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Vishay General Semiconductor - Diodes Division SMA6F120A-M3/I
- Part No.:
- SMA6F120A-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F120A-M3/I.pdf
- Description:
- 600W,120V 5%,UNIDIR,SLIM SMA TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,961
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Product details
Overview
SMA6F120A-M3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) in SlimSMA (DO-221AC) package, designed for clamping voltage transients on power and signal lines. It features 120 V stand-off voltage (VWM), 133–147 V breakdown voltage (VBR) at 1 mA, 194 V maximum clamping voltage (VC) at 15.2 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 SMA6F120A-M3/I datasheet, SMA6F120A-M3/I pinout, SMA6F120A-M3/I application, or SMA6F120A-M3/I equivalent, this device is selected for robust overvoltage protection in DC power rails, sensor interfaces, and industrial communication ports where low-profile mounting, high surge capability, and halogen-free RoHS-compliant construction are required.
Technical Context
This TVS diode operates as a unidirectional Zener-based clamp, triggered when reverse voltage exceeds VBR, diverting transient current to ground while limiting VC across protected circuitry. Its 194 V clamping voltage at 15.2 A (10/1000 μs) ensures safe voltage exposure for downstream ICs rated ≤ 200 V.
Thermal performance is defined by RθJA = 120–150 °C/W (FR4 PCB, 2 oz.), junction temperature range of –55 °C to +175 °C, and MSL level 1 moisture sensitivity. The device uses matte tin-plated leads compliant with J-STD-002 and JESD22-B102, with cathode indicated by color band.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 133 V / 147 V at 1 mA - Ensures reliable turn-on above nominal rail voltage with margin |
| VC @ IPP | 194 V at 15.2 A (10/1000 μs) - Limits voltage seen by protected IC during 600 W surge |
| PPPM | 600 W (10/1000 μs), 4000 W (8/20 μs) - Supports both long-duration and fast-rising lightning-induced surges |
| ID @ VWM | ≤ 0.2 μA - Negligible leakage at rated stand-off, critical for low-power sensor bias networks |
| TJ max. | +175 °C - Enables use in under-hood automotive or high-ambient industrial environments |
| ESD Rating | IEC 61000-4-2 level 4: 15 kV (air), 8 kV (contact) - Meets system-level ESD immunity requirements |
Pinout & Package
Package: SlimSMA (DO-221AC), ultra-low profile (0.95 mm typical height), halogen-free, RoHS-compliant, MSL level 1, matte tin-plated leads. Cathode denoted by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink | Connected to protected line; conducts surge current toward ground path during overvoltage event |
| Cathode | Reference node | Connected to system ground; establishes clamping reference and defines unidirectional polarity |
Key Features
| Feature | Design Value |
|---|---|
| Very low profile (0.95 mm) | Enables placement in space-constrained modules such as IoT edge sensors and portable industrial gateways |
| 600 W (10/1000 μs) peak pulse power | Provides robust protection against inductive switching transients in 24–48 V DC control systems |
| IEC 61000-4-2 level 4 ESD rating | Eliminates need for additional discrete ESD components on exposed USB, RS-485, or analog sensor inputs |
| MSL level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without moisture-related popcorning risk |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills environmental compliance for global industrial and telecom equipment certifications |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protecting 24 V digital input channels in programmable logic controllers from relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input terminal and microcontroller GPIO, absorbing >1 kV transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to isolation amplifiers and input buffers, maintaining functional safety integrity per IEC 61000-4-4. | Use Scenario: Safeguarding LIN bus transceiver pins and sensor supply lines in body electronics against load dump and jump-start events. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between LIN line and chassis ground, clamping spikes up to 194 V before transceiver threshold is exceeded. Use Value: Maintains bus communication continuity during ISO 7637-2 pulse 1/2a/5a stress, avoiding false resets or data corruption. |
| Telecom Power Supply Input | Smart Meter Sensor Interface |
Use Scenario: Front-end protection of AC/DC converter primary-side DC bus against lightning-induced surges entering via mains input. IC Role / Device Role / Timing Role: Primary-stage TVS placed across bulk capacitor, conducting 4 kW (8/20 μs) surges to ground before upstream fuse opens. Use Value: Extends mean time between failures (MTBF) of power supplies in outdoor telecom cabinets by suppressing >6 kV line-to-ground transients. | Use Scenario: Shielding precision analog front-ends (e.g., current shunt monitors, temperature ADCs) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (≤0.2 μA) TVS mounted directly at connector entry point, minimizing parasitic inductance before protected signal path. Use Value: Preserves measurement accuracy by preventing ESD-induced offset drift or temporary saturation in 24-bit delta-sigma ADCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6F120A-M3/6B | Same electrical specs; differs only in tape-and-reel packaging (14,000 pcs/reel, 13″ diameter vs. I-suffix's 14,000 pcs/reel, 13″ diameter - identical quantity and reel size) | No functional difference; both meet same M3 halogen-free, RoHS, and MSL level 1 requirements | Select SMA6F120A-M3/I when sourcing from distributors using standard I-suffix reel coding; verify reel diameter compatibility with pick-and-place feeders. |
| SMAJ120A-M3/5B | Same VWM (120 V), but lower PPPM (400 W vs. 600 W), higher VC (200 V vs. 194 V), and larger SMA (DO-214AC) package (2.3 mm height vs. 0.95 mm) | Less suitable for ultra-thin designs; lower surge rating limits use in high-energy industrial environments | Choose SMA6F120A-M3/I over SMAJ120A-M3/5B when board height < 1.1 mm is mandatory or 600 W surge handling is required. |
Compared with SMA6F120A-M3/6B, the SMA6F120A-M3/I offers identical protection performance and compliance, differing only in internal distributor packaging code; versus SMAJ120A-M3/5B, it delivers 50 % higher surge power rating and 30 % lower profile-critical for next-generation compact power converters and sensor nodes.
