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onsemi 1SMB16CAT3
- Part No.:
- 1SMB16CAT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB16CAT3.pdf
- Description:
- TVS DIODE 16VWM 26VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:8,360
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Product details
Overview
1SMB16CAT3 from ON Semiconductor is a bidirectional 600 W transient voltage suppressor (TVS) diode designed for parallel overvoltage protection of sensitive electronics. It features a 16 V working peak reverse voltage (VRWM), 19.7 V maximum clamping voltage (VC) at 23.1 A peak pulse current, and sub-1 ns response time - enabling robust surge suppression in power supply inputs and communication line interfaces.
For engineers reviewing the 1SMB16CAT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ circuit operating voltage, VC margin relative to protected IC absolute maximum ratings, IPP capability under defined 10/1000 µs waveform, and UL 497B recognition for isolated loop protection compliance.
Technical Context
The 1SMB16CAT3 operates as a bidirectional Zener-based TVS, leveraging avalanche breakdown to clamp transients above VRWM. Its low zener impedance (<1 Ω typical) and fast turn-on ensure minimal overshoot during ESD or lightning-induced surges.
It is rated for 600 W non-repetitive peak power at 1 ms pulse width (10/1000 µs waveform), with thermal derating to 0.55 W at TA = 25°C and junction-to-ambient thermal resistance of 226 °C/W on FR-4 board per ON Semiconductor's recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 16 V - must be ≥ continuous DC or peak AC operating voltage of protected circuit |
| VC @ IPP | 26.0 V @ 23.1 A - maximum clamped voltage seen by downstream components during 10/1000 µs surge |
| PPK | 600 W - peak transient energy absorption capability under standardized 1 ms pulse |
| Response Time | < 1 ns - ensures clamping activation before most semiconductor damage thresholds are exceeded |
| ESD Rating | Class 3 (>16 kV HBM) - qualifies for high-immunity industrial and automotive interface protection |
| UL Recognition | UL 497B (QVGV2) - certified for isolated loop circuit protection, including strike voltage and endurance testing |
| IR @ VRWM | < 5 µA - negligible leakage current avoids loading of high-impedance signal or bias networks |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, void-free thermosetting plastic case (Case 403A). Polarity band not marked; bidirectional operation eliminates anode/cathode orientation dependency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Anode/Cathode terminal (bidirectional) | Not polarity-marked; either terminal serves as common connection point in parallel protection configuration |
| Anode (unmarked end) | Anode/Cathode terminal (bidirectional) | Electrically symmetric - no functional distinction between terminals; device conducts identically in both directions above VBR |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses, or floating rails without polarity constraints |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) on 2 Ω source impedance with margin |
| UL 497B certification | Validated for telecom and industrial isolated loop protection - exceeds basic flammability requirements |
| Sub-1 ns response | Minimizes voltage overshoot before clamping engages, critical for protecting <10 V logic interfaces |
| Low leakage <5 µA | Preserves signal integrity and bias stability in high-impedance sensor or reference circuits |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Protection |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor that clamps surges before they reach upstream rectifier, bulk capacitor, and DC-DC controller. Use Value: 1SMB16CAT3's 26.0 V clamping voltage ensures protected ICs remain below 30 V absolute maximum rating during 100 A/100 ms load dump events. |
Use Scenario: CAN_H/CAN_L lines in BCM subjected to ESD and coupled transients from nearby relay switching. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair to shunt common-mode transients while preserving signal integrity. Use Value: Symmetrical clamping and <1 ns response prevent CAN transceiver latch-up during ±8 kV contact ESD per ISO 10605. |
| Medical Equipment Isolated Sensor Interface | Point-of-Sale Terminal AC Adapter Input |
Use Scenario: Isolated analog front-end of patient monitoring device connected to external sensors via long cables. IC Role / Device Role / Timing Role: UL 497B-recognized TVS on secondary-side signal lines to meet medical safety isolation barrier requirements. Use Value: UL certification validates performance under dielectric withstand and endurance conditioning tests required for Class II medical devices. |
Use Scenario: Primary-side input of universal AC/DC adapter subjected to surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: First-line overvoltage clamp before bridge rectifier and primary FET gate driver. Use Value: 600 W rating provides margin against 1.2/50 µs surges up to 2 kV on 120 VAC mains, reducing need for multi-stage protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ16CA | Same VRWM (16 V), identical SMB package, but higher clamping voltage (27.6 V @ 21.7 A) and lower PPK (600 W same, but lower IPP margin) | Suitable where layout allows slightly higher clamping; not UL 497B recognized | Select 1SMB16CAT3 when UL certification or tighter VC margin is required |
| 1.5SMC16CA | Higher power rating (1500 W), larger SMC package (DO-214AB), same VRWM and VBR range | Used where surge energy exceeds 600 W capability or board space permits larger footprint | Choose 1SMB16CAT3 for space-constrained SMB layouts requiring UL 497B and proven 600 W performance |
Compared with SMBJ16CA, 1SMB16CAT3 offers lower clamping voltage and UL 497B certification; compared with 1.5SMC16CA, it delivers equivalent protection in 40% smaller PCB area but with reduced single-pulse energy headroom.
