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Microchip Technology MXLDA3KP18AE3
- Part No.:
- MXLDA3KP18AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 16-SMD, Gull Wing
- Datasheet:
-
MXLDA3KP18AE3.pdf
- Description:
- UNI-DIRECTIONAL TVS_16L DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,338
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Product details
Overview
MXLDA3KP18AE3 from Microsemi is a unidirectional 3000 W surface-mount transient voltage suppressor (TVS) array with 18 V standoff voltage (VWM), 20.0–22.1 V breakdown range (V(BR)), and 29.2 V maximum clamping voltage (VC) at 102.8 A peak pulse current (IPP). It delivers sub-100 ps response for ESD/EFT protection per IEC61000-4-2/4-4 and secondary lightning protection per IEC61000-4-5 in telecom power interfaces.
For engineers reviewing the MXLDA3KP18AE3 datasheet, MXLDA3KP18AE3 pinout, MXLDA3KP18AE3 application, or MXLDA3KP18AE3 equivalent, key selection criteria include its 18 V VWM rating, 29.2 V VC @ 102.8 A, RoHS-compliant e3 matte-tin plating, -55°C to +150°C operating junction temperature, and unidirectional polarity confirmed by pin 1 cathode marking.
Technical Context
This TVS array uses silicon avalanche diode technology optimized for high-energy transient suppression in DC power rails and signal lines. Its unidirectional construction enables asymmetric clamping-low forward clamping (4.0 V @ 500 A) and precise reverse standoff-making it suitable for protecting downstream ICs with defined ground-referenced inputs.
The device operates within strict thermal limits: derated linearly above 25°C per Figure 3, with full 3000 W capability only at ambient ≤25°C and junction temperature maintained ≤150°C. Its void-free UL94V-0 epoxy package ensures mechanical robustness and flame resistance in industrial and telecom enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 18 V - Maximum continuous DC or peak AC voltage the device blocks without conduction; sets minimum system operating voltage margin. |
| V(BR) Range | 20.0–22.1 V @ I(BR) = 1 mA - Confirmed avalanche onset window; ensures predictable turn-on before clamping threshold is exceeded. |
| VC @ IPP | 29.2 V @ 102.8 A (10/1000 µs) - Clamped voltage seen by protected circuit during worst-case surge; defines maximum stress on downstream components. |
| ID @ VWM | 2 µA max - Leakage current at rated standoff; low enough to avoid loading sensitive analog or low-power control circuits. |
| PPP | 3000 W @ 10/1000 µs - Peak pulse power handling capacity; validates suitability for IEC61000-4-5 Class 1–4 lightning surges with 2–42 Ω source impedance. |
| TJ/TSTG | -55°C to +150°C - Full military-grade temperature range; supports deployment in outdoor base stations, industrial PLCs, and automotive under-hood modules. |
| Moisture Sensitivity | Level 1 per J-STD-020B - No dry pack required; simplifies SMT assembly and eliminates bake-out steps in production. |
Pinout & Package
MXLDA3KP18AE3 is housed in a surface-mount, void-free thermosetting epoxy package (UL94V-0) with tin-lead or annealed matte-tin (e3) plating. Pin 1 is marked by a dot on the top surface and serves as the cathode terminal for the unidirectional TVS element.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode | Connected to protected line; conducts surge current to ground when reverse voltage exceeds V(BR); polarity-critical for correct placement. |
| Pin 2 | Anode | Connected to system ground; completes current path during transient events; must be low-inductance PCB trace to maintain clamping performance. |
Key Features
| Feature | Design Value |
|---|---|
| 3000 W Peak Pulse Power | Validated at 10/1000 µs waveform - enables single-device protection against IEC61000-4-5 lightning surges up to Class 4 (42 Ω source). |
| Sub-100 ps Response Time | Unidirectional version responds <100 ps from 0 V to V(BR) - faster than most microcontroller I/O protection requirements and critical for ESD immunity. |
