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Taiwan Semiconductor Corporation SMBJ110
- Part No.:
- SMBJ110
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ110.pdf
- Description:
- 600W, 135.5V, 10%, UNIDIRECTIONA
- Quantity:
- Payment:
- Shipping:
Inventory:9,871
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Product details
Overview
SMBJ110 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 110 V working stand-off voltage (VWM), 122–149 V breakdown voltage (VBR), 196 V maximum clamping voltage (VC) at 3.2 A peak impulse current, and 600 W peak pulse power rating with <1.0 ps response time - deployed in automotive power supply rails and industrial I/O protection.
For engineers reviewing the SMBJ110 datasheet, SMBJ110 pinout, SMBJ110 application, or SMBJ110 equivalent, key selection criteria include clamping voltage margin relative to protected IC VDD, leakage current at operating voltage, thermal derating above 25°C, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive transients.
Technical Context
The SMBJ110 operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast turn-on during voltage surges exceeding its VWM of 110 V. Its clamping action limits transient energy to safe levels for downstream components, with guaranteed VC ≤ 196 V at IPP = 3.2 A under 10/1000 µs waveform.
Thermal performance is defined by RθJC = 10 °C/W and RθJA = 55 °C/W, supporting continuous operation up to TJ = 150 °C. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, ensuring robustness in automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 122 V / 149 V @ IT = 1 mA - Ensures reliable breakdown onset within specified tolerance band |
| VC @ IPP | 196 V @ 3.2 A - Clamped voltage seen by protected circuit during worst-case 10/1000 µs surge |
| PPK | 600 W - Peak transient power dissipation capability per single non-repetitive event |
| ID @ VWM | ≤1 µA - Low leakage preserves system efficiency and prevents false triggering |
| TJ max | +150 °C - Enables use in under-hood automotive environments and high-ambient industrial enclosures |
Pinout & Package
Package: DO-214AA (SMB) - Surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, and cathode band marking for polarity identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Reverse-biased blocking terminal | Connected to protected line (e.g., 12 V rail); conducts only during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over temperature and long-term reliability in humid or contaminated environments |
| Fast response time <1.0 ps | Clamps ESD and EFT transients before sensitive logic or analog circuits experience overstress |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and inductive-switching immunity without external filtering |
| Moisture Sensitivity Level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cost and cycle time |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges above 110 V. Use Value: Limits clamped voltage to ≤196 V, preserving MCU and CAN transceiver integrity during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against field-wiring transients. IC Role / Device Role / Timing Role: Standoff protection element shunting induced surges before optocoupler or Schmitt trigger input stage. Use Value: Sub-µA leakage at 24 V ensures minimal impact on input threshold detection accuracy and power budget. |
| LED Driver Output Protection | RS-485 Transceiver Bus Line Protection |
Use Scenario: Shielding constant-current LED driver outputs from inductive kickback when driving solenoid-based dimming circuits. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing energy from L·di/dt spikes across output terminals. Use Value: 600 W PPK rating handles repetitive switching surges without degradation, extending driver lifetime. | Use Scenario: Guarding RS-485 differential bus lines (A/B) against ESD and lightning-induced surges in building automation networks. IC Role / Device Role / Timing Role: Bidirectional protection not applicable here; SMBJ110 used in unidirectional configuration on common-mode rail or power-supply side. Use Value: 196 V clamping ensures transceiver ABSMAX ratings (typically ±15 V) are never exceeded on internal nodes via coupling paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ110A | Narrower VBR range (122–135 V vs. 122–149 V); lower clamping voltage (177 V vs. 196 V) | Better suited for tighter clamping margin requirements where protected IC absolute maximum is close to 196 V | Select SMBJ110A if clamping voltage headroom is critical; SMBJ110 offers broader VBR tolerance for cost-sensitive designs |
| SMCJ110 | Same VWM/VBR/VC specs but in larger DO-214AB (SMC) package; higher PPK = 1500 W | Used where higher surge energy handling is required (e.g., front-end AC/DC input stages) | Choose SMCJ110 only if board space allows larger footprint and 1500 W rating is needed; SMBJ110 fits compact PCB layouts |
Compared with SMBJ110A and SMCJ110, the SMBJ110 balances cost, size, and clamping performance for mid-tier surge protection - offering wider VBR tolerance than the 'A' variant and smaller footprint than the SMCJ series while maintaining full ISO 7637-2 compliance.
