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Microchip Technology MAPLAD18KP70CAE3
- Part No.:
- MAPLAD18KP70CAE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP70CAE3.pdf
- Description:
- TVS DIODE 7VWM 12VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:4,623
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Product details
Overview
MAPLAD18KP70CAE3 from Microsemi is a bidirectional 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, clamps at ≤113 V under 100 A peak impulse current, and features a 70 V reverse standoff voltage (VWM) with ±5% breakdown tolerance (77.8–86.0 V). It is qualified to AEC-Q101 and meets RTCA DO-160F Level 4 pin injection for lightning protection.
For engineers reviewing the MAPLAD18KP70CAE3 datasheet, MAPLAD18KP70CAE3 pinout, MAPLAD18KP70CAE3 application, or MAPLAD18KP70CAE3 equivalent, key selection criteria include its bidirectional polarity, 70 V VWM rating, 113 V max clamping voltage at IPP, compliance with IEC 61000-4-5 (42 Ω, 12 Ω, 2 Ω source), and qualification per RTCA DO-160 Section 22 for multi-stroke lightning.
Technical Context
This TVS diode employs an avalanche breakdown mechanism optimized for fast response (<5 ns clamping rise time) and low thermal resistance (RθJC = 0.7 °C/W) to sustain repeated high-energy transients. Its void-free thermosetting epoxy package enables direct metal-base heat sinking, supporting stable operation under duty cycles ≤0.05%.
It is rated for junction temperatures from –55°C to +150°C and provides ESD immunity per IEC 61000-4-2 (±15 kV air, ±8 kV contact) and EFT protection per IEC 61000-4-4 (40 A, 5/50 ns). Secondary lightning protection is validated across Class 1–5 per IEC 61000-4-5 with multiple source impedances (42 Ω, 12 Ω, 2 Ω).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 18,000 W @ 10/1000 μs - sustains aircraft-grade lightning surges without failure |
| Reverse Standoff Voltage (VWM) | 70 V - maximum continuous operating voltage before conduction begins |
| Clamping Voltage (VC) | ≤113 V @ 100 A IPP - limits downstream voltage stress during surge events |
| Breakdown Voltage (V(BR)) | 77.8–86.0 V @ I(BR) - defines precise avalanche onset range for predictable triggering |
| Thermal Resistance (Junction-to-Case) | 0.7 °C/W - enables efficient heat transfer to PCB copper or heatsink |
| Standby Current (ID) | ≤10 μA @ 70 V - ensures negligible leakage in standby circuits |
| Polarity | Bidirectional (CA suffix) - protects AC lines or differential signals from both polarities |
Pinout & Package
MAPLAD18KP70CAE3 uses a surface-mount PLAD package with two terminals: cathode and anode formed on opposite sides of the metal base. The device has no traditional "pins"; instead, it features a bottom-side metal cathode terminal and top-side metallized anode pad, enabling low-inductance mounting directly to thermal pads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Metal Base (Bottom) | Cathode | Primary heat path and return path for surge current; must be soldered to large copper pour for thermal management |
| Top Metallization | Anode | Signal-side connection point; low-inductance layout minimizes voltage overshoot during fast transients |
Key Features
| Feature | Design Value |
|---|---|
| RTCA DO-160F Waveform 4 Compliance | Level 4 validated (6.4/69 μs, 25°C) - certified for aircraft avionics pin-injection immunity |
| IEC 61000-4-5 Lightning Protection | Class 1–5 support with 42 Ω, 12 Ω, and 2 Ω source impedances - covers primary and secondary protection tiers |
| Moisture Sensitivity Level | MSL Level 1 - no dry pack or bake-out required prior to reflow |
| AEC-Q101 Qualification | Qualified for automotive underhood applications - validated for temperature cycling, HTRB, and surge endurance |
| RoHS Compliance | e3 marking - matte-tin plating compatible with lead-free assembly processes |
Applications
| Aerospace Avionics Power Input | Automotive Load Dump Protection |
|---|---|
Use Scenario: 28 V DC power bus in flight control computers exposed to DO-160 Section 22 lightning-induced transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed at board-level input filter stage. Use Value: Limits transient voltage to ≤113 V, protecting downstream DC/DC converters and FPGAs without derating margin loss. | Use Scenario: 12 V/24 V battery-fed ECUs subjected to ISO 7637-2 Pulse 5a load dump events up to 120 V. IC Role / Device Role / Timing Role: Primary overvoltage clamp mounted directly at connector entry point. Use Value: Absorbs 18 kW surge energy within <5 ns, preventing latch-up or gate oxide damage in microcontrollers. |
| Industrial Motor Drive Control Inputs | Railway Signaling Interface Protection |
Use Scenario: Digital I/O lines in servo drives connected to field sensors in electrically noisy factory environments. IC Role / Device Role / Timing Role: Bidirectional transient suppressor on RS-485 or encoder feedback lines. Use Value: Suppresses EFT bursts (IEC 61000-4-4) and induced RFI while maintaining signal integrity below 100 MHz. | Use Scenario: 72 V DC signaling interfaces in train-mounted communication modules subject to EN 50121-3-2 rail EMC requirements. IC Role / Device Role / Timing Role: Secondary lightning protector on trackside data links compliant with IEC 61000-4-5 Class 4 (42 Ω source). Use Value: Provides repeatable clamping performance across >1,000 surge cycles, meeting railway lifecycle reliability targets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CA | 600 W PPP rating, SMC package, higher RθJA (40 °C/W), lower IPP (100 A) | Not suitable for DO-160 Level 4 or IEC 61000-4-5 Class 4; limited to consumer/industrial grade | Select only for cost-sensitive non-aerospace designs where 18 kW surge capacity is unnecessary |
| SMCJ70CA | 1500 W PPP, same SMC package, RθJC ≈ 2.5 °C/W, clamping VC = 115 V @ 100 A | Lacks AEC-Q101 and DO-160 qualification; not validated for multi-stroke lightning | Acceptable for automotive infotainment but not for safety-critical ADAS or avionics power rails |
Compared with MAPLAD18KP70CAE3, SMBJ70CA and SMCJ70CA offer lower surge capacity, reduced thermal performance, and no formal aerospace qualification-making them unsuitable for applications requiring RTCA DO-160F Level 4 or IEC 61000-4-5 Class 4 compliance.