| RoHS-Compliant e3 Plating | Matte-tin termination meets JEDEC J-STD-020B Level 1 - eliminates post-SMT baking and supports lead-free reflow profiles without solderability degradation. |
| Full MIL-PRF-19500 Screening Option | Available with wafer/lot traceability and 3σ standby current screening - satisfies high-reliability requirements for aerospace, defense, and medical power systems. |
| Low 2 µA Standby Leakage | Measured at 18 V VWM - prevents unintended biasing of precision sensor references or battery-powered monitoring circuits. |
Applications
| Telecom DC Power Input Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting 24 V DC power input of cellular base station remote radio units from induced lightning surges and switching transients on outdoor feeder lines. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +24 V rail and chassis ground to clamp surges before they reach DC-DC converters and PMICs. Use Value: 29.2 V clamping ensures downstream 3.3 V/5 V logic remains below absolute maximum ratings even during 102.8 A 10/1000 µs surges. | Use Scenario: Safeguarding 24 V digital input channels of programmable logic controllers exposed to relay coil flyback and motor drive noise in factory automation cabinets. IC Role / Device Role / Timing Role: TVS mounted directly at connector entry point to shunt fast transients (<100 ps rise time) before propagation into optocoupler input stages. Use Value: 2 µA leakage avoids false triggering of high-impedance input comparators; 3000 W rating handles repetitive inductive kick energy without degradation. |
| Automotive Body Control Module (BCM) Power Rail | Medical Diagnostic Equipment Sensor Interface |
Use Scenario: Securing 12 V supply rail of BCM modules subjected to load dump (ISO 7637-2 Pulse 5a) and alternator ripple in passenger vehicles. IC Role / Device Role / Timing Role: Primary overvoltage clamp in parallel with bulk capacitance, absorbing energy before LDO regulators and CAN transceivers. Use Value: -55°C to +150°C junction range supports under-hood operation; 18 V VWM aligns with nominal 12 V system + 50% tolerance for load dump overshoot. | Use Scenario: Shielding low-noise analog front-end of ECG or EEG amplifiers from ESD events during patient cable handling and equipment docking. IC Role / Device Role / Timing Role: TVS placed at SMA connector interface to divert human-body-model (HBM) ESD pulses before reaching instrumentation amplifier inputs. Use Value: Sub-100 ps response captures ESD rise times <1 ns; 4.0 V forward clamping protects against reverse-polarity misconnection during field service. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | 600 W PPP rating, same 18 V VWM and unidirectional polarity, but smaller SMB package (vs. MDA's larger body). | Lower energy handling limits use to Class 2 lightning (IEC61000-4-5, 42 Ω) and lower-duty-cycle EFT events. | Select SMBJ18A only when board space is constrained and surge exposure is limited to ESD/EFT-not primary lightning protection. |
| SMCJ18A | 1500 W PPP, same VWM and unidirectional configuration, SMC package with higher thermal mass than SMB but less than MDA. | Insufficient for Class 3/4 IEC61000-4-5 with 12 Ω or 2 Ω source impedance; validated only up to 72.5 A IPP. | Choose SMCJ18A for cost-sensitive industrial controls where 1500 W margin suffices and full 3000 W is not mandated by safety standards. |
Compared with SMBJ18A and SMCJ18A, MXLDA3KP18AE3 provides double the pulse power handling of SMCJ18A and five times that of SMBJ18A-enabling compliance with stringent Class 4 lightning immunity in telecom infrastructure without paralleling devices or adding external heat sinking.
Availability
MXLDA3KP18AE3 is available at Aetrix Electronics and suitable for telecom power input protection, industrial PLC I/O hardening, and automotive BCM power rail safeguarding requiring stable component supply across multi-year production cycles.
Supply support for MXLDA3KP18AE3 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 components for aerospace, defense, and industrial markets.
