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onsemi 1SMB160AT3G
- Part No.:
- 1SMB160AT3G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB160AT3G.pdf
- Description:
- TVS DIODE 160VWM 259VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
1SMB160AT3G from ON Semiconductor is a unidirectional 600 W peak power Zener transient voltage suppressor (TVS) designed for overvoltage protection of sensitive electronics. It features a 160 V working peak reverse voltage (VRWM), 197 V minimum breakdown voltage (VBR) at 1.0 mA, and clamps to 259 V at 2.3 A peak pulse current (IPP), making it suitable for industrial power supply input stages and telecom line interface protection.
For engineers reviewing the 1SMB160AT3G datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system DC bus voltage, clamping voltage margin relative to protected IC absolute maximum ratings, surge current capability under IEC 61000-4-5 waveform, and UL 497B recognition for isolated loop circuit protection.
Technical Context
The 1SMB160AT3G operates as a unidirectional Zener-based TVS diode, leveraging avalanche breakdown to clamp transients above its VRWM. Its low zener impedance and sub-1 ns response time enable fast suppression of ESD and lightning-induced surges without significant overshoot when properly laid out.
It is rated for 600 W peak pulse power (10/1000 µs waveform), supports 100 A non-repetitive forward surge current (8.3 ms half-sine), and maintains <5.0 µA leakage at VRWM. Thermal resistance from junction-to-lead is 25 °C/W, enabling reliable operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 160 V - Maximum continuous reverse operating voltage before clamping begins; must exceed system DC bus or signal swing. |
| VBR (min) | 197 V @ 1.0 mA - Minimum Zener breakdown voltage; defines lower bound of clamping threshold under test conditions. |
| VC @ IPP | 259 V @ 2.3 A - Clamped voltage during 10/1000 µs surge; determines maximum stress on downstream components. |
| PPK | 600 W @ 1 ms - Peak transient energy absorption capacity; validates compliance with IEC 61000-4-5 Level 3/4. |
| IR @ VRWM | <5.0 µA - Reverse leakage current at rated working voltage; ensures minimal standby power loss in high-impedance circuits. |
| Response Time | <1.0 ns - Time from transient onset to conduction onset; critical for protecting fast logic and analog interfaces. |
| UL Recognition | UL 497B QVGQ2 - Certified for isolated loop circuit protection; validates safety compliance in telecom and industrial isolation barriers. |
Pinout & Package
Package: SMB (Case 403A), surface-mount, Pb-free, void-free thermosetting plastic with modified L-bend leads and cathode polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction or transient clamping | Connected to ground or low-side reference; forms return path for surge current. |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., DC input, signal trace); carries full surge current to ground. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Supports robust IEC 61000-4-5 surge immunity in industrial power inputs and telecom lines. |
| ESD rating >16 kV HBM | Meets IEC 61000-4-2 Level 4 for system-level ESD protection without additional staging. |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage margin required between protected device's max rating and clamping level. |
| UL 497B recognition | Validates suitability for safety-critical isolated loop protection in medical and telecom infrastructure. |
| −65 °C to +150 °C operating range | Enables deployment in automotive engine compartments and industrial outdoor enclosures. |
Applications
| Industrial Power Supply Input Protection | Telecom Line Interface Protection |
|---|---|
|
Use Scenario: 160–200 VDC industrial power rail exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across input terminals to shunt surge energy to ground before reaching DC-DC converter input stage. Use Value: Clamps 10/1000 µs surges to ≤259 V, preventing damage to 300 V-rated input capacitors and MOSFETs. |
Use Scenario: T1/E1 line interface card in telecom central office equipment subject to lightning-induced longitudinal surges. IC Role / Device Role / Timing Role: Primary protection element on tip/ring pair, coordinated with gas discharge tube (GDT) secondary protection. Use Value: Sub-1 ns response ensures clamping initiates before GDT fires, limiting initial overshoot to safe levels for line driver ICs. |
| Medical Equipment Isolated Power Rails | Automotive Body Control Module Inputs |
|
Use Scenario: Secondary-side 160 V isolated DC bus in diagnostic imaging power supply requiring UL 497B compliance. IC Role / Device Role / Timing Role: UL-recognized transient suppressor on isolated output rail to meet regulatory requirements for patient-connected systems. Use Value: UL 497B QVGQ2 certification confirms validated performance in isolated loop protection, eliminating need for custom safety testing. |
Use Scenario: 12 V battery-fed sensor input in BCM exposed to ISO 7637-2 Pulse 1/2/5a transients. IC Role / Device Role / Timing Role: High-energy TVS on LIN bus or analog sensor line to absorb repetitive load dump energy. Use Value: 600 W peak power and 100 A surge rating withstand multiple ISO 7637-2 pulses without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SZ1SMB160AT3G | AEC-Q101 qualified; identical electrical specs but automotive-grade process control and PPAP documentation support. | Required for automotive ECUs; not necessary for industrial or telecom use where AEC-Q101 is not mandated. | Select 1SMB160AT3G for cost-sensitive industrial designs; choose SZ1SMB160AT3G only when automotive qualification is contractually required. |
| SMCJ160A | Higher 1500 W peak power; larger SMC package (7.11 × 6.22 mm vs. SMB 4.32 × 3.56 mm); same VRWM and VC. | Better suited for higher-energy surges (e.g., IEC 61000-4-5 Level 4); requires PCB area increase and layout revision. | Use SMCJ160A only if 600 W is insufficient per system-level surge testing; retain 1SMB160AT3G for space-constrained designs meeting Level 3. |
Compared with SZ1SMB160AT3G, the 1SMB160AT3G offers identical protection performance at lower cost and without automotive documentation overhead; compared with SMCJ160A, it delivers adequate 600 W surge handling in a 40% smaller footprint, simplifying layout in dense power modules.
