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Taiwan Semiconductor Corporation SMBJ30H
- Part No.:
- SMBJ30H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30H.pdf
- Description:
- 600W, 37V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:8,097
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Product details
Overview
SMBJ30H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 600W peak pulse power, 30V working stand-off voltage (VWM), and 53.5V maximum clamping voltage (VC) at 11.7A 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 SMBJ30H datasheet, SMBJ30H pinout, SMBJ30H application, or SMBJ30H equivalent, key selection considerations include its AEC-Q101 qualification, <1.0ps response time, <1μA leakage above 10V, glass-passivated junction, and compliance with RoHS and halogen-free standards per IEC 61249-2-21.
Technical Context
The SMBJ30H operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 33.3–40.7V breakdown range (VBR @ IT = 1mA). It clamps transient energy within 53.5V at 11.7A (10/1000µs waveform), limiting stress on downstream ICs and power stages.
Its thermal design supports continuous operation up to TJ = 150°C, with RθJA = 55°C/W and RθJC = 10°C/W. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - enabling robust reflow compatibility in automated SMT assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 33.3 V / 40.7 V @ 1 mA - Confirmed breakdown threshold range for reliable turn-on margin |
| VC @ IPP | 53.5 V @ 11.7 A (10/1000 µs) - Clamped voltage protecting downstream components under worst-case surge |
| PPK | 600 W - Peak transient power handling capability per single non-repetitive event |
| ID @ VWM | <1 µA - Low leakage ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150 °C - Enables use in under-hood automotive and industrial environments without derating |
| Response time | <1.0 ps - Sub-picosecond switching ensures protection before ESD or fast transients damage sensitive nodes |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability; polarity indicated by molded cathode band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; defines clamping reference point |
| Cathode | Protected line input | Connected to the line being protected (e.g., 12V/24V rail); conducts during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) immunity requirements |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow - supports standard SMT production without special handling |
| Halogen-free construction | Complies with IEC 61249-2-21 - eliminates brominated flame retardants for safer end-of-life processing |
Applications
| Automotive Power Rail Protection | Industrial DC Power Input Protection |
|---|---|
Use Scenario: 12V/24V battery-fed ECUs exposed to load dump and alternator transients in vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges before they reach PMICs or microcontrollers. Use Value: Limits clamping voltage to 53.5V, well below typical 60V-rated input stages, preventing latch-up or gate oxide damage. | Use Scenario: 24V/48V industrial PLC power inputs subjected to inductive switching noise from solenoids and relays. IC Role / Device Role / Timing Role: Standoff protector on main DC input, absorbing repetitive 600W pulses without degradation. Use Value: With <1µA leakage at 30V, it avoids loading precision sensing circuits while delivering sub-ns response to fast transients. |
| LED Driver Overvoltage Clamp | Automotive CAN Bus Line Protection |
Use Scenario: Constant-current LED drivers in headlamps or signage where open-circuit faults generate high-voltage spikes. IC Role / Device Role / Timing Role: Parallel-connected TVS across output terminals to absorb inductive kickback from driver FETs. Use Value: 53.5V clamping ensures LED string and driver IC remain within safe operating area during fault conditions. | Use Scenario: CAN-H/CAN-L lines in body control modules exposed to EFT and ESD per ISO 10605. IC Role / Device Role / Timing Role: Paired unidirectional SMBJ30H devices (one per line) referenced to ground, suppressing common-mode transients. Use Value: Fast <1.0ps response prevents bit errors during high-speed CAN FD communication (up to 5 Mbps). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ30A | Same DO-214AC (SMA) package; 33.3–40.7V VBR; 53.3V VC @ 11.7A; 600W PPK; AEC-Q101 qualified | Slightly smaller footprint (SMA vs SMB); lower thermal mass may affect sustained surge handling | Preferred where board space is constrained and thermal derating is managed via layout |
| Vishay SMF30A | DO-219AB (SOD-123FL) package; 33.3–40.7V VBR; 53.3V VC @ 11.7A; 400W PPK; AEC-Q101 qualified | Lower peak power rating (400W vs 600W); smaller package limits heat dissipation under repeated surges | Acceptable for lighter-duty EFT/ESD protection but not recommended for ISO 7637-2 Pulse 1 load dump |
Compared with SMAJ30A and SMF30A, the SMBJ30H offers superior thermal performance (RθJA = 55°C/W) and higher surge robustness in the larger DO-214AA package - making it optimal for automotive power rail protection where sustained energy absorption is critical.