Availability
SMBJ110 is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and LED lighting applications requiring stable component supply and consistent surge immunity performance across production batches.
Supply support for SMBJ110 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, including TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 qualified products.
The SMBJ series was developed specifically for surface-mount surge protection in automotive and industrial environments, emphasizing low clamping ratio, high reliability under thermal cycling, and compatibility with lead-free reflow processes.
FAQ
What is the maximum clamping voltage of SMBJ110 under standard test conditions?
The SMBJ110 has a maximum clamping voltage (VC) of 196 V when subjected to a 10/1000 µs surge waveform at a peak impulse current (IPP) of 3.2 A. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ110 maintains this clamping performance across its specified operating temperature range, making it suitable for demanding applications like automotive power rail protection.
Is SMBJ110 suitable for bidirectional transient protection?
No, SMBJ110 is a unidirectional TVS diode and is not rated for bidirectional operation. For bipolar applications, Taiwan Semiconductor specifies parts with "C" or "CA" suffixes (e.g., SMBJ110C). Using SMBJ110 in reverse-biased configurations beyond its specified reverse standoff voltage may result in premature failure. Always verify polarity alignment in schematic design - the cathode band must face the protected line.
What is the leakage current specification for SMBJ110 at its working voltage?
The SMBJ110 exhibits a maximum blocking leakage current (ID) of 1 µA when biased at its rated working stand-off voltage (VWM) of 110 V. This low leakage ensures minimal power loss and avoids interference with upstream voltage regulation or sensing circuits. The specification holds at TA = 25°C and remains within acceptable bounds up to TJ = 125°C, supporting reliable operation in high-temperature environments.
Does SMBJ110 meet automotive transient immunity standards?
Yes, SMBJ110 meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b waveforms - covering key automotive transient scenarios including battery disconnection, inductive load switching, and capacitive coupling noise. Its 600 W peak pulse power rating and sub-1 ps response time enable effective suppression without additional passive filtering, simplifying layout and reducing BOM count in ECU and body control module designs.
What is the thermal resistance profile of SMBJ110, and how does it affect PCB layout?
SMBJ110 has a junction-to-case thermal resistance (RθJC) of 10 °C/W and junction-to-ambient (RθJA) of 55 °C/W under standard JEDEC test conditions. To maintain TJ ≤ 150 °C during repeated surges, PCB copper area connected to both terminals should be maximized - especially the cathode pad - to enhance heat dissipation. Avoid narrow traces or isolated pads, as thermal impedance directly impacts surge endurance and long-term reliability.
SMBJ110 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 196V
- Current - Peak Pulse (10/1000µs):
- 3.2A
- Power - Peak Pulse:
- 600W
- 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:
- DO-214AA (SMB)
SMBJ110 FAQ
1.How can I place an order for SMBJ110 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ110 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 SMBJ110 reliable?
The price and inventory of SMBJ110 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ110 is usually 5 days.
3.What payment methods are accepted for SMBJ110?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ110 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ110?
SMBJ110 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ110 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 SMBJ110?
For technical support, including SMBJ110 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ110 requirements.
6.How does Aetrix verify that SMBJ110 is sourced from the original manufacturer or authorized distributors?
All SMBJ110 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 SMBJ110 meets industry standards.
7.What is the process for return or replacement of SMBJ110?
All SMBJ110 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ110, 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 SMBJ110 part is unused and in its original packaging.
Return procedure for SMBJ110:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ110 Tags
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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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