Availability
1SMB16CAT3 is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, medical sensor interfaces, and consumer AC adapters requiring stable component supply and certified surge protection.
Supply support for 1SMB16CAT3 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 part of onsemi) is a global supplier of energy-efficient semiconductor solutions, specializing in power management, analog, sensing, and connectivity technologies.
The 1SMB16CAT3 belongs to the SMB-series transient voltage suppressors - engineered for cost-effective, high-reliability overvoltage protection in industrial, automotive, and medical systems where UL recognition and tight clamping are critical.
FAQ
What is the clamping voltage of the 1SMB16CAT3 under standard surge conditions?
The 1SMB16CAT3 has a maximum clamping voltage (VC) of 26.0 V when subjected to its rated peak pulse current of 23.1 A, measured using the industry-standard 10/1000 µs double-exponential waveform. This value is specified in the Electrical Characteristics table of the official ON Semiconductor datasheet and defines the upper voltage limit imposed on protected circuitry during transient events.
Is the 1SMB16CAT3 unidirectional or bidirectional?
The 1SMB16CAT3 is a bidirectional transient voltage suppressor, as confirmed by its "C" suffix (denoting bidirectional) and explicit labeling in the ON Semiconductor documentation. It functions identically in both polarities, making it suitable for AC-coupled lines, differential buses like CAN or RS-485, and floating ground systems without polarity concerns.
Does the 1SMB16CAT3 have UL recognition, and for what standard?
Yes, the 1SMB16CAT3 carries UL 497B recognition under file #116110, specifically certified for isolated loop circuit protection (category QVGV2). This validation covers strike voltage breakdown, endurance conditioning, temperature cycling, dielectric withstand, and discharge testing - exceeding basic package flammability requirements.
What is the maximum working peak reverse voltage (VRWM) for the 1SMB16CAT3?
The 1SMB16CAT3 has a working peak reverse voltage (VRWM) of 16 V, meaning it remains in high-impedance state up to this DC or continuous peak AC voltage. This parameter is critical for proper selection: VRWM must equal or exceed the normal operating voltage of the circuit being protected to avoid unintended conduction or leakage-related power loss.
What package type does the 1SMB16CAT3 use, and what are its key mechanical features?
The 1SMB16CAT3 uses the SMB (DO-214AA) surface-mount package (Case 403A), featuring void-free thermosetting plastic encapsulation, corrosion-resistant solderable leads, and a modified L-bend lead form for enhanced pad contact area. Its dimensions are standardized per ON Semiconductor's outline drawing, with maximum height of 2.11 mm and body width of 3.81 mm.
1SMB16CAT3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 23.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 520pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
1SMB16CAT3 FAQ
1.How can I place an order for 1SMB16CAT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB16CAT3 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 1SMB16CAT3 reliable?
The price and inventory of 1SMB16CAT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB16CAT3 is usually 5 days.
3.What payment methods are accepted for 1SMB16CAT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB16CAT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB16CAT3?
1SMB16CAT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB16CAT3 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 1SMB16CAT3?
For technical support, including 1SMB16CAT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB16CAT3 requirements.
6.How does Aetrix verify that 1SMB16CAT3 is sourced from the original manufacturer or authorized distributors?
All 1SMB16CAT3 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 1SMB16CAT3 meets industry standards.
7.What is the process for return or replacement of 1SMB16CAT3?
All 1SMB16CAT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB16CAT3, 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 1SMB16CAT3 part is unused and in its original packaging.
Return procedure for 1SMB16CAT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB16CAT3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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