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Microchip Technology MXLDA3KP28A
- Part No.:
- MXLDA3KP28A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 16-SMD, Gull Wing
- Datasheet:
-
MXLDA3KP28A.pdf
- Description:
- UNI-DIRECTIONAL TVS_16L DIP
- Quantity:
- Payment:
- Shipping:
Inventory:9,883
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Product details
Overview
MXLDA3KP28A 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 reverse standoff voltage (VWM), 31.1–34.4 V breakdown voltage (V(BR)), 45.4 V maximum clamping voltage at 66 A peak pulse current, and operates from –55 °C to +150 °C.
For engineers reviewing the MXLDA3KP28A datasheet, MXLDA3KP28A pinout, MXLDA3KP28A application, or MXLDA3KP28A equivalent, key selection criteria include clamping performance under 10/1000 µs surge, standoff voltage margin versus system DC bus, thermal derating above 25 °C, and compliance with IEC61000-4-2/4-4/4-5 Class 1–4 test levels.
Technical Context
The MXLDA3KP28A is a single-channel, unidirectional TVS diode optimized for fast-clamping suppression of high-energy transients. Its <100 ps response time enables effective ESD protection per IEC61000-4-2, while its 3000 W peak pulse power rating at 10/1000 µs supports robust secondary lightning immunity per IEC61000-4-5 with 42 Ω, 12 Ω, and 2 Ω source impedances.
It uses a void-free thermosetting epoxy package rated UL94V-0, with tin-lead or matte-tin terminations solderable per MIL-STD-750 Method 2026. Polarity is defined by dot marking; odd-numbered pins are cathodes, confirming its unidirectional configuration and enabling direct integration into DC-biased signal/power lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous DC or peak AC voltage the device blocks without conduction |
| V(BR) min/max | 31.1–34.4 V @ 1 mA - Ensures reliable turn-on above operating voltage with margin against false triggering |
| VC @ IPP | 45.4 V @ 66 A - Clamped voltage during 10/1000 µs surge; defines maximum stress on downstream ICs |
| PPP | 3000 W @ 10/1000 µs - Sustains high-energy surges typical of industrial motor drives and telecom line cards |
| ID @ VWM | ≤2 µA - Negligible leakage at full standoff voltage, critical for low-power sensor interfaces |
| TJ/TSTG | –55 °C to +150 °C - Supports operation in harsh environments including automotive engine bays and outdoor base stations |
Pinout & Package
MXLDA3KP28A is housed in a surface-mount, void-free thermosetting epoxy package (UL94V-0) with dual leads. Pin 1 is marked by a dot on the top surface and serves as the cathode; Pin 2 is the anode. The package measures 21.03–22.05 mm × 6.86–7.87 mm × 8.64–9.65 mm (L×W×H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode | Connected to protected line side; clamps when voltage exceeds V(BR) relative to Pin 2 |
| Pin 2 | Anode | Typically tied to system ground or lower-potential rail; completes conduction path during surge |
Key Features
| Feature | Design Value |
|---|---|
| 3000 W peak pulse power | Withstands high-energy 10/1000 µs transients common in industrial motor controls and PoE injectors |
| 45.4 V clamping at 66 A | Limits voltage overshoot to safe levels for 24 V nominal systems with ±10% tolerance |
| –55 °C to +150 °C operating range | Enables deployment in extended-temperature applications such as railway signaling and solar inverters |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints, simplifying SMT assembly logistics |
| MIL-PRF-19500 upscreening option | Supports high-reliability programs requiring lot traceability, burn-in, and parametric screening |
Applications
| Industrial Motor Drives | Telecom Line Cards |
|---|---|
Use Scenario: Protection of gate drivers and feedback sensors against switching-induced transients in 24–48 V DC bus systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed across DC link or I/O lines to clamp voltage spikes before they reach control ICs. Use Value: Limits clamped voltage to 45.4 V, ensuring compatibility with 36 V-rated op-amps and isolated gate drivers. | Use Scenario: Surge protection on Ethernet PHY interfaces and auxiliary power rails in carrier-grade line cards. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V bias rails and MDI pairs subjected to IEC61000-4-5 Class 3 (12 Ω source) surges. Use Value: Delivers 3000 W surge handling with <100 ps response, meeting GR-1089-CORE lightning immunity requirements. |
| Solar Inverters | Railway Signaling Systems |
Use Scenario: DC string input protection in string inverters exposed to lightning-induced surges on rooftop PV arrays. IC Role / Device Role / Timing Role: Secondary-level TVS on MPPT input stage, coordinated with upstream MOVs to handle residual energy after coarse clamping. Use Value: Maintains ≤2 µA leakage at 28 V, preserving efficiency in high-impedance voltage-sense circuits. | Use Scenario: Overvoltage protection on 36 V nominal control circuits in wayside signaling cabinets subject to traction return currents. IC Role / Device Role / Timing Role: Unidirectional clamp on relay coil drivers and sensor supply lines operating in –40 °C to +85 °C ambient. Use Value: Rated for –55 °C to +150 °C junction temperature, supporting full spec compliance across extreme rail-side thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A | 600 W PPP rating, 43.5 V VC @ 17.1 A; smaller SMB package (3.5 mm × 4.5 mm) | Lower energy handling limits use to sub-1 kV surge environments; unsuitable for IEC61000-4-5 Class 4 | Select SMBJ28A only for space-constrained, low-energy applications where PCB area is prioritized over surge robustness. |
| SMCJ28A | 1500 W PPP rating, 43.5 V VC @ 34.3 A; same SMC package footprint but half the energy capacity | Meets IEC61000-4-5 Class 2–3 but fails Class 4 testing at 42 Ω source impedance | Choose SMCJ28A when cost and thermal mass are balanced against 3000 W requirement-verify derating curves for sustained surge duty. |
Compared with SMBJ28A and SMCJ28A, the MXLDA3KP28A delivers double the peak pulse power of SMCJ28A and five times that of SMBJ28A within the same SMC-compatible leaded form factor, enabling drop-in replacement in legacy layouts while upgrading surge immunity to IEC61000-4-5 Class 4.
