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Microchip Technology MDA3KP8.5A
- Part No.:
- MDA3KP8.5A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 16-SMD, Gull Wing
- Datasheet:
-
MDA3KP8.5A.pdf
- Description:
- UNI-DIRECTIONAL TVS_16L DIP
- Quantity:
- Payment:
- Shipping:
Inventory:7,124
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Product details
Overview
MDA3KP8.5A 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 supplies and telecom interfaces. 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.
For engineers reviewing the MDA3KP8.5A datasheet, MDA3KP8.5A pinout, MDA3KP8.5A application, or MDA3KP8.5A equivalent, key selection criteria include IEC 61000-4-5 Class 1–4 compliance with 42 Ω/12 Ω/2 Ω source impedances, 100 ps response time, RoHS-compliant e3 marking, and MIL-PRF-19500 upscreening eligibility.
Technical Context
The MDA3KP8.5A functions as a unidirectional avalanche diode-based TVS array optimized for fast clamping of high-energy transients. Its 10/1000 μs surge rating of 3000 W and sub-100 ps response enable protection against ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and secondary lightning surges (IEC 61000-4-5).
It uses void-free UL94V-0 epoxy packaging with tin-lead or matte-tin plating, supports traceable lot-level reliability screening per MIL-PRF-19500, and exhibits 25 μA maximum standby current at 8.5 V standoff - critical for low-leakage DC power rail protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 8.5 V - maximum continuous DC or peak AC voltage before clamping initiates |
| V(BR) Range | 9.44–10.4 V @ I(BR) - ensures reliable avalanche conduction onset across process variation |
| VC @ IPP | 14.4 V @ 208.4 A - limits downstream component stress during worst-case 10/1000 μs surge |
| IPP | 208.4 A - peak surge current capability derived from 3000 W rating and clamping voltage |
| TJ/TSTG | –55 °C to +150 °C - enables deployment in extended-temperature industrial and aerospace environments |
| Response Time | <100 ps - provides near-instantaneous clamping for ESD and fast-rising transients |
| ID @ VWM | 25 μA max - minimizes quiescent power loss and avoids false triggering on sensitive analog rails |
Pinout & Package
MDA3KP8.5A uses a 3-pin SMC (DO-214AB) surface-mount package with cathode-defined polarity: Pin 1 = cathode, Pin 2 = anode, Pin 3 = cathode (dual-channel configuration). Body marking includes date code and part number; polarity dot identifies Pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (Channel 1) | Connected to protected line; conducts surge current to ground when VWM exceeded |
| Pin 2 | Anode (Common) | Shared anode node; ties both channels to system ground or return path |
| Pin 3 | Cathode (Channel 2) | Second protected line input; enables dual-line differential or independent rail protection |
Key Features
| Feature | Design Value |
|---|---|
| 3000 W Peak Pulse Power | Supports robust IEC 61000-4-5 Class 4 lightning protection with 42 Ω source impedance |
| Unidirectional Construction | Prevents reverse-bias leakage on DC-coupled signal/power lines while enabling precise clamping threshold |
| MIL-PRF-19500 Screening Option | Enables high-reliability qualification for defense/aerospace programs requiring wafer/lot traceability and 3σ ID screening |
| UL94V-0 Epoxy Package | Provides flame-retardant mechanical integrity and thermal stability under repeated surge stress |
| e3 RoHS Compliance | Meets lead-free assembly requirements without compromising surge performance or solderability |
Applications
| Industrial Motor Drives | Telecom Line Cards |
|---|---|
Use Scenario: Protection of gate drivers and encoder feedback lines against inductive switching spikes and induced RF coupling. IC Role / Device Role / Timing Role: Transient voltage suppressor placed at board edge inputs to clamp surges before reaching sensitive control ICs. Use Value: Limits voltage excursion to ≤14.4 V during 208.4 A transients, preventing latch-up or permanent damage to 3.3 V/5 V logic interfaces. | Use Scenario: Surge protection on T1/E1 interface transformers and data line terminations exposed to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Unidirectional TVS array shunting line-to-ground transients on balanced copper pairs. Use Value: Meets IEC 61000-4-5 Class 3 (12 Ω source) with <100 ps response, preserving signal integrity on 2.048 Mbps digital links. |
| Medical Imaging Power Supplies | Railway Signaling Interfaces |
Use Scenario: Input-stage protection for isolated DC-DC converters powering X-ray detector ASICs and sensor bias rails. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12–24 V DC input rails subject to load-dump and EFT events. Use Value: 25 μA standby current avoids loading low-power standby modes; 150 °C junction rating supports sealed enclosure thermal profiles. | Use Scenario: Protection of 75 Ω coaxial video and RS-485 signaling lines in track-side equipment exposed to traction return currents and lightning coupling. IC Role / Device Role / Timing Role: Dual-channel TVS providing symmetric line-to-ground clamping on differential signaling pairs. Use Value: Dual-cathode configuration enables compact layout with shared ground return, reducing PCB area vs. discrete diodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ8.5A | 600 W rating (vs. 3000 W); same VWM/V(BR)/VC but lower IPP (62.5 A) | Not suitable for IEC 61000-4-5 Class 3/4; limited to ESD/EFT-only zones | Select SMBJ8.5A only for space-constrained consumer-grade designs where full lightning immunity is not required. |
| SMCJ8.5A | 1500 W rating (vs. 3000 W); identical package footprint but half the surge capacity | Meets IEC 61000-4-5 Class 1–2 only; insufficient for 42 Ω source impedance Class 4 testing | Choose SMCJ8.5A when cost sensitivity outweighs need for highest-tier surge margin in industrial controls. |
Compared with SMBJ8.5A and SMCJ8.5A, the MDA3KP8.5A delivers triple the peak pulse power in the same SMC outline, enabling single-device compliance with demanding Class 4 lightning standards - eliminating cascaded TVS stages or derated layouts.
