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onsemi SMF6.0AT1
- Part No.:
- SMF6.0AT1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SOD-123F
- Datasheet:
-
SMF6.0AT1.pdf
- Description:
- TVS DIODE 6VWM 10.3VC SOD123FL
- Quantity:
- Payment:
- Shipping:
Inventory:3,530
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Product details
Overview
SMF6.0AT1 from onsemi is a unidirectional transient voltage suppressor (TVS) diode designed for overvoltage protection in low-voltage DC circuits. It features a 6.0 V working peak reverse voltage (VRWM), 10.3 V maximum clamping voltage at 19.4 A peak pulse current, and 200 W peak pulse power rating per 10/1000 µs waveform - ideal for safeguarding USB ports, microcontroller I/O lines, and low-voltage power rails against ESD and surge events.
For engineers reviewing the SMF6.0AT1 datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 19.4 A surge, sub-1 ns response time, IEC61000-4-2 Level 4 (±16 kV HBM) ESD robustness, and SOD−123FL package compatibility with high-density portable PCB layouts.
Technical Context
The SMF6.0AT1 operates as a Zener-based unidirectional TVS, conducting only during reverse overvoltage transients above its breakdown threshold (6.67–7.37 V at 10 mA). Its low zener impedance and fast <1 ns response enable effective suppression of fast-rising ESD pulses before downstream ICs are damaged.
Thermally, it uses a SOD−123FL package with 26 °C/W junction-to-cathode thermal resistance and is rated for −55 °C to +150 °C operation. It delivers 200 W peak power (10/1000 µs) and 1000 W peak power (8/20 µs) when mounted on recommended FR-4 pads, with derating applied above 25 °C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 6.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 6.67 V / 7.37 V @ 10 mA - Ensures reliable turn-on margin above nominal supply |
| VC @ IPP | 10.3 V @ 19.4 A - Clamped voltage seen by protected circuit during worst-case surge |
| IPP | 19.4 A - Peak surge current capability under standard 10/1000 µs waveform |
| Response Time | < 1 ns - Fast enough to suppress ESD events before logic-level damage occurs |
| ESD Rating | ±16 kV HBM (Class 3), IEC61000-4-2 Level 4 - Validated for end-equipment compliance testing |
| Package | SOD−123FL - Low-profile (1.0 mm max height), 8.45 mm² footprint, MSL 1, 260 °C reflow compatible |
Pinout & Package
SOD−123FL surface-mount package with cathode indicated by polarity band; 2-terminal unidirectional configuration; 1.5–1.8 mm width, 2.5–2.9 mm length, 0.7–1.1 mm lead width, and 3.4–3.8 mm overall length. Mounting position is unrestricted; qualified for lead-free reflow up to 260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to system ground or low-impedance return path; carries full surge current during clamping |
| 2 (Non-banded End) | Anode | Connected to protected line (e.g., USB D+, I/O pin); reverse-biased during normal operation |
Key Features
| Feature | Design Value |
|---|---|
| Low Clamping Ratio | VC/VRWM = 1.72 - Minimizes voltage overshoot on protected 5 V or 3.3 V rails |
| Ultra-Fast Response | < 1 ns - Captures ESD transients before propagation into sensitive CMOS inputs |
| High Surge Robustness | 200 W (10/1000 µs), 1000 W (8/20 µs) - Withstands multiple industrial surge events without degradation |
| Small-Signal Compatibility | IR ≤ 400 µA @ 6.0 V - Negligible leakage impact on battery-powered sensor nodes or sleep-mode circuits |
| Automated Assembly Ready | SOD−123FL tape-and-reel (3000/reel), matte Sn finish, MSL 1 - Supports high-yield SMT production without baking |
Applications
| USB 2.0 Data Line Protection | Microcontroller GPIO Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines in portable USB peripherals against contact ESD and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS placed between signal line and ground, clamping transients before they reach the USB transceiver PHY. Use Value: Maintains signal integrity with <10.3 V clamping while meeting IEC61000-4-2 Level 4 (±16 kV) compliance without adding capacitance that degrades 480 Mbps eye diagram. | Use Scenario: Safeguarding 3.3 V or 5 V microcontroller I/O pins exposed to user interfaces, buttons, or external sensors. IC Role / Device Role / Timing Role: Standoff voltage matched to MCU VDD (6.0 V VRWM), placed directly at pin entry point with minimal trace inductance. Use Value: Prevents latch-up or gate oxide damage from ±8 kV contact ESD by limiting pin voltage to ≤10.3 V within <1 ns - preserving firmware reliability in field-deployed devices. |
| DC Power Rail Clamp | Industrial Sensor Interface Protection |
Use Scenario: Suppressing load dump and inductive switching spikes on 5 V auxiliary power rails in automotive body control modules. IC Role / Device Role / Timing Role: Connected anode-to-rail, cathode-to-ground; absorbs 19.4 A surges without forward conduction during normal operation. Use Value: Limits rail overshoot to ≤10.3 V during 10/1000 µs transients, preventing brownout resets or regulator overvoltage shutdown in compact ECUs. | Use Scenario: Shielding analog front-end inputs (e.g., 4–20 mA loop receivers) from induced surges in factory floor wiring harnesses. IC Role / Device Role / Timing Role: Placed at connector entry, shunting transient energy to ground before reaching precision op-amps or ADC inputs. Use Value: Delivers 200 W surge handling with <400 µA leakage at 6 V - ensuring no offset drift in µV-level measurement paths during standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.0A | Same VRWM (6.0 V) and VC (10.3 V), but SMA package (higher RθJA = 40°C/W, larger footprint) | Less suitable for ultra-compact layouts; better thermal dissipation in open-air environments | Choose SMAJ6.0A if board space allows and higher steady-state power handling is needed |
| P6SMB6.0A | Higher Ppk (600 W), same VRWM/VC, but SMB package (3.5 mm × 4.6 mm vs. SOD−123FL's 2.7 mm × 1.7 mm) | Preferred for industrial power supplies where surge repetition rate is high and layout density is less constrained | Choose P6SMB6.0A when 600 W single-pulse rating is required and 2× footprint increase is acceptable |
Compared with SMAJ6.0A and P6SMB6.0A, the SMF6.0AT1 provides identical electrical protection performance in a 60% smaller footprint and 30% lower profile - making it optimal for space-constrained portable electronics where PCB real estate and component height are critical constraints.
