for 10/1000 μs waveform compliance and validated for RTCA DO-160F Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs) pin injection testing. Standby leakage current is specified at ≤10 μA @ 90 V, and temperature coefficient of V(BR) is +109 mV/°C - enabling accurate derating in high-temperature environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 90 V - maximum continuous DC or RMS operating voltage before conduction begins |
| V(BR) min/max | 100–111 V @ I(BR) - ensures reliable avalanche initiation within defined tolerance band |
| VC @ IPP | 146 V @ 1000 A - maximum clamped voltage during 10/1000 μs surge, defining protected circuit stress |
| PPP | 18,000 W @ 10/1000 μs - peak power handling capacity, critical for lightning stroke energy absorption |
| RθJC | 0.7 °C/W - enables efficient heat transfer from junction to case, supporting high-repetition-rate surges |
| ID @ VWM | ≤10 μA - ultra-low leakage preserves system standby power integrity in battery-backed applications |
| TJ range | -55°C to +150°C - supports operation in extreme environments including engine bays and avionics bays |
Pinout & Package
MAPLAD18KP90AE3 uses a surface-mount PLAD package with metal base cathode configuration. The cathode is the exposed metal underside of the device body; the anode is the top-side metallized terminal. Package dimensions: 12.32 × 10.54 × 5.08 mm (L × W × H), with recommended FR4 pad layout per RF01215 Rev B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top-side metallization) | Transient current entry point | Connected to protected line; conducts surge current into device during overvoltage event |
| Cathode (metal base) | Current return path & thermal interface | Must be soldered to large copper pour or heatsink; serves dual role as electrical return and primary thermal conduction path |
Key Features
| Feature | Design Value |
|---|---|
| 18 kW peak pulse rating | Enables single-device protection against severe lightning transients per RTCA DO-160 Section 22 without parallel staging |
| 0.7 °C/W RθJC | Reduces thermal bottleneck vs. standard SMD TVS, allowing >2× higher duty-cycle surge repetition in compact layouts |
| AEC-Q101 qualification | Validates reliability for automotive under-hood applications including 12 V/24 V ECU power inputs |
| RoHS-compliant e3 plating | Meets global environmental compliance requirements while maintaining solderability per MIL-STD-750 Method 2026 |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints, simplifying SMT assembly logistics |
Applications
| Avionics Power Input Protection | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protecting 28 V DC aircraft bus inputs from lightning-induced surges per RTCA DO-160F Section 22 Waveform 4 and 5A. IC Role / Device Role / Timing Role: Unidirectional TVS placed at board-level input filter stage to clamp transients before they reach DC-DC converters and microcontrollers. Use Value: Achieves Level 4 pin injection immunity with ≤146 V clamping, preventing latch-up or damage to downstream 3.3 V/5 V logic despite 6.4/69 μs fast-rising threats. | Use Scenario: Safeguarding 24 V supply rail of diesel engine control units against ISO 7637-2 load dump spikes and alternator ripple. IC Role / Device Role / Timing Role: Primary surge shunt on main power entry, coordinated with upstream fuse and downstream LC filtering. Use Value: Absorbs 18 kW pulses without degradation, maintaining VWM margin above nominal 27.2 V load dump peak and enabling single-device compliance with ISO 16750-2. |
| Industrial Motor Drive DC Bus | Railway Signaling Interface |
Use Scenario: Secondary protection on 400 V DC bus of variable-frequency drives exposed to switching transients and induced RFI from IGBT commutation. IC Role / Device Role / Timing Role: Fast-response TVS paralleled with bulk capacitance to suppress nanosecond-scale voltage overshoots. Use Value: Clamps within <100 ps and sustains repeated 10/1000 μs surges up to 1000 A, limiting bus overvoltage to safe levels for gate drivers and sensors. | Use Scenario: IEC 61000-4-5 Class 4 surge protection on 72 V signaling lines in trackside electronic interlocking systems. IC Role / Device Role / Timing Role: Bidirectional-capable variant used (MPLAD18KP90CA), but MAPLAD18KP90AE3 serves same family in unidirectional configurations where polarity is controlled. Use Value: Delivers 146 V clamping with 42 Ω source impedance, meeting EN 50121-4 immunity thresholds for safety-critical signaling interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ90A | 600 W PPP rating, 1.5 °C/W RθJC, 100 V V(BR) min, 142 V VC @ 30 A | Lower energy handling; suitable only for sub-system level or low-duty-cycle transients | Select SMBJ90A only when surge threat level is limited to IEC 61000-4-5 Level 2 or lower and thermal mass is constrained. |
| SMCJ90A | 1500 W PPP rating, 1.0 °C/W RθJC, 100 V V(BR) min, 146 V VC @ 100 A | Mid-tier power handling; lacks RTCA DO-160F validation and AEC-Q101 qualification | Choose SMCJ90A for cost-sensitive industrial controls where full aerospace/automotive certification is not required. |
Compared with SMBJ90A and SMCJ90A, MAPLAD18KP90AE3 provides 30× and 12× higher peak pulse power respectively, coupled with certified reliability for mission-critical environments - making it irreplaceable where multi-stroke lightning survival, thermal robustness, and regulatory compliance are mandatory.
