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Vishay General Semiconductor - Diodes Division SMA6F20A-M3/6A
- Part No.:
- SMA6F20A-M3/6A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F20A-M3/6A.pdf
- Description:
- TVS DIODE 20VWM 36.8VC DO221AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,780
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Product details
Overview
SMA6F20A-M3/6A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SlimSMA (DO-221AC) package, designed for clamping voltage transients on power and signal lines. It features 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 31.4 V maximum clamping voltage (VC) at 19.1 A (10/1000 μs), 600 W peak pulse power, and ESD immunity per IEC 61000-4-2 level 4 (15 kV air / 8 kV contact).
For engineers reviewing the SMA6F20A-M3/6A datasheet, SMA6F20A-M3/6A pinout, SMA6F20A-M3/6A application, or SMA6F20A-M3/6A equivalent, this device is selected for robust overvoltage protection in space-constrained consumer, industrial, and telecom systems where low-profile mounting, automated placement compatibility, and high surge current handling are critical.
Technical Context
This TVS diode operates as a unidirectional Zener-based clamp, activating above its 20 V stand-off threshold to divert transient energy away from downstream ICs or MOSFETs. Its 31.4 V clamping voltage at 19.1 A ensures safe voltage limiting during 10/1000 μs surges, while dynamic resistance of 0.361 Ω supports fast response and low overshoot.
Thermal performance is defined by RθJA = 120–150 °C/W (FR4 PCB, 2 oz. copper) and junction temperature range of –55 °C to +175 °C. The M3 suffix confirms halogen-free, RoHS-compliant construction with matte tin-plated leads meeting J-STD-002 solderability and JESD201 class 2 whisker resistance.
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 at 1 mA - Ensures reliable turn-on margin above VWM with tight tolerance |
| VC @ IPPM | 31.4 V at 19.1 A (10/1000 μs) - Limits downstream voltage stress during common lightning/surge events |
| PPPM (10/1000 μs) | 600 W - Sustains standard industrial surge test profiles without failure |
| ESD Rating | IEC 61000-4-2 level 4: 15 kV air / 8 kV contact - Protects against human-body model discharges in end-user environments |
| Package | SlimSMA (DO-221AC) - 0.95 mm typical height enables ultra-thin PCB designs and automated pick-and-place |
| Operating TJ | –55 °C to +175 °C - Supports operation in harsh thermal environments including automotive under-hood and industrial motor drives |
Pinout & Package
Package: SlimSMA (DO-221AC), surface-mount, unidirectional configuration with cathode indicated by color band. Dimensions: 4.15–4.35 mm length × 2.50–2.70 mm width × 0.95 mm typical height. Complies with JEDEC DO-221AC outline and UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or transient clamping | Connected to protected line (e.g., VBUS or signal trace); forms low-impedance path to ground when clamped |
| Cathode | Current exit terminal; marked by color band | Connected to system ground or low-impedance return path; defines polarity-sensitive clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile height | 0.95 mm typical - Enables use in slim consumer devices and stacked PCB assemblies |
| Automated placement compatibility | Matte tin-plated leads meeting J-STD-002 - Ensures consistent solder joint formation in high-speed SMT lines |
| High-energy surge handling | 4 kW peak pulse power (8/20 μs) - Withstands telecom-grade lightning surges without degradation |
| Halogen-free & RoHS | M3 suffix - Meets environmental compliance requirements for global electronics manufacturing |
| MSL Level 1 | Reflow capable up to 260 °C peak - Eliminates pre-bake requirement for standard assembly processes |
Applications
| USB Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protects 5 V USB VBUS lines from inductive switching spikes and hot-plug transients in portable docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to clamp overvoltage before it reaches USB controller or power switch. Use Value: 31.4 V clamping ensures USB 2.0/3.0 PHY and PMIC remain within absolute maximum ratings during 19.1 A surges. |
Use Scenario: Shields analog output lines (e.g., 4–20 mA or 0–10 V) of pressure/temperature sensors from EFT and surge coupling in factory automation. IC Role / Device Role / Timing Role: Standoff-rated TVS on sensor output traces to suppress transients induced by nearby relay switching or motor drives. Use Value: 20 V VWM allows full signal swing while 0.361 Ω dynamic resistance minimizes clamping delay and overshoot. |
| Telecom DSL Line Interface | Consumer Audio Amplifier Input Stage |
Use Scenario: Installed on DSL line interface circuits to absorb lightning-induced surges entering via telephone wiring in residential gateways. IC Role / Device Role / Timing Role: Primary front-end TVS on tip/ring lines, coordinated with gas discharge tubes and series impedance for multi-stage protection. Use Value: 4 kW (8/20 μs) rating meets ITU-T K.21 basic protection level for outdoor-exposed telecom equipment. |
Use Scenario: Placed across differential audio input pins of Class D amplifiers to prevent pop/noise and latch-up from ESD events during user handling. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp referenced to local ground, guarding sensitive op-amp inputs. Use Value: IEC 61000-4-2 level 4 rating (8 kV contact) prevents damage during routine service and end-user interaction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F20A-M3/H | Different tape-and-reel packaging (7" reel, code H vs. 6A); identical electrical specs and SlimSMA package | No functional difference - used interchangeably where reel size or base quantity (3500 vs. 3500) aligns with production planning | Select SMA6F20A-M3/H only if 7" reel logistics or existing M3/H inventory stream simplifies procurement |
| SMAJ20A-M3/6A | Higher 400 W PPPM (10/1000 μs), larger SMA (DO-214AC) package (2.3 mm height), same VWM/VBR/VC ratings | Less suitable for ultra-low-profile designs but offers higher thermal mass for repeated surge duty cycles | Choose SMAJ20A-M3/6A when board height > 0.95 mm is acceptable and enhanced thermal endurance is required |
Compared with SMA6F20A-M3/6A, SMA6F20A-M3/H provides identical protection in alternate packaging, while SMAJ20A-M3/6A trades compactness for greater surge energy absorption - enabling selection based on mechanical constraints versus thermal cycling demands.