Availability
SMBJ30H is available at Aetrix Electronics and suitable for automotive ECU design, industrial power supply input protection, and LED driver overvoltage clamping requiring stable component supply across multi-year production cycles.
Supply support for SMBJ30H 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, MOSFETs, and power management components.
The SMBJH series was developed specifically for AEC-Q101-compliant automotive transient suppression, emphasizing high-energy clamping, low leakage, and process-controlled glass passivation for long-term reliability in harsh environments.
FAQ
What is the breakdown voltage range of SMBJ30H?
The SMBJ30H has a minimum breakdown voltage (VBR) of 33.3 V and a maximum of 40.7 V, measured at 1 mA test current per ANSI/IEEE C62.35. This range ensures consistent turn-on behavior across production lots while accommodating manufacturing tolerances - critical for predictable clamping in automotive power systems where overvoltage margins must be tightly controlled. The SMBJ30H maintains this specification across its full operating temperature range.
Is SMBJ30H suitable for bidirectional transient protection?
No, SMBJ30H is a unidirectional TVS diode and is not rated for bidirectional operation. For bipolar applications, Taiwan Semiconductor specifies part numbers with "CH" or "CAH" suffixes (e.g., SMBJ30CH). Using SMBJ30H in reverse-biased configurations risks permanent damage due to lack of symmetrical avalanche characteristics. Always verify polarity alignment during PCB layout - the cathode band must face the protected line.
Does SMBJ30H meet automotive qualification standards?
Yes, SMBJ30H is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its construction includes glass passivation, JESD201 Class 2 whisker resistance, and J-STD-020 Level 1 moisture sensitivity - all validated for under-hood automotive deployment. TSC provides full qualification reports upon request for OEM release documentation.
What is the maximum clamping voltage of SMBJ30H under surge conditions?
The SMBJ30H clamps to a maximum of 53.5 V when subjected to an 11.7 A peak impulse current with a 10/1000 µs waveform. This value is guaranteed across all units and represents the upper limit of voltage seen by downstream circuitry during worst-case transients - enabling designers to verify that protected ICs remain within their absolute maximum ratings. Clamping performance is stable over temperature and lifetime.
Can SMBJ30H be used in industrial power supplies?
Yes, SMBJ30H is widely deployed in industrial 24V/48V DC power inputs for PLCs, motor drives, and HMIs. Its 600W peak power rating, 150°C junction rating, and <1 µA leakage at 30V make it suitable for high-reliability applications where thermal stability and low standby loss are essential. The DO-214AA package supports automated placement and withstands standard lead-free reflow profiles without degradation.
SMBJ30H 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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 53.5V
- Current - Peak Pulse (10/1000µs):
- 11.7A
- 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)
SMBJ30H FAQ
1.How can I place an order for SMBJ30H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30H 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 SMBJ30H reliable?
The price and inventory of SMBJ30H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30H is usually 5 days.
3.What payment methods are accepted for SMBJ30H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30H?
SMBJ30H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30H 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 SMBJ30H?
For technical support, including SMBJ30H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30H requirements.
6.How does Aetrix verify that SMBJ30H is sourced from the original manufacturer or authorized distributors?
All SMBJ30H 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 SMBJ30H meets industry standards.
7.What is the process for return or replacement of SMBJ30H?
All SMBJ30H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30H, 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 SMBJ30H part is unused and in its original packaging.
Return procedure for SMBJ30H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30H Tags
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