Availability
SMF6.0AT1 is available at Aetrix Electronics and suitable for USB interface protection, microcontroller I/O hardening, and low-voltage DC rail clamping requiring stable component supply across high-mix, low-volume production runs and rapid prototyping cycles.
Supply support for SMF6.0AT1 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The SMF5.0AT1 Series belongs to onsemi's transient voltage suppressor portfolio, engineered specifically for high-surge-capability, low-leakage, ultra-fast clamping in space-constrained consumer and portable electronics.
FAQ
What is the clamping voltage of the SMF6.0AT1 under maximum surge conditions?
The SMF6.0AT1 has a maximum clamping voltage (VC) of 10.3 V when subjected to its rated peak pulse current of 19.4 A under the standard 10/1000 µs waveform. This value is guaranteed across temperature and process variation per the official onsemi datasheet, and defines the highest voltage the protected circuit will experience during a worst-case transient event. The SMF6.0AT1 maintains this clamping performance consistently due to its low dynamic impedance and Zener-based structure.
Is the SMF6.0AT1 suitable for protecting 3.3 V logic interfaces?
Yes, the SMF6.0AT1 is commonly used for 3.3 V logic protection because its 6.0 V VRWM provides sufficient margin above the 3.3 V rail while keeping clamping voltage (10.3 V) well below typical absolute maximum ratings of modern I/O cells. Its <400 µA leakage at 6.0 V avoids loading effects, and its <1 ns response ensures ESD transients are suppressed before damaging gate oxides. The SMF6.0AT1 is widely deployed in this role across portable MCU designs.
Does the SMF6.0AT1 meet IEC61000-4-2 and IEC61000-4-4 standards?
Yes, the SMF6.0AT1 is rated for Class 3 ESD per Human Body Model (>16 kV) and explicitly validated for IEC61000-4-2 Level 4 (±8 kV contact, ±15 kV air) and IEC61000-4-4 (40 A, 5/50 ns) surge immunity. These ratings are confirmed in the onsemi SMF5.0AT1 Series datasheet Rev. 0 and reflect tested performance - not theoretical capability. The SMF6.0AT1 achieves this through optimized junction design and low-inductance SOD−123FL packaging.
What is the thermal resistance and power derating behavior of the SMF6.0AT1?
The SMF6.0AT1 has a junction-to-cathode thermal resistance (RθJcathode) of 26 °C/W and a junction-to-ambient resistance (RθJA) of 325 °C/W when mounted on the recommended minimum pad size. Its DC power dissipation is 385 mW at 25 °C ambient, derating linearly to zero at 150 °C. Pulse power (200 W) is specified at TA = 25 °C and must be reduced per the derating curve in Figure 4 of the SMF5.0AT1 datasheet. This thermal profile is integral to the SMF6.0AT1's reliability in sustained surge environments.
Can the SMF6.0AT1 be used in bidirectional configurations?
No, the SMF6.0AT1 is a unidirectional TVS diode and must be used with correct polarity: anode to the protected line, cathode to ground. It does not conduct in forward bias beyond ~1.25 V, so it cannot clamp positive transients on grounded lines or negative excursions on VCC-connected nodes. For bidirectional protection, two SMF6.0AT1 devices in series opposition or a dedicated bidirectional part like SMBJ6.0CA would be required - the SMF6.0AT1 itself supports only single-quadrant clamping.
SMF6.0AT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- SOD-123F
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6V
- Voltage - Breakdown (Min):
- 6.67V
- Voltage - Clamping (Max) @ Ipp:
- 10.3V
- Current - Peak Pulse (10/1000µs):
- 19.4A
- Power - Peak Pulse:
- 200W
- 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:
- SOD-123FL
SMF6.0AT1 FAQ
1.How can I place an order for SMF6.0AT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF6.0AT1 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 SMF6.0AT1 reliable?
The price and inventory of SMF6.0AT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF6.0AT1 is usually 5 days.
3.What payment methods are accepted for SMF6.0AT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF6.0AT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF6.0AT1?
SMF6.0AT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF6.0AT1 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 SMF6.0AT1?
For technical support, including SMF6.0AT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF6.0AT1 requirements.
6.How does Aetrix verify that SMF6.0AT1 is sourced from the original manufacturer or authorized distributors?
All SMF6.0AT1 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 SMF6.0AT1 meets industry standards.
7.What is the process for return or replacement of SMF6.0AT1?
All SMF6.0AT1 units undergo pre-shipment inspection (PSI). If there is an issue with SMF6.0AT1, 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 SMF6.0AT1 part is unused and in its original packaging.
Return procedure for SMF6.0AT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF6.0AT1 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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