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Taiwan Semiconductor Corporation SMB10J33CAH
- Part No.:
- SMB10J33CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J33CAH.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,105
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Product details
Overview
SMB10J33CAH from Taiwan Semiconductor is a bidirectional 33 V standoff transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 1000 W peak pulse power, 53.3 V clamping voltage at 18.8 A peak pulse current, and AEC-Q101 qualified for automotive electronics protection against ISO 7637-2 transients.
For engineers reviewing the SMB10J33CAH datasheet, SMB10J33CAH pinout, SMB10J33CAH application, or SMB10J33CAH equivalent, key selection criteria include bidirectional clamping capability, 33 V working voltage, 1000 W surge rating, DO-214AA thermal performance (RθJA = 100 °C/W), and compliance with automotive ESD/EMI immunity standards.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, enabling robust protection of differential signal lines or AC-coupled circuits without polarity dependency. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 µA at 33 V).
The device delivers fast transient response (<1.0 ps) and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements. Thermal design is supported by RθJL = 20 °C/W and RθJA = 100 °C/W ratings under standard PCB mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 33 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min / max | 36.7 V / 40.6 V - Verified breakdown range at 1 mA test current; ensures consistent turn-on threshold |
| VC @ IPPM | 53.3 V - Clamping voltage at 18.8 A peak pulse current; defines worst-case voltage seen by protected IC |
| PPK | 1000 W - Peak pulse power handling per 1 ms waveform; supports high-energy automotive load dump events |
| TJ max | +175 °C - Maximum junction temperature; enables operation in under-hood automotive environments |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; informs minimum copper area required for thermal management |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; dual-terminal configuration optimized for automated placement and reflow soldering. Matte tin-plated leads meet J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Bidirectional) | Transient conduction path | No polarity distinction - terminals conduct equally in either direction during overvoltage events |
| Cathode Band Marking | Visual polarity indicator | Present on unidirectional variants only; absent on SMB10J33CAH due to bidirectional symmetry |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive-grade deployment including temperature cycling, humidity bias, and mechanical shock testing |
| ISO 7637-2 compliance | Guaranteed immunity to standardized automotive transient pulses (Pulse 1/2a/2b/3a/3b) without circuit degradation |
| Glass-passivated junction | Stable VBR tolerance and low leakage (<1 µA) across temperature and lifetime |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow; simplifies SMT line logistics |
Applications
| Automotive Lighting Systems | Infotainment Power Rails |
|---|---|
Use Scenario: Protecting LED driver ICs and CAN transceivers from load dump and inductive switching spikes in headlamp/tail lamp modules. IC Role / Device Role: Bidirectional clamping element placed across power input rails upstream of DC-DC converters. Use Value: Limits transient voltage to ≤53.3 V during 1000 W surges, preventing latch-up or gate oxide damage in 33 V-rated downstream ICs. | Use Scenario: Safeguarding USB-C PD controllers and audio amplifiers from ESD and battery reversal transients in center-stack displays. IC Role / Device Role: Low-leakage (<1 µA) bidirectional shunt protector on 12 V supply inputs. Use Value: Maintains system uptime by clamping fast EFT events (<1 ps response) while avoiding false triggering during normal 33 V rail operation. |
| Body Control Module (BCM) Inputs | Electric Power Steering (EPS) Sensors |
Use Scenario: Shielding LIN bus transceivers and microcontroller GPIOs from wiring harness coupling noise in door modules. IC Role / Device Role: Differential-line protector between LIN PHY and MCU pins. Use Value: Symmetric clamping ensures equal protection for both signal polarities without external biasing components. | Use Scenario: Protecting Hall-effect position sensors and motor phase current monitors from inductive kickback in EPS motor drivers. IC Role / Device Role: High-energy (1000 W) transient absorber on 12 V sensor supply and analog feedback lines. Use Value: Withstands repetitive 8.3 ms half-sine surges up to 100 A IFSM, ensuring long-term reliability in safety-critical steering systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Same DO-214AA package, identical VWM/VC specs, but not AEC-Q101 qualified | Limited to industrial/commercial use; unsuitable for automotive production | Select SMB10J33CAH when automotive qualification and ISO 7637-2 compliance are mandatory |
| SAC33 | Smaller SOD-123FL package, lower PPK (600 W), higher VC (60 V), same VWM | Insufficient energy handling for load dump; suitable only for ESD-level transients | Choose SMB10J33CAH where 1000 W surge margin and 53.3 V clamping are required |
Compared with SMBJ33CA and SAC33, SMB10J33CAH uniquely combines AEC-Q101 qualification, 1000 W peak power, and 53.3 V clamping in DO-214AA - making it the only option qualified for automotive load dump and ISO 7637-2 Pulse 5a compliance.
