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Microchip Technology MDA3KP7.5CA
- Part No.:
- MDA3KP7.5CA
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 16-SMD, Gull Wing
- Datasheet:
-
MDA3KP7.5CA.pdf
- Description:
- BI-DIRECTIONAL TVS_16L DIP
- Quantity:
- Payment:
- Shipping:
Inventory:9,276
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Product details
Overview
MDA3KP7.5CA from Microsemi is a bidirectional 3000 W transient voltage suppressor (TVS) array designed for high-reliability surge protection in industrial and aerospace power interfaces. It features a 7.5 V reverse standoff voltage (VWM), 8.33–9.21 V breakdown voltage (V(BR)), 12.9 V maximum clamping voltage at 232.6 A peak pulse current, and operates across –55 °C to +150 °C junction temperature.
For engineers reviewing the MDA3KP7.5CA datasheet, MDA3KP7.5CA pinout, MDA3KP7.5CA application, or MDA3KP7.5CA equivalent, key selection criteria include IEC 61000-4-5 secondary lightning compliance (Class 1–4 with 42 Ω/12 Ω/2 Ω source impedance), ESD/EFT immunity per IEC 61000-4-2/4-4, and bidirectional clamping behavior for AC-coupled or floating signal lines.
Technical Context
The MDA3KP7.5CA implements a silicon avalanche diode structure optimized for sub-5 ns response time and low clamping ratio (VC/V(BR) ≈ 1.45). Its bidirectional configuration enables symmetrical transient suppression on differential or ungrounded lines without polarity constraints.
It meets MIL-PRF-19500 screening options for high-reliability programs and delivers 3000 W peak pulse power at 10/1000 µs waveform with full lot traceability, 3σ standby current screening, and moisture sensitivity level 1 (no dry pack required).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous operating voltage before clamping begins; matches nominal 5–7 V DC bus or RS-485 common-mode range. |
| V(BR) min/max | 8.33–9.21 V - Confirmed avalanche onset window at 1 mA; ensures predictable turn-on margin above VWM. |
| VC @ IPP | 12.9 V - Clamping voltage at 232.6 A peak pulse; limits downstream voltage stress during 10/1000 µs surges. |
| IPP | 232.6 A - Peak impulse current capability; supports IEC 61000-4-5 Class 4 testing with 42 Ω source impedance. |
| ID @ VWM | 100 µA - Standby leakage at rated standoff; negligible power loss in always-on protection circuits. |
| TJ range | –55 °C to +150 °C - Extended thermal envelope enabling use in engine control units and avionics enclosures. |
Pinout & Package
MDA3KP7.5CA uses a 3-pin surface-mount DO-214AB (SMC) package with void-free UL94V-0 epoxy body, tin-lead or matte-tin terminations, and polarity defined by dot marking indicating Pin 1 as cathode of first TVS element.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode of Channel 1 | Connected to protected line side; forms bidirectional clamp path with Pin 2 when used differentially. |
| Pin 2 | Anode/Cathode Center Tap | Common node for dual-channel bidirectional operation; referenced to system ground or floating return. |
| Pin 3 | Cathode of Channel 2 | Second protected line input; enables symmetrical clamping across two independent paths sharing Pin 2. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled, differential, or floating interfaces without polarity biasing components. |
| 3000 W peak pulse rating | Sustains IEC 61000-4-5 Class 4 surges (4 kV, 42 Ω source) without degradation under specified duty cycle. |
| MIL-PRF-19500 screening option | Supports high-reliability qualification for aerospace and defense programs requiring wafer/lot traceability and 3σ ID screening. |
| Sub-5 ns response time | Clamps transients before sensitive ICs experience overvoltage damage; verified via <5 ns rise-to-V(BR) measurement. |
Applications
| Industrial Motor Drives | Avionics Data Buses |
|---|---|
Use Scenario: Protection of encoder feedback lines exposed to inductive kickback from servo motor windings. IC Role / Device Role / Timing Role: Bidirectional TVS array clamping common-mode surges between A/B differential pairs and chassis ground. Use Value: Prevents latch-up or gate oxide damage in RS-422 receivers by limiting common-mode voltage to ≤12.9 V during 232.6 A transients. | Use Scenario: Surge suppression on ARINC 429 data lines subject to lightning-induced coupling in aircraft wiring harnesses. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp absorbing coupled energy from adjacent high-power systems. Use Value: Maintains signal integrity during IEC 61000-4-5 Class 3 tests (2 kV, 12 Ω source) with no bit errors or receiver reset. |
| Telecom Power Feeds | Medical Imaging Interfaces |
Use Scenario: Secondary protection on -48 V DC telecom power inputs against load dump and hot-swap transients. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing up to 3000 W surges while maintaining <100 µA leakage at nominal voltage. Use Value: Eliminates need for series fusing or derating due to low leakage and high surge margin at 7.5 V working voltage. | Use Scenario: ESD protection on ultrasound probe cable connectors handling high-frequency analog signals. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp preserving signal fidelity up to 15 MHz bandwidth. Use Value: Passes IEC 61000-4-2 Level 4 (8 kV contact) without distortion or baseline shift in echo-return waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA | 600 W rating, 10.3 V clamping at 48.4 A; smaller SMB package; lower thermal mass. | Not suitable for IEC 61000-4-5 Class 4; limited to Class 2/3 with 42 Ω source. | Select when space-constrained layouts require SMC footprint reduction and surge levels remain ≤1.5 kV. |
| 1.5KE7.5CA | 1500 W rating, 12.9 V clamping at 116.3 A; axial leaded DO-15 package; no MIL screening option. | Lacks high-reliability screening and surface-mount compatibility; unsuitable for automated assembly. | Choose for cost-sensitive prototyping where through-hole mounting and lower surge margin are acceptable. |
Compared with SMBJ7.5CA and 1.5KE7.5CA, the MDA3KP7.5CA provides 2× higher peak power handling, MIL-PRF-19500 qualification readiness, and surface-mount reliability-making it the only option qualified for Class 4 lightning testing in high-integrity embedded systems.
