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onsemi SMF160AT1G
- Part No.:
- SMF160AT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- SOD-123F
- Datasheet:
-
SMF160AT1G.pdf
- Description:
- TVS DIODE 160VWM 259VC SOD123FL
- Quantity:
- Payment:
- Shipping:
Inventory:4,813
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Product details
Overview
SMF160AT1G from onsemi is a unidirectional Zener transient voltage suppressor (TVS) diode in SOD-123FL package, designed for high-energy ESD and surge protection at DC power rails. It features 160 V working peak reverse voltage (VRWM), 197 V maximum clamping voltage (VC) at 259 A peak pulse current (IPP), and <1 ns response time - ideal for protecting industrial power supplies and telecom interface circuits against IEC61000-4-2 Level 4 and IEC61000-4-4 transients.
For engineers reviewing the SMF160AT1G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system operating voltage, VC margin relative to load withstand capability, IPP rating under defined 10/1000 µs waveform, and low-profile SOD-123FL footprint compatibility with space-constrained PCB layouts.
Technical Context
This TVS diode operates as a unidirectional shunt clamp, leveraging avalanche breakdown of a planar Zener junction to divert transient energy away from downstream circuitry. Its low zener impedance ensures stable clamping during fast-rising surges, while the thermally optimized SOD-123FL package supports 175 W peak pulse power (10/1000 µs) and 1000 W non-repetitive surge handling (8/20 µs).
It meets IEC61000-4-2 Class 3 ESD immunity (>16 kV HBM) and delivers 40 A IEC61000-4-4 protection. The device exhibits <1 µA leakage at VRWM and maintains specified clamping performance across -55°C to +150°C operating temperature range, with MSL 1 reflow compatibility up to 260°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 160 V - minimum recommended working voltage; must match or exceed protected line's continuous DC or peak AC voltage |
| VC @ IPP | 197 V max @ 259 A - defines maximum voltage seen by protected IC during worst-case 10/1000 µs surge |
| IPP | 259 A - peak pulse current capability per 10/1000 µs waveform; determines surge energy handling (175 W) |
| Response Time | <1 ns - enables clamping before most sensitive logic or analog components experience overvoltage stress |
| Leakage @ VRWM | <1 µA - negligible standby power loss and minimal impact on high-impedance bias networks |
| ESD Rating | Class 3 HBM (>16 kV); IEC61000-4-2 Level 4 - qualifies for robust front-end protection in handheld and industrial equipment |
| Package | SOD-123FL - 2.7 mm × 1.6 mm footprint, 1.0 mm max height; compatible with automated SMT assembly and compact board designs |
Pinout & Package
SOD-123FL is a surface-mount, flat-lead plastic package with cathode indicated by a polarity band. Total footprint area is 8.45 mm²; maximum height is 1.0 mm. Leads are 100% matte tin, RoHS-compliant, and qualified for reflow up to 260°C (MSL 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to protected line's higher-potential side (e.g., VBUS, VIN); conducts during reverse transient |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential reference; completes current path during clamping event |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SOD-123FL package | 1.0 mm max height enables use in ultra-thin consumer and portable electronics without mechanical interference |
| 175 W peak pulse power (10/1000 µs) | Supports robust protection in 24–48 V industrial control and telecom power distribution systems |
| IEC61000-4-4 40 A surge immunity | Validated for harsh electrical fast transient (EFT) environments such as factory automation and motor drive interfaces |
| Pb-Free (RoHS-compliant) construction | Meets global environmental compliance requirements without compromising thermal or electrical performance |
| Cathode polarity band marking | Enables rapid visual verification during manual inspection and automated optical recognition (AOI) in SMT lines |
Applications
| Industrial Power Supply Protection | Telecom Interface Surge Suppression |
|---|---|
Use Scenario: Protecting 48 V DC input stage of programmable logic controllers (PLCs) against lightning-induced surges on field wiring. IC Role / Device Role / Timing Role: Unidirectional shunt TVS diode placed between VIN and GND, clamping transients before they reach upstream DC-DC converters. Use Value: Limits voltage to ≤197 V during 259 A surge, preventing damage to 200 V-rated input capacitors and MOSFETs. | Use Scenario: Safeguarding RS-485 transceiver data lines in base station remote radio units exposed to outdoor grounding differentials. IC Role / Device Role / Timing Role: Line-side TVS on differential bus, activated within <1 ns to suppress common-mode EFT bursts per IEC61000-4-4. Use Value: Maintains signal integrity by clamping without adding >0.5 pF capacitance at 50% VRWM, avoiding data rate degradation. |
| Automated Test Equipment (ATE) Front-End | Renewable Energy Inverter DC Link |
Use Scenario: Protecting precision analog input channels in benchtop multimeters from accidental connection to live mains or relay bounce spikes. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS on signal conditioning path, ensuring minimal offset error during measurement. Use Value: Preserves 16-bit ADC accuracy by limiting transient-induced baseline shift and eliminating post-surge recovery drift. | Use Scenario: Guarding high-voltage DC link (up to 200 V) in solar microinverters against grid-switching transients and capacitor discharge events. IC Role / Device Role / Timing Role: Parallel-connected TVS on DC+ rail, absorbing repetitive 175 W pulses without thermal runaway due to low RθJA (325°C/W). Use Value: Extends electrolytic capacitor lifetime by reducing voltage overshoot stress during MPPT controller switching transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ160A | Same VRWM (160 V) and VC (197 V), but SMA package (larger footprint, 4.5 mm × 2.7 mm) | Higher thermal mass allows 400 W peak power (vs. 175 W), suited for higher-duty-cycle surge environments | Select SMAJ160A when board space permits and surge repetition rate exceeds 1 pulse/minute |
| P6SMB160A | Same VRWM and VC, but DO-214AA (SMB) package; 600 W peak power rating, higher IR (5 µA max) | Designed for chassis-level primary protection; requires larger pad layout and higher mounting clearance | Choose P6SMB160A for first-stage protection ahead of secondary SMF160AT1G devices in multi-stage architectures |
Compared with SMAJ160A and P6SMB160A, SMF160AT1G offers the smallest footprint and lowest profile for space-critical secondary protection, trading peak power headroom for PCB area savings - optimal where layout density and thinness are prioritized over extreme single-pulse energy absorption.