Availability
MAPLAD18KP70CAE3 is available at Aetrix Electronics and suitable for aerospace avionics, automotive powertrain electronics, and industrial motor drive systems requiring stable component supply, long-term obsolescence management, and traceable sourcing.
Supply support for MAPLAD18KP70CAE3 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 MAPLAD18KP70CAE3 belongs to Microsemi's high-power PLAD TVS family, engineered specifically for multi-stroke lightning protection in mission-critical platforms including aircraft, rail, and heavy-duty vehicles.
FAQ
What does the 'CA' suffix indicate in MAPLAD18KP70CAE3?
The 'CA' suffix in MAPLAD18KP70CAE3 denotes bidirectional polarity, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. This is essential for protecting AC-coupled interfaces, differential buses, or ungrounded power systems where polarity reversal may occur during surge events. MAPLAD18KP70CAE3 is not interchangeable with unidirectional variants like MAPLAD18KP70AE3.
Is MAPLAD18KP70CAE3 qualified to AEC-Q101?
Yes, MAPLAD18KP70CAE3 is fully qualified to AEC-Q101 for discrete semiconductors, including stress tests for temperature cycling, high-temperature reverse bias (HTRB), and surge current endurance. This qualification confirms its suitability for automotive underhood applications such as engine control units and battery management systems where reliability under thermal and electrical stress is critical. MAPLAD18KP70CAE3 maintains full specification compliance throughout its qualified temperature range (–55°C to +150°C).
What is the maximum clamping voltage of MAPLAD18KP70CAE3 at rated peak current?
The maximum clamping voltage (VC) of MAPLAD18KP70CAE3 is 113 V when subjected to a 100 A peak impulse current (IPP) under the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and forms the basis for downstream circuit protection design. Engineers must ensure that all protected components have voltage ratings exceeding 113 V to avoid overstress during worst-case surge conditions. MAPLAD18KP70CAE3 achieves this clamping level with <5 ns response time.
Does MAPLAD18KP70CAE3 require moisture sensitivity handling before reflow?
No, MAPLAD18KP70CAE3 is rated Moisture Sensitivity Level (MSL) 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions without dry packing or baking. This eliminates moisture-related popcorning risk during lead-free reflow and simplifies manufacturing logistics. The device's void-free epoxy body and annealed matte-tin plating further ensure robust solderability without preconditioning. MAPLAD18KP70CAE3 is fully compatible with standard SMT assembly processes.
How does MAPLAD18KP70CAE3 meet RTCA DO-160F lightning standards?
MAPLAD18KP70CAE3 is validated for RTCA DO-160F Section 22 Waveform 4 (6.4/69 μs) at Level 4 and Waveform 5A (40/120 μs) at Level 4 for 70 V VWM devices. It achieves this through low-inductance construction, sub-5 ns clamping response, and thermal design enabling multi-stroke endurance. Test reports confirm compliance with cumulative heating limits and voltage overshoot thresholds defined in DO-160F. MAPLAD18KP70CAE3 is documented in Microsemi's RF01215 Rev B as qualified for aircraft-level lightning protection.
MAPLAD18KP70CAE3 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 1500A (1.5kA)
- 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
MAPLAD18KP70CAE3 FAQ
1.How can I place an order for MAPLAD18KP70CAE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP70CAE3 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 MAPLAD18KP70CAE3 reliable?
The price and inventory of MAPLAD18KP70CAE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP70CAE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP70CAE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP70CAE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP70CAE3?
MAPLAD18KP70CAE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP70CAE3 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 MAPLAD18KP70CAE3?
For technical support, including MAPLAD18KP70CAE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP70CAE3 requirements.
6.How does Aetrix verify that MAPLAD18KP70CAE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP70CAE3 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 MAPLAD18KP70CAE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP70CAE3?
All MAPLAD18KP70CAE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP70CAE3, 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 MAPLAD18KP70CAE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP70CAE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP70CAE3 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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D5V0P1B2LP-7B
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
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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