Availability
MXLDA3KP28A is available at Aetrix Electronics and suitable for industrial motor drives, telecom line cards, solar inverters, and railway signaling systems requiring stable component supply and long-term lifecycle support.
Supply support for MXLDA3KP28A 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 developed to deliver military-grade transient suppression in commercial surface-mount packages, targeting applications where MIL-PRF-19500 screening, wide temperature operation, and 3000 W surge capability are mandatory.
FAQ
What is the clamping voltage of MXLDA3KP28A at its rated peak pulse current?
The MXLDA3KP28A has a maximum clamping voltage (VC) of 45.4 V at its rated peak pulse current (IPP) of 66 A under 10/1000 µs waveform conditions. This value is measured per standard TVS test methodology and defines the upper voltage limit imposed on protected circuitry during a full-rated surge event. The MXLDA3KP28A maintains this clamping performance across its full operating temperature range.
Is MXLDA3KP28A RoHS compliant?
Yes, MXLDA3KP28A is RoHS compliant, indicated by the "e3" suffix in its full part marking per Microsemi's nomenclature guide. The device uses annealed matte-tin plating on terminations and a UL94V-0 epoxy body, satisfying EU Directive 2011/65/EU requirements. No lead or other restricted substances exceed allowable thresholds in the MXLDA3KP28A construction.
Can MXLDA3KP28A be used for bidirectional protection?
No, MXLDA3KP28A is unidirectional only, as confirmed by its "A" suffix and absence of "C" in the part number. Bidirectional variants (e.g., MXLDA3KP28CA) exist in the same family but feature symmetrical breakdown behavior. Using MXLDA3KP28A in AC-coupled or bipolar signal paths would result in forward conduction during negative half-cycles, potentially damaging the device or circuit.
What is the standoff voltage rating of MXLDA3KP28A, and how does it relate to system design?
The MXLDA3KP28A has a rated reverse standoff voltage (VWM) of 28 V, meaning it remains non-conductive up to this DC or peak AC voltage. System designers must ensure the maximum continuous operating voltage-including ripple, tolerance, and transients-stays below 28 V to prevent leakage or premature conduction. This makes MXLDA3KP28A ideal for 24 V nominal systems with ≤±10% regulation.
Does MXLDA3KP28A require special handling or baking prior to reflow soldering?
No, MXLDA3KP28A does not require baking or dry packing before reflow, as it carries IPC/JEDEC J-STD-020B moisture sensitivity level (MSL) 1. Its thermosetting epoxy body exhibits negligible moisture absorption, allowing indefinite floor life at standard humidity. Standard SnPb or lead-free reflow profiles up to 260 °C peak solder temperature are fully supported for MXLDA3KP28A.
MXLDA3KP28A 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:
- -
MXLDA3KP28A FAQ
1.How can I place an order for MXLDA3KP28A through Aetrix?
Please submit a Request for Quotation (RFQ) for MXLDA3KP28A 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 MXLDA3KP28A reliable?
The price and inventory of MXLDA3KP28A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXLDA3KP28A is usually 5 days.
3.What payment methods are accepted for MXLDA3KP28A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXLDA3KP28A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXLDA3KP28A?
MXLDA3KP28A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXLDA3KP28A 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 MXLDA3KP28A?
For technical support, including MXLDA3KP28A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXLDA3KP28A requirements.
6.How does Aetrix verify that MXLDA3KP28A is sourced from the original manufacturer or authorized distributors?
All MXLDA3KP28A 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 MXLDA3KP28A meets industry standards.
7.What is the process for return or replacement of MXLDA3KP28A?
All MXLDA3KP28A units undergo pre-shipment inspection (PSI). If there is an issue with MXLDA3KP28A, 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 MXLDA3KP28A part is unused and in its original packaging.
Return procedure for MXLDA3KP28A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MXLDA3KP28A Tags
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