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onsemi SMF100AT1
- Part No.:
- SMF100AT1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SOD-123F
- Datasheet:
-
SMF100AT1.pdf
- Description:
- TVS DIODE 100VWM 162VC SOD123FL
- Quantity:
- Payment:
- Shipping:
Inventory:5,448
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Product details
Overview
SMF100AT1 from onsemi is a unidirectional transient voltage suppressor (TVS) diode designed for overvoltage protection in DC power rails and signal lines. It features a 100 V working peak reverse voltage (VRWM), 123 V maximum clamping voltage at 162 A peak pulse current, and 200 W peak pulse power rating at 10/1000 µs waveform. Its SOD−123FL package enables compact placement in portable power supplies and USB interface protection circuits.
For engineers reviewing the SMF100AT1 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system operating voltage, VC margin relative to IC absolute maximum ratings, IEC61000−4−2/−4 compliance, thermal derating under repeated surge conditions, and footprint compatibility with high-density PCB layouts.
Technical Context
The SMF100AT1 operates as a zener-based avalanche clamp, conducting only when reverse voltage exceeds its breakdown threshold (VBR = 111–123 V). Its <1 ns response time ensures suppression before sensitive downstream components experience overstress. The device sustains non-repetitive 10/1000 µs surges up to 162 A while limiting voltage to ≤123 V across the protected node.
Thermal performance is defined by RθJA = 325°C/W (with recommended FR-4 pad), enabling 385 mW steady-state dissipation at 25°C ambient. Junction temperature must remain ≤150°C during operation; derating applies above 25°C per Figure 4. Mounting on thermally enhanced substrates (e.g., aluminum core) doubles power handling capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 100 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 111 V / 123 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold tolerance |
| VC @ IPP | 123 V max @ 162 A - Clamped voltage during 10/1000 µs surge; determines worst-case stress on protected IC |
| IPP | 162 A - Peak pulse current survivable at rated clamping voltage; defines surge energy capacity |
| Ppk (10/1000 µs) | 200 W - Peak pulse power handling; used to size TVS for IEC61000−4−4 40 A surge events |
| IR @ VRWM | 1 µA max - Reverse leakage at rated working voltage; ensures minimal standby power loss |
| Response Time | <1 ns - Time from overvoltage onset to conduction; critical for protecting fast logic and data lines |
Pinout & Package
SOD−123FL surface-mount package: 2.5–2.9 mm length × 1.5–1.8 mm width × ≤1.0 mm height; cathode indicated by polarity band; 100% matte tin lead finish; MSL 1 rated; compatible with standard reflow profiles up to 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to protected line (e.g., VBUS); carries surge current into ground path during clamping |
| 2 (Non-banded End) | Anode | Connected to circuit ground; completes low-impedance path for transient energy dissipation |
Key Features
| Feature | Design Value |
|---|---|
| IEC61000−4−2 Level 4 ESD Protection | Withstands >16 kV contact discharge without degradation-enables robust USB/UART port hardening |
| IEC61000−4−4 40 A Surge Immunity | Clamps 40 A 5/50 ns transients to ≤123 V-meets industrial power rail immunity requirements |
| Low Profile (≤1.0 mm height) | Enables use in ultra-thin consumer devices such as smartphones and wearables where Z-height is constrained |
| Small Footprint (8.45 mm²) | Minimizes PCB area usage-critical for space-constrained DC-DC converter input filtering and sensor interface protection |
| Tape-and-Reel Packaging (3,000/reel) | Supports automated SMT assembly with consistent orientation (cathode toward sprocket holes) |
Applications
| USB Power Delivery Interface | Industrial DC Power Input |
|---|---|
Use Scenario: Protecting 5–20 V USB-C PD lines against ESD and load dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to clamp overvoltage before reaching PD controller or load switch. Use Value: Limits VBUS stress to ≤123 V during 162 A surges, preserving PD controller reliability and maintaining USB-IF compliance. | Use Scenario: Safeguarding 24 V or 48 V industrial PLC power inputs from inductive switching spikes and lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main DC input rail upstream of DC-DC converters and microcontrollers. Use Value: Absorbs 200 W transient energy without failure, preventing brownouts and latch-up in control circuitry during factory equipment switching events. |
| Automotive Body Control Module | Medical Portable Device Battery Input |
Use Scenario: Protecting 12 V supply rails in BCMs from ISO 7637-2 pulse 1/2a/3a transients. IC Role / Device Role / Timing Role: Secondary TVS stage after primary LC filter, providing fast-response clamping for microcontroller and CAN transceiver power domains. Use Value: Responds in <1 ns to suppress sub-microsecond spikes, ensuring CAN communication integrity during ignition noise events. | Use Scenario: Shielding lithium-ion battery input circuits in portable ultrasound or infusion pumps from accidental hot-plug transients. IC Role / Device Role / Timing Role: Front-end protector on battery charge path, placed between connector and fuel gauge IC or protection IC. Use Value: Withstands >16 kV HBM ESD without parametric shift-maintaining battery state-of-charge accuracy and safety-critical firmware integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage 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 RθJA = 40°C/W) | Less suitable for ultra-dense layouts; better thermal mass for infrequent high-energy surges | Select SMAJ100A only if board space allows larger 4.5×2.7 mm package and thermal design prioritizes single-event energy absorption over density |
| 1.5SMC100A | Higher Ppk (1500 W), DO-214AB package, same VRWM/VC but 5× larger footprint and 3× higher leakage (5 µA) | Targeted at automotive alternator load dump; not optimized for portable ESD-sensitive systems | Choose 1.5SMC100A only for 12 V automotive systems requiring ISO 16750-2 compliance-not for space-constrained medical or consumer designs |
Compared with SMAJ100A and 1.5SMC100A, the SMF100AT1 delivers identical clamping performance in a 60% smaller footprint and 1 µA leakage-making it optimal for high-density, low-power, ESD-critical applications where board area and standby current matter.
