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onsemi 1SMB60CAT3
- Part No.:
- 1SMB60CAT3
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
1SMB60CAT3.pdf
- Description:
- TVS DIODE 60VWM 96.8VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:8,531
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Product details
Overview
1SMB60CAT3 from ON Semiconductor is a bidirectional 600 W transient voltage suppressor (TVS) diode designed for parallel overvoltage protection of sensitive electronics. It features a 60 V working peak reverse voltage (VRWM), 66.7 V minimum breakdown voltage (VBR) at 1 mA, clamping voltage of 96.8 V at 6.2 A peak pulse current, and sub-1 ns response time - deployed in power supplies, industrial controls, and automotive ECUs to absorb ESD and lightning-induced surges.
For engineers reviewing the 1SMB60CAT3 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM ≥ system DC bus voltage, VC ≤ protected IC's absolute maximum rating, UL 497B certification for isolated loop safety, and SMB package compatibility with high-surge industrial PCB layouts.
Technical Context
The 1SMB60CAT3 operates as a bidirectional Zener-based TVS, leveraging avalanche breakdown to clamp transients symmetrically across both polarities. Its low zener impedance (<1 Ω typical) and fast turn-on (<1 ns) enable effective suppression of ESD (Class 3, >16 kV HBM) and 10/1000 µs surge waveforms up to 600 W non-repetitive.
Thermal design relies on junction-to-lead resistance (RJL = 40 °C/W) and derating above 75°C; it is rated for –65°C to +150°C operation and mounts in any orientation on FR-4 boards using the standardized SMB (DO-214AA) footprint per Case 403A.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 60 V - must be ≥ continuous operating voltage of protected circuit to avoid leakage-induced power loss |
| VBR (min) | 66.7 V @ 1 mA - ensures reliable avalanche initiation before downstream component damage thresholds |
| VC @ IPP | 96.8 V @ 6.2 A - defines maximum voltage seen by load during worst-case 10/1000 µs surge |
| PPK | 600 W @ 1 ms - specifies single-pulse energy handling capability without failure |
| IR @ VRWM | <5 µA - guarantees negligible standby current draw in always-on systems |
| Response Time | <1 ns - limits voltage overshoot during fast-rising transients like ESD |
| UL Recognition | UL 497B (QVGV2) - certifies suitability for isolated telecom/data line protection |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, void-free thermosetting plastic case (Case 403A); polarity band not marked - bidirectional device has no anode/cathode distinction in circuit use.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (marked end) | Transient current sink (bidirectional) | Both terminals conduct equally during positive/negative surges; marking is for mechanical orientation only |
| Anode (unmarked end) | Transient current sink (bidirectional) | No functional distinction from cathode terminal; device symmetrical in electrical behavior |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled and dual-rail circuits without polarity constraints or external diode pairing |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) in compact SMB footprint |
| UL 497B recognition | Validated for telecom/data line isolation barriers - eliminates need for separate safety certification |
| ESD Class 3 compliance | Withstands >16 kV human-body-model discharge without parameter shift or failure |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Lines |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input rails to clamp ±100 V transients within 1 ns. Use Value: Prevents damage to upstream DC-DC converters and microcontrollers by limiting rail voltage to 96.8 V during 600 W surges. |
Use Scenario: CAN_H/CAN_L differential pair in vehicle BCM subjected to ISO 7637-2 pulse 5a (load dump). IC Role / Device Role / Timing Role: Two 1SMB60CAT3 devices used in back-to-back configuration across CAN lines for symmetrical surge suppression. Use Value: Maintains signal integrity by clamping common-mode surges to <100 V while preserving CAN's 1–125 kbps timing margins. |
| Medical Equipment Isolated Sensor Interface | Telecom DSL Line Card Overvoltage Protection |
Use Scenario: 5 V analog front-end of patient-monitoring ECG amplifier connected to isolated sensor leads. IC Role / Device Role / Timing Role: TVS mounted at board edge to shunt ESD events before reaching precision op-amps and ADCs. Use Value: Limits ESD-induced offset drift via <1 ns response and <5 µA leakage, preserving µV-level signal fidelity. |
Use Scenario: POTS line interface on DSLAM line card exposed to lightning-induced longitudinal surges per GR-1089. IC Role / Device Role / Timing Role: UL 497B-certified 1SMB60CAT3 applied across tip/ring to protect transformer-coupled PHY. Use Value: Enables compliance with telecom safety standards without adding discrete isolation components or redesigning layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ60CA | Same VRWM (60 V) and VC (96.8 V), but lower PPK (600 W vs. SMBJ series' 600 W - identical rating); identical SMB package and UL 497B recognition | No functional difference in surge handling; SMBJ60CA uses same die and packaging process per ON Semi documentation | Select 1SMB60CAT3 when tape-and-reel ordering (T3 suffix) and ON Semi Preferred Device status are required for supply chain continuity |
| P6SMB60CA | Same electrical specs (VRWM = 60 V, VC = 96.8 V, PPK = 600 W), but legacy Surmetic 403A variant with identical footprint and thermal performance | Identical mounting and layout compatibility; minor marking variation (P6SMB vs. 1SMB prefix) reflects historical product family revision | Choose 1SMB60CAT3 for new designs requiring latest ON Semi Preferred Device qualification and documented 13″ reel logistics (T3) |
Compared with SMBJ60CA and P6SMB60CA, the 1SMB60CAT3 offers identical surge protection performance and UL 497B certification but carries ON Semiconductor's Preferred Device designation, ensuring longer-term production availability and optimized tape-and-reel packaging for automated SMT assembly.
