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Microchip Technology MXDA3KP18A
- Part No.:
- MXDA3KP18A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 16-SMD, Gull Wing
- Datasheet:
-
MXDA3KP18A.pdf
- Description:
- UNI-DIRECTIONAL TVS_16L DIP
- Quantity:
- Payment:
- Shipping:
Inventory:6,675
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Product details
Overview
MXDA3KP18A 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 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 MXDA3KP18A datasheet, MXDA3KP18A pinout, MXDA3KP18A application, or MXDA3KP18A equivalent, key selection criteria include its 18 V working standoff, 29.2 V clamping at 102.8 A, -55 to +150 °C operating junction temperature, RoHS-compliant void-free epoxy package, and verified compliance with MIL-PRF-19500 high-reliability screening options.
Technical Context
The MXDA3KP18A operates as a unidirectional avalanche diode-based TVS, designed for fast-clamp response (<100 ps rise time) during transient overvoltage events. Its electrical behavior is defined by precise VWM = 18 V, V(BR) = 20.0–22.1 V at I(BR) = 1 mA, and VC = 29.2 V at IPP = 102.8 A under 10/1000 µs waveform.
It meets IEC61000-4-5 secondary lightning immunity across multiple source impedances (42 Ω, 12 Ω, 2 Ω) and supports ESD (IEC61000-4-2) and EFT (IEC61000-4-4) protection without derating up to +125 °C per Figure 3 derating curve. All units undergo surge testing and 3σ lot norm screening on standby current (ID ≤ 2 µA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - maximum continuous reverse operating voltage before clamping begins |
| V(BR) min/max | 20.0–22.1 V @ 1 mA - ensures reliable avalanche conduction onset within tight tolerance |
| VC @ IPP | 29.2 V @ 102.8 A - limits downstream voltage stress during 10/1000 µs transients |
| PPP | 3000 W @ 10/1000 µs - sustains high-energy surges without failure |
| ID @ VWM | ≤2 µA - negligible leakage at rated standoff, preserving signal/power integrity |
| TJ range | -55 to +150 °C - enables deployment in extended-temperature industrial and aerospace environments |
| RoHS | e3 marking - lead-free matte-tin plating compliant with EU Directive 2011/65/EU |
Pinout & Package
MXDA3KP18A uses a 3-pin surface-mount DO-214AB (SMC) package with void-free UL94V-0 epoxy body, tin-lead or matte-tin terminations, and polarity marked by dot indicating Pin 1 (cathode). Odd-numbered pins are cathodes per device configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode | Connected to protected line; conducts during overvoltage to shunt current to ground |
| Pin 2 | Anode | Common anode connection point; ties to system ground reference |
| Pin 3 | Cathode | Second cathode terminal for dual-line or differential protection configuration |
Key Features
| Feature | Design Value |
|---|---|
| 3000 W peak pulse power | Handles high-energy transients (e.g., lightning-induced surges) without thermal runaway |
| Clamping response <100 ps | Prevents damage to downstream ICs before propagation of fast-rising ESD/EFT events |
| MIL-PRF-19500 screening option | Enables use in defense/aerospace programs requiring wafer/lot traceability and reliability validation |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to reflow, reducing assembly cost and risk |
| 100% surge tested | Guarantees functional robustness against worst-case transient waveforms per production lot |
Applications
| Industrial Motor Drives | Telecom Power Feeds |
|---|---|
Use Scenario: Protection of DC bus inputs in variable-frequency drives exposed to inductive kickback and grid transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping line-to-ground surges before they reach gate drivers or MCU power rails. Use Value: Limits transient voltage to ≤29.2 V at 102.8 A, preventing latch-up or destruction of 24 V-rated control circuitry. | Use Scenario: Surge suppression on -48 V telecom power distribution lines subject to lightning coupling and hot-swap events. IC Role / Device Role / Timing Role: Standoff-rated (18 V) clamping element absorbing 3000 W pulses while maintaining low leakage (<2 µA). Use Value: Enables compliance with GR-1089-CORE Zone 3 secondary lightning requirements using 42 Ω source impedance. |
| Medical Imaging Power Supplies | Railway Signaling Interfaces |
Use Scenario: Input protection for high-voltage X-ray generator power supplies where EMI and switching noise induce repetitive transients. IC Role / Device Role / Timing Role: Fast-response TVS placed at AC/DC converter input to clamp 10/1000 µs surges before bulk capacitors. Use Value: Maintains ≤2 µA standby current at 18 V, avoiding unnecessary loading of precision bias networks. | Use Scenario: Interface protection for 24 V signaling lines in track-side electronic interlocking systems subjected to traction return currents and EFT bursts. IC Role / Device Role / Timing Role: Dual-cathode configuration used for line-to-line and line-to-ground protection in redundant signaling pairs. Use Value: Supports IEC61000-4-4 Level 4 EFT immunity (4 kV) and IEC61000-4-5 Class 3 (12 Ω source) without derating below +85 °C. |
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 VWM (18 V), but lower VC (29.2 V vs. 28.7 V) and IPP (32.4 A vs. 102.8 A) | Limited to lower-energy transients; unsuitable for IEC61000-4-5 Class 4 with 42 Ω source | Select MXDA3KP18A when 3000 W surge handling and MIL-PRF-19500 screening are required. |
| 1.5KE18A | Through-hole TO-218 package, identical VWM/VC/IPP specs, but no RoHS e3 marking or moisture Level 1 rating | Requires wave soldering; incompatible with fine-pitch SMT lines and J-STD-020B reflow profiles | Choose MXDA3KP18A for automated SMT assembly, high-reliability screening, and lead-free compliance. |
Compared with SMBJ18A and 1.5KE18A, MXDA3KP18A delivers 5× higher peak pulse power in an RoHS-compliant SMT package with certified high-reliability screening options-making it uniquely suited for mission-critical industrial and aerospace surge protection where energy handling, assembly compatibility, and qualification traceability are jointly essential.
