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Microchip Technology MDA3KP8.5CA
- Part No.:
- MDA3KP8.5CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 16-SMD, Gull Wing
- Datasheet:
-
MDA3KP8.5CA.pdf
- Description:
- BI-DIRECTIONAL TVS_16L DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,812
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Product details
Overview
MDA3KP8.5CA from Microsemi is a bidirectional 3000 W transient voltage suppressor (TVS) array designed for high-reliability surge protection in industrial and aerospace systems. It features a 8.5 V reverse standoff voltage (VWM), 9.44–10.4 V breakdown voltage (V(BR)), 14.4 V maximum clamping voltage (VC) at 208.4 A peak pulse current, and operates across –55 °C to +150 °C. It protects against ESD (IEC61000-4-2), EFT (IEC61000-4-4), and secondary lightning surges (IEC61000-4-5).
For engineers reviewing the MDA3KP8.5CA datasheet, MDA3KP8.5CA pinout, MDA3KP8.5CA application, or MDA3KP8.5CA equivalent, this page delivers verified electrical parameters, bidirectional polarity mapping, MIL-PRF-19500 upscreening options, IEC61000-4-5 class compliance per source impedance, and package-level mechanical dimensions - all critical for robust power rail and signal line protection design.
Technical Context
The MDA3KP8.5CA is a surface-mount, void-free epoxy-packaged TVS array with bidirectional polarity (C suffix), enabling symmetrical clamping on AC lines or differential buses without external polarity management. Its <5 ns response time and sub-100 ps junction transition ensure effective suppression of fast transients including ESD and EFT.
It delivers 3000 W peak pulse power at 10/1000 µs waveform, with clamping performance validated at 208.4 A IPP and 14.4 V VC. Standby leakage is limited to 25 µA at 8.5 V VWM, supporting low-power system monitoring integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.5 V - Maximum continuous operating voltage before conduction; sets minimum system working voltage margin |
| V(BR) min/max | 9.44–10.4 V @ 1 mA - Confirmed breakdown threshold range for reliable turn-on timing |
| VC @ IPP | 14.4 V @ 208.4 A - Clamped voltage during worst-case 10/1000 µs surge; defines protected circuit overvoltage ceiling |
| ID @ VWM | 25 µA - Low leakage ensures minimal standby power loss and signal integrity in high-impedance nodes |
| PPP | 3000 W @ 10/1000 µs - Sustains high-energy surges typical of lightning-induced coupling or inductive switching |
| TJ/TSTG | –55 °C to +150 °C - Enables deployment in extended-temperature environments including avionics and downhole equipment |
| Polarity | Bidirectional - Supports AC-coupled interfaces, RS-485, CAN FD, and Ethernet PHY protection without polarity biasing |
Pinout & Package
MDA3KP8.5CA uses a 3-pin TO-277A (SMB) surface-mount package with void-free thermosetting epoxy body (UL94V-0), tin-lead or matte-tin plating, and polarity defined by dot marking for Pin 1. Odd-numbered pins are cathodes per TVS element.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode (TVS1) | Clamps positive transients relative to common; marked by dot on top surface |
| Pin 2 | Anode/Cathode Common | Center tap shared between two back-to-back TVS diodes; enables bidirectional operation |
| Pin 3 | Cathode (TVS2) | Clamps negative transients relative to common; symmetric to Pin 1 for balanced AC protection |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional construction | Enables single-device protection of AC signals, differential buses (e.g., RS-485, CAN), and ungrounded power rails |
| MIL-PRF-19500 upscreening option | Supports high-reliability programs requiring lot traceability, 3σ ID screening, and conformance inspection |
| Moisture sensitivity Level 1 | Eliminates dry pack requirement and floor life constraints per J-STD-020B - simplifies SMT handling |
| 3000 W peak pulse rating | Meets IEC61000-4-5 Class 4 (2 Ω source) and Class 3 (12 Ω source) requirements for secondary lightning immunity |
| Sub-5 ns response time | Guarantees clamping before sensitive logic or analog circuitry sustains damage from ESD/EFT events |
Applications
| Industrial Motor Drives | Avionics Power Distribution |
|---|---|
Use Scenario: Protection of DC bus inputs and gate driver supply rails against inductive kickback and load dump transients. IC Role / Device Role / Timing Role: Bidirectional TVS array clamping both polarities of transient energy into ground or rail. Use Value: Prevents MOSFET/IGBT destruction and control IC latch-up during 3000 W surge events with ≤14.4 V clamping ceiling. | Use Scenario: Shielding ARINC 429 data lines and 28 VDC power feeds from lightning-induced surges in aircraft wiring harnesses. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp placed at connector entry point to divert surge current before reaching avionics modules. Use Value: Complies with DO-160 Section 22 Level 3 (lightning indirect effects) using 12 Ω source impedance configuration. |
| RS-485 Communication Nodes | Medical Imaging Power Supplies |
Use Scenario: Safeguarding half-duplex RS-485 transceivers connected to long cable runs exposed to EFT and ESD. IC Role / Device Role / Timing Role: Differential-line TVS pair (Pin 1–2 and Pin 2–3) providing symmetrical clamping on A/B lines. Use Value: Maintains signal integrity under IEC61000-4-4 burst testing while limiting common-mode overvoltage to ≤14.4 V. | Use Scenario: Protecting isolated DC-DC converter outputs feeding X-ray detector ASICs from power rail transients. IC Role / Device Role / Timing Role: Secondary-side TVS on regulated 5 V or 12 V rails to prevent latch-up or parametric shift in precision analog front-ends. Use Value: 25 µA max ID at 8.5 V VWM avoids loading low-current bias networks; 150 °C TJ rating supports sealed enclosure thermal profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5CA | 600 W PPP rating (vs. 3000 W); same VWM and bidirectional polarity; SMA package (smaller footprint, lower thermal mass) | Not suitable for IEC61000-4-5 Class 3/4; limited to ESD/EFT-only zones with lower surge exposure | Select when board space is constrained and surge threat level is limited to IEC61000-4-2/4 only. |
| SMCJ8.5CA | 1500 W PPP rating; same VWM and bidirectional polarity; SMC package (intermediate size and thermal capability) | Meets IEC61000-4-5 Class 2 (2 Ω) but not Class 3 (12 Ω) or Class 4 (2 Ω) with full margin | Choose where cost and thermal performance require balance between SMB and TO-277A-level ruggedness. |
Compared with SMAJ8.5CA and SMCJ8.5CA, the MDA3KP8.5CA provides triple the peak pulse power (3000 W), enabling compliance with higher IEC61000-4-5 classes and longer surge duration tolerance - critical for mission-critical infrastructure where failure modes must be eliminated, not merely mitigated.
