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Microchip Technology MDA3KP28A
- Part No.:
- MDA3KP28A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 16-SMD, Gull Wing
- Datasheet:
-
MDA3KP28A.pdf
- Description:
- UNI-DIRECTIONAL TVS_16L DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,644
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Product details
Overview
MDA3KP28A from Microsemi is a unidirectional 3000 W surface-mount transient voltage suppressor (TVS) array designed for high-reliability secondary lightning and ESD protection in industrial power interfaces. It features a 28 V standoff voltage (VWM), 31.1–34.4 V breakdown range (V(BR)), 45.4 V clamping voltage at 66 A peak pulse current, and operates from –55 °C to +150 °C.
For engineers reviewing the MDA3KP28A datasheet, MDA3KP28A pinout, MDA3KP28A application, or MDA3KP28A equivalent, key selection criteria include IEC61000-4-5 Class 1–4 compliance with 42 Ω source impedance, 100 ps response time, RoHS-compliant e3 matte-tin plating, and MIL-PRF-19500 upscreening eligibility.
Technical Context
The MDA3KP28A employs silicon avalanche diode technology optimized for fast clamping under high-energy transients. Its unidirectional polarity defines odd-numbered pins as cathodes, and it delivers 3000 W peak pulse power at 10/1000 μs waveform with <100 ps response from 0 V to V(BR) min.
It meets IEC61000-4-2 (ESD), IEC61000-4-4 (EFT), and IEC61000-4-5 (lightning) standards across multiple source impedances (2 Ω, 12 Ω, 42 Ω), supporting Class 1–4 protection when used with appropriate PCB layout and system grounding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping begins |
| V(BR) min/max | 31.1–34.4 V @ 1 mA - Ensures reliable avalanche initiation within defined tolerance band |
| VC @ IPP | 45.4 V @ 66 A - Clamping voltage during 10/1000 μs surge limits downstream voltage stress |
| IPP | 66 A - Peak surge current capability per IEC61000-4-5 10/1000 μs test condition |
| TJ range | –55 °C to +150 °C - Enables deployment in harsh industrial and aerospace environments |
| Response time | <100 ps - Virtually instantaneous clamping prevents damage to sensitive ICs |
| Package | Surface-mount vertical array - Optimized for high-current PCB trace routing and thermal dissipation |
Pinout & Package
MDA3KP28A uses a multi-pin vertical surface-mount package with odd-numbered terminals designated as cathodes per device polarity convention. The body is void-free thermosetting epoxy (UL94V-0), marked with date code and part number; Pin 1 identified by dot on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode of first TVS element | Primary current sink path during reverse transient; connects to protected line |
| Pin 2 | Anode common | Shared anode node for all TVS elements; ties to system ground plane |
| Pin 3 | Cathode of second TVS element | Second independent protection channel; supports dual-line or differential interface |
| Pin 4 | Anode common | Redundant ground connection for improved current sharing and thermal distribution |
Key Features
| Feature | Design Value |
|---|---|
| 3000 W peak pulse rating | Sustains high-energy surges without degradation-critical for industrial motor drives and power supply inputs |
| RoHS-compliant e3 matte-tin plating | Ensures solderability per MIL-STD-750 Method 2026 and eliminates lead-based assembly concerns |
| MIL-PRF-19500 upscreening option | Enables qualification for aerospace and defense programs requiring lot traceability and 3σ screening |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints-reduces handling overhead in SMT lines |
| Unidirectional construction | Prevents forward conduction during normal operation while enabling precise clamping on negative transients |
Applications
| Industrial Motor Drives | Telecom Power Feeds |
|---|---|
Use Scenario: Protection of DC bus inputs against switching transients from IGBT commutation and inductive load kickback. IC Role / Device Role / Timing Role: Transient voltage suppressor array clamping surge energy before it reaches gate drivers or MCU power rails. Use Value: Limits voltage excursion to ≤45.4 V during 66 A surges, preventing latch-up or overvoltage failure in 24–48 V systems. | Use Scenario: Surge suppression on -48 V telecom power distribution boards exposed to lightning-induced coupling. IC Role / Device Role / Timing Role: Unidirectional TVS array absorbing 10/1000 μs surges per IEC61000-4-5 Class 4 (42 Ω source). Use Value: Maintains system uptime by surviving repeated 3 kV/6 kA surges without parametric shift or leakage increase. |
| Medical Imaging Power Supplies | Railway Signaling Interfaces |
Use Scenario: Safeguarding high-voltage X-ray generator control circuits from EFT bursts during equipment startup/shutdown. IC Role / Device Role / Timing Role: Fast-response TVS element suppressing nanosecond-scale EFT events per IEC61000-4-4. Use Value: Prevents false triggering or reset in safety-critical subsystems via sub-100 ps clamping latency. | Use Scenario: Protecting 24 V DC signaling lines in trackside cabinets subjected to induced surges from nearby traction currents. IC Role / Device Role / Timing Role: Dual-channel unidirectional TVS array guarding both signal and return paths against asymmetric transients. Use Value: Delivers coordinated clamping across two lines with matched V(BR) tolerance (±5%), minimizing differential mode stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ28A | 600 W rating, DO-214AC package, 45.7 V VC @ 33.4 A IPP | Lower power handling; suitable only for Class 1–2 IEC61000-4-5 | Select when space-constrained layouts preclude vertical array mounting and surge energy is ≤600 W |
| Vishay VMM28A | 1500 W rating, SMC package, 45.7 V VC @ 46.5 A IPP, bidirectional option available | Half the peak power; lacks MIL-PRF-19500 upscreening path | Choose for cost-sensitive industrial controls where full 3 kW immunity is not required |
Compared with MDA3KP28A, SMAJ28A offers smaller footprint but sacrifices 50% peak power capacity and high-reliability screening, while VMM28A provides mid-tier performance with broader polarity options yet no military-grade traceability or derating margin for extended thermal cycles.
