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Taiwan Semiconductor Corporation SMBJ110CAH
- Part No.:
- SMBJ110CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ110CAH.pdf
- Description:
- TVS DIODE 110VWM 177VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,292
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Product details
Overview
SMBJ110CAH from Taiwan Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection in automotive and industrial power rails. It features a 110 V working stand-off voltage (VWM), 122–135 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 sub-1 ps response time.
For engineers reviewing the SMBJ110CAH datasheet, SMBJ110CAH pinout, SMBJ110CAH application, or SMBJ110CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1 µA at 110 V), and thermal robustness up to 150°C junction temperature.
Technical Context
The SMBJ110CAH implements a glass-passivated silicon junction optimized for fast transient suppression in bidirectional signal and power lines. Its unidirectional counterpart (SMBJ110CH) shares identical VWM and VBR ranges but differs in polarity marking and forward conduction behavior - the CAH variant enables symmetrical clamping in both directions without external series diodes.
Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, supporting reliable operation under repetitive surge conditions when mounted on minimum 1-inch2 copper area. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements for automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VBR min / max | 122 V / 135 V @ 1 mA - Confirmed breakdown threshold range ensuring predictable turn-on during transients |
| VC @ IPP | 196 V @ 3.2 A (10/1000 µs) - Clamping voltage limits downstream IC stress to safe levels during ISO 7637-2 Pulse 2b events |
| PPK | 600 W - Peak surge energy handling capacity compatible with automotive load-dump and inductive switching threats |
| IR @ VWM | <1 µA - Negligible standby current enabling use in always-on battery-connected circuits |
| TJ max | +150°C - Junction temperature rating supporting under-hood automotive deployment without derating |
| Package | DO-214AA (SMB) - Standard surface-mount outline with 0.090 g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AA (SMB) package: Cathode band denotes polarity; for bidirectional SMBJ110CAH, the band identifies the common terminal - both leads function identically as symmetrical clamping terminals with no anode/cathode distinction in normal operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (marked side) | Clamping terminal (bidirectional) | Acts as cathode during positive transients and anode during negative transients - enables full-cycle protection without external diode pairing |
| Cathode (unmarked side) | Clamping terminal (bidirectional) | Functions symmetrically with marked side - identical VBR, VC, and IPP characteristics in either direction per datasheet Table "Devices for Bipolar Applications" |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) waveforms without degradation |
| Glass passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift in harsh environments |
| Sub-1 ps response time | Clamps transients before sensitive logic or analog circuitry can be damaged - critical for CAN, LIN, and sensor interface protection |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V/24 V vehicle battery line exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail to clamp ±200 V transients within 196 V ceiling. Use Value: Prevents latch-up or permanent damage to MCU power management ICs and CAN transceivers during cold-crank or jump-start events. |
Use Scenario: 4–20 mA current loop or RS-485 bus connected to field sensors in factory automation. IC Role / Device Role / Timing Role: Parallel-connected clamping device absorbing EFT bursts and lightning-induced surges on differential pairs. Use Value: Maintains signal integrity by limiting common-mode voltage excursion to <200 V, preserving isolation barrier integrity and ADC input safety. |
| LED Lighting Driver Protection | Automotive ECU Input Protection |
Use Scenario: Constant-current LED driver subjected to inductive kickback from relay-controlled loads. IC Role / Device Role / Timing Role: TVS placed across MOSFET drain-source to absorb 600 W inductive energy spikes. Use Value: Eliminates need for snubber networks while maintaining >95% driver efficiency and extending MOSFET lifetime. |
Use Scenario: Digital input pins of engine control unit exposed to wiring harness ESD and cable discharge events. IC Role / Device Role / Timing Role: Localized clamping at connector entry point to limit transient voltage before reaching GPIO protection diodes. Use Value: Reduces system-level failure rate by lowering peak voltage seen by internal ESD structures from >30 kV to <200 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ110CA | Same VWM (110 V), slightly higher VC (200 V @ 3.2 A), identical DO-214AA package and AEC-Q101 qualification | Marginally lower clamping ratio (VC/VBR ≈ 1.57 vs 1.55), suitable where 4 V higher clamping is acceptable | Select SMAJ110CA if sourcing flexibility across dual suppliers is prioritized and 196 → 200 V clamping margin is design-allowable |
| ON Semiconductor 1.5SMC110CA | Higher PPK (1500 W), larger DO-214AB (SMC) package, same VWM/VBR range but 20% higher thermal resistance (RθJA = 67°C/W) | Requires PCB layout change; better for single-event high-energy threats but less suited for space-constrained automotive modules | Choose 1.5SMC110CA only when surge energy exceeds 600 W and board area permits larger footprint |
Compared with SMBJ110CAH, SMAJ110CA offers identical form-factor and qualification with minimal clamping trade-off, while 1.5SMC110CA delivers higher power handling at the cost of size and thermal performance - making SMBJ110CAH optimal for compact, thermally constrained AEC-Q101 designs requiring precise 196 V clamping.
