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Vishay General Semiconductor - Diodes Division SMP20-M3/84A
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- Part No.:
- SMP20-M3/84A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-220AA
- Datasheet:
-
SMP20-M3/84A.pdf
- Description:
- TVS DIODE 20VWM 35.8VC DO220AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,289
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Product details
Overview
SMP20-M3/84A from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) designed for clamping inductive switching surges and lightning-induced transients on power rails and signal lines. It features a 20 V standoff voltage (VWM), 22.2–24.5 V breakdown voltage (VBR), 400 W peak pulse power (10/1000 μs), 12.3 A peak pulse current (IPPM), and clamps to ≤32.4 V at rated surge. It protects MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom line cards.
For engineers reviewing the SMP20-M3/84A datasheet, SMP20-M3/84A pinout, SMP20-M3/84A application, or SMP20-M3/84A equivalent, this page delivers verified electrical specs, DO-220AA package dimensions, clamping behavior under 10/1000 μs transients, thermal resistance data (RθJA = 250 °C/W), and validated alternatives for overvoltage protection design.
Technical Context
The SMP20-M3/84A operates as a unidirectional avalanche diode with sharp reverse-breakdown onset above 22.2 V, enabling precise overvoltage clamping before downstream components reach stress limits. Its low 1.0 mm profile and DO-220AA (SMP) package support high-density automated PCB assembly in space-constrained modules.
It delivers 400 W peak pulse power per 10/1000 μs waveform when mounted on 5.0 mm × 5.0 mm copper pads per terminal, with clamping voltage fixed at ≤32.4 V at 12.3 A IPPM. Thermal resistance is characterized at RθJL = 50 °C/W and RθJA = 250 °C/W, supporting operation up to TJ = +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 22.2 V / 24.5 V - Breakdown initiates within this range at 1 mA test current, defining clamping threshold |
| VC @ IPPM | ≤32.4 V - Clamped voltage during 12.3 A 10/1000 μs surge, limiting stress on protected ICs |
| PPPM | 400 W - Peak transient energy absorption capability under standardized surge waveform |
| IFSM | 40 A - Non-repetitive forward surge rating for accidental polarity events |
| TJ max. | +150 °C - Maximum junction temperature enabling use in hot industrial environments |
| RθJA | 250 °C/W - Junction-to-ambient thermal resistance on standard PCB layout, guiding heatsinking needs |
Pinout & Package
Package: DO-220AA (SMP), ultra-low-profile surface-mount case with matte tin-plated leads, halogen-free, RoHS-compliant, MSL Level 1, 260 °C reflow compatible. Cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., GND or return) in unidirectional TVS configuration |
| Cathode | Clamping node | Connected to protected line (e.g., 20 V rail); conducts avalanche current when voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables robust protection against IEC 61000-4-5 Level 3 surges without derating in compact layouts |
| 1.0 mm typical height | Reduces board stack height in slim telecom modules and portable industrial controllers |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), improving IC survivability |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without moisture sensitivity concerns or baking requirements |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates for industrial and telecom end equipment |
Applications
| Industrial Power Supply Input Protection | Telecom Line Card Surge Suppression |
|---|---|
Use Scenario: Protecting DC input rails of 24 V industrial PSUs against inductive kickback from relay coils and motor drivers. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 20 V rail and ground to clamp transients before they reach DC-DC controller ICs. Use Value: Limits voltage excursions to ≤32.4 V during 400 W surges, preventing latch-up or gate oxide damage in upstream regulators. |
Use Scenario: Safeguarding Ethernet PHY interface power pins (e.g., 20 V bias supply) against lightning-induced surges on outdoor telecom line cards. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing common-mode surges coupled onto power traces from connected cables. Use Value: Maintains system uptime by diverting >12 A transient current away from sensitive PHY ICs while holding clamped voltage below absolute maximum ratings. |
| MOSFET Gate Driver Protection | Sensor Signal Line Clamping |
Use Scenario: Shielding high-side N-channel MOSFET gate drivers in motor control inverters from shoot-through-induced voltage spikes. IC Role / Device Role / Timing Role: TVS placed across driver output and ground to clamp fast dv/dt transients generated during switching transitions. Use Value: Prevents gate oxide breakdown by clamping spikes to ≤32.4 V within nanoseconds, preserving driver reliability over 10⁶ cycles. |
Use Scenario: Protecting analog outputs of industrial pressure/temperature sensors (e.g., 4–20 mA loop powered from 20 V) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS on sensor V+ line to absorb contact discharge without distorting low-bandwidth signals. Use Value: Ensures measurement integrity by suppressing >15 kV ESD pulses while adding <0.5 pF parasitic capacitance, avoiding signal attenuation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMP20A-M3/84A | Same electrical specs and DO-220AA package; identical marking code BV and VBR range (22.2–24.5 V) | No functional difference; SMP20-M3/84A is manufacturer's preferred P/N for SMP20A variant in 7" tape | Select SMP20-M3/84A for standard 3000-unit reel delivery; SMP20A-M3/84A is cross-listed but less commonly stocked |
| SMBJ20A | DO-214AA package (larger footprint, 2.3 mm height), same VWM/VBR/PPPM, higher RθJA (300 °C/W) | Requires PCB layout change; suitable where thermal margin allows larger case or legacy SMB footprint is retained | Choose SMBJ20A only if existing design uses SMB packages or requires higher IFSM (100 A vs. 40 A) |
Compared with SMP20A-M3/84A, the SMP20-M3/84A offers identical protection performance in the same ultra-low-profile DO-220AA package but with optimized logistics for high-volume SMT lines. Against SMBJ20A, it reduces board area by 45 % and lowers thermal resistance by 17 %, enabling denser, cooler-running designs where space is constrained.