Availability
MDA3KP28A 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 across long production lifecycles.
Supply support for MDA3KP28A 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 developed specifically for mission-critical transient suppression in systems subject to lightning, ESD, and switching surges-emphasizing robustness, repeatability, and compliance with MIL-PRF-19500 screening standards.
FAQ
What is the maximum clamping voltage of the MDA3KP28A under standard test conditions?
The MDA3KP28A has a maximum clamping voltage (VC) of 45.4 V when subjected to its rated peak pulse current (IPP) of 66 A using the 10/1000 μs waveform. This value is measured per Figure 2 in the RF01243 datasheet and ensures downstream components see limited overvoltage during surge events. The MDA3KP28A maintains this clamping performance across its full operating temperature range.
Is the MDA3KP28A suitable for IEC61000-4-5 Class 4 lightning protection?
Yes, the MDA3KP28A supports IEC61000-4-5 Class 4 testing with a 42 Ω source impedance, as confirmed in the Applications/Benefits section of the RF01243 datasheet. It also covers Class 1–3 with 12 Ω and Class 2–4 with 2 Ω source impedances. The MDA3KP28A achieves this through its 3000 W peak pulse power rating and low clamping voltage, making it appropriate for high-immunity system-level surge protection.
Does the MDA3KP28A require dry packing or special moisture handling?
No, the MDA3KP28A has IPC/JEDEC J-STD-020B moisture sensitivity level 1, meaning it does not require dry pack storage or floor-life tracking. This simplifies SMT assembly logistics and eliminates bake-out steps prior to reflow. The MDA3KP28A's packaging and plating ensure long-term stability without humidity-related degradation risks.
Can the MDA3KP28A be used in bidirectional configurations?
No-the MDA3KP28A is unidirectional only. Bidirectional variants carry a "C" suffix (e.g., MDA3KP28CA). The MDA3KP28A's polarity is fixed: odd-numbered pins are cathodes, and even-numbered pins are the common anode. Using it in reverse-biased AC applications would result in forward conduction and potential failure. Always verify polarity alignment in schematic capture for the MDA3KP28A.
What is the standoff voltage rating of the MDA3KP28A, and how does it relate to system design?
The MDA3KP28A has a rated reverse standoff voltage (VWM) of 28 V, meaning it remains non-conductive up to this DC or peak AC voltage under normal operation. System designers must ensure the maximum continuous operating voltage stays at or below 28 V to prevent leakage or premature clamping. The MDA3KP28A's VWM aligns with common 24 V industrial and telecom rails, providing margin before breakdown at 31.1 V minimum.
MDA3KP28A 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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 66A
- 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:
- -
MDA3KP28A FAQ
1.How can I place an order for MDA3KP28A through Aetrix?
Please submit a Request for Quotation (RFQ) for MDA3KP28A 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 MDA3KP28A reliable?
The price and inventory of MDA3KP28A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MDA3KP28A is usually 5 days.
3.What payment methods are accepted for MDA3KP28A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MDA3KP28A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MDA3KP28A?
MDA3KP28A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MDA3KP28A 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 MDA3KP28A?
For technical support, including MDA3KP28A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MDA3KP28A requirements.
6.How does Aetrix verify that MDA3KP28A is sourced from the original manufacturer or authorized distributors?
All MDA3KP28A 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 MDA3KP28A meets industry standards.
7.What is the process for return or replacement of MDA3KP28A?
All MDA3KP28A units undergo pre-shipment inspection (PSI). If there is an issue with MDA3KP28A, 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 MDA3KP28A part is unused and in its original packaging.
Return procedure for MDA3KP28A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MDA3KP28A Tags
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