My Inquiry
My Account
onsemi SMF17AT1G
- Part No.:
- SMF17AT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- -
- Datasheet:
-
SMF17AT1G.pdf
- Description:
- TVS ZENER 200W 17V SOD123FL
- Quantity:
- Payment:
- Shipping:
Inventory:3,875
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMF17AT1G from onsemi is a unidirectional transient voltage suppressor (TVS) diode in SOD-123FL package, designed for clamping ESD and surge transients in low-voltage DC lines. It features 17 V working peak reverse voltage (VRWM), 19.9 V maximum clamping voltage (VC) at 10.1 A peak pulse current (IPP), and <1 ns response time. It is used in USB ports, HDMI interfaces, and portable power rails to protect microcontrollers and level-shifters.
For engineers reviewing the SMF17AT1G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM matching system operating voltage, VC margin relative to IC absolute maximum ratings, IEC 61000-4-2/4-4 compliance, and SOD-123FL footprint compatibility with space-constrained PCB layouts.
Technical Context
The SMF17AT1G operates as a Zener-based unidirectional TVS, conducting only during reverse overvoltage events above its breakdown threshold (VBR = 18.9–20.0 V). Its low zener impedance and fast junction response enable sub-nanosecond clamping of ESD pulses per IEC 61000-4-2 Level 4 (8 kV contact) and EFT bursts per IEC 61000-4-4 (40 A).
Thermal design relies on its 26 °C/W junction-to-cathode thermal resistance and MSL 1 reflow rating (260 °C peak). The device is Pb-free, RoHS-compliant, and qualified to AEC-Q101 when ordered with SZ prefix-though SMF17AT1G itself is industrial-grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 17 V - must be ≥ nominal DC line voltage (e.g., 15 V rail) to avoid leakage conduction during normal operation |
| VBR @ IT=1 mA | 18.9–20.0 V - defines minimum reverse breakdown onset; ensures reliable triggering before downstream IC damage |
| VC @ IPP=10.1 A | 19.9 V max - clamping voltage seen by protected IC under 10/1000 µs surge; determines safe voltage margin vs. IC abs max rating |
| IPP | 10.1 A - peak surge current capability at 10/1000 µs waveform; defines protection level against IEC 61000-4-5 surges |
| IR @ VRWM | 1 µA max - ultra-low reverse leakage preserves battery life and signal integrity in always-on circuits |
| Response Time | <1 ns - enables effective suppression of ESD events before propagation into sensitive analog/digital circuitry |
| ESD Rating | 16 kV HBM / 8 kV IEC 61000-4-2 contact - meets industrial and consumer end-equipment immunity requirements |
Pinout & Package
SOD-123FL surface-mount package: 2.7 mm × 1.65 mm footprint, 1.0 mm max height, cathode indicated by polarity band. Compatible with standard reflow profiles (MSL 1, 260 °C peak).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Transient clamp output | Connected to protected line; sinks surge current to ground when VRWM exceeded |
| 2 (Anode) | Reference node | Tied to system ground or lowest potential reference; completes clamping path during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD-123FL | 1.0 mm max height enables use in ultrathin mobile devices and stacked PCB assemblies |
| 200 W peak pulse power | Supports robust protection against repetitive 10/1000 µs transients without degradation |
| 8.45 mm² footprint | Minimizes PCB area while maintaining thermal performance via optimized copper pad layout |
| Pb-free & RoHS compliant | Meets global environmental regulations and eliminates lead contamination risk in assembly and recycling |
| Cathode polarity marking | Visible band ensures correct orientation during automated placement and manual inspection |
Applications
| USB 2.0 Data Lines | HDMI Hot-Plug Detection |
|---|---|
Use Scenario: Protecting D+ and D− lines in portable USB hosts and peripherals against ESD during cable insertion/removal. IC Role / Device Role: Unidirectional TVS clamping transient energy before it reaches USB transceiver ICs (e.g., TUSB2036). Use Value: Prevents latch-up or permanent damage to PHY inputs while maintaining signal integrity up to 480 Mbps. | Use Scenario: Safeguarding HDMI HPD (Hot Plug Detect) and DDC lines against contact ESD in AV receivers and monitors. IC Role / Device Role: Fast-clamping diode placed between HPD pin and +5 V supply to limit voltage excursion during plug/unplug events. Use Value: Ensures reliable hot-plug detection without false disconnects or I²C bus corruption on DDC lines. |
| Industrial Sensor Power Rails | Automotive Body Control Modules |
Use Scenario: Shielding 12–24 V sensor supply inputs (e.g., pressure, temperature sensors) from load-dump and ISO 7637-2 transients. IC Role / Device Role: Primary overvoltage clamp on input rail upstream of LDO regulators and ADC front-ends. Use Value: Maintains stable bias for precision analog circuits during automotive-grade surge events without requiring oversized capacitors. | Use Scenario: Protecting LIN bus transceivers and microcontroller I/O pins in door modules and seat controllers. IC Role / Device Role: Secondary-level TVS on LIN data line and VCC pins to absorb coupled transients from motor actuation noise. Use Value: Enables robust communication under harsh EMC conditions while meeting OEM-specific AEC-Q100 stress test requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SZSMF17AT1G | AEC-Q101 qualified; identical electrical specs but with automotive traceability, PPAP support, and controlled change management | Required for automotive ECUs; not necessary for industrial or consumer designs | Select SZSMF17AT1G only when automotive qualification and supply chain controls are mandated |
| SMAJ17A | Larger SMA package (4.5 × 2.7 mm); 400 W peak power; higher VC (27.6 V) and lower IR (1 µA same) | Better for high-energy surges but incompatible with tight SOD-123FL layouts | Choose SMAJ17A only if board space allows and surge immunity exceeds 200 W requirement |
Compared with SZSMF17AT1G, SMF17AT1G offers identical protection performance at lower cost and simpler supply chain for non-automotive use; versus SMAJ17A, SMF17AT1G provides superior board-area efficiency and faster response but lower single-pulse energy handling.
