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onsemi 1SMB160AT3
- Part No.:
- 1SMB160AT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB160AT3.pdf
- Description:
- TVS DIODE 160VWM 259VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:8,721
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Product details
Overview
1SMB160AT3 from ON Semiconductor is a unidirectional 600 W peak power TVS diode designed for transient overvoltage protection in DC power rails and signal lines. It features a 160 V working peak reverse voltage (VRWM), 197 V minimum breakdown voltage (VBR) at 1 mA, clamps to ≤259 V at 2.3 A peak pulse current (IPP), and delivers sub-1 ns response time - ideal for safeguarding industrial power supplies and automotive control modules against ESD and lightning-induced surges.
For engineers reviewing the 1SMB160AT3 datasheet, pinout, applications, or equivalent options, key selection criteria include its UL 497B certification for isolated loop protection, 5.0 µA max reverse leakage at VRWM, and SMB (Case 403A) surface-mount package optimized for high-surge reliability in space-constrained PCB layouts.
Technical Context
The 1SMB160AT3 operates as a Zener-based transient voltage suppressor with unidirectional polarity, leveraging avalanche breakdown to clamp transients above its rated VRWM. Its thermal design supports 3.0 W DC dissipation at 75°C lead temperature, with junction-to-lead thermal resistance of 40°C/W - enabling robust surge handling without thermal runaway under repetitive 1 ms pulses.
It exhibits low dynamic impedance during clamping, evidenced by a 259 V VC at IPP = 2.3 A, and maintains <5.0 µA leakage above 10 V. The device meets Class 3 ESD immunity (>16 kV HBM) and is qualified for operation from −65°C to +150°C, making it suitable for harsh-environment industrial and automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Power Rating | 600 W @ 1.0 ms pulse - sustains single high-energy surges without failure in telecom or power supply input stages |
| Working Peak Reverse Voltage (VRWM) | 160 V - selected to exceed nominal DC bus voltage (e.g., 130–150 V systems) while minimizing leakage |
| Breakdown Voltage (VBR) | 197–209 V @ IT = 1 mA - ensures reliable turn-on before downstream ICs reach absolute maximum ratings |
| Clamping Voltage (VC) | ≤259 V @ IPP = 2.3 A - limits transient stress on protected circuitry to safe levels during surge events |
| Reverse Leakage Current | ≤5.0 µA @ VRWM - negligible standby power loss in always-on industrial controllers |
| Response Time | <1.0 ns - fast enough to suppress ESD and fast-rising transients before damage occurs |
| ESD Rating | Class 3 (>16 kV HBM) - exceeds IEC 61000-4-2 Level 4 for system-level ESD robustness |
| UL Recognition | UL 497B (QVGQ2) - certified for isolated loop circuit protection in safety-critical communication interfaces |
Pinout & Package
Package: SMB (Case 403A), surface-mount, void-free thermosetting plastic with modified L-bend leads and cathode polarity band. Dimensions: 4.32 mm × 2.13 mm × 2.26 mm (L × W × H).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during forward conduction | Connected to lower-potential side (e.g., ground or return path) in unidirectional protection configuration |
| Cathode | Current exit terminal during reverse-biased clamping | Connected to protected line (e.g., 160 V rail); polarity band identifies this terminal for correct PCB placement |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges without derating in compact SMB footprint |
| UL 497B recognition | Validates suitability for telecom and industrial isolated interface protection per safety standard QVGQ2 |
| Pb-free (G suffix) construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profiles up to 260°C |
| Low clamping ratio (VC/VBR ≈ 1.31) | Minimizes overvoltage margin between clamping and breakdown - critical for tight-tolerance 160 V systems |
| −65°C to +150°C operating range | Supports deployment in engine control units, outdoor power converters, and industrial PLCs without thermal derating |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
|
Use Scenario: 160 V DC input stage of DIN-rail mounted AC/DC converter exposed to load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed across input terminals to shunt surge energy to ground. Use Value: Clamps 10/1000 µs transients to ≤259 V, preventing MOSFET gate oxide rupture and bulk capacitor overvoltage failure. |
Use Scenario: 12 V CAN FD data line in BCM subjected to ESD events and battery reversal spikes. IC Role / Device Role / Timing Role: Secondary overvoltage clamp downstream of primary common-mode choke, referenced to chassis ground. Use Value: Sub-1 ns response ensures clamping occurs before CAN transceiver input pins exceed 25 V absolute maximum rating. |
| Telecom Isolated Loop Interface Protection | Medical Equipment Patient Monitoring Signal Line Protection |
|
Use Scenario: 48 V isolated RS-485 trunk line in building automation system with UL 497B compliance requirement. IC Role / Device Role / Timing Role: UL-recognized transient suppressor bridging isolated barrier to protect PHY ICs on both sides. Use Value: UL 497B certification validates dielectric withstand and endurance under repeated strike conditions per QVGQ2 listing. |