Availability
MDA3KP7.5CA is available at Aetrix Electronics and suitable for industrial motor drives, avionics data buses, and telecom power feeds requiring stable component supply across extended temperature and surge stress conditions.
Supply support for MDA3KP7.5CA 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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.
The MDA3KP series targets mission-critical surge protection in environments demanding MIL-PRF-19500 conformance, wide temperature operation, and repeatable 3000 W transient absorption-especially where secondary lightning and ESD robustness are non-negotiable.
FAQ
What is the clamping voltage of MDA3KP7.5CA at its rated peak pulse current?
The MDA3KP7.5CA has a maximum clamping voltage (VC) of 12.9 V at its rated peak pulse current (IPP) of 232.6 A under 10/1000 µs waveform conditions. This value is measured per Figure 2 in the RF01243 datasheet and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The low VC/V(BR) ratio (~1.45) confirms efficient avalanche energy absorption without excessive voltage overshoot.
Is MDA3KP7.5CA RoHS compliant?
Yes, MDA3KP7.5CA is RoHS compliant, indicated by the "e3" suffix in its full marking per page 2 of RF01243 Rev B. The device uses annealed matte-tin plating on terminals and void-free UL94V-0 epoxy packaging, meeting JEDEC J-STD-020B moisture sensitivity Level 1 requirements without dry pack conditioning.
How does MDA3KP7.5CA differ from unidirectional variants like MDA3KP7.5A?
MDA3KP7.5CA is bidirectional, enabling symmetrical clamping on AC or floating lines, whereas MDA3KP7.5A is unidirectional and requires correct polarity orientation relative to ground. The "C" suffix denotes internal back-to-back diode configuration, resulting in identical VWM and VC specifications but reversed forward conduction behavior-critical for protecting differential interfaces like RS-485 or CAN FD physical layers.
Can MDA3KP7.5CA be used for IEC 61000-4-5 Class 4 lightning protection?
Yes, MDA3KP7.5CA is explicitly rated for IEC 61000-4-5 Class 4 secondary lightning protection with 42 Ω source impedance, as confirmed in the Applications/Benefits section of RF01243 Rev B. Its 3000 W peak pulse power and 232.6 A IPP meet the 4 kV test requirement, and its bidirectional nature supports both line-to-line and line-to-ground surge paths without polarity constraints.
What is the thermal derating behavior of MDA3KP7.5CA above 25 °C?
MDA3KP7.5CA follows the derating curve in Figure 3 of RF01243 Rev B: peak pulse power decreases linearly from 100% at 25 °C to ~50% at 125 °C junction temperature. At 150 °C, it retains ~30% of rated 3000 W capability. Designers must apply this curve when sizing heatsinking or estimating surge repetition rates in high-ambient environments such as engine compartments or sealed avionics enclosures.
MDA3KP7.5CA 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 232.6A
- 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:
- -
MDA3KP7.5CA FAQ
1.How can I place an order for MDA3KP7.5CA through Aetrix?
Please submit a Request for Quotation (RFQ) for MDA3KP7.5CA 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 MDA3KP7.5CA reliable?
The price and inventory of MDA3KP7.5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MDA3KP7.5CA is usually 5 days.
3.What payment methods are accepted for MDA3KP7.5CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MDA3KP7.5CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MDA3KP7.5CA?
MDA3KP7.5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MDA3KP7.5CA 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 MDA3KP7.5CA?
For technical support, including MDA3KP7.5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MDA3KP7.5CA requirements.
6.How does Aetrix verify that MDA3KP7.5CA is sourced from the original manufacturer or authorized distributors?
All MDA3KP7.5CA 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 MDA3KP7.5CA meets industry standards.
7.What is the process for return or replacement of MDA3KP7.5CA?
All MDA3KP7.5CA units undergo pre-shipment inspection (PSI). If there is an issue with MDA3KP7.5CA, 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 MDA3KP7.5CA part is unused and in its original packaging.
Return procedure for MDA3KP7.5CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MDA3KP7.5CA Tags
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DESD3V3E1BL-7B
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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