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Taiwan Semiconductor Corporation SMBJ30AH
- Part No.:
- SMBJ30AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30AH.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,873
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Product details
Overview
SMBJ30AH 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 48.4V maximum clamping voltage (VC) at 13.0A peak impulse current - designed for automotive-grade ESD and load-dump protection in power supply rails and I/O interfaces.
For engineers reviewing the SMBJ30AH datasheet, SMBJ30AH pinout, SMBJ30AH application, or SMBJ30AH equivalent, key selection criteria include its AEC-Q101 qualification, <1.0ps response time, <1μA leakage above 10V, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and unidirectional configuration with cathode band polarity marking.
Technical Context
The SMBJ30AH operates as a silicon avalanche diode with glass-passivated junction, enabling fast clamping during transients while maintaining low leakage (<1 μA at VWM = 30V). Its breakdown voltage range is 33.3–36.8V at 1mA test current, ensuring robust overvoltage margin above the 30V stand-off rating.
Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, supporting reliable operation up to +150°C junction temperature. It meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - critical for lead-free reflow assembly in automotive and industrial PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail protection threshold. |
| VBR min / max | 33.3 V / 36.8 V - Breakdown occurs within this range at 1 mA; ensures consistent turn-on margin above VWM. |
| VC @ IPP | 48.4 V at 13.0 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to sub-49V level. |
| PPK | 600 W - Peak pulse power handling per 10/1000 µs waveform; supports high-energy automotive transients. |
| ID @ VWM | <1 µA - Ultra-low leakage at rated stand-off voltage; prevents parasitic loading in high-impedance circuits. |
| Response time | <1.0 ps - Sub-picosecond junction response enables effective suppression of ESD and fast EFT events. |
| TJ max | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive environments. |
Pinout & Package
DO-214AA (SMB) