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Taiwan Semiconductor Corporation SMBJ9V0A
- Part No.:
- SMBJ9V0A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ9V0A.pdf
- Description:
- TVS DIODE 9VWM 15.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,670
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Product details
Overview
SMBJ9V0A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy ESD and surge protection in DC power rails and signal lines. It features a 9.0 V working stand-off voltage (VWM), 10.0–11.1 V breakdown voltage (VBR), 15.4 V maximum clamping voltage (VC) at 5 A peak impulse current, and 600 W peak pulse power rating with sub-1 ps response time.
For engineers reviewing the SMBJ9V0A datasheet, SMBJ9V0A pinout, SMBJ9V0A application, or SMBJ9V0A equivalent, this device is selected for automotive load-dump immunity, industrial I/O port protection, and USB/RS-485 interface surge hardening where low clamping voltage and fast transient suppression are critical.
Technical Context
The SMBJ9V0A employs a glass-passivated silicon junction optimized for low dynamic impedance and stable avalanche behavior under 10/1000 µs surge waveforms. Its unidirectional configuration provides forward conduction capability with VF = 3.5 V at 50 A, enabling use in both reverse-biased clamping and forward-biased crowbar-like protection schemes.
Thermal design is supported by RθJC = 10 °C/W and RθJA = 55 °C/W, allowing reliable operation up to TJ = 150 °C. It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements and complies with J-STD-020 moisture sensitivity level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 9.0 V - Maximum continuous DC or RMS voltage the device blocks without significant leakage. |
| VBR min/max | 10.0 / 11.1 V @ IT = 1 mA - Ensures predictable avalanche onset across production lot; tight 10% tolerance supports robust margining. |
| VC @ IPP | 15.4 V @ 5 A (10/1000 µs) - Limits downstream voltage stress during transients; enables safe operation of 12 V logic and analog ICs. |
| ID @ VWM | < 1 µA - Minimizes standby power loss and avoids false triggering in high-impedance sensing circuits. |
| PPK | 600 W - Sustains single-event surges up to 5 A × 15.4 V without failure; rated per ANSI/IEEE C62.35. |
| TJ max | +150 °C - Supports under-hood automotive and industrial environments with minimal derating. |
| Package | DO-214AA (SMB) - Standardized surface-mount footprint compatible with automated assembly and IPC-7351B land patterns. |
Pinout & Package
DO-214AA (SMB) package with cathode band marking on one end; two-terminal unidirectional configuration. Matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to system ground or return path; defines clamping reference point for overvoltage events. |
| Cathode | Protected line input | Connected to the line being protected (e.g., 12 V rail); conducts avalanche current to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term stability of VBR and low parameter drift over temperature and lifetime. |
| Sub-1 ps response time | Clamps ESD events before sensitive ICs experience latch-up or gate oxide damage. |
| ISO 7637-2 compliance | Validated for automotive load dump (Pulse 2b), battery disconnect (Pulse 3b), and coupled transients (Pulse 1/2a/3a). |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications. |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow; supports standard SMT assembly without special handling. |
Applications
| Automotive Power Rail Protection | Industrial I/O Port Hardening |
|---|---|
|
Use Scenario: Protecting 12 V supply lines in body control modules against ISO 7637-2 Pulse 2b (load dump) and Pulse 1 (inductive switching). IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and local regulator input to clamp transients below 16 V. Use Value: Prevents regulator shutdown or damage during alternator field collapse; maintains system uptime without adding series impedance. |
Use Scenario: Shielding RS-485 transceiver pins from EFT bursts and lightning-induced surges in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; SMBJ9V0A used on DC bias rail only-paired with bidirectional TVS on differential lines if needed. Use Value: Limits rail collapse during 4 kV EFT (IEC 61000-4-4) to <15.4 V, preserving transceiver functionality and data integrity. |
| USB Type-C VBUS Line Protection | LED Driver Supply Clamping |
|
Use Scenario: Safeguarding USB PD controller and power switch FETs on VBUS during hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Standoff-rated TVS on 5–20 V VBUS line; clamps 8 kV contact ESD (IEC 61000-4-2) within 1 ps. Use Value: Keeps VBUS voltage below 16 V during transients, preventing overvoltage lockout in buck-boost controllers and MOSFET gate oxide failure. |
Use Scenario: Suppressing inductive kickback from automotive LED headlamp drivers during PWM dimming transitions. IC Role / Device Role / Timing Role: Parallel-connected TVS across LED string supply to absorb energy from flyback diode recovery spikes. Use Value: Reduces peak overshoot from >30 V to ≤15.4 V, eliminating false overvoltage faults in LED driver ICs and extending MOSFET lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A (ON Semiconductor) | Identical VWM (9.0 V), VBR (10.0–11.1 V), VC (15.4 V), and package; minor marking code variation (KV vs. standard). | No functional difference; validated for same ISO 7637-2 pulses and thermal profiles. | Drop-in replacement with identical electrical and mechanical specs; suitable for dual-sourcing programs. |
| P6SMB9.0A (Littelfuse) | VWM = 9.0 V, VBR = 10.0–11.1 V, VC = 15.4 V, same DO-214AA package; meets UL 497B and AEC-Q200 Grade 2. | Includes AEC-Q200 qualification-required for automotive front-end modules where SMBJ9V0A lacks formal qualification. | Select P6SMB9.0A when automotive qualification documentation (test reports, PPAP) is mandatory; otherwise SMBJ9V0A suffices. |
Compared with SMBJ9V0A, SMBJ9.0A offers identical performance and sourcing flexibility, while P6SMB9.0A adds AEC-Q200 validation for mission-critical automotive subsystems-making it preferable where formal qualification outweighs cost or lead-time considerations.
