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onsemi SMF100AT1G
- Part No.:
- SMF100AT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SOD-123F
- Datasheet:
-
SMF100AT1G.pdf
- Description:
- TVS DIODE 100VWM 162VC SOD123FL
- Quantity:
- Payment:
- Shipping:
Inventory:5,659
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Product details
Overview
SMF100AT1G from onsemi is a unidirectional transient voltage suppressor (TVS) diode in SOD−123FL package, designed for overvoltage protection of sensitive electronics. It features a 100 V working peak reverse voltage (VRWM), 123 V maximum clamping voltage (VC) at 1.1 A peak pulse current (IPP), 200 W peak pulse power (10/1000 µs), <1 ns response time, and IEC61000−4−2 Level 4 ESD rating (>16 kV HBM). It is used in DC power rails of industrial power supplies and telecom interface circuits.
For engineers reviewing the SMF100AT1G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage margin relative to system operating voltage, surge current handling under IEC 61000-4-4 (40 A), thermal derating on FR-4 PCBs, and compatibility with automated SMT reflow at 260°C.
Technical Context
This TVS operates in avalanche breakdown mode during transients, providing low-impedance shunting above its VRWM of 100 V. Its zener-based structure ensures stable clamping up to 123 V at IPP = 1.1 A, with leakage current ≤1 µA at VRWM and forward voltage ≤1.25 V at 200 mA.
The device uses a thermoset plastic SOD−123FL package qualified to MSL 1, with 100% matte tin lead finish and 26 °C/W junction-to-cathode thermal resistance. It meets IEC61000−4−2 (±8 kV contact / ±15 kV air) and IEC61000−4−4 (40 A, 5/50 ns) immunity standards without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 100 V - Maximum continuous reverse operating voltage before clamping begins |
| VC @ IPP | 123 V @ 1.1 A - Peak clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| IPP Max | 1.1 A - Maximum non-repetitive peak pulse current the device can safely divert |
| Ppk | 200 W @ 10/1000 µs - Surge energy handling capability per standard waveform |
| Response Time | <1 ns - Enables protection of high-speed digital interfaces against fast ESD events |
| ESD Rating | >16 kV HBM - Meets Class 3 human body model requirements for handheld equipment |
| Leakage Current | ≤1 µA @ 100 V - Minimal standby power loss and signal integrity impact in always-on rails |
Pinout & Package
SOD−123FL surface-mount package: 2.5–2.9 mm length × 1.5–1.8 mm width × max 1.0 mm height; cathode indicated by polarity band; 100% matte Sn lead finish; MSL 1 rated; 260°C max reflow temperature.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to protected line (e.g., VBUS); conducts during positive transients when anode is grounded |
| 2 (Non-banded End) | Anode | Typically tied to ground or low-impedance return path; completes clamping loop during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD−123FL footprint | 8.45 mm² area and ≤1.0 mm height enables compact placement near connectors and IC power pins |
| IEC61000−4−4 compliance | Withstands 40 A surge (5/50 ns) without degradation-suitable for industrial Ethernet and RS-485 ports |
| Fast response <1 ns | Protects CMOS inputs and USB PHYs from sub-nanosecond ESD spikes before damage occurs |
| Stable clamping with low Zz | Zener impedance ensures VC remains tightly bounded across temperature and aging, critical for rail integrity |
| Tape-and-reel packaging | 3,000 units per 8 mm tape supports high-volume automated assembly without manual handling |
Applications
| Industrial Power Supply Input Protection | Telecom Interface Surge Suppression |
|---|---|
Use Scenario: 24–48 V DC input stage of DIN-rail mounted PLC power modules exposed to lightning-induced surges on field wiring. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp induced transients before they reach upstream DC/DC controllers. Use Value: 123 V clamping ensures MOSFET gate drivers and PWM ICs remain below absolute maximum ratings during 1 kV/500 A surge events. | Use Scenario: RS-485 transceiver lines in outdoor base station backhaul units subject to repeated ESD and EFT exposure. IC Role / Device Role / Timing Role: Line-side TVS on A/B differential pairs, referenced to signal ground, absorbing common-mode surges while preserving signal integrity. Use Value: Sub-1 ns response prevents data corruption during 8 kV contact ESD strikes, maintaining >10 Mbps communication uptime. |
| Automotive Body Control Module (BCM) Power Rail | USB-C Port Overvoltage Protection |
Use Scenario: 12 V battery-supplied microcontroller power domain in BCMs where load dump transients exceed 100 V. IC Role / Device Role / Timing Role: Primary clamping device on main VDD rail, positioned upstream of LDO regulators to prevent latch-up or burnout. Use Value: 200 W peak power rating sustains multiple 10/1000 µs load-dump pulses without parameter shift or failure. | Use Scenario: VBUS line protection in portable medical monitors with USB-C host functionality, requiring robust ESD immunity. IC Role / Device Role / Timing Role: Unidirectional TVS between USB-C VBUS and system ground, sized to clamp 20 V overshoot from hot-plug events. Use Value: 100 V VRWM provides 20 % margin above 5 V nominal + 20 % tolerance, preventing false triggering during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ100A | Same VRWM (100 V) and VC (123 V), but SMA package (larger footprint, higher Ppk = 400 W) | Better suited for higher-energy surges; requires larger PCB area and different stencil design | Select SMAJ100A only if system-level testing shows 200 W insufficient for worst-case surge profiles |
| 1.5SMC100A | Higher Ppk (1500 W), DO-214AB package, same VRWM/VC specs, but 2.5× larger footprint and 3× higher thermal mass | Used in AC mains input stages or high-power motor drives where energy dissipation dominates size constraints | Choose 1.5SMC100A when protecting 48 V DC bus systems with >500 J surge energy requirements |
Compared with SMAJ100A and 1.5SMC100A, SMF100AT1G delivers identical clamping performance in a space-constrained SOD−123FL package optimized for high-density SMT layouts, making it preferred for portable and board-level protection where footprint and reflow compatibility are critical.
