My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMA6F120A-M3/H
- Part No.:
- SMA6F120A-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-221AC, SMA Flat Leads
- Datasheet:
-
SMA6F120A-M3/H.pdf
- Description:
- 600W,120V 5%,UNIDIR,SLIM SMA TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,321
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMA6F120A-M3/H 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). It protects MOSFETs and ICs in industrial power supplies.
For engineers reviewing the SMA6F120A-M3/H datasheet, SMA6F120A-M3/H pinout, SMA6F120A-M3/H application, or SMA6F120A-M3/H equivalent, key selection criteria include clamping voltage margin relative to protected circuit's max operating voltage, thermal derating above 25 °C ambient, unidirectional polarity alignment with DC bias, and SlimSMA footprint compatibility with automated SMT assembly.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (≤0.2 μA leakage at 120 V), but conducts heavily when transient voltage exceeds VBR, limiting downstream voltage to ≤194 V at 15.2 A (10/1000 μs). Its low dynamic resistance (3.1 Ω) ensures rapid response and minimal overshoot during surge events.
The device uses a planar junction Zener structure optimized for fast transient suppression, with junction temperature range from –55 °C to +175 °C and thermal resistance RθJA of 120–150 °C/W on FR4 PCB. It meets J-STD-020 MSL level 1 and JESD201 class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - Maximum continuous reverse operating voltage before significant leakage begins; sets upper limit for protected line's steady-state DC voltage. |
| VBR (min/max) | 133 V / 147 V at 1 mA - Breakdown onset range; defines minimum overvoltage threshold that triggers clamping action. |
| VC @ IPPM | 194 V at 15.2 A (10/1000 μs) - Maximum clamped voltage seen by downstream circuit during standardized surge; must be below protected IC's absolute max rating. |
| PPPM (10/1000 μs) | 600 W - Peak surge energy handling capability under standard lightning-surge waveform; determines survivability of common industrial transients. |
| ID @ VWM | ≤0.2 μA - Reverse leakage current at rated stand-off voltage; negligible power loss and no measurable loading on 120 V DC bus. |
| TJ max. | +175 °C - Maximum junction temperature; enables reliable operation in high-ambient environments such as enclosed industrial enclosures or near heat sources. |
| ESD Rating | IEC 61000-4-2 level 4: 15 kV air / 8 kV contact - Confirmed electrostatic discharge immunity for front-panel interfaces and exposed connectors. |
Pinout & Package
Package: SlimSMA (DO-221AC), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Dimensions: 4.15–4.35 mm length × 2.50–2.70 mm width × 0.95 mm typical height. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes conduction path during transient clamp event. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 120 V DC rail); receives transient energy and initiates Zener avalanche when VBR exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| Clamping performance | 194 V max VC at 15.2 A (10/1000 μs) - Ensures protected 150 V-rated components remain within safe operating area during surge. |
| Low-profile packaging | 0.95 mm typical height - Enables use in space-constrained industrial modules and stacked PCB assemblies without mechanical interference. |
| Automated placement support | Slender SlimSMA outline with defined lead geometry - Compatible with standard pick-and-place equipment and reflow profiles (peak 260 °C). |
| High-temperature reliability | 175 °C max junction temperature and MSL level 1 rating - Supports long-term operation in sealed enclosures with limited airflow and thermal management. |
| ESD robustness | 15 kV air / 8 kV contact per IEC 61000-4-2 - Eliminates need for additional ESD protection on accessible ports in industrial HMI and sensor nodes. |
Applications
| Industrial Power Supply Protection | DC Motor Drive Control Lines |
|---|---|
|
Use Scenario: 120 V DC bus in programmable logic controller (PLC) power module subjected to inductive kickback from relay coils and solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bus input to clamp transients before they reach DC-DC converters and microcontroller power rails. Use Value: Limits transient voltage to ≤194 V, preserving integrity of 200 V-rated input capacitors and preventing latch-up in 3.3 V logic supervisors. |
Use Scenario: Signal lines driving gate drivers for 100 V MOSFET half-bridges in compact brushless DC motor controllers. IC Role / Device Role / Timing Role: TVS mounted at connector interface to suppress coupling from motor commutation noise and external ESD events. Use Value: Sub-1 ns response time and 3.1 Ω dynamic resistance prevent false triggering of gate drivers and maintain PWM timing fidelity. |
| Telecom Line Interface Protection | Industrial Sensor Signal Conditioning |
|
Use Scenario: 48–120 V DC-powered remote radio unit (RRU) backhaul interface exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC isolation stage, coordinated with gas discharge tube (GDT) for staged protection. Use Value: 600 W (10/1000 μs) rating handles multi-kA induced surges while maintaining low capacitance (<50 pF) to avoid signal distortion on control lines. |
Use Scenario: Analog output line (0–10 V / 4–20 mA) from pressure sensor in hydraulic control system subject to ground loop transients and ESD. IC Role / Device Role / Timing Role: TVS placed directly at sensor PCB edge connector to shunt fast transients before entering op-amp buffer and ADC input stage. Use Value: ≤0.2 μA leakage at 120 V ensures no measurable offset error in precision analog circuits; 8 kV contact ESD rating prevents field failures. |
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 code (6B = 14,000 pcs/reel, 13″ diameter) vs. H (3,500 pcs/reel, 7″ diameter). | No functional difference; suited for high-volume automated assembly where larger reels reduce changeover frequency. | Select SMA6F120A-M3/6B when optimizing for SMT line uptime and minimizing reel changes in mass production. |
| SMA6F110A-M3/H | Lower VWM (110 V) and VBR (122–135 V); clamps at 177 V (12.4 A, 10/1000 μs); same package and thermal specs. | Better fit for 100 V nominal systems where tighter clamping margin is required; less margin for 120 V rails. | Choose SMA6F120A-M3/H over SMA6F110A-M3/H when protecting circuits with 120 V ±10% tolerance or higher surge exposure risk. |
Compared with SMA6F110A-M3/H, SMA6F120A-M3/H provides 10 V higher stand-off headroom and 17 V higher clamping ceiling-critical for 120 V industrial buses where overvoltage tolerance must exceed nominal rating. SMA6F120A-M3/6B offers identical protection with logistics optimization for high-volume deployment.
