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Microchip Technology MXLDA3KP18A
- Part No.:
- MXLDA3KP18A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 16-SMD, Gull Wing
- Datasheet:
-
MXLDA3KP18A.pdf
- Description:
- UNI-DIRECTIONAL TVS_16L DIP
- Quantity:
- Payment:
- Shipping:
Inventory:9,708
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Product details
Overview
MXLDA3KP18A 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 voltage (V(BR)), and 29.2 V maximum clamping voltage (VC) at 102.8 A peak pulse current. It provides secondary lightning protection per IEC61000-4-5 (42 Ω, Class 1–4; 12 Ω, Class 1–3; 2 Ω, Class 3), ESD/EFT suppression per IEC61000-4-2/4-4, and inductive switching transient protection in industrial power interfaces.
For engineers reviewing the MXLDA3KP18A datasheet, MXLDA3KP18A pinout, MXLDA3KP18A application, or MXLDA3KP18A equivalent, key selection criteria include its 18 V working voltage rating, 29.2 V clamping performance at 102.8 A, unidirectional polarity, UL94V-0 molded package, and compliance with MIL-PRF-19500 screening options for high-reliability deployments.
Technical Context
The MXLDA3KP18A operates as a silicon avalanche diode-based TVS array optimized for fast transient suppression in DC power rails and signal lines. Its <100 ps response time enables effective ESD and EFT mitigation, while its 10/1000 µs surge rating of 3000 W supports robust secondary lightning immunity across multiple source impedances (2 Ω, 12 Ω, 42 Ω).
Designed for surface-mount vertical mounting, it features tin-lead or matte-tin terminations compliant with MIL-STD-750 Method 2026, moisture sensitivity Level 1 (no dry pack required), and full lot traceability. Polarity is defined by odd-numbered pins acting as cathodes, consistent with its unidirectional construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - Maximum continuous DC or peak AC voltage the device blocks without conduction |
| V(BR) min/max | 20.0–22.1 V @ 1 mA - Ensures reliable avalanche initiation within tight tolerance for predictable clamping onset |
| VC @ IPP | 29.2 V @ 102.8 A - Clamping voltage during 10/1000 µs surge defines worst-case overvoltage seen by protected circuitry |
| PPP | 3000 W @ 10/1000 µs - Peak power handling capacity determines survivability under standardized lightning surges |
| ID @ VWM | 2 µA - Ultra-low leakage ensures minimal standby power loss and no interference with high-impedance sensing nodes |
| TJ range | −55 to +150 °C - Extended thermal operating envelope supports deployment in automotive engine bays and industrial enclosures |
Pinout & Package
MXLDA3KP18A uses a 3-pin vertical surface-mount package (case outline per RF01243, Page 7) with void-free UL94V-0 thermosetting epoxy body and tin-lead/matte-tin terminations. Pin 1 is marked by a dot on the top surface; odd-numbered pins (1 and 3) are cathodes, confirming unidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode | Connected to protected line side; conducts surge current to ground when V > V(BR) |
| Pin 2 | Anode | Common anode node tied to system ground or low-impedance return path |
| Pin 3 | Cathode | Second cathode terminal for dual-line or differential protection configurations |
Key Features
| Feature | Design Value |
|---|---|
| 3000 W peak pulse power | Enables single-device protection against IEC61000-4-5 Class 4 surges (42 Ω source) without cascaded staging |
| 29.2 V clamping at 102.8 A | Keeps downstream 24 V logic or analog circuitry below absolute maximum ratings during worst-case transients |
| UL94V-0 epoxy package | Provides flame-retardant mechanical integrity and long-term reliability in high-vibration industrial environments |
| MIL-PRF-19500 screening option | Supports aerospace and defense programs requiring wafer/lot traceability, 3σ ID screening, and extended reliability testing |
Applications
| Industrial Motor Drives | Telecom Power Feeds |
|---|---|
Use Scenario: Protection of 24 V DC control inputs and encoder feedback lines against inductive kickback and field wiring surges. IC Role / Device Role / Timing Role: Unidirectional TVS array clamping transient overvoltage before it reaches PLC I/O ASICs or microcontroller GPIOs. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V logic interfaces while maintaining <2 µA leakage at nominal bus voltage. | Use Scenario: Surge suppression on −48 V telecom power distribution boards exposed to lightning-induced coupling on long copper runs. IC Role / Device Role / Timing Role: Primary-level TVS device absorbing up to 3000 W of 10/1000 µs energy before upstream fuses open. Use Value: Enables compliance with GR-1089-CORE Zone 3 requirements using a single discrete component instead of multi-stage RC-TVS networks. |
| Railway Signaling Interfaces | Renewable Energy Inverters |
Use Scenario: Protecting 110 V DC trackside sensor interfaces from traction return current transients and EMI coupling. IC Role / Device Role / Timing Role: Fast-response (sub-100 ps) unidirectional clamp placed directly at connector entry point. Use Value: Maintains signal integrity on RS-485 data lines while surviving repeated 2 kV/10/1000 µs surges per EN 50121-4. | Use Scenario: DC-link overvoltage suppression in solar string inverters where PV array fault currents induce high-energy transients. IC Role / Device Role / Timing Role: Secondary protection stage after MOVs, limiting residual clamping voltage to safe levels for IGBT gate drivers. Use Value: Reduces risk of false triggering or destruction of isolated gate drivers during grid fault events with 2 Ω source impedance. |
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, SMC package, 29.2 V VC @ 21.2 A - lower surge capacity and smaller footprint | Targeted at consumer-grade 12–24 V systems with lower surge exposure (IEC61000-4-5 Class 2 only) | Select SMBJ18A only if board space is constrained and peak surge threat is ≤600 W; MXLDA3KP18A remains mandatory for Class 3/4 compliance. |
| SMCJ18A | 1500 W PPP rating, same SMC package outline, 29.2 V VC @ 51.4 A - mid-tier power handling | Suitable for industrial controls with moderate lightning exposure but insufficient for rail or telecom Zone 3 requirements | Use SMCJ18A where cost is prioritized over MIL-PRF-19500 traceability and full 3000 W margin; MXLDA3KP18A delivers verified Class 4 immunity. |
Compared with SMBJ18A and SMCJ18A, MXLDA3KP18A provides double the surge power margin (3000 W vs. 1500/600 W), guaranteed MIL-PRF-19500 screening eligibility, and validated performance across all IEC61000-4-5 source impedances - making it the sole choice for mission-critical infrastructure protection.