Availability
SMB10J33CAH is available at Aetrix Electronics and suitable for automotive lighting systems, infotainment power rails, and body control module (BCM) inputs requiring stable component supply with full traceability and lifecycle support.
Supply support for SMB10J33CAH 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 SMB10J series was designed specifically for AEC-Q101-compliant transient protection in harsh automotive environments, emphasizing high surge robustness, low clamping voltage, and reliable bidirectional operation.
FAQ
What does the 'CAH' suffix indicate in SMB10J33CAH?
The 'CAH' suffix denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and halogen-free construction (H). Unlike unidirectional variants ending in 'AH', SMB10J33CAH provides symmetrical clamping for both positive and negative transients without polarity constraints - critical for protecting AC-coupled or differential interfaces in automotive systems.
Is SMB10J33CAH compatible with lead-free reflow soldering processes?
Yes, SMB10J33CAH features matte tin-plated leads compliant with J-STD-002 and is rated for moisture sensitivity level 1, allowing direct placement into standard lead-free reflow profiles (peak temperature up to 260 °C) without pre-baking. Its DO-214AA package is qualified for automated SMT assembly with no special handling requirements.
How does SMB10J33CAH differ from SMBJ33CA in practical design use?
SMB10J33CAH differs from SMBJ33CA primarily in AEC-Q101 qualification and ISO 7637-2 compliance. While both share identical electrical specs and DO-214AA packaging, only SMB10J33CAH is validated for automotive under-hood environments and certified for Pulse 1/2a/2b/3a/3b testing - making it mandatory for Tier 1 automotive designs where SMBJ33CA would fail qualification audits.
What is the maximum peak pulse current SMB10J33CAH can handle at 33 V standoff?
At its 33 V working voltage, SMB10J33CAH handles up to 18.8 A peak pulse current (IPPM) while clamping to 53.3 V, corresponding to its 1000 W peak pulse power rating under the standard 10/1000 µs waveform. This value is confirmed in the manufacturer's electrical specifications table and validated per JEDEC test methods.
Can SMB10J33CAH be used in place of a unidirectional TVS like SMB10J33AH?
No - SMB10J33CAH is bidirectional and lacks polarity marking, while SMB10J33AH is unidirectional with a cathode band. Substituting SMB10J33CAH for SMB10J33AH may cause unintended conduction in DC-biased circuits. Use SMB10J33CAH only where symmetrical clamping is required, such as across differential buses or AC signal lines.
SMB10J33CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMB10J
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 18.8A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J33CAH FAQ
1.How can I place an order for SMB10J33CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J33CAH 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 SMB10J33CAH reliable?
The price and inventory of SMB10J33CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J33CAH is usually 5 days.
3.What payment methods are accepted for SMB10J33CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J33CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J33CAH?
SMB10J33CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J33CAH 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 SMB10J33CAH?
For technical support, including SMB10J33CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J33CAH requirements.
6.How does Aetrix verify that SMB10J33CAH is sourced from the original manufacturer or authorized distributors?
All SMB10J33CAH 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 SMB10J33CAH meets industry standards.
7.What is the process for return or replacement of SMB10J33CAH?
All SMB10J33CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J33CAH, 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 SMB10J33CAH part is unused and in its original packaging.
Return procedure for SMB10J33CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J33CAH Tags
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