Availability
SMBJ110CAH is available at Aetrix Electronics and suitable for automotive infotainment power rails, industrial sensor interfaces, LED lighting drivers, and ECU digital inputs requiring stable component supply across extended temperature and surge environments.
Supply support for SMBJ110CAH 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, TVS diodes, and rectifiers with global automotive and industrial certifications.
The SMBJH series was developed specifically for AEC-Q101-compliant transient suppression in automotive power distribution and body electronics, emphasizing low clamping voltage, fast response, and robust thermal performance in compact SMB packages.
FAQ
What is the maximum clamping voltage of SMBJ110CAH under standard 10/1000 µs surge conditions?
The SMBJ110CAH has a maximum clamping voltage (VC) of 196 V when subjected to a 3.2 A peak impulse current with a 10/1000 µs waveform, as specified in the Electrical Specifications table on page 3 of the Taiwan Semiconductor SMBJH Series datasheet Version A2102. This value ensures downstream components remain within safe operating voltage limits during ISO 7637-2 Pulse 2b events.
Is SMBJ110CAH suitable for bidirectional signal line protection such as CAN or LIN buses?
Yes, SMBJ110CAH is explicitly designed for bidirectional applications, as confirmed by its "CAH" suffix and the "Devices for Bipolar Applications" section stating electrical characteristics apply in both directions. Its symmetrical clamping behavior, sub-1 ps response, and low capacitance make it appropriate for protecting differential automotive data lines against ESD and EFT without distorting signal integrity.
Does SMBJ110CAH meet AEC-Q101 stress test requirements for automotive use?
Yes, SMBJ110CAH is AEC-Q101 qualified per the Features section of the datasheet. It undergoes standardized stress tests including high-temperature reverse bias (HTRB), temperature cycling, and mechanical shock, validating its reliability for under-hood and chassis-mounted automotive electronics where ambient temperatures reach +125°C and vibration exposure is severe.
What is the leakage current specification for SMBJ110CAH at its rated working voltage?
SMBJ110CAH exhibits a maximum blocking leakage current (ID) of 1 µA at its 110 V working stand-off voltage (VWM), measured at TA = 25°C. This ultra-low leakage supports use in always-on systems such as automotive telematics modules and battery monitoring circuits where standby power budget is tightly constrained.
How does the thermal resistance of SMBJ110CAH affect its surge handling capability in real-world PCB layouts?
SMBJ110CAH has a junction-to-ambient thermal resistance (RθJA) of 55°C/W, meaning each watt of sustained power dissipation raises the junction temperature by 55°C above ambient. In practice, this allows full 600 W surge capability only for short-duration pulses; for repetitive surges, PCB copper area and airflow must be optimized to maintain TJ ≤ 150°C, as shown in Figure 2 (Pulse Derating Curve).
SMBJ110CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 177V
- Current - Peak Pulse (10/1000µs):
- 3.5A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ110CAH FAQ
1.How can I place an order for SMBJ110CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ110CAH 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 SMBJ110CAH reliable?
The price and inventory of SMBJ110CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ110CAH is usually 5 days.
3.What payment methods are accepted for SMBJ110CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ110CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ110CAH?
SMBJ110CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ110CAH 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 SMBJ110CAH?
For technical support, including SMBJ110CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ110CAH requirements.
6.How does Aetrix verify that SMBJ110CAH is sourced from the original manufacturer or authorized distributors?
All SMBJ110CAH 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 SMBJ110CAH meets industry standards.
7.What is the process for return or replacement of SMBJ110CAH?
All SMBJ110CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ110CAH, 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 SMBJ110CAH part is unused and in its original packaging.
Return procedure for SMBJ110CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ110CAH Tags
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