Availability
SMF100AT1G is available at Aetrix Electronics and suitable for industrial power supplies, telecom interface modules, automotive body control units, and USB-C peripheral designs requiring stable component supply and full traceability.
Supply support for SMF100AT1G 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 focused on energy-efficient innovation, serving automotive, industrial, cloud, and IoT markets with discrete, analog, and logic solutions.
The SMF series belongs to onsemi's transient voltage suppressor product line, engineered specifically for compact, high-reliability overvoltage protection in space-constrained DC power and signal-line applications.
FAQ
What is the clamping voltage of SMF100AT1G at its rated peak pulse current?
The SMF100AT1G has a maximum clamping voltage (VC) of 123 V at its peak pulse current (IPP) of 1.1 A under the standardized 10/1000 µs waveform. This value is guaranteed across temperature and lifetime, ensuring predictable protection margins for downstream components in the SMF100AT1G-protected circuit.
Is SMF100AT1G suitable for protecting RS-485 communication lines?
Yes, SMF100AT1G is suitable for RS-485 line protection when applied differentially across A/B lines with appropriate grounding. Its 100 V VRWM provides headroom above typical RS-485 common-mode ranges (±7 V to ±15 V), and its <1 ns response time prevents data corruption during ESD events-key for reliable SMF100AT1G deployment in industrial networks.
Does SMF100AT1G meet IEC61000−4−2 and IEC61000−4−4 standards?
Yes, SMF100AT1G is rated for IEC61000−4−2 Level 4 (±8 kV contact, ±15 kV air) and IEC61000−4−4 (40 A, 5/50 ns), as confirmed in the official onsemi datasheet. These certifications validate its use in SMF100AT1G-based designs targeting international EMC compliance without additional external filtering.
What is the thermal resistance of SMF100AT1G, and how does it affect PCB layout?
SMF100AT1G has a junction-to-cathode thermal resistance (RθJcathode) of 26 °C/W and junction-to-ambient (RθJA) of 325 °C/W on FR-4 with minimum recommended pad size. To maintain reliability under repeated surges, designers must follow the SOD−123FL footprint guidelines in the SMF100AT1G datasheet and avoid excessive copper isolation around the cathode pad.
Can SMF100AT1G be used in automotive applications such as body control modules?
Yes, SMF100AT1G is qualified for automotive environments with −55 °C to +150 °C operating temperature range and AEC-Q101 stress testing alignment. Its 100 V VRWM and 123 V clamping make it appropriate for 12 V battery rail protection in body control modules, especially where load dump transients must be limited below IC absolute maximum ratings in the SMF100AT1G-protected subsystem.
SMF100AT1G 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):
- 100V
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 162V
- Current - Peak Pulse (10/1000µs):
- 1.1A
- 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
SMF100AT1G FAQ
1.How can I place an order for SMF100AT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF100AT1G 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 SMF100AT1G reliable?
The price and inventory of SMF100AT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF100AT1G is usually 5 days.
3.What payment methods are accepted for SMF100AT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF100AT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF100AT1G?
SMF100AT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF100AT1G 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 SMF100AT1G?
For technical support, including SMF100AT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF100AT1G requirements.
6.How does Aetrix verify that SMF100AT1G is sourced from the original manufacturer or authorized distributors?
All SMF100AT1G 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 SMF100AT1G meets industry standards.
7.What is the process for return or replacement of SMF100AT1G?
All SMF100AT1G units undergo pre-shipment inspection (PSI). If there is an issue with SMF100AT1G, 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 SMF100AT1G part is unused and in its original packaging.
Return procedure for SMF100AT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF100AT1G 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
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