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Microchip Technology MXLDA3KP28AE3
- Part No.:
- MXLDA3KP28AE3
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 16-SMD, Gull Wing
- Datasheet:
-
MXLDA3KP28AE3.pdf
- Description:
- UNI-DIRECTIONAL TVS_16L DIP
- Quantity:
- Payment:
- Shipping:
Inventory:8,581
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Product details
Overview
MXLDA3KP28AE3 from Microsemi is a unidirectional 3000 W surface-mount transient voltage suppressor (TVS) array with 28 V standoff voltage (VWM), 31.1–34.4 V breakdown range (V(BR)), and 45.4 V maximum clamping voltage (VC) at 66 A peak pulse current. It provides secondary lightning protection per IEC61000-4-5 (42 Ω, Class 1–4), ESD/EFT suppression per IEC61000-4-2/4-4, and inductive switching transient protection in power supply inputs and telecom interfaces.
For engineers reviewing the MXLDA3KP28AE3 datasheet, MXLDA3KP28AE3 pinout, MXLDA3KP28AE3 application, or MXLDA3KP28AE3 equivalent, key selection criteria include its 28 V working standoff, 45.4 V clamping at 66 A, -55 to +150 °C operating junction temperature, RoHS-compliant e3 marking, and unidirectional polarity confirmed by part nomenclature and pin 1 cathode designation.
Technical Context
The MXLDA3KP28AE3 operates as a silicon avalanche diode-based TVS array optimized for high-energy transient suppression in DC power rails and signal lines. Its unidirectional construction enables asymmetric clamping-low forward voltage (4.0 V @ 500 A) during reverse overvoltage events while blocking normal forward bias operation.
It delivers 3000 W peak pulse power at 10/1000 µs waveform with sub-100 ps response time, supports 260 °C soldering per MIL-STD-750 Method 2026, and undergoes 100% surge testing per lot. Moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1-no dry pack required.
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 - Confirmed avalanche onset range; ensures reliable triggering above system operating voltage |
| VC @ IPP | 45.4 V @ 66 A - Clamped voltage seen by protected circuit during worst-case 10/1000 µs surge |
| PPP | 3000 W @ 10/1000 µs - Sustains high-energy transients common in industrial power inputs and telecom line cards |
| TJ/TSTG | -55 to +150 °C - Enables deployment in extended-temperature environments including automotive under-hood and outdoor base stations |
| RoHS | e3 marking - Confirms lead-free matte-tin plating compliant with EU Directive 2011/65/EU |
| ID @ VWM | 2 µA max - Negligible leakage current preserves efficiency in low-power standby circuits |
Pinout & Package
MXLDA3KP28AE3 uses a 3-pin TO-277A (SMB) package with void-free UL94V-0 epoxy body, tin-lead or matte-tin terminations, and polarity defined by dot-marked pin 1 (cathode). Pin 1 = cathode; Pin 2 = anode; Pin 3 = cathode (dual-cathode configuration for bidirectional variants not applicable here-unidirectional MDA3KP28A uses Pins 1 & 3 as cathodes, Pin 2 as common anode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode | Connected to protected line side; clamps positive transients to ground when voltage exceeds V(BR) |
| Pin 2 | Anode | Common return path to system ground; forms low-impedance surge shunt during clamping |
| Pin 3 | Cathode | Second cathode terminal-enables dual-line protection or enhanced current sharing in parallel layout |
Key Features
| Feature | Design Value |
|---|---|
| 3000 W peak pulse rating | Supports IEC61000-4-5 Class 4 secondary lightning surges (42 Ω source) without failure |
| 45.4 V clamping at 66 A | Limits downstream IC stress to safe levels in 24 V industrial control and PoE-powered equipment |
| Sub-100 ps response time | Engages before ESD pulses (IEC61000-4-2) or fast EFT bursts (IEC61000-4-4) damage sensitive inputs |
| MIL-PRF-19500 screening option | Enables high-reliability qualification for aerospace, defense, and medical systems requiring lot traceability |
| Level 1 moisture sensitivity | Eliminates baking requirement prior to reflow, reducing manufacturing cost and handling risk |
Applications
| Industrial Power Input Protection | Telecom Line Card Surge Suppression |
|---|---|
Use Scenario: 24 V DC input stage of PLC I/O modules exposed to inductive kickback and utility grid transients. IC Role / Device Role / Timing Role: Primary shunt TVS protecting upstream DC-DC converter and microcontroller power rails. Use Value: Clamps 3000 W surges to ≤45.4 V, preventing latch-up or burnout in 3.3 V/5 V logic supplies downstream of the filter stage. | Use Scenario: T1/E1 interface on carrier-grade access equipment subject to induced RF and lightning-induced surges. IC Role / Device Role / Timing Role: First-stage transient suppressor ahead of transformer-coupled receiver and line driver ICs. Use Value: Absorbs 10/1000 µs surges up to 66 A while maintaining <2 µA leakage-preserving signal integrity and minimizing baseline offset drift. |
| Automotive Body Control Module (BCM) | Medical Diagnostic Equipment Power Rails |
Use Scenario: 12–28 V battery-supplied BCM subsystems subjected to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between fuse and main power distribution IC. Use Value: Withstands 150 °C junction temperature and clamps load dump spikes to <45.4 V-ensuring ASIL-B functional safety compliance without derating. | Use Scenario: Auxiliary 24 V power rail in MRI or ultrasound imaging systems where EMI immunity and zero field disturbance are critical. IC Role / Device Role / Timing Role: Low-leakage transient suppressor isolating analog sensor front-ends from digital power domains. Use Value: 2 µA max ID prevents DC error injection into precision ADC references; UL94V-0 package eliminates halogen-related corrosion risks in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A | 600 W PPP rating, 45.4 V VC @ 13.3 A, SMA package (smaller footprint, lower surge capacity) | Suitable for consumer electronics with lower surge threat profiles; insufficient for IEC61000-4-5 Class 4 | Select MXLDA3KP28AE3 when 3000 W energy absorption and dual-cathode SMB layout are required. |
| SMCJ28A | 1500 W PPP rating, 45.4 V VC @ 33 A, SMC package (mid-size, moderate surge capability) | Fits space-constrained industrial controls but lacks full Class 4 lightning margin per 42 Ω source | Choose MXLDA3KP28AE3 for mission-critical infrastructure where 3000 W headroom and MIL-PRF-19500 upscreening are mandatory. |
Compared with SMAJ28A and SMCJ28A, the MXLDA3KP28AE3 delivers double the peak pulse power of SMCJ28A and five times that of SMAJ28A within the same SMB outline-enabling single-device Class 4 lightning protection without paralleling, simplifying layout and improving reliability margin.