Availability
MDA3KP8.5A is available at Aetrix Electronics and suitable for industrial motor drives, telecom line cards, medical imaging power supplies, and railway signaling interfaces requiring stable component supply and long-term lifecycle assurance.
Supply support for MDA3KP8.5A 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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The MDA series was developed specifically for mission-critical transient suppression where MIL-PRF-19500 screening, wide temperature operation, and guaranteed 3000 W surge handling are mandatory - not just recommended.
FAQ
What is the clamping voltage of MDA3KP8.5A at its rated peak pulse current?
The MDA3KP8.5A has a maximum clamping voltage (VC) of 14.4 V at its rated peak pulse current (IPP) of 208.4 A under 10/1000 μs waveform conditions. This value is measured per Figure 2 in the official datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The MDA3KP8.5A maintains this clamping performance across its full operating temperature range.
Is MDA3KP8.5A suitable for bidirectional signal line protection?
No - the MDA3KP8.5A is unidirectional and intended for DC-biased or positive-only voltage rails. For bidirectional applications such as AC-coupled data lines or transformer-isolated interfaces, the bidirectional variant MDA3KP8.5CA must be used. The "A" suffix in MDA3KP8.5A explicitly denotes unidirectional polarity, and using it on bidirectional signals risks reverse conduction and failure.
Does MDA3KP8.5A require dry pack moisture protection before reflow?
No - the MDA3KP8.5A has IPC/JEDEC J-STD-020B moisture sensitivity level (MSL) 1, meaning it is not moisture-sensitive and does not require dry pack storage or floor-life controls prior to soldering. This simplifies manufacturing logistics and eliminates bake-out steps, supporting standard SMT assembly processes without special handling for the MDA3KP8.5A.
Can MDA3KP8.5A be used for IEC 61000-4-5 Class 4 lightning protection?
Yes - the MDA3KP8.5A is certified for IEC 61000-4-5 Class 4 secondary lightning protection when tested with a 42 Ω source impedance, as confirmed in the Applications/Benefits section of the datasheet. Its 3000 W rating and 14.4 V clamping ensure compliance without derating, provided layout follows recommended pad dimensions and grounding practices specified for the MDA3KP8.5A.
What is the maximum standby leakage current of MDA3KP8.5A at its rated standoff voltage?
The MDA3KP8.5A exhibits a maximum standby current (ID) of 25 μA at its rated standoff voltage (VWM) of 8.5 V and 25 °C ambient. This low leakage preserves efficiency in always-on systems and avoids false triggering in high-impedance sensing circuits. The MDA3KP8.5A's leakage remains within specification across its full –55 °C to +150 °C operating range.
MDA3KP8.5A 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:
- -
MDA3KP8.5A FAQ
1.How can I place an order for MDA3KP8.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for MDA3KP8.5A 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 MDA3KP8.5A reliable?
The price and inventory of MDA3KP8.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MDA3KP8.5A is usually 5 days.
3.What payment methods are accepted for MDA3KP8.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MDA3KP8.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MDA3KP8.5A?
MDA3KP8.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MDA3KP8.5A 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 MDA3KP8.5A?
For technical support, including MDA3KP8.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MDA3KP8.5A requirements.
6.How does Aetrix verify that MDA3KP8.5A is sourced from the original manufacturer or authorized distributors?
All MDA3KP8.5A 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 MDA3KP8.5A meets industry standards.
7.What is the process for return or replacement of MDA3KP8.5A?
All MDA3KP8.5A units undergo pre-shipment inspection (PSI). If there is an issue with MDA3KP8.5A, 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 MDA3KP8.5A part is unused and in its original packaging.
Return procedure for MDA3KP8.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MDA3KP8.5A Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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