Availability
SMF100AT1 is available at Aetrix Electronics and suitable for USB power delivery interfaces, industrial DC power inputs, automotive body control modules, and medical portable device battery inputs requiring stable component supply and full traceability.
Supply support for SMF100AT1 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 management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and IoT markets.
The SMF series belongs to onsemi's transient voltage suppressor product line, engineered specifically for compact, high-reliability overvoltage protection in portable electronics, industrial controls, and automotive subsystems where low profile and fast response are mandatory.
FAQ
What is the maximum clamping voltage of the SMF100AT1 under surge conditions?
The SMF100AT1 has a maximum clamping voltage (VC) of 123 V when subjected to its rated peak pulse current of 162 A under the 10/1000 µs waveform. This value is guaranteed across temperature and represents the worst-case voltage seen by downstream components during transient events, making it essential for verifying margin against IC absolute maximum ratings.
Does the SMF100AT1 meet IEC61000−4−2 and IEC61000−4−4 standards?
Yes, the SMF100AT1 is rated for IEC61000−4−2 Level 4 ESD protection (>16 kV contact discharge) and provides 40 A surge immunity per IEC61000−4−4. These capabilities are validated in the manufacturer's characterization and are intrinsic to its zener avalanche structure and low dynamic impedance-no external circuitry is needed to achieve compliance.
What is the thermal resistance and steady-state power dissipation of the SMF100AT1?
The SMF100AT1 has a junction-to-ambient thermal resistance (RθJA) of 325°C/W when mounted on the recommended FR-4 footprint. At 25°C ambient, this yields a maximum steady-state power dissipation of 385 mW. Derating is required above 25°C per Figure 4 in the datasheet; at 85°C ambient, usable power drops to ~240 mW.
How is polarity identified on the SMF100AT1 SOD−123FL package?
The SMF100AT1 uses a cathode band (dark stripe) on the SOD−123FL package to indicate Pin 1 (cathode). During tape-and-reel packaging, the cathode end is oriented toward the sprocket holes-ensuring consistent placement in automated pick-and-place machines and correct orientation on the PCB.
Can the SMF100AT1 be used in bidirectional protection configurations?
No, the SMF100AT1 is a unidirectional TVS diode and must be used with cathode tied to the protected line and anode to ground. For bidirectional protection (e.g., AC signal lines), a separate symmetric device like the SMBJ100A or a back-to-back configuration would be required-using SMF100AT1 in reverse bias risks permanent damage due to lack of forward conduction rating.
SMF100AT1 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
SMF100AT1 FAQ
1.How can I place an order for SMF100AT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF100AT1 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 SMF100AT1 reliable?
The price and inventory of SMF100AT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF100AT1 is usually 5 days.
3.What payment methods are accepted for SMF100AT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF100AT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF100AT1?
SMF100AT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF100AT1 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 SMF100AT1?
For technical support, including SMF100AT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF100AT1 requirements.
6.How does Aetrix verify that SMF100AT1 is sourced from the original manufacturer or authorized distributors?
All SMF100AT1 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 SMF100AT1 meets industry standards.
7.What is the process for return or replacement of SMF100AT1?
All SMF100AT1 units undergo pre-shipment inspection (PSI). If there is an issue with SMF100AT1, 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 SMF100AT1 part is unused and in its original packaging.
Return procedure for SMF100AT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF100AT1 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.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
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