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Taiwan Semiconductor Corporation SMBJ11AH
- Part No.:
- SMBJ11AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11AH.pdf
- Description:
- TVS DIODE 11VWM 18.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,777
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Product details
Overview
SMBJ11AH from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode with a 11V working stand-off voltage, 12.2–13.5V breakdown voltage at 1mA test current, and 18.2V maximum clamping voltage at 34A peak pulse current. It is AEC-Q101 qualified and designed for automotive ESD and load-dump protection in power supply rails and signal lines.
For engineers reviewing the SMBJ11AH datasheet, SMBJ11AH pinout, SMBJ11AH application, or SMBJ11AH equivalent, key selection criteria include its DO-214AA (SMB) package compatibility, 1μA max leakage at 11V, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and unidirectional polarity marking for correct PCB orientation.
Technical Context
The SMBJ11AH operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable breakdown behavior and low leakage. Its clamping response is sub-1ps, enabling effective suppression of fast transients such as ESD (IEC 61000-4-2) and electrical fast transients (IEC 61000-4-4).
Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, supporting operation up to +150°C junction temperature. It meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity, ensuring robustness in automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR @ IT=1mA | 12.2–13.5 V - Verified breakdown threshold ensures reliable turn-on during overvoltage events |
| VC @ IPP=34A | 18.2 V - Clamped voltage under 10/1000µs surge limits downstream IC stress |
| IPP (10/1000µs) | 34 A - Peak surge current handling capacity for automotive load-dump immunity |
| ID @ VWM | <1 µA - Ultra-low leakage preserves battery-powered system standby current |
| PPK | 600 W - Transient power dissipation rating validated per ANSI/IEEE C62.35 |
| TJ max | +150 °C - Junction temperature limit compatible with under-hood automotive environments |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking on one end; matte tin-plated leads compliant with J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path during clamping |
| Cathode | High-side connection point | Connected to protected line (e.g., 12V rail); marked with band for polarity verification |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term leakage stability across thermal cycles |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Sub-1ps response time | Clamps ESD events before sensitive logic inputs are damaged |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a/b) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges above 18.2V while remaining inert below 11V. Use Value: Prevents latch-up or permanent damage to voltage regulators and microcontrollers during vehicle ignition cycling. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from EFT bursts in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Low-capacitance (<100pF) TVS mounted directly at connector entry to shunt fast transients before reaching op-amp front-end. Use Value: Maintains signal integrity and avoids false triggering in 4–20mA or 0–10V sensor loops exposed to relay switching noise. |
| LED Lighting Driver Protection | USB-C Power Delivery Line Protection |
Use Scenario: Safeguarding constant-current LED drivers in automotive headlamps against inductive kickback from PWM dimming FETs. IC Role / Device Role / Timing Role: Placed across driver output to absorb energy from flyback voltage spikes during MOSFET turn-off. Use Value: Extends LED module lifetime by preventing overvoltage stress on output capacitors and driver ICs. | Use Scenario: Adding secondary-level surge protection on VBUS lines of USB-C receptacles in portable medical devices. IC Role / Device Role / Timing Role: Unidirectional TVS positioned after primary ESD array to handle higher-energy transients beyond IEC 61000-4-2 level 4. Use Value: Enables compliance with IEC 60601-1-2 ed.4 immunity requirements for connected healthcare equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A | Same VWM, VBR, and VC; not AEC-Q101 qualified; no ISO 7637-2 validation | Limited to commercial/industrial use; unsuitable for automotive OEM designs requiring qualification evidence | Select SMBJ11A only when AEC-Q101 and automotive standard compliance are not required. |
| SAC11 | Same DO-214AA package; lower PPK (400W); higher VC (20.0V @ 27A); no AEC-Q101 or ISO 7637-2 documentation | Marginally lower clamping performance; insufficient for ISO 7637-2 Pulse 5a (load dump) in 12V systems | Use SAC11 only in cost-sensitive non-automotive applications where 600W surge margin is not critical. |
Compared with SMBJ11A and SAC11, the SMBJ11AH delivers verified automotive-grade surge immunity, tighter VBR tolerance (12.2–13.5V vs. typical ±5%), and documented ISO 7637-2 compliance-making it the only option qualified for Tier-1 automotive power rail protection without derating or additional validation.
Availability
SMBJ11AH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED lighting drivers, and USB-C power delivery systems requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMBJ11AH 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 management components.
The SMBJH series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and high-power 10/1000µs surge capability in compact DO-214AA packaging.
FAQ
What is the polarity configuration of SMBJ11AH?
The SMBJ11AH is a unidirectional TVS diode with cathode marked by a band on the DO-214AA package body. When installed correctly-with cathode toward the protected line-the device remains non-conductive below 11V and clamps transients above its breakdown voltage. Reverse-biasing renders it ineffective for surge suppression.
Does SMBJ11AH meet ISO 7637-2 for automotive applications?
Yes, SMBJ11AH is explicitly validated for ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms per the official Taiwan Semiconductor datasheet (Version A2102). This certification confirms its suitability for protecting electronic control units against common automotive electrical disturbances including inductive switching and line impedance coupling.
What is the maximum clamping voltage of SMBJ11AH under surge conditions?
The SMBJ11AH has a maximum clamping voltage (VC) of 18.2 V at 34 A peak pulse current (10/1000µs waveform). This value is guaranteed across temperature and process variation, ensuring downstream circuitry sees no more than 18.2 V during standardized surge events.
Is SMBJ11AH compatible with lead-free reflow soldering processes?
Yes, SMBJ11AH uses matte tin-plated leads and meets J-STD-002 solderability requirements. Its DO-214AA package is rated for moisture sensitivity level 1 (per J-STD-020), allowing unlimited floor life and compatibility with standard Pb-free reflow profiles up to 260°C peak temperature.
How does SMBJ11AH differ from SMBJ11H in practical design use?
SMBJ11AH features tighter breakdown voltage tolerance (12.2–13.5 V vs. 12.2–14.9 V for SMBJ11H) and lower clamping voltage (18.2 V vs. 20.1 V), resulting in improved protection margin for 12V systems. Both share identical package, power rating, and AEC-Q101 qualification-but SMBJ11AH's tighter spec supports more robust design margins in safety-critical applications.
SMBJ11AH 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 11V
- Voltage - Breakdown (Min):
- 12.2V
- Voltage - Clamping (Max) @ Ipp:
- 18.2V
- Current - Peak Pulse (10/1000µs):
- 34A
- 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)
SMBJ11AH FAQ
1.How can I place an order for SMBJ11AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11AH 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 SMBJ11AH reliable?
The price and inventory of SMBJ11AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ11AH is usually 5 days.
3.What payment methods are accepted for SMBJ11AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11AH?
SMBJ11AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11AH 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 SMBJ11AH?
For technical support, including SMBJ11AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11AH requirements.
6.How does Aetrix verify that SMBJ11AH is sourced from the original manufacturer or authorized distributors?
All SMBJ11AH 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 SMBJ11AH meets industry standards.
7.What is the process for return or replacement of SMBJ11AH?
All SMBJ11AH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11AH, 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 SMBJ11AH part is unused and in its original packaging.
Return procedure for SMBJ11AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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