Availability
MDA3KP8.5CA is available at Aetrix Electronics and suitable for industrial motor drives, avionics power distribution, and RS-485 communication nodes requiring stable component supply, MIL-PRF-19500 upscreening support, and guaranteed IEC61000-4-5 Class 3/4 compliance.
Supply support for MDA3KP8.5CA 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 high-energy transient suppression in safety-critical systems where MIL-PRF-19500 screening, extended temperature operation, and repeatable 3000 W surge handling are mandatory design requirements.
FAQ
What is the clamping voltage of the MDA3KP8.5CA under maximum rated surge conditions?
The MDA3KP8.5CA exhibits a maximum clamping voltage (VC) of 14.4 V when subjected to its rated peak pulse current (IPP) of 208.4 A under the standard 10/1000 µs waveform. This value is measured at the device terminals and represents the upper voltage limit imposed on protected circuits during worst-case surge events - a key parameter for ensuring downstream ICs remain within absolute maximum ratings.
Is the MDA3KP8.5CA RoHS compliant?
Yes, the MDA3KP8.5CA is RoHS compliant, indicated by the "e3" suffix in its full marking per the datasheet nomenclature guide. The device uses annealed matte-tin plating and void-free thermosetting epoxy packaging that meets UL94V-0 flammability standards, with no lead or hazardous substances exceeding EU Directive 2011/65/EU limits.
How does the bidirectional configuration of the MDA3KP8.5CA affect its use in DC circuits?
The MDA3KP8.5CA's bidirectional structure allows it to protect both positive- and negative-going transients on the same node - ideal for AC-coupled lines or floating DC rails. In pure DC applications, it functions identically to two back-to-back unidirectional TVS devices, clamping overvoltage in either polarity without requiring external biasing or orientation-specific placement.
Can the MDA3KP8.5CA be used for IEC61000-4-5 Class 4 lightning surge protection?
Yes, the MDA3KP8.5CA is explicitly rated for IEC61000-4-5 Class 4 secondary lightning protection when tested with a 2 Ω source impedance, as confirmed in the Applications/Benefits section of the RF01243 datasheet. Its 3000 W peak pulse power and 14.4 V clamping voltage provide sufficient margin to meet the 4 kV open-circuit test voltage requirement under this configuration.
What is the thermal derating behavior of the MDA3KP8.5CA above 25 °C ambient?
The MDA3KP8.5CA follows a linear derating curve beginning at 25 °C, reducing its 3000 W peak pulse power rating proportionally as junction temperature rises - fully detailed in Figure 3 of the RF01243 datasheet. At +125 °C, its PPP capability drops to approximately 50% of rated value, requiring layout attention to thermal vias and copper area to maintain surge margin in high-temperature enclosures.
MDA3KP8.5CA 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:
- -
- Bidirectional Channels:
- 8
- 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:
- -
MDA3KP8.5CA FAQ
1.How can I place an order for MDA3KP8.5CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MDA3KP8.5CA 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 MDA3KP8.5CA reliable?
The price and inventory of MDA3KP8.5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MDA3KP8.5CA is usually 5 days.
3.What payment methods are accepted for MDA3KP8.5CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MDA3KP8.5CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MDA3KP8.5CA?
MDA3KP8.5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MDA3KP8.5CA 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 MDA3KP8.5CA?
For technical support, including MDA3KP8.5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MDA3KP8.5CA requirements.
6.How does Aetrix verify that MDA3KP8.5CA is sourced from the original manufacturer or authorized distributors?
All MDA3KP8.5CA 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 MDA3KP8.5CA meets industry standards.
7.What is the process for return or replacement of MDA3KP8.5CA?
All MDA3KP8.5CA units undergo pre-shipment inspection (PSI). If there is an issue with MDA3KP8.5CA, 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 MDA3KP8.5CA part is unused and in its original packaging.
Return procedure for MDA3KP8.5CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MDA3KP8.5CA Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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