Availability
SMF17AT1G is available at Aetrix Electronics and suitable for USB interface protection, HDMI hot-plug circuits, and industrial sensor power rails requiring stable component supply and rapid fulfillment.
Supply support for SMF17AT1G 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 specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The SMF Series TVS diodes are engineered for compact, high-reliability transient suppression in space-constrained, high-speed digital interfaces and low-voltage power domains.
FAQ
What is the working peak reverse voltage (VRWM) of SMF17AT1G?
The SMF17AT1G has a VRWM of 17 V, meaning it remains non-conductive under steady-state reverse voltages up to this level. This value is selected to match common 15 V or 16.5 V DC rails while providing margin against ripple and tolerance drift. Exceeding VRWM risks premature conduction and increased leakage, so proper system voltage alignment is critical during SMF17AT1G integration.
How does SMF17AT1G differ from bidirectional TVS diodes?
SMF17AT1G is unidirectional and functions only during reverse overvoltage events-its anode must be tied to ground or the lowest potential node. Bidirectional variants (e.g., SMBJ17CA) conduct symmetrically for AC-coupled lines like RS-485. Using SMF17AT1G on bidirectional signals risks forward conduction and failure; always verify polarity and signal topology before selecting SMF17AT1G.
What is the maximum clamping voltage (VC) of SMF17AT1G under surge conditions?
The SMF17AT1G specifies a maximum clamping voltage (VC) of 19.9 V at 10.1 A peak pulse current (10/1000 µs waveform). This value represents the worst-case voltage imposed on the protected circuit during a defined surge event. Designers must ensure downstream ICs have absolute maximum ratings exceeding 19.9 V to guarantee survivability when SMF17AT1G is active.
Is SMF17AT1G suitable for automotive applications?
Standard SMF17AT1G is rated for industrial temperature range (−55 °C to +150 °C) but lacks AEC-Q101 qualification. For automotive use, the SZSMF17AT1G variant is required-it adds PPAP documentation, lot traceability, and controlled process changes. Using SMF17AT1G in automotive systems may violate OEM compliance requirements, even if electrical specs appear sufficient.
What PCB layout practices optimize SMF17AT1G performance?
To maximize SMF17AT1G effectiveness, place it within 5 mm of the protected connector or IC pin, use short wide traces to ground (minimize inductance), and connect the cathode directly to a solid ground plane. Avoid vias in the clamping path. Follow onsemi's recommended SOD-123FL footprint (2.7 × 1.65 mm pads, 0.9 mm spacing) to ensure thermal reliability and solder joint integrity during SMF17AT1G reflow.
SMF17AT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- -
- Unidirectional Channels:
- -
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- -
- Voltage - Breakdown (Min):
- -
- Voltage - Clamping (Max) @ Ipp:
- -
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- -
- Power Line Protection:
- -
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SMF17AT1G FAQ
1.How can I place an order for SMF17AT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF17AT1G 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 SMF17AT1G reliable?
The price and inventory of SMF17AT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF17AT1G is usually 5 days.
3.What payment methods are accepted for SMF17AT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF17AT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF17AT1G?
SMF17AT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF17AT1G 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 SMF17AT1G?
For technical support, including SMF17AT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF17AT1G requirements.
6.How does Aetrix verify that SMF17AT1G is sourced from the original manufacturer or authorized distributors?
All SMF17AT1G 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 SMF17AT1G meets industry standards.
7.What is the process for return or replacement of SMF17AT1G?
All SMF17AT1G units undergo pre-shipment inspection (PSI). If there is an issue with SMF17AT1G, 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 SMF17AT1G part is unused and in its original packaging.
Return procedure for SMF17AT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF17AT1G 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
