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Microchip Technology MADA3KP18A
- Part No.:
- MADA3KP18A
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- 16-SMD, Gull Wing
- Datasheet:
-
MADA3KP18A.pdf
- Description:
- UNI-DIRECTIONAL TVS_16L DIP
- Quantity:
- Payment:
- Shipping:
Inventory:5,717
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Product details
Overview
MDA3KP18A from Microsemi is a unidirectional 3000 W surface-mount transient voltage suppressor (TVS) array with 18 V standoff voltage (VWM), 20.0–22.1 V breakdown voltage (V(BR)), and 29.2 V clamping voltage (VC) at 102.8 A peak pulse current (IPP). It delivers secondary lightning protection per IEC61000-4-5 (42 Ω, Class 1–4; 12 Ω, Class 1–3; 2 Ω, Class 3), ESD/EFT suppression per IEC61000-4-2/4-4, and inductive switching transient protection in industrial power interfaces.
For engineers reviewing the MDA3KP18A datasheet, MDA3KP18A pinout, MDA3KP18A application, or MDA3KP18A equivalent, key selection criteria include its 18 V working voltage, 29.2 V clamping performance at 102.8 A, -55 to +150 °C operating range, RoHS-compliant void-free epoxy package, and verified compliance with MIL-PRF-19500 high-reliability screening options.
Technical Context
The MDA3KP18A operates as a unidirectional avalanche diode-based TVS, triggered when reverse voltage exceeds its 20.0–22.1 V breakdown threshold. Its <100 ps response time enables sub-nanosecond clamping during ESD events, while sustaining 3000 W peak pulse power under 10/1000 µs waveform conditions.
Designed for robustness in harsh environments, it features wafer-level lot traceability, 100% surge testing, and moisture sensitivity level 1 (no dry pack required). Its clamping behavior is characterized at IPP = 102.8 A, delivering VC = 29.2 V - critical for protecting downstream 24 V rail components without overvoltage stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - maximum continuous reverse operating voltage before conduction begins; matches standard 18 V industrial control rails. |
| V(BR) min–max | 20.0–22.1 V - guaranteed avalanche onset range at 1 mA; ensures consistent turn-on across temperature and process variation. |
| VC @ IPP | 29.2 V at 102.8 A - clamping voltage under full 3000 W surge; limits protected circuit voltage to safe margin below 30 V logic thresholds. |
| PPP | 3000 W @ 10/1000 µs - peak pulse power rating; supports IEC61000-4-5 Level 4 secondary lightning surges with 42 Ω source impedance. |
| ID @ VWM | 2 µA - ultra-low leakage at rated standoff; avoids loading of high-impedance sensor or reference circuits. |
| TJ/TSTG | -55 to +150 °C - extended junction/storage temperature range; qualified for under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
Pinout & Package
MDA3KP18A uses a 3-pin surface-mount DO-214AB (SMC) package with cathode-anode-cathode terminal configuration. Pin 1 (cathode) and Pin 3 (cathode) are electrically common; Pin 2 is the anode. Polarity is marked by a dot on the package top adjacent to Pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Cathode | Common cathode connection for unidirectional TVS operation; ties to protected line's positive rail via series impedance. |
| Pin 2 | Anode | Ground reference node; must be low-inductance path to system ground plane to ensure effective clamping. |
| Pin 3 | Cathode | Redundant cathode terminal; paralleled internally with Pin 1 to reduce package inductance and improve high-frequency surge response. |
Key Features
| Feature | Design Value |
|---|---|
| 3000 W peak pulse power | Enables single-device protection against severe IEC61000-4-5 Class 4 surges without parallel staging or derating. |
| Unidirectional construction | Prevents forward conduction during normal 18 V DC operation while providing robust reverse transient clamping. |
| MIL-PRF-19500 screening option | Supports high-reliability programs requiring lot traceability, burn-in, and parametric screening per military specification. |
| Moisture Sensitivity Level 1 | Eliminates baking requirement prior to reflow; compatible with standard SMT assembly lines without process modification. |
| Void-free UL94V-0 epoxy case | Ensures mechanical integrity and flame resistance in enclosed industrial enclosures and power supply modules. |
Applications
| Industrial Motor Drives | Telecom Power Feeds |
|---|---|
Use Scenario: Protection of 24 V DC input stages in variable frequency drives exposed to inductive kickback from contactor switching and long cable runs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed across input terminals to shunt >1 kA transients within 100 ps. Use Value: Limits voltage excursion to ≤29.2 V during 102.8 A surges, preventing gate oxide damage to upstream DC-DC controllers and MOSFET drivers. | Use Scenario: Secondary lightning surge protection on -48 V telecom power distribution boards in central office equipment. IC Role / Device Role / Timing Role: Standoff-rated TVS deployed at board edge to absorb 42 Ω IEC61000-4-5 Class 4 surges before they reach DC/DC converters. Use Value: Maintains 18 V standoff compatibility with -48 V systems using positive-ground architecture while clamping to 29.2 V referenced to chassis ground. |
| Automotive Body Control Modules | Industrial PLC I/O Terminals |