Availability
SMF160AT1G is available at Aetrix Electronics and suitable for industrial power supplies, telecom interface modules, automated test equipment, and renewable energy inverters requiring stable component supply and long-term lifecycle support.
Supply support for SMF160AT1G 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 (Nasdaq: ON) is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications.
The SMFxxxAT1G series belongs to onsemi's transient voltage suppression portfolio, engineered specifically for compact, high-reliability secondary protection in DC-powered systems where board space and thermal constraints limit traditional TVS options.
FAQ
What is the maximum clamping voltage of SMF160AT1G under rated surge conditions?
The SMF160AT1G has a maximum clamping voltage (VC) of 197 V when subjected to its rated peak pulse current of 259 A under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range (-55°C to +150°C) and defines the upper voltage limit imposed on protected circuitry during a surge event. Designers must ensure downstream components tolerate this clamped voltage level.
Is SMF160AT1G suitable for bidirectional transient protection?
No, SMF160AT1G is a unidirectional TVS diode and is not rated for bidirectional operation. Its electrical characteristics - including breakdown voltage, clamping behavior, and leakage - are specified only for reverse-biased (cathode-positive) conduction. For AC or dual-polarity signal lines, a dedicated bidirectional TVS such as SMBJ160CA or an external back-to-back configuration would be required instead of SMF160AT1G.
Does SMF160AT1G meet lead-free soldering standards?
Yes, SMF160AT1G is explicitly designated as Pb-Free (RoHS-compliant) per its "G" suffix and uses 100% matte tin lead finish. It is qualified for lead-free reflow soldering with a maximum peak temperature of 260°C and meets MSL Level 1 moisture sensitivity requirements - enabling compatibility with standard J-STD-020-compliant SMT processes without pre-baking.
How does the SOD-123FL package of SMF160AT1G compare to SMA or SMB packages in thermal performance?
The SOD-123FL package of SMF160AT1G has a junction-to-ambient thermal resistance (RθJA) of 325°C/W, higher than SMA (≈200°C/W) or SMB (≈150°C/W) packages. This means SMF160AT1G dissipates heat less efficiently under sustained or repetitive surges. Its 175 W peak rating applies only to single, non-repetitive 10/1000 µs pulses; for high-duty-cycle applications, derating per Figure 4 of the datasheet is mandatory to avoid thermal failure.
Can SMF160AT1G be used to protect a 150 V DC bus?
Yes, SMF160AT1G is appropriate for protecting a 150 V DC bus because its 160 V working peak reverse voltage (VRWM) exceeds the bus voltage, providing sufficient margin to prevent leakage-related power loss or premature conduction during normal operation. The 197 V clamping voltage also leaves ~47 V of headroom below typical 200 V-rated electrolytic capacitors and MOSFETs commonly used in such systems.
SMF160AT1G 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):
- 160V
- Voltage - Breakdown (Min):
- 178V
- Voltage - Clamping (Max) @ Ipp:
- 259V
- Current - Peak Pulse (10/1000µs):
- 700mA
- 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
SMF160AT1G FAQ
1.How can I place an order for SMF160AT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF160AT1G 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 SMF160AT1G reliable?
The price and inventory of SMF160AT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF160AT1G is usually 5 days.
3.What payment methods are accepted for SMF160AT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF160AT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF160AT1G?
SMF160AT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF160AT1G 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 SMF160AT1G?
For technical support, including SMF160AT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF160AT1G requirements.
6.How does Aetrix verify that SMF160AT1G is sourced from the original manufacturer or authorized distributors?
All SMF160AT1G 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 SMF160AT1G meets industry standards.
7.What is the process for return or replacement of SMF160AT1G?
All SMF160AT1G units undergo pre-shipment inspection (PSI). If there is an issue with SMF160AT1G, 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 SMF160AT1G part is unused and in its original packaging.
Return procedure for SMF160AT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF160AT1G Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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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
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D5V0L1B2WS-7
Diodes Incorporated
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