Availability
SMA6F120A-M3/I is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and telecom power supply applications requiring stable component supply, halogen-free compliance, and MSL level 1 reflow readiness.
Supply support for SMA6F120A-M3/I 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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMA6F series is part of Vishay's TRANSZORB® TVS portfolio, engineered for high-energy transient suppression in space-constrained, high-reliability DC power and signal line applications across industrial, automotive, and communications markets.
FAQ
What is the clamping voltage of the SMA6F120A-M3/I under a 10/1000 μs surge?
The SMA6F120A-M3/I has a maximum clamping voltage (VC) of 194 V at 15.2 A under a 10/1000 μs waveform. This value is measured per standardized test conditions and ensures protected circuits experience no more than 194 V during such transients. The SMA6F120A-M3/I achieves this clamping performance while maintaining low dynamic resistance (3.1 Ω) and tight VBR tolerance (133–147 V), making it suitable for safeguarding 150 V-rated components.
Is the SMA6F120A-M3/I unidirectional or bidirectional?
The SMA6F120A-M3/I is a unidirectional transient voltage suppressor, meaning it clamps only in reverse-bias mode and conducts forward current like a standard diode. Its polarity is marked by a cathode band, and it must be installed with anode toward the protected line and cathode toward ground. The SMA6F120A-M3/I is not rated for bidirectional operation; using it in AC-coupled or dual-polarity signal paths requires external design considerations.
Does the SMA6F120A-M3/I meet automotive-grade reliability standards?
The SMA6F120A-M3/I meets AEC-Q200 stress test requirements for passive components when qualified per Vishay's automotive product release process. While the base datasheet specifies industrial-grade qualification (MSL level 1, TJ max. +175 °C, JESD22-A108 temperature cycling), automotive use requires validation against AEC-Q200 Rev D. The SMA6F120A-M3/I's construction-including matte tin plating, halogen-free molding compound, and DO-221AC mechanical robustness-supports automotive deployment in BCM and body electronics when sourced under Vishay's automotive traceability program.
What is the leakage current specification for the SMA6F120A-M3/I at its stand-off voltage?
At its 120 V stand-off voltage (VWM), the SMA6F120A-M3/I exhibits a maximum reverse leakage current (ID) of 0.2 μA at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor bias networks and minimizes standby power loss in battery-operated equipment. The SMA6F120A-M3/I maintains this specification across its full operating temperature range (–55 °C to +175 °C), with leakage increasing predictably per thermal coefficient data in the Vishay datasheet.
Can the SMA6F120A-M3/I be used in place of SMAJ120A-M3/5B?
The SMA6F120A-M3/I is not a direct drop-in replacement for SMAJ120A-M3/5B due to differences in package height (0.95 mm vs. 2.3 mm), thermal resistance (RθJA 120–150 °C/W vs. ~100 °C/W), and peak pulse power (600 W vs. 400 W). While both share 120 V VWM and unidirectional function, the SMA6F120A-M3/I's SlimSMA footprint requires updated land pattern and stencil design. Use SMA6F120A-M3/I only when low-profile mounting and higher surge rating are prioritized over legacy SMA compatibility.
SMA6F120A-M3/I 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):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 194V
- Current - Peak Pulse (10/1000µs):
- 3.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-221AC (SlimSMA)
SMA6F120A-M3/I FAQ
1.How can I place an order for SMA6F120A-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F120A-M3/I 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 SMA6F120A-M3/I reliable?
The price and inventory of SMA6F120A-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6F120A-M3/I is usually 5 days.
3.What payment methods are accepted for SMA6F120A-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F120A-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F120A-M3/I?
SMA6F120A-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F120A-M3/I 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 SMA6F120A-M3/I?
For technical support, including SMA6F120A-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F120A-M3/I requirements.
6.How does Aetrix verify that SMA6F120A-M3/I is sourced from the original manufacturer or authorized distributors?
All SMA6F120A-M3/I 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 SMA6F120A-M3/I meets industry standards.
7.What is the process for return or replacement of SMA6F120A-M3/I?
All SMA6F120A-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F120A-M3/I, 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 SMA6F120A-M3/I part is unused and in its original packaging.
Return procedure for SMA6F120A-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F120A-M3/I Tags
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