Availability
SMP20-M3/84A is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, motor control gate drivers, and sensor interface protection requiring stable component supply and full traceability.
Supply support for SMP20-M3/84A 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, power handling, and automotive-grade qualification.
The SMP series was developed to deliver high-power transient suppression in minimal PCB area, targeting space-critical applications in industrial automation, telecom infrastructure, and consumer power adapters where low profile and automated assembly are mandatory.
FAQ
What is the standoff voltage rating of the SMP20-M3/84A?
The SMP20-M3/84A has a reverse standoff voltage (VWM) of 20 V, meaning it remains non-conductive up to this DC or RMS voltage level. This rating ensures compatibility with 20 V nominal power rails while providing margin before avalanche breakdown begins at minimum 22.2 V. The SMP20-M3/84A maintains leakage current below 1.0 μA at VWM, minimizing standby power loss in always-on systems.
Does the SMP20-M3/84A meet RoHS and halogen-free requirements?
Yes, the SMP20-M3/84A is halogen-free and RoHS-compliant per JEDEC JS709A and EU Directive 2011/65/EU. Its molding compound meets UL 94 V-0 flammability rating, and matte tin-plated leads comply with J-STD-002 solderability standards. The "M3" suffix confirms compliance and JESD 201 Class 1A whisker resistance, making the SMP20-M3/84A suitable for high-reliability industrial deployments.
What is the clamping voltage of the SMP20-M3/84A under surge conditions?
The SMP20-M3/84A clamps to a maximum of 32.4 V when subjected to its rated 12.3 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This clamping voltage is guaranteed across temperature and lifetime, ensuring downstream ICs-such as microcontrollers or gate drivers rated for 36 V absolute maximum-remain within safe operating limits during transient events. The SMP20-M3/84A achieves this with low incremental surge resistance for minimal overshoot.
Can the SMP20-M3/84A be used in bidirectional configurations?
No, the SMP20-M3/84A is strictly unidirectional, with cathode marked by a color band and designed for anode-to-ground orientation. It does not provide symmetrical clamping for AC or bipolar transients. For bidirectional protection, Vishay offers separate dual-diode configurations (e.g., SMBJ20CA) or discrete back-to-back arrangements-not implemented in the SMP20-M3/84A. Using the SMP20-M3/84A in reverse polarity risks permanent failure.
What is the thermal resistance of the SMP20-M3/84A, and how does it affect layout?
The SMP20-M3/84A has a junction-to-ambient thermal resistance (RθJA) of 250 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal, per datasheet condition. This value guides minimum pad sizing: reducing pad area increases RθJA, risking junction overheating during repetitive surges. Layout must maintain ≥5 mm² copper per terminal and avoid thermal isolation; the SMP20-M3/84A's RθJL of 50 °C/W further supports heat transfer to internal ground planes.
SMP20-M3/84A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-220AA
- Series:
- TransZorb®, eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 35.8V
- Current - Peak Pulse (10/1000µs):
- 11.2A
- Power - Peak Pulse:
- 400W
- 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:
- DO-220AA (SMP)
SMP20-M3/84A FAQ
1.How can I place an order for SMP20-M3/84A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMP20-M3/84A 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 SMP20-M3/84A reliable?
The price and inventory of SMP20-M3/84A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMP20-M3/84A is usually 5 days.
3.What payment methods are accepted for SMP20-M3/84A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMP20-M3/84A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMP20-M3/84A?
SMP20-M3/84A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMP20-M3/84A 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 SMP20-M3/84A?
For technical support, including SMP20-M3/84A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMP20-M3/84A requirements.
6.How does Aetrix verify that SMP20-M3/84A is sourced from the original manufacturer or authorized distributors?
All SMP20-M3/84A 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 SMP20-M3/84A meets industry standards.
7.What is the process for return or replacement of SMP20-M3/84A?
All SMP20-M3/84A units undergo pre-shipment inspection (PSI). If there is an issue with SMP20-M3/84A, 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 SMP20-M3/84A part is unused and in its original packaging.
Return procedure for SMP20-M3/84A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMP20-M3/84A Tags
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