Availability
SMA6F20A-M3/6A is available at Aetrix Electronics and suitable for USB power delivery, industrial sensor interfaces, telecom line protection, and consumer audio input stages requiring stable component supply, consistent M3-compliant sourcing, and SlimSMA footprint compatibility.
Supply support for SMA6F20A-M3/6A 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, efficiency, and application-specific performance.
The SMA6FxxA family is engineered for high-density, automated PCB assembly in cost-sensitive consumer and industrial systems where low-profile TVS protection with certified ESD robustness is essential.
FAQ
What is the clamping voltage of the SMA6F20A-M3/6A under a 10/1000 μs surge?
The SMA6F20A-M3/6A exhibits a maximum clamping voltage (VC) of 31.4 V at 19.1 A under a 10/1000 μs waveform. This value is measured per standard test conditions and ensures downstream components remain within safe operating limits during common industrial surge events. The SMA6F20A-M3/6A achieves this with a dynamic resistance of 0.361 Ω, contributing to predictable voltage limiting behavior.
Is the SMA6F20A-M3/6A suitable for bidirectional transient protection?
No, the SMA6F20A-M3/6A is a unidirectional TVS diode, intended only for DC or single-polarity signal line protection. Its design relies on forward conduction from anode to cathode during overvoltage events, and it does not suppress negative-going transients. For bidirectional protection, a dedicated bidirectional variant such as SMA6F20CA-M3/6A must be used instead of the SMA6F20A-M3/6A.
What does the "M3/6A" suffix indicate in SMA6F20A-M3/6A?
The "M3" suffix denotes halogen-free, RoHS-compliant, industrial-grade construction with matte tin-plated leads qualified to JESD201 class 2 whisker resistance. The "6A" identifies the preferred package code for SMA6F5.0A through SMA6F20A variants and specifies a 7-inch diameter plastic tape-and-reel delivery format containing 3500 units. Both elements are integral to the SMA6F20A-M3/6A ordering identity.
Can the SMA6F20A-M3/6A be used in automotive applications?
The SMA6F20A-M3/6A operates across –55 °C to +175 °C junction temperature and meets MSL Level 1 reflow requirements, making it technically viable for under-hood or cabin-located modules. However, it is not AEC-Q200 qualified. For automotive production, the SMA6F20A-M3/6A should undergo full system-level validation; qualified alternatives like the AEC-Q200-compliant SMA6F20AHE3/61T must be considered for certified deployments.
How does the SlimSMA (DO-221AC) package of the SMA6F20A-M3/6A compare to standard SMA (DO-214AC)?
The SlimSMA (DO-221AC) package of the SMA6F20A-M3/6A reduces height to 0.95 mm - nearly 60% lower than the 2.3 mm profile of standard SMA (DO-214AC). While both share similar footprint dimensions, the SlimSMA enables thinner end products and improves airflow in dense layouts. The SMA6F20A-M3/6A leverages this for space-constrained applications where the SMAJ20A-M3/6A's larger package would be prohibitive.
SMA6F20A-M3/6A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-221AC, SMA Flat Leads
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 36.8V
- Current - Peak Pulse (10/1000µs):
- 93A (8/20µs)
- Power - Peak Pulse:
- 4000W (4kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-221AC (SlimSMA)
SMA6F20A-M3/6A FAQ
1.How can I place an order for SMA6F20A-M3/6A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F20A-M3/6A 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 SMA6F20A-M3/6A reliable?
The price and inventory of SMA6F20A-M3/6A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F20A-M3/6A is usually 5 days.
3.What payment methods are accepted for SMA6F20A-M3/6A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F20A-M3/6A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F20A-M3/6A?
SMA6F20A-M3/6A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F20A-M3/6A 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 SMA6F20A-M3/6A?
For technical support, including SMA6F20A-M3/6A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F20A-M3/6A requirements.
6.How does Aetrix verify that SMA6F20A-M3/6A is sourced from the original manufacturer or authorized distributors?
All SMA6F20A-M3/6A 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 SMA6F20A-M3/6A meets industry standards.
7.What is the process for return or replacement of SMA6F20A-M3/6A?
All SMA6F20A-M3/6A units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F20A-M3/6A, 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 SMA6F20A-M3/6A part is unused and in its original packaging.
Return procedure for SMA6F20A-M3/6A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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