The MDA3KP series was engineered for mission-critical transient suppression in harsh environments-delivering MIL-PRF-19500 screenable, high-energy TVS performance in compact surface-mount packages for telecom, transportation, and medical power systems.
FAQ
What is the clamping voltage of MXLDA3KP18AE3 at its rated peak pulse current?
The MXLDA3KP18AE3 has a maximum clamping voltage (VC) of 29.2 V when subjected to its rated peak pulse current (IPP) of 102.8 A under the standard 10/1000 µs waveform. This value is measured per test conditions in the official Microsemi datasheet RF01243 Rev B and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. Designers must verify that downstream components tolerate this clamped voltage under all operating temperatures.
Is MXLDA3KP18AE3 suitable for bidirectional signal line protection?
No, MXLDA3KP18AE3 is a unidirectional TVS device, as indicated by the absence of the "C" suffix in its part number and confirmed by its electrical characteristics table showing only reverse standoff and breakdown parameters. For bidirectional protection-such as AC-coupled data lines or differential buses-Microsemi offers the MXLDA3KP18CE3 variant. Using MXLDA3KP18AE3 on bidirectional signals risks forward conduction during negative excursions and inadequate clamping.
Does MXLDA3KP18AE3 require moisture sensitivity handling prior to reflow soldering?
No, MXLDA3KP18AE3 is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ambient conditions without dry packing or baking. This eliminates pre-reflow bake steps in manufacturing, reduces process complexity, and avoids potential damage from thermal overstress during desiccation-critical for high-volume SMT lines producing telecom and industrial equipment.
What is the polarity configuration of MXLDA3KP18AE3 and how is it identified on the package?
MXLDA3KP18AE3 is unidirectional with Pin 1 designated as the cathode, as stated in the "MECHANICAL and PACKAGING" section of the datasheet. Polarity is physically marked by a dot on the top surface of the package adjacent to Pin 1. Correct orientation is essential: Pin 1 connects to the line being protected, while Pin 2 connects to ground. Reversal will prevent proper clamping and may cause device failure under surge conditions.
Can MXLDA3KP18AE3 be used for IEC61000-4-5 Class 4 lightning protection with 2 Ω source impedance?
Yes, MXLDA3KP18AE3 is explicitly qualified for IEC61000-4-5 Class 4 secondary lightning protection with 2 Ω source impedance, as documented in the "APPLICATIONS / BENEFITS" section of RF01243 Rev B. Its 3000 W peak pulse power rating and 102.8 A IPP capability meet the 1 kV/2 Ω test requirement. Designers must ensure low-inductance PCB layout-especially for the ground path-to preserve the sub-100 ps response and avoid voltage overshoot during fast-rising surges.
MXLDA3KP18AE3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- 16-SMD, Gull Wing
- Series:
- MDA
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 8
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 102.8A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
MXLDA3KP18AE3 FAQ
1.How can I place an order for MXLDA3KP18AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MXLDA3KP18AE3 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 MXLDA3KP18AE3 reliable?
The price and inventory of MXLDA3KP18AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXLDA3KP18AE3 is usually 5 days.
3.What payment methods are accepted for MXLDA3KP18AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXLDA3KP18AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXLDA3KP18AE3?
MXLDA3KP18AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXLDA3KP18AE3 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 MXLDA3KP18AE3?
For technical support, including MXLDA3KP18AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXLDA3KP18AE3 requirements.
6.How does Aetrix verify that MXLDA3KP18AE3 is sourced from the original manufacturer or authorized distributors?
All MXLDA3KP18AE3 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 MXLDA3KP18AE3 meets industry standards.
7.What is the process for return or replacement of MXLDA3KP18AE3?
All MXLDA3KP18AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MXLDA3KP18AE3, 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 MXLDA3KP18AE3 part is unused and in its original packaging.
Return procedure for MXLDA3KP18AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MXLDA3KP18AE3 Tags
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