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Taiwan Semiconductor Corporation SMBJ11H
- Part No.:
- SMBJ11H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ11H.pdf
- Description:
- 600W, 13.6V, 10%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,061
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Product details
Overview
SMBJ11H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 600W peak pulse power, 11V working stand-off voltage (VWM), and 20.1V maximum clamping voltage (VC) at 31A peak impulse current-designed to protect automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMBJ11H datasheet, SMBJ11H pinout, SMBJ11H application, or SMBJ11H equivalent, key selection criteria include clamping performance under 10/1000µs surge, AEC-Q101 qualification for automotive use, unidirectional polarity marking, and thermal resistance (RθJA = 55°C/W) for PCB-level thermal design.
Technical Context
The SMBJ11H operates as a unidirectional avalanche diode with glass-passivated junction, enabling sub-1ps response time and low leakage (<1µA at 11V). Its breakdown voltage is specified at 12.2–14.9V (IT = 1mA), ensuring reliable turn-on before system overvoltage damage occurs.
It meets ISO 7637-2 immunity requirements for automotive electronics and supports steady-state power dissipation of 3W at 25°C ambient, with junction temperature range from –55°C to +150°C-enabling deployment in under-hood and industrial control environments where thermal cycling and ESD robustness are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 11 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 12.2 V / 14.9 V @ IT = 1 mA - Ensures consistent avalanche initiation across production lot |
| VC @ IPP | 20.1 V @ 31 A (10/1000µs) - Limits downstream IC voltage stress during surge events |
| PPK | 600 W - Peak non-repetitive surge power handling capability per IEC 61000-4-5 |
| ID @ VWM | <1 µA - Minimal leakage current preserves low-power system standby integrity |
| RθJA | 55 °C/W - Enables thermal design margin estimation on standard FR-4 PCBs |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking for unidirectional polarity; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-impedance return path during clamping |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 12V rail); marked by band on package body |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
| Clamping voltage ≤20.1V @ 31A | Provides safe margin below 24V system IC absolute maximum ratings |
| Response time <1 ps | Engages before fast EFT or lightning-induced transients propagate into sensitive circuitry |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or special handling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery-supplied ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and bulk capacitor to clamp transients before LDO or MCU power pins. Use Value: Clamps ISO 7637-2 Pulse 5a (load dump) to ≤20.1V, preventing overvoltage failure of 24V-tolerant interface ICs. | Use Scenario: 4–20mA current loop transmitters in factory automation cabinets. IC Role / Device Role / Timing Role: Surge protection at analog front-end inputs subjected to field wiring ESD and inductive kickback. Use Value: Sub-1ps response limits transient energy coupled into precision op-amps and ADCs, preserving measurement accuracy. |
| LED Driver Overvoltage Clamp | DC-DC Converter Input Protection |
Use Scenario: Constant-current LED drivers powered from 12V/24V supplies in outdoor lighting. IC Role / Device Role / Timing Role: Primary transient clamp on high-side switch input to absorb inductive switching spikes from relay or solenoid loads. Use Value: 600W PPK rating sustains multiple 10/1000µs surges without degradation, extending driver lifetime. | Use Scenario: Buck converter input stage in PoE-powered edge devices. IC Role / Device Role / Timing Role: Front-end TVS on VIN pin to prevent latch-up or gate oxide damage in controller ICs during hot-swap or cable discharge events. Use Value: 1µA max leakage at 11V avoids loading low-quiescent current bias networks in always-on systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ11A | Lower VBR (12.2–13.5V) and lower VC (18.2V @ 34A); same package and PPK | Better clamping margin for 12V systems with tight voltage tolerances | Select SMBJ11A when downstream ICs require tighter clamping than 20.1V allows |
| SMCJ11H | Same VWM/VBR/VC specs but in larger DO-214AB (SMC) package; higher RθJA (35°C/W) | Higher thermal mass for repeated surge duty; requires larger PCB footprint | Choose SMCJ11H only if board layout permits larger package and thermal derating is needed |
Compared with SMBJ11A and SMCJ11H, the SMBJ11H offers balanced clamping performance and compact SMB footprint-ideal for space-constrained automotive modules where 20.1V clamping is acceptable and AEC-Q101 compliance is mandatory.
Availability
SMBJ11H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, LED lighting drivers, and DC-DC converter inputs requiring stable component supply with full traceability and lifecycle management.
Supply support for SMBJ11H 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 distribution and AEC-Q101 validation capability.
The SMBJH series was developed specifically for automotive and industrial transient suppression-emphasizing low clamping voltage, fast response, and robust packaging for harsh-environment deployment.
FAQ
What is the maximum clamping voltage of SMBJ11H and under what test condition?
The SMBJ11H has a maximum clamping voltage (VC) of 20.1 V, measured at a peak impulse current (IPP) of 31 A with a 10/1000 µs waveform per IEC 61000-4-5. This value ensures predictable overvoltage limiting during standardized surge events and is validated across production lots at TA = 25°C.
Is SMBJ11H suitable for automotive applications?
Yes, SMBJ11H is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity requirements. Its glass-passivated junction, –55°C to +150°C junction temperature range, and moisture sensitivity level 1 make it suitable for under-hood and body-control module deployments where SMBJ11H must survive thermal cycling and electrical transients.
What does the "H" suffix indicate in SMBJ11H?
The "H" suffix in SMBJ11H denotes high-temperature reliability grade per Taiwan Semiconductor's internal qualification-specifically confirming extended life testing at elevated temperature and humidity, and compliance with JESD22-A101 humidity resistance standards. It does not alter electrical parameters versus non-H variants.
How is polarity identified on the SMBJ11H package?
The SMBJ11H uses a cathode band marking on the DO-214AA (SMB) package body to identify the cathode terminal. This band aligns with the cathode lead-critical for correct unidirectional placement on PCBs where the cathode connects to the protected line and anode to ground or low-impedance return.
Does SMBJ11H meet RoHS and halogen-free requirements?
Yes, SMBJ11H is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound is UL 94V-0 rated, and terminals are matte tin-plated per J-STD-002, supporting lead-free reflow assembly while meeting environmental compliance mandates for automotive and industrial end equipment.
SMBJ11H 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:
- 20.1V
- Current - Peak Pulse (10/1000µs):
- 31A
- 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)
SMBJ11H FAQ
1.How can I place an order for SMBJ11H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ11H 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 SMBJ11H reliable?
The price and inventory of SMBJ11H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ11H is usually 5 days.
3.What payment methods are accepted for SMBJ11H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ11H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ11H?
SMBJ11H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ11H 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 SMBJ11H?
For technical support, including SMBJ11H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ11H requirements.
6.How does Aetrix verify that SMBJ11H is sourced from the original manufacturer or authorized distributors?
All SMBJ11H 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 SMBJ11H meets industry standards.
7.What is the process for return or replacement of SMBJ11H?
All SMBJ11H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ11H, 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 SMBJ11H part is unused and in its original packaging.
Return procedure for SMBJ11H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ11H Tags
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