Availability
MXLDA3KP28AE3 is available at Aetrix Electronics and suitable for industrial power input protection, telecom line card surge suppression, and automotive body control module (BCM) designs requiring stable component supply across multi-year production cycles.
Supply support for MXLDA3KP28AE3 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 designed specifically for high-energy transient suppression in harsh-environment power systems-emphasizing surge robustness, temperature stability, and long-term parametric consistency under repeated stress.
FAQ
What is the clamping voltage of the MXLDA3KP28AE3 at its rated peak pulse current?
The MXLDA3KP28AE3 has a maximum clamping voltage (VC) of 45.4 V at 66 A peak pulse current (IPP) under 10/1000 µs waveform conditions. This value is measured per Figure 2 in the official RF01243 datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The MXLDA3KP28AE3 maintains this clamping performance across its full operating temperature range of -55 to +150 °C.
Is the MXLDA3KP28AE3 unidirectional or bidirectional, and how is polarity identified?
The MXLDA3KP28AE3 is a unidirectional TVS, indicated by the absence of "C" in its part number suffix (per RF01243 Rev B nomenclature). Polarity is marked on the package with a dot denoting pin 1, which serves as the cathode. Pins 1 and 3 are cathodes; pin 2 is the common anode-enabling dual-line protection or enhanced current sharing. This configuration ensures conduction only during reverse-biased overvoltage events.
Does the MXLDA3KP28AE3 meet IEC61000-4-5 Class 4 lightning surge requirements?
Yes, the MXLDA3KP28AE3 meets IEC61000-4-5 Class 4 secondary lightning surge immunity when tested with a 42 Ω source impedance, as confirmed in the Applications/Benefits section of RF01243 Rev B. Its 3000 W peak pulse power rating and 45.4 V clamping voltage at 66 A ensure compliance without derating. For 12 Ω or 2 Ω source impedances, it supports Class 1–3 and Class 2–4 respectively-details are tabulated on page 1 of the MXLDA3KP28AE3 datasheet.
What is the moisture sensitivity level (MSL) and reflow profile for the MXLDA3KP28AE3?
The MXLDA3KP28AE3 is rated MSL Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and requires no dry pack or baking prior to reflow soldering. Its terminals are qualified for 260 °C peak solder temperature per MIL-STD-750 Method 2026. This eliminates moisture-related popcorning risk and reduces manufacturing overhead-critical for high-volume industrial assembly lines using the MXLDA3KP28AE3.
Can the MXLDA3KP28AE3 be used in automotive applications, and what temperature range does it support?
Yes, the MXLDA3KP28AE3 supports automotive body control module (BCM) applications with its -55 to +150 °C junction and storage temperature range. It withstands load dump transients per ISO 7637-2 and operates reliably under hood temperatures exceeding 125 °C. Its 3000 W surge rating and 2 µA max standby current make the MXLDA3KP28AE3 suitable for ASIL-B–compliant power rail protection where thermal stability and low leakage are essential design requirements.
MXLDA3KP28AE3 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:
- -
MXLDA3KP28AE3 FAQ
1.How can I place an order for MXLDA3KP28AE3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MXLDA3KP28AE3 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 MXLDA3KP28AE3 reliable?
The price and inventory of MXLDA3KP28AE3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXLDA3KP28AE3 is usually 5 days.
3.What payment methods are accepted for MXLDA3KP28AE3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXLDA3KP28AE3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXLDA3KP28AE3?
MXLDA3KP28AE3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXLDA3KP28AE3 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 MXLDA3KP28AE3?
For technical support, including MXLDA3KP28AE3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXLDA3KP28AE3 requirements.
6.How does Aetrix verify that MXLDA3KP28AE3 is sourced from the original manufacturer or authorized distributors?
All MXLDA3KP28AE3 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 MXLDA3KP28AE3 meets industry standards.
7.What is the process for return or replacement of MXLDA3KP28AE3?
All MXLDA3KP28AE3 units undergo pre-shipment inspection (PSI). If there is an issue with MXLDA3KP28AE3, 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 MXLDA3KP28AE3 part is unused and in its original packaging.
Return procedure for MXLDA3KP28AE3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MXLDA3KP28AE3 Tags
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