Availability
MXLDA3KP18A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power feeds, railway signaling interfaces, and renewable energy inverters requiring stable component supply across extended product lifecycles.
Supply support for MXLDA3KP18A 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 specifically for high-energy transient suppression in safety-critical infrastructure, emphasizing MIL-PRF-19500 compliance, full lot traceability, and validated IEC61000-4-5 Class 4 performance at 42 Ω source impedance.
FAQ
What is the standoff voltage rating of the MXLDA3KP18A?
The MXLDA3KP18A has a rated reverse standoff voltage (VWM) of 18 V, meaning it remains non-conductive up to this DC or peak AC voltage across its operating temperature range. This value is selected to match standard 24 V industrial bus systems while providing sufficient margin above nominal voltage to avoid false triggering during normal operation. The MXLDA3KP18A's VWM is confirmed in the Electrical Characteristics table on page 3 of RF01243 Rev B.
Does the MXLDA3KP18A meet IEC61000-4-5 Class 4 requirements?
Yes, the MXLDA3KP18A is explicitly rated for IEC61000-4-5 Class 4 secondary lightning protection with a 42 Ω source impedance, as stated in the Applications/Benefits section on page 1 of RF01243 Rev B. It also supports Class 1–3 at 12 Ω and Class 2–3 at 2 Ω source impedances. Its 3000 W peak pulse power rating and 29.2 V clamping voltage ensure compliance without derating or external staging. This capability is intrinsic to the MXLDA3KP18A design.
What is the clamping voltage of the MXLDA3KP18A at maximum surge current?
The MXLDA3KP18A exhibits a maximum clamping voltage (VC) of 29.2 V at its rated peak pulse current (IPP) of 102.8 A under 10/1000 µs waveform conditions. This value is measured per Figure 2 test methodology and appears in the Electrical Characteristics table on page 3 of RF01243 Rev B. The low VC ensures protected circuits-such as 24 V-rated controllers or isolated gate drivers-remain within safe operating limits during surge events.
Is the MXLDA3KP18A RoHS compliant?
Yes, the MXLDA3KP18A is RoHS compliant, indicated by the "e3" suffix in its full part marking per the nomenclature guide on page 2 of RF01243 Rev B. The "e3" designation confirms annealed matte-tin plating and lead-free assembly compatibility. This compliance applies to both standard and MIL-PRF-19500 screened versions of the MXLDA3KP18A, with no exemption required.
What package type and pin configuration does the MXLDA3KP18A use?
The MXLDA3KP18A uses a vertical surface-mount 3-pin package with UL94V-0 thermosetting epoxy body and tin-lead or matte-tin terminations. Pin 1 is marked by a dot; odd-numbered pins (1 and 3) serve as cathodes, and Pin 2 is the common anode. This configuration supports unidirectional dual-line protection and is documented in the Mechanical and Packaging section on page 2 and Package Dimensions on page 6 of RF01243 Rev B.
MXLDA3KP18A 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:
- -
MXLDA3KP18A FAQ
1.How can I place an order for MXLDA3KP18A through Aetrix?
Please submit a Request for Quotation (RFQ) for MXLDA3KP18A 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 MXLDA3KP18A reliable?
The price and inventory of MXLDA3KP18A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXLDA3KP18A is usually 5 days.
3.What payment methods are accepted for MXLDA3KP18A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXLDA3KP18A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXLDA3KP18A?
MXLDA3KP18A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXLDA3KP18A 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 MXLDA3KP18A?
For technical support, including MXLDA3KP18A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXLDA3KP18A requirements.
6.How does Aetrix verify that MXLDA3KP18A is sourced from the original manufacturer or authorized distributors?
All MXLDA3KP18A 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 MXLDA3KP18A meets industry standards.
7.What is the process for return or replacement of MXLDA3KP18A?
All MXLDA3KP18A units undergo pre-shipment inspection (PSI). If there is an issue with MXLDA3KP18A, 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 MXLDA3KP18A part is unused and in its original packaging.
Return procedure for MXLDA3KP18A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MXLDA3KP18A Tags
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