Availability
MXDA3KP18A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power feeds, medical imaging power supplies, and railway signaling interfaces requiring stable component supply, long-term lifecycle support, and consistent surge performance across production batches.
Supply support for MXDA3KP18A 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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, communications, and industrial markets.
The MDA3KP series was engineered specifically for high-energy transient suppression in harsh-environment power interfaces-emphasizing surge robustness, temperature stability, and qualification-grade manufacturing traceability.
FAQ
What is the clamping voltage of MXDA3KP18A at its rated peak pulse current?
The MXDA3KP18A has 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 standard test methods defined in the RF01243 datasheet and guarantees that downstream components see no more than 29.2 V during worst-case surge events. The MXDA3KP18A maintains this clamping performance across its full operating temperature range.
Is MXDA3KP18A RoHS compliant and what does the 'e3' marking indicate?
Yes, MXDA3KP18A is RoHS compliant, indicated by the 'e3' suffix in its marking per Microsemi's nomenclature. The 'e3' denotes annealed matte-tin plating meeting EU Directive 2011/65/EU, with no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits. This ensures compatibility with lead-free reflow processes and environmental compliance for global deployments.
Does MXDA3KP18A support secondary lightning protection per IEC61000-4-5, and at which classes?
Yes, MXDA3KP18A supports secondary lightning protection per IEC61000-4-5 across multiple source impedances: Class 1–4 with 42 Ω source, Class 1–3 with 12 Ω source, and Class 3 with 2 Ω source. These classifications are explicitly confirmed in the Applications/Benefits section of RF01243 Rev B. The MXDA3KP18A's 3000 W rating and 29.2 V clamping enable compliance without external circuit modifications.
What is the standoff voltage (VWM) and why is it critical for selecting MXDA3KP18A?
The MXDA3KP18A has a rated reverse standoff voltage (VWM) of 18 V, meaning it remains non-conductive up to this peak DC or AC voltage. This parameter is critical because VWM must equal or exceed the maximum normal operating voltage of the protected line to avoid false triggering. Selecting MXDA3KP18A for a 15–18 V rail ensures reliable blocking during operation while enabling fast clamping above 20.0 V breakdown threshold.
Can MXDA3KP18A be used in high-reliability applications requiring MIL-PRF-19500 screening?
Yes, optional upscreening per MIL-PRF-19500 is available for MXDA3KP18A, including wafer fabrication and assembly lot traceability, 3σ lot norm screening on standby current (ID), and conformance inspections. This makes MXDA3KP18A suitable for defense, aerospace, and critical infrastructure programs where process control and reliability validation are mandatory-not just recommended.
MXDA3KP18A 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:
- -
MXDA3KP18A FAQ
1.How can I place an order for MXDA3KP18A through Aetrix?
Please submit a Request for Quotation (RFQ) for MXDA3KP18A 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 MXDA3KP18A reliable?
The price and inventory of MXDA3KP18A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXDA3KP18A is usually 5 days.
3.What payment methods are accepted for MXDA3KP18A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXDA3KP18A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXDA3KP18A?
MXDA3KP18A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXDA3KP18A 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 MXDA3KP18A?
For technical support, including MXDA3KP18A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXDA3KP18A requirements.
6.How does Aetrix verify that MXDA3KP18A is sourced from the original manufacturer or authorized distributors?
All MXDA3KP18A 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 MXDA3KP18A meets industry standards.
7.What is the process for return or replacement of MXDA3KP18A?
All MXDA3KP18A units undergo pre-shipment inspection (PSI). If there is an issue with MXDA3KP18A, 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 MXDA3KP18A part is unused and in its original packaging.
Return procedure for MXDA3KP18A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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