My Inquiry
My Account
Microchip Technology MAPLAD18KP70AE3
- Part No.:
- MAPLAD18KP70AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- Nonstandard SMD
- Datasheet:
-
MAPLAD18KP70AE3.pdf
- Description:
- TVS DIODE 7VWM 12VC PLAD
- Quantity:
- Payment:
- Shipping:
Inventory:7,882
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MAPLAD18KP70AE3 from Microsemi is a unidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in aerospace, automotive, and industrial power systems. It delivers 18,000 W peak pulse power at 10/1000 μs, features a 70 V reverse standoff voltage (VWM), clamps to ≤113 V at 160 A peak impulse current, and exhibits 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 aircraft avionics.
For engineers reviewing the MAPLAD18KP70AE3 datasheet, MAPLAD18KP70AE3 pinout, MAPLAD18KP70AE3 application, or MAPLAD18KP70AE3 equivalent, this device is selected for secondary lightning protection per IEC 61000-4-5 (42 Ω source), ESD/EFT immunity per IEC 61000-4-2/-4, and load dump suppression where low-profile SMT mounting and traceable high-reliability screening are required.
Technical Context
This TVS diode employs an avalanche breakdown structure optimized for fast response (<100 ps) and stable clamping under multi-stroke transients. Its metal-base cathode construction enables direct thermal coupling to PCB copper or heatsinks, supporting sustained energy dissipation with RθJC = 0.7 °C/W.
It operates across –55 °C to +150 °C junction temperature, complies with RoHS (e3 marking), and is rated for 3σ lot norm screening on standby current (ID). The device is validated for RTCA DO-160F Waveform 4 (6.4/69 μs) Level 4 and IEC 61000-4-5 Class 1–5 secondary lightning protection with 42 Ω source impedance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (PPP) | 18,000 W @ 10/1000 μs - sustains full-rated surge energy without failure in single-event or low-duty-cycle multi-stroke scenarios |
| Reverse Standoff Voltage (VWM) | 70 V - maximum continuous DC or peak AC voltage the device blocks without conduction during normal operation |
| Clamping Voltage (VC) | ≤113 V @ 160 A IPP - limits downstream circuit voltage to safe levels during 10/1000 μs surges |
| Junction-to-Case Thermal Resistance | 0.7 °C/W - enables efficient heat transfer to PCB copper or external heatsink, critical for thermal reliability under repeated surges |
| Breakdown Voltage (V(BR)) | 77.8–86.0 V @ I(BR) - defines the minimum voltage at which avalanche conduction begins, ensuring predictable turn-on margin above VWM |
| Standby Current (ID) | ≤10 μA @ 70 V - guarantees negligible leakage power loss and no system-level bias interference in standby or low-power modes |
| Response Time | <100 ps - ensures sub-nanosecond reaction to fast-rising transients such as ESD or switching spikes |
Pinout & Package
MAPLAD18KP70AE3 uses a surface-mount PLAD package with a metal base acting as the cathode terminal. The package is void-free thermosetting epoxy (UL94V-0), with matte-tin RoHS-compliant plating (e3) and polarity marked by cathode location on the bottom metal surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (top metallization) | Transient current entry point | Connected to protected line; conducts surge current into cathode during overvoltage events |
| Cathode (metal base) | Transient 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 protection against severe lightning-induced surges (RTCA DO-160 Section 22) and automotive load dump without derating |
| Metal-base thermal design | RθJC = 0.7 °C/W allows direct PCB thermal coupling-no thermal vias or additional interface materials needed for baseline cooling |
| AEC-Q101 qualification | Validates robustness for automotive under-hood applications including temperature cycling, humidity, and mechanical shock |
| RTCA DO-160F Waveform 4 Level 4 compliance | Guarantees survivability against 6.4/69 μs pin-injection transients at 25 °C, required for commercial aircraft avionics interfaces |
| IEC 61000-4-5 Class 1–5 support (42 Ω source) | Meets highest severity secondary lightning test levels for industrial control cabinets and power distribution units |
Applications
| Aircraft Avionics Power Input | Automotive Engine Control Unit (ECU) |
|---|---|
Use Scenario: Protection of 28 V DC power inputs in flight management computers exposed to lightning-induced transients per RTCA DO-160F Section 22. IC Role / Device Role / Timing Role: Primary transient voltage suppressor placed directly at connector entry point to clamp surges before reaching DC-DC converters and microcontrollers. Use Value: With 18,000 W PPP and <100 ps response, MAPLAD18KP70AE3 prevents latch-up or burnout in sensitive 28 V rail components during multi-stroke lightning events. |
Use Scenario: Guarding 12 V battery-fed ECU power rails against ISO 7637-2 load dump pulses up to 120 V peak. IC Role / Device Role / Timing Role: Unidirectional TVS mounted between battery input and main regulator input to absorb 100 ms, 120 V transients without degradation. Use Value: Clamps to ≤113 V at 160 A while maintaining 70 V standoff-ensures downstream LDOs and MCUs remain within absolute maximum ratings during worst-case load dump. |
| Industrial Motor Drive DC Bus | Renewable Energy Inverter DC Link |
Use Scenario: Surge protection on 70 V-rated DC bus lines feeding IGBT gate drivers in HVAC variable-frequency drives. IC Role / Device Role / Timing Role: Secondary protection device placed after bulk capacitance to suppress commutation-induced voltage spikes and EFT noise. Use Value: Low RθJC (0.7 °C/W) and metal-base mounting allow reliable operation under repetitive 10/1000 μs switching transients without thermal runaway. |
Use Scenario: Safeguarding 700 V DC link monitoring circuits in solar inverters subjected to grid-switching transients and nearby lightning strikes. IC Role / Device Role / Timing Role: Standoff-clamped TVS on auxiliary supply rails powering isolation amplifiers and voltage dividers sensing the main DC link. Use Value: 70 V VWM matches auxiliary rail operating range; 113 V clamping ensures ADC reference integrity and prevents op-amp saturation during surge events. |
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 SMAJ70A | Lower PPP (400 W), SMA package, RθJA = 50 °C/W, no AEC-Q101 or DO-160 qualification | Suitable for consumer-grade board-level ESD protection, not certified for aerospace or automotive safety-critical use | Select when cost-sensitive, non-safety-critical designs require basic 70 V clamping without high-energy or qualification requirements |
| Vishay VMM70 | Same 70 V VWM, but 10 kW PPP rating, TO-277 package, higher RθJC (1.2 °C/W), no RTCA DO-160F validation | Used in industrial power supplies where moderate surge energy suffices and through-hole mounting is acceptable | Choose if legacy TO-277 footprint compatibility is required and 10 kW energy handling meets system-level test margins |
Compared with MAPLAD18KP70AE3, SMAJ70A lacks the 18 kW energy capacity and aerospace qualifications, while VMM70 offers lower thermal performance and no DO-160F certification-making MAPLAD18KP70AE3 the only option meeting full RTCA DO-160F Level 4, AEC-Q101, and 18 kW surge requirements in a low-profile SMT form factor.
