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Microchip Technology MXLDA3KP8.5A
- Part No.:
- MXLDA3KP8.5A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 16-SMD, Gull Wing
- Datasheet:
-
MXLDA3KP8.5A.pdf
- Description:
- UNI-DIRECTIONAL TVS_16L DIP
- Quantity:
- Payment:
- Shipping:
Inventory:7,186
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Product details
Overview
MXLDA3KP8.5A from Microsemi is a unidirectional 3000 W surface-mount transient voltage suppressor (TVS) array designed for high-reliability overvoltage protection in power rails and signal lines. It features 8.5 V standoff voltage (VWM), 9.44–10.4 V breakdown range (V(BR)), 14.4 V clamping voltage at 208.4 A peak pulse current, and operates from –55 °C to +150 °C - deployed in industrial motor drives, telecom power supplies, and automotive ECUs.
For engineers reviewing the MXLDA3KP8.5A datasheet, MXLDA3KP8.5A pinout, MXLDA3KP8.5A application, or MXLDA3KP8.5A equivalent, key selection criteria include standoff voltage matching, clamping performance under 10/1000 µs surge, thermal derating above 25 °C, and compliance with IEC61000-4-2/4-4/4-5 for ESD, EFT, and secondary lightning protection.
Technical Context
The MXLDA3KP8.5A uses silicon avalanche diode technology to provide sub-nanosecond response to transients, with <100 ps turn-on delay. Its unidirectional polarity and cathode-defined pinout enable precise placement in DC-biased protection paths.
It is rated for 3000 W peak pulse power at 10/1000 µs waveform, with clamping validated at 208.4 A IPP and 14.4 V VC - ensuring predictable voltage limiting during surge events without latch-up or thermal runaway.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - maximum continuous DC or peak AC voltage the device blocks without conduction |
| V(BR) min/max | 9.44–10.4 V @ 1 mA - defines reliable avalanche initiation threshold for consistent triggering |
| VC @ IPP | 14.4 V @ 208.4 A - clamped voltage seen by protected circuit during full-rated 10/1000 µs surge |
| ID @ VWM | 25 µA - leakage current at operating voltage, low enough to avoid system power loss or false trips |
| PPP | 3000 W @ 10/1000 µs - peak transient energy absorption capacity per single event |
| TJ/TSTG | –55 °C to +150 °C - extended temperature range supports under-hood automotive and industrial environments |
| Package | DO-214AB (SMC) - industry-standard surface-mount outline with 5 g mass and UL94V-0 epoxy body |
Pinout & Package
MXLDA3KP8.5A is housed in a DO-214AB (SMC) package with two terminals: anode and cathode. Polarity is marked by a dot on the package top indicating Pin 1 (cathode). The thermally robust epoxy body meets UL94V-0 and supports reflow soldering up to 260 °C for 10 s.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Cathode) | Surge current sink | Connected to protected line; conducts transient current to ground when V(BR) exceeded |
| Pin 2 (Anode) | Reference / return path | Typically tied to system ground or low-impedance return; completes clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| 3000 W peak pulse rating | Enables single-device protection against severe IEC61000-4-5 Class 4 surges (42 Ω source) without cascading devices |
| 14.4 V clamping at 208.4 A | Limits downstream IC stress to safe levels during 10/1000 µs transients in 12 V rail applications |
| –55 °C to +150 °C operation | Supports deployment in engine control units, industrial PLCs, and outdoor telecom equipment |
| RoHS-compliant e3 marking | Meets global environmental compliance requirements without lead-free assembly compromises |
| MIL-PRF-19500 screening option | Enables high-reliability qualification for aerospace and defense programs requiring lot traceability and 3σ ID screening |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
Use Scenario: Protection of gate drivers and feedback sensing circuits from switching-induced transients in 3-phase inverters. IC Role / Device Role / Timing Role: TVS clamp placed across DC bus or gate resistor to shunt inductive kickback before it reaches sensitive logic. Use Value: Prevents MOSFET gate oxide failure and ADC input saturation by limiting transient voltage to ≤14.4 V at 208 A. | Use Scenario: Input-stage surge suppression on 48 V telecom rectifier outputs exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC output prior to point-of-load regulators. Use Value: Maintains regulated output integrity during IEC61000-4-5 4 kV/2 Ω surge tests without regulator shutdown or latch-up. |
| Automotive Engine Control Units | Industrial PLC I/O Modules |
Use Scenario: Protection of CAN transceiver power pins and sensor supply lines in under-hood ECU designs. IC Role / Device Role / Timing Role: Unidirectional TVS on 5 V or 12 V sensor rails to absorb load dump and ISO 7637-2 pulses. Use Value: Survives repeated 12 V load dump events (ISO 7637-2 Pulse 5a) with no parameter shift due to –55 °C to +150 °C rating. | Use Scenario: Digital input protection in modular PLC backplanes subjected to field-wiring ESD and inductive coupling. IC Role / Device Role / Timing Role: Discrete TVS on each 24 V digital input channel to prevent controller reset from 8 kV contact ESD (IEC61000-4-2). Use Value: Clamps ESD events to <14.4 V within <100 ps, avoiding microcontroller brown-out or GPIO latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5A | 600 W PPP rating, same VWM and VC but lower IPP (92.6 A); DO-214AA package | Not suitable for IEC61000-4-5 Class 4; limited to Class 2/3 or lower-energy ESD/EFT | Select SMBJ8.5A only where surge energy is constrained and board space requires smaller footprint. |
| 1.5KE8.5A | 3000 W PPP but axial-leaded DO-201 package; higher thermal resistance and manual assembly requirement | Not compatible with automated SMT lines; unsuitable for high-density PCBs or vibration-prone environments | Choose 1.5KE8.5A only for prototyping or legacy through-hole designs where rework tolerance is prioritized over production efficiency. |
Compared with SMBJ8.5A and 1.5KE8.5A, the MXLDA3KP8.5A delivers identical 8.5 V standoff and superior 3000 W SMT-compatible surge handling - making it the only choice for high-volume, high-reliability industrial and automotive applications demanding both performance and manufacturability.