Availability
MAPLAD18KP90AE3 is available at Aetrix Electronics and suitable for avionics power input protection, automotive engine control unit (ECU) surge suppression, and industrial motor drive DC bus protection requiring stable component supply across extended production lifecycles.
Supply support for MAPLAD18KP90AE3 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 solutions for aerospace, defense, and industrial markets.
The PLAD-series TVS family was engineered specifically for high-energy, multi-stroke transient suppression in safety-critical platforms - emphasizing thermal efficiency, waveform-specific validation, and long-term parametric stability under harsh environmental stress.
FAQ
What is the clamping voltage of MAPLAD18KP90AE3 at its rated peak pulse current?
The clamping voltage VC of MAPLAD18KP90AE3 is 146 V at 1000 A peak pulse current under 10/1000 μs waveform conditions. This value represents the maximum voltage seen by downstream circuitry during a full-rated surge event and is guaranteed per RF01215 Rev B. MAPLAD18KP90AE3 maintains this clamping performance across its operational temperature range and after multiple surge events when mounted per recommended pad layout.
Is MAPLAD18KP90AE3 qualified for automotive applications?
Yes, MAPLAD18KP90AE3 is AEC-Q101 qualified, confirming its suitability for automotive under-hood and powertrain applications. It has undergone stress testing including temperature cycling, humidity bias, and surge endurance per AEC-Q101 standards. MAPLAD18KP90AE3 is commonly deployed in 24 V ECU power inputs to withstand ISO 7637-2 load dump and ISO 16750-2 transient requirements without derating.
How does the thermal design of MAPLAD18KP90AE3 differ from standard SMD TVS diodes?
MAPLAD18KP90AE3 features a metal-base cathode that serves as both electrical return and primary thermal conduction path, achieving RθJC = 0.7 °C/W - significantly lower than typical SMD TVS devices (1.0–2.5 °C/W). This allows MAPLAD18KP90AE3 to dissipate heat directly into PCB copper or external heatsinks, enabling higher surge repetition rates and improved long-term reliability in thermally constrained designs.
Does MAPLAD18KP90AE3 meet RTCA DO-160F lightning protection requirements?
Yes, MAPLAD18KP90AE3 is validated for RTCA DO-160F Section 22 lightning-induced transient testing, including Waveform 4 (6.4/69 μs) and Waveform 5A (40/120 μs) at Level 4. Its 18 kW rating, fast <100 ps response, and low clamping voltage ensure compliance with aircraft equipment immunity requirements. MAPLAD18KP90AE3 is widely used in avionics power supplies and data acquisition modules requiring DO-160F certification.
What is the moisture sensitivity level (MSL) and reflow profile for MAPLAD18KP90AE3?
MAPLAD18KP90AE3 is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and requires no dry-pack or baking prior to reflow. Its recommended reflow profile follows JEDEC J-STD-020: peak temperature 260°C for 10 seconds, with ramp rates compliant with standard lead-free processes. The matte-tin (e3) plating ensures robust solderability per MIL-STD-750 Method 2026.
MAPLAD18KP90AE3 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 1169A (1.169kA)
- 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
MAPLAD18KP90AE3 FAQ
1.How can I place an order for MAPLAD18KP90AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP90AE3 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 MAPLAD18KP90AE3 reliable?
The price and inventory of MAPLAD18KP90AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP90AE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP90AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP90AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP90AE3?
MAPLAD18KP90AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP90AE3 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 MAPLAD18KP90AE3?
For technical support, including MAPLAD18KP90AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP90AE3 requirements.
6.How does Aetrix verify that MAPLAD18KP90AE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP90AE3 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 MAPLAD18KP90AE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP90AE3?
All MAPLAD18KP90AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP90AE3, 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 MAPLAD18KP90AE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP90AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP90AE3 Tags
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