Availability
SMA6F120A-M3/H is available at Aetrix Electronics and suitable for industrial power supply protection, DC motor drive control lines, telecom line interface protection, and industrial sensor signal conditioning requiring stable component supply and full traceability.
Supply support for SMA6F120A-M3/H 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 ruggedness, reliability, and high-volume manufacturability.
The SMA6F series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in industrial, automotive, and telecom infrastructure where long-term stability under thermal stress and surge repetition is mandatory.
FAQ
What is the maximum clamping voltage of the SMA6F120A-M3/H under a 10/1000 μs surge?
The SMA6F120A-M3/H has a maximum clamping voltage (VC) of 194 V when subjected to a 15.2 A peak pulse current with a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Document Number: 89458) and represents the highest voltage the protected circuit will experience during such a transient. The SMA6F120A-M3/H maintains this clamping performance across its specified operating temperature range.
Is the SMA6F120A-M3/H suitable for bidirectional transient protection?
No, the SMA6F120A-M3/H is a unidirectional TVS diode and is not suitable for bidirectional protection. It conducts only in reverse bias above VBR and blocks forward current like a standard diode. For AC or bipolar signal lines, a bidirectional variant such as SMA6F120CA-M3/H-or a pair of unidirectional devices in series opposition-must be used. The SMA6F120A-M3/H polarity is marked by a cathode band and must be oriented correctly relative to DC bias.
What is the thermal resistance of the SMA6F120A-M3/H on a standard FR4 PCB?
The SMA6F120A-M3/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on an FR4 PCB with 2 oz. copper and standard footprint, per JEDEC 51-2A. Maximum RθJA is 150 °C/W under the same conditions. This value is critical for calculating junction temperature rise under sustained power dissipation and must be applied with derating curves from Figure 5 of the Vishay datasheet for accurate thermal design of the SMA6F120A-M3/H.
Does the SMA6F120A-M3/H meet lead-free and RoHS compliance requirements?
Yes, the SMA6F120A-M3/H is halogen-free, RoHS-compliant, and qualified to JESD201 class 2 for tin whisker resistance. The "M3" suffix explicitly denotes industrial-grade, lead-free, and environmentally compliant construction. Its matte tin-plated leads are solderable per J-STD-002 and JESD22-B102, and the molding compound meets UL 94 V-0 flammability rating. These attributes are confirmed in the Vishay datasheet revision 17-Sep-2021 for the SMA6F120A-M3/H.
How does the leakage current of the SMA6F120A-M3/H affect precision analog circuits?
The SMA6F120A-M3/H exhibits ≤0.2 μA maximum reverse leakage current at its 120 V stand-off voltage (VWM), measured at 25 °C. This extremely low leakage introduces negligible error-typically <1 μV offset-in high-impedance analog signal paths such as 0–10 V sensor outputs or instrumentation amplifier inputs. Because leakage remains stable across temperature and voltage, the SMA6F120A-M3/H can be placed directly at analog interface connectors without degrading measurement accuracy or causing drift in the SMA6F120A-M3/H-protected circuit.
SMA6F120A-M3/H 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/H FAQ
1.How can I place an order for SMA6F120A-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6F120A-M3/H 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/H reliable?
The price and inventory of SMA6F120A-M3/H 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/H is usually 5 days.
3.What payment methods are accepted for SMA6F120A-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6F120A-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6F120A-M3/H?
SMA6F120A-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6F120A-M3/H 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/H?
For technical support, including SMA6F120A-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6F120A-M3/H requirements.
6.How does Aetrix verify that SMA6F120A-M3/H is sourced from the original manufacturer or authorized distributors?
All SMA6F120A-M3/H 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/H meets industry standards.
7.What is the process for return or replacement of SMA6F120A-M3/H?
All SMA6F120A-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMA6F120A-M3/H, 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/H part is unused and in its original packaging.
Return procedure for SMA6F120A-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6F120A-M3/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