Availability
MXLDA3KP8.5A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive engine control units requiring stable component supply across long production lifecycles.
Supply support for MXLDA3KP8.5A 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 and mixed-signal ICs, RF solutions, and discrete protection devices.
The MDA3KP series was developed specifically for mission-critical overvoltage protection in harsh-environment systems - emphasizing surge robustness, wide temperature operation, and MIL-PRF-19500 qualification readiness.
FAQ
What is the clamping voltage of the MXLDA3KP8.5A under full-rated surge conditions?
The MXLDA3KP8.5A exhibits a maximum clamping voltage (VC) of 14.4 V when subjected to its rated peak pulse current of 208.4 A under the standard 10/1000 µs waveform. This value is measured at the device terminals and represents the upper limit of voltage imposed on the protected circuit during worst-case transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the MXLDA3KP8.5A RoHS compliant and what does the 'e3' marking indicate?
Yes, the MXLDA3KP8.5A is RoHS compliant, as confirmed by its 'e3' marking per the Microsemi nomenclature guide. The 'e3' suffix denotes matte-tin plating meeting JEDEC J-STD-020B Level 1 moisture sensitivity - eliminating dry-pack requirements and supporting standard Pb-free reflow profiles up to 260 °C for 10 seconds.
Can the MXLDA3KP8.5A be used for bidirectional transient protection?
No - the MXLDA3KP8.5A is a unidirectional TVS, as indicated by the absence of a 'C' suffix in its part number. Bidirectional variants (e.g., MXLDA3KP8.5CA) are available separately and feature symmetrical clamping for AC-coupled or floating signal lines. Using MXLDA3KP8.5A in bidirectional configurations risks reverse-bias breakdown and permanent damage.
What is the maximum standoff voltage (VWM) and how should it be selected relative to system operating voltage?
The MXLDA3KP8.5A has a rated working standoff voltage (VWM) of 8.5 V - meaning it remains non-conductive up to this DC or peak AC voltage across its terminals. For reliable operation, VWM must equal or exceed the maximum continuous operating voltage of the protected line, with margin for ripple and tolerance; for a nominal 5 V rail, MXLDA3KP8.5A is oversized, while it fits 12 V systems with appropriate derating.
Does the MXLDA3KP8.5A require derating at elevated ambient temperatures?
Yes - the MXLDA3KP8.5A follows a defined thermal derating curve (per Figure 3 in RF01243 Rev B), reducing its 3000 W peak pulse power capability linearly above 25 °C ambient. At +100 °C case temperature, its PPP drops to approximately 60% of rated value (~1800 W), necessitating layout-level thermal management or reduced surge duty cycle in high-temperature deployments.
MXLDA3KP8.5A 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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 208.4A
- 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:
- -
MXLDA3KP8.5A FAQ
1.How can I place an order for MXLDA3KP8.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for MXLDA3KP8.5A 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 MXLDA3KP8.5A reliable?
The price and inventory of MXLDA3KP8.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MXLDA3KP8.5A is usually 5 days.
3.What payment methods are accepted for MXLDA3KP8.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MXLDA3KP8.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MXLDA3KP8.5A?
MXLDA3KP8.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MXLDA3KP8.5A 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 MXLDA3KP8.5A?
For technical support, including MXLDA3KP8.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MXLDA3KP8.5A requirements.
6.How does Aetrix verify that MXLDA3KP8.5A is sourced from the original manufacturer or authorized distributors?
All MXLDA3KP8.5A 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 MXLDA3KP8.5A meets industry standards.
7.What is the process for return or replacement of MXLDA3KP8.5A?
All MXLDA3KP8.5A units undergo pre-shipment inspection (PSI). If there is an issue with MXLDA3KP8.5A, 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 MXLDA3KP8.5A part is unused and in its original packaging.
Return procedure for MXLDA3KP8.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MXLDA3KP8.5A Tags
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