Availability
SMBJ9V0A is available at Aetrix Electronics and suitable for automotive electronics, industrial I/O protection, and USB power delivery systems requiring stable component supply and full traceability.
Supply support for SMBJ9V0A 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power devices since 1979.
The SMBJ series was developed for high-reliability DC rail protection in automotive and industrial environments, emphasizing tight VBR tolerance, low clamping voltage, and robust surge endurance under harsh thermal and mechanical conditions.
FAQ
What is the maximum clamping voltage of SMBJ9V0A under a 10/1000 µs surge?
The SMBJ9V0A has a maximum clamping voltage (VC) of 15.4 V when subjected to a 5 A peak impulse current with a 10/1000 µs waveform. This value is guaranteed across temperature and process variation and ensures downstream 12 V ICs remain within safe operating limits during transient events. The SMBJ9V0A achieves this via low dynamic impedance and controlled avalanche characteristics.
Is SMBJ9V0A unidirectional or bidirectional?
SMBJ9V0A is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix and confirmed by its forward voltage specification (VF = 3.5 V at 50 A). It conducts in forward bias like a standard diode and clamps in reverse bias above VBR. For bidirectional protection, SMBJ9.0CA would be required-but SMBJ9V0A is intended for DC rail clamping where polarity is fixed.
Does SMBJ9V0A meet automotive surge immunity standards?
Yes, SMBJ9V0A meets ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a (battery feed interruption), Pulse 2b (load dump), and Pulses 3a/3b (capacitive coupling and ground bounce). Its 600 W rating and 15.4 V clamping enable compliance with these tests when properly mounted with low-inductance layout-though full system-level validation remains the designer's responsibility.
What is the leakage current of SMBJ9V0A at its working voltage?
At its 9.0 V working stand-off voltage (VWM), the SMBJ9V0A exhibits a maximum blocking leakage current (ID) of 1 µA at 25°C. This ultra-low leakage minimizes power loss in always-on systems and prevents false triggering in high-impedance monitoring circuits-critical for battery-powered and precision analog applications.
Can SMBJ9V0A be used in place of SMBJ9.0A?
Yes, SMBJ9V0A and SMBJ9.0A are functionally identical: both specify VWM = 9.0 V, VBR = 10.0–11.1 V, VC = 15.4 V, and DO-214AA packaging. The "V0A" and "9.0A" nomenclatures reflect regional or historical marking conventions-not electrical differences. SMBJ9V0A is fully interchangeable with SMBJ9.0A in layout, schematic, and performance.
SMBJ9V0A 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):
- 9V
- Voltage - Breakdown (Min):
- 10V
- Voltage - Clamping (Max) @ Ipp:
- 15.4V
- Current - Peak Pulse (10/1000µs):
- 39A
- 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)
SMBJ9V0A FAQ
1.How can I place an order for SMBJ9V0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ9V0A 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 SMBJ9V0A reliable?
The price and inventory of SMBJ9V0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ9V0A is usually 5 days.
3.What payment methods are accepted for SMBJ9V0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ9V0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ9V0A?
SMBJ9V0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ9V0A 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 SMBJ9V0A?
For technical support, including SMBJ9V0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ9V0A requirements.
6.How does Aetrix verify that SMBJ9V0A is sourced from the original manufacturer or authorized distributors?
All SMBJ9V0A 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 SMBJ9V0A meets industry standards.
7.What is the process for return or replacement of SMBJ9V0A?
All SMBJ9V0A units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ9V0A, 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 SMBJ9V0A part is unused and in its original packaging.
Return procedure for SMBJ9V0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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