Availability
MAPLAD18KP70AE3 is available at Aetrix Electronics and suitable for aircraft avionics power inputs, automotive engine control units, and industrial motor drive DC buses requiring stable component supply, long-term lifecycle assurance, and traceable high-reliability screening.
Supply support for MAPLAD18KP70AE3 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 MAPLAD series was developed specifically for high-energy transient suppression in mission-critical platforms-emphasizing low thermal resistance, multi-stroke endurance, and compliance with RTCA DO-160, IEC 61000-4-5, and AEC-Q101 standards.
FAQ
What is the clamping voltage of MAPLAD18KP70AE3 at its rated peak pulse current?
The clamping voltage (VC) of MAPLAD18KP70AE3 is guaranteed ≤113 V at 160 A peak impulse current (IPP) under 10/1000 μs waveform conditions. This value is measured per JEDEC standards and ensures downstream components on a 70 V nominal rail remain within safe operating voltage limits during surge events. MAPLAD18KP70AE3 maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is MAPLAD18KP70AE3 qualified for automotive applications?
Yes, MAPLAD18KP70AE3 is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including engine control units, body control modules, and ADAS power supplies. It has passed stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life-validating reliability under under-hood conditions. MAPLAD18KP70AE3 also supports ISO 7637-2 load dump protection up to 120 V peak.
How does the metal-base package of MAPLAD18KP70AE3 improve thermal performance?
The metal base of MAPLAD18KP70AE3 serves as both the cathode terminal and primary thermal conduction path, achieving a junction-to-case thermal resistance (RθJC) of just 0.7 °C/W. When soldered to a large PCB copper area or external heatsink, this design enables rapid heat extraction during repetitive surges-preventing thermal runaway and extending device lifetime. Unlike plastic-body SMT TVS diodes, MAPLAD18KP70AE3 does not rely solely on PCB traces for cooling.
Does MAPLAD18KP70AE3 meet RTCA DO-160F lightning protection requirements?
Yes, MAPLAD18KP70AE3 is validated for RTCA DO-160F Section 22 lightning-induced transient testing and specifically certified for Waveform 4 (6.4/69 μs) Level 4 pin injection at 25 °C. It also supports multi-stroke lightning simulation per DO-160F, making it suitable for commercial aircraft avionics power inputs, data acquisition modules, and flight control interfaces where compliance is mandatory.
What is the meaning of the "E3" suffix in MAPLAD18KP70AE3?
The "E3" suffix in MAPLAD18KP70AE3 indicates RoHS-compliant matte-tin plating on all terminals, conforming to EU Directive 2011/65/EU. This finish ensures lead-free solderability per MIL-STD-750 Method 2026 and eliminates hazardous substances without compromising surge performance or thermal reliability. The "E3" marking is laser-etched on the device body for traceability.
MAPLAD18KP70AE3 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):
- 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
MAPLAD18KP70AE3 FAQ
1.How can I place an order for MAPLAD18KP70AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MAPLAD18KP70AE3 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 MAPLAD18KP70AE3 reliable?
The price and inventory of MAPLAD18KP70AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAPLAD18KP70AE3 is usually 5 days.
3.What payment methods are accepted for MAPLAD18KP70AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAPLAD18KP70AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAPLAD18KP70AE3?
MAPLAD18KP70AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAPLAD18KP70AE3 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 MAPLAD18KP70AE3?
For technical support, including MAPLAD18KP70AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAPLAD18KP70AE3 requirements.
6.How does Aetrix verify that MAPLAD18KP70AE3 is sourced from the original manufacturer or authorized distributors?
All MAPLAD18KP70AE3 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 MAPLAD18KP70AE3 meets industry standards.
7.What is the process for return or replacement of MAPLAD18KP70AE3?
All MAPLAD18KP70AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MAPLAD18KP70AE3, 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 MAPLAD18KP70AE3 part is unused and in its original packaging.
Return procedure for MAPLAD18KP70AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAPLAD18KP70AE3 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