Use Scenario: Protection of LIN bus power rails and microcontroller supply pins in under-hood BCMs subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 12 V auxiliary rail, coordinated with upstream fuses and downstream LDOs. Use Value: Withstands -55 to +150 °C ambient and delivers stable 29.2 V clamping across temperature, ensuring MCU brown-out immunity during transients. | Use Scenario: Input protection for 24 V digital input modules receiving signals from field sensors and actuators in factory automation. IC Role / Device Role / Timing Role: Front-end TVS on each isolated channel to suppress EFT bursts (IEC61000-4-4) and ESD (IEC61000-4-2). Use Value: 2 µA standby leakage prevents false triggering of optocoupled inputs; 102.8 A IPP rating handles repetitive 5 kHz burst sequences without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ18A | 600 W PPP rating, SMA package, 27.7 V VC @ 21.2 A IPP - lower power handling and higher clamping voltage. | Not suitable for IEC61000-4-5 Class 4; limited to Class 2/3 or ESD-only use cases. | Select when space-constrained layouts require smaller footprint and surge energy is ≤600 W. |
| SMCJ18A | 1500 W PPP rating, same SMC package, 29.2 V VC @ 51.4 A IPP - half the peak power and current capability. | Meets IEC61000-4-5 Class 3 (42 Ω) but not Class 4; insufficient for full 3000 W surge duty cycles. | Choose where cost optimization is prioritized and worst-case surge energy is confirmed ≤1500 W. |
Compared with SMAJ18A and SMCJ18A, the MDA3KP18A provides double the peak pulse power of SMCJ18A and five times that of SMAJ18A, enabling single-device Class 4 lightning protection without parallel devices or thermal derating - critical for high-availability industrial and telecom infrastructure.
Availability
MDA3KP18A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power feeds, and automotive body control modules requiring stable component supply, long-term lifecycle support, and high-reliability screening options.
Supply support for MDA3KP18A 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 ICs and discrete components.
The MDA3KP series was developed specifically for mission-critical transient suppression in aerospace, defense, and industrial systems where MIL-PRF-19500 compliance, lot traceability, and 3000 W surge capability are mandatory design requirements.
FAQ
What is the clamping voltage of MDA3KP18A at its rated peak pulse current?
The MDA3KP18A has a maximum clamping voltage (VC) of 29.2 V at its rated peak pulse current (IPP) of 102.8 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 circuits during worst-case surge events. The MDA3KP18A maintains this clamping performance across its full operating temperature range.
Is MDA3KP18A RoHS compliant?
Yes, MDA3KP18A is RoHS compliant, indicated by the "e3" suffix in its full marking per the part nomenclature on page 2 of the datasheet. The device uses annealed matte-tin plating on terminals and a void-free thermosetting epoxy body meeting UL94V-0, fully conforming to Directive 2011/65/EU and subsequent amendments without exemptions.
Can MDA3KP18A be used for bidirectional transient protection?
No, MDA3KP18A is unidirectional only, as confirmed by its "A" suffix and absence of "C" in the part number. Bidirectional variants such as MDA3KP18CA exist in the same family but feature symmetrical breakdown in both polarities. Using MDA3KP18A in bidirectional applications risks forward conduction and failure during negative transients.
What is the standoff voltage rating of MDA3KP18A and how does it relate to system design?
The MDA3KP18A has a rated reverse standoff voltage (VWM) of 18 V, meaning it remains non-conductive up to this DC or peak AC voltage. System designers must ensure the nominal operating voltage - including ripple, tolerance, and transients - stays at or below 18 V to prevent premature conduction. For example, it is appropriate for 15–18 V nominal rails but not for 24 V systems without derating or additional series impedance.
Does MDA3KP18A require special handling or baking before reflow soldering?
No, MDA3KP18A has a moisture sensitivity level (MSL) of 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions and placed directly into reflow without baking. This eliminates pre-conditioning steps and reduces manufacturing risk in high-volume SMT lines - a key advantage over MSL 3+ TVS devices.
MADA3KP18A 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):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 102.8A
- 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:
- -
MADA3KP18A FAQ
1.How can I place an order for MADA3KP18A through Aetrix?
Please submit a Request for Quotation (RFQ) for MADA3KP18A 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 MADA3KP18A reliable?
The price and inventory of MADA3KP18A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MADA3KP18A is usually 5 days.
3.What payment methods are accepted for MADA3KP18A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MADA3KP18A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MADA3KP18A?
MADA3KP18A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MADA3KP18A 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 MADA3KP18A?
For technical support, including MADA3KP18A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MADA3KP18A requirements.
6.How does Aetrix verify that MADA3KP18A is sourced from the original manufacturer or authorized distributors?
All MADA3KP18A 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 MADA3KP18A meets industry standards.
7.What is the process for return or replacement of MADA3KP18A?
All MADA3KP18A units undergo pre-shipment inspection (PSI). If there is an issue with MADA3KP18A, 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 MADA3KP18A part is unused and in its original packaging.
Return procedure for MADA3KP18A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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