Use Scenario: Analog front-end sensor input (e.g., ECG electrode line) requiring low-leakage, biocompatible overvoltage protection. IC Role / Device Role / Timing Role: High-impedance clamping device placed before instrumentation amplifier input with minimal capacitive loading. Use Value: 5.0 µA max leakage at 160 V ensures no DC offset drift in microvolt-level physiological signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ160A | Same VRWM (160 V), but 600 W rating per JEDEC standards; slightly higher VC (260 V @ 2.3 A) and larger SMB-J package footprint | Approved for MIL-STD-883 Class B screening; preferred in aerospace-grade designs requiring extended qualification | Select SMBJ160A when full MIL-STD-883 compliance or tighter VC tolerance is required; verify PCB pad compatibility with SMB-J outline |
| 1.5SMC160A | Same electrical specs (VRWM, VBR, VC), but SMC package (7.11 mm × 6.22 mm) - 2.5× larger footprint and 1.5× higher thermal mass | Better suited for high-repetition-rate surge environments (e.g., motor drive inverters) due to superior thermal dissipation | Choose 1.5SMC160A only if board space allows and average power handling >0.55 W is needed; not drop-in compatible |
Compared with SMBJ160A and 1.5SMC160A, the 1SMB160AT3 offers optimal balance of surge capability, compact SMB footprint, and UL 497B certification - making it the preferred choice for cost-sensitive, space-constrained industrial and telecom applications where regulatory compliance is mandatory.
Availability
1SMB160AT3 is available at Aetrix Electronics and suitable for industrial power supplies, automotive control modules, and telecom infrastructure equipment requiring stable component supply and long-term lifecycle support.
Supply support for 1SMB160AT3 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, sensing, and connectivity solutions for automotive, industrial, and cloud power applications.
The 1SMB160AT3 belongs to the SMB series of transient voltage suppressors, engineered specifically for high-reliability overvoltage protection in space-constrained, high-surge industrial and automotive systems.
FAQ
What is the maximum clamping voltage of the 1SMB160AT3 under surge conditions?
The 1SMB160AT3 has a maximum clamping voltage (VC) of 259 V when subjected to its rated peak pulse current (IPP) of 2.3 A with a 10/1000 µs waveform. This value is measured per Figure 2 in the official datasheet and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components remain within their absolute maximum ratings.
Is the 1SMB160AT3 RoHS-compliant and lead-free?
Yes, the "G" suffix in 1SMB160AT3 explicitly denotes a Pb-free (lead-free) package compliant with RoHS Directive 2011/65/EU. The device uses ON Semiconductor's Surmetic molding compound and is qualified for standard reflow profiles up to 260°C for 10 seconds, meeting JEDEC J-STD-020 requirements for lead-free assembly.
Does the 1SMB160AT3 meet UL safety standards?
Yes, the 1SMB160AT3 carries UL 497B recognition under file #E210057 and classification QVGQ2 for isolated loop circuit protection. This certification covers performance validation for strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge testing - confirming its suitability for safety-critical telecom and industrial isolation barriers.
What is the reverse leakage current specification for the 1SMB160AT3 at its working voltage?
The 1SMB160AT3 specifies a maximum reverse leakage current (IR) of 5.0 µA at its working peak reverse voltage (VRWM) of 160 V, measured at TA = 25°C. This ultra-low leakage ensures minimal power loss and signal integrity degradation in high-impedance circuits such as sensor interfaces and precision analog monitoring paths.
Can the 1SMB160AT3 be used in bidirectional protection configurations?
No, the 1SMB160AT3 is a unidirectional TVS diode and must be used with correct polarity - cathode connected to the line being protected. For bidirectional applications (e.g., AC lines or differential buses), ON Semiconductor offers separate devices like 1SMB160AT3-B (not the same part number) or the 1SMB160CAT3 series, which are explicitly marked and characterized for symmetrical clamping.
1SMB160AT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- 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):
- 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
1SMB160AT3 FAQ
1.How can I place an order for 1SMB160AT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB160AT3 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 1SMB160AT3 reliable?
The price and inventory of 1SMB160AT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB160AT3 is usually 5 days.
3.What payment methods are accepted for 1SMB160AT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB160AT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB160AT3?
1SMB160AT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB160AT3 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 1SMB160AT3?
For technical support, including 1SMB160AT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB160AT3 requirements.
6.How does Aetrix verify that 1SMB160AT3 is sourced from the original manufacturer or authorized distributors?
All 1SMB160AT3 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 1SMB160AT3 meets industry standards.
7.What is the process for return or replacement of 1SMB160AT3?
All 1SMB160AT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB160AT3, 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 1SMB160AT3 part is unused and in its original packaging.
Return procedure for 1SMB160AT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB160AT3 Tags
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