Availability
1SMB160AT3G is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, medical isolated power rails, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for 1SMB160AT3G 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
ON Semiconductor (now onsemi) is a global semiconductor manufacturer specializing in power management, analog, sensors, and discrete devices for automotive, industrial, and communications markets.
The SMB-series TVS diodes, including the 1SMB160AT3G, were developed to deliver high-surge, low-clamping protection in compact surface-mount packages for mission-critical input stage hardening.
FAQ
What is the maximum clamping voltage of the 1SMB160AT3G under standard surge conditions?
The 1SMB160AT3G clamps to a maximum of 259 V when subjected to its rated peak pulse current of 2.3 A (10/1000 µs waveform). This value is specified in the Electrical Characteristics table and represents the upper limit of voltage seen by downstream components during a standardized surge event. The actual clamping voltage may be lower depending on surge amplitude and duration, but design margins must be based on the 259 V worst-case figure. This clamping behavior is intrinsic to the 1SMB160AT3G's Zener avalanche structure.
Does the 1SMB160AT3G meet UL safety standards for isolated circuit protection?
Yes, the 1SMB160AT3G is UL recognized under standard UL 497B (File #E210057, category QVGQ2) for isolated loop circuit protection. This certification covers validation of strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge performance - not just flammability. The 1SMB160AT3G's UL 497B listing makes it suitable for use in medical and telecom isolation barriers where regulatory compliance is mandatory, distinguishing it from non-certified TVS alternatives.
Can the 1SMB160AT3G be used in automotive applications?
The 1SMB160AT3G itself is not AEC-Q101 qualified; however, its automotive-grade variant SZ1SMB160AT3G shares identical electrical specifications and is fully qualified. For non-automotive applications such as industrial controls or telecom infrastructure, the 1SMB160AT3G is appropriate and cost-optimized. If automotive qualification is required - for example, in body control modules or infotainment power inputs - the SZ1SMB160AT3G must be selected to meet PPAP and process control requirements. Both parts use the same SMB package and pinout.
What is the thermal resistance and maximum operating temperature of the 1SMB160AT3G?
The 1SMB160AT3G has a thermal resistance from junction-to-lead (RJL) of 25 °C/W and an operating junction temperature range of −65 °C to +150 °C. Its maximum DC power dissipation is 3.0 W at 75 °C lead temperature, derating linearly above that point. These thermal characteristics allow the 1SMB160AT3G to sustain repeated surge events in high-ambient environments like industrial enclosures or under-hood automotive locations when mounted on adequate copper area. The 1SMB160AT3G's SURMETIC™ package enhances thermal reliability versus standard plastic SMB variants.
How does the 1SMB160AT3G compare to bidirectional TVS diodes in surge protection?
The 1SMB160AT3G is unidirectional and optimized for DC-biased lines where reverse polarity is not expected - such as positive power rails or single-ended signal paths. Unlike bidirectional TVS diodes (e.g., 1SMB160CAT3G), it provides no protection against negative-going transients beyond its forward voltage (~3.5 V). Therefore, the 1SMB160AT3G is inappropriate for AC lines or differential buses without external polarity control. Its advantage lies in tighter clamping and lower capacitance than equivalent bidirectional parts, improving signal integrity in DC-coupled applications.
1SMB160AT3G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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):
- 2.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 125pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
1SMB160AT3G FAQ
1.How can I place an order for 1SMB160AT3G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB160AT3G 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 1SMB160AT3G reliable?
The price and inventory of 1SMB160AT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB160AT3G is usually 5 days.
3.What payment methods are accepted for 1SMB160AT3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB160AT3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB160AT3G?
1SMB160AT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB160AT3G 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 1SMB160AT3G?
For technical support, including 1SMB160AT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB160AT3G requirements.
6.How does Aetrix verify that 1SMB160AT3G is sourced from the original manufacturer or authorized distributors?
All 1SMB160AT3G 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 1SMB160AT3G meets industry standards.
7.What is the process for return or replacement of 1SMB160AT3G?
All 1SMB160AT3G units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB160AT3G, 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 1SMB160AT3G part is unused and in its original packaging.
Return procedure for 1SMB160AT3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB160AT3G Tags
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