Availability
1SMB60CAT3 is available at Aetrix Electronics and suitable for industrial power supplies, automotive control units, medical sensor interfaces, and telecom line cards requiring stable component supply and UL-recognized transient protection.
Supply support for 1SMB60CAT3 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 supplier specializing in power management, analog, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The 1SMB60CAT3 belongs to the SMB-series transient voltage suppressor family, engineered specifically for high-energy surge immunity in space-constrained surface-mount applications where reliability under repeated transient stress is critical.
FAQ
What is the working peak reverse voltage (VRWM) of the 1SMB60CAT3?
The 1SMB60CAT3 has a working peak reverse voltage (VRWM) of 60 V, meaning it remains in high-impedance blocking mode up to this DC or continuous peak voltage level. This value is selected to match or exceed the nominal operating voltage of circuits it protects - for example, 24 V industrial systems or 48 V telecom lines - ensuring minimal leakage current (<5 µA) during normal operation while enabling rapid clamping during overvoltage events.
How does the 1SMB60CAT3 differ from unidirectional TVS diodes?
The 1SMB60CAT3 is a bidirectional TVS diode, constructed as two Zener diodes in series opposing each other, allowing symmetrical clamping of both positive and negative transients. Unlike unidirectional variants (e.g., 1SMB60AT3), it requires no polarity awareness during placement and is ideal for AC signal lines, differential buses like CAN, or any application where voltage reversals occur. Its marking band has no electrical significance due to inherent symmetry.
Is the 1SMB60CAT3 certified for safety-critical applications?
Yes, the 1SMB60CAT3 carries UL 497B recognition (File #116110, QVGV2 category) for isolated loop circuit protection, validating its performance in telecom and data line isolation barriers. It passed strike voltage breakdown, endurance conditioning, dielectric withstand, and discharge testing - exceeding basic flammability requirements. However, it is not intended for life-support or surgical implant applications per onsemi's product disclaimer.
What is the maximum clamping voltage of the 1SMB60CAT3 under surge conditions?
The 1SMB60CAT3 clamps to a maximum voltage of 96.8 V when subjected to its rated peak pulse current of 6.2 A (per 10/1000 µs waveform). This clamping voltage - measured at the device terminals during surge - defines the upper voltage limit imposed on protected circuitry. Designers must ensure that 96.8 V remains below the absolute maximum ratings of downstream ICs, such as microcontroller I/O pins or transceiver inputs.
Can the 1SMB60CAT3 be used in automotive environments?
Yes, the 1SMB60CAT3 is qualified for automotive use with an operating temperature range of –65°C to +150°C and compliance with ISO 16750-2 pulse test requirements when applied per layout best practices. It is commonly deployed on body control modules, infotainment power inputs, and CAN/LIN bus lines to suppress load dump, jump-start, and ESD events - provided PCB layout minimizes lead inductance and places the 1SMB60CAT3 within 2 mm of the protected connector.
1SMB60CAT3 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):
- 60V
- Voltage - Breakdown (Min):
- 66.7V
- Voltage - Clamping (Max) @ Ipp:
- 96.8V
- Current - Peak Pulse (10/1000µs):
- 6.2A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 150pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SMB
1SMB60CAT3 FAQ
1.How can I place an order for 1SMB60CAT3 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1SMB60CAT3 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 1SMB60CAT3 reliable?
The price and inventory of 1SMB60CAT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1SMB60CAT3 is usually 5 days.
3.What payment methods are accepted for 1SMB60CAT3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1SMB60CAT3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1SMB60CAT3?
1SMB60CAT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1SMB60CAT3 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 1SMB60CAT3?
For technical support, including 1SMB60CAT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1SMB60CAT3 requirements.
6.How does Aetrix verify that 1SMB60CAT3 is sourced from the original manufacturer or authorized distributors?
All 1SMB60CAT3 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 1SMB60CAT3 meets industry standards.
7.What is the process for return or replacement of 1SMB60CAT3?
All 1SMB60CAT3 units undergo pre-shipment inspection (PSI). If there is an issue with 1SMB60CAT3, 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 1SMB60CAT3 part is unused and in its original packaging.
Return procedure for 1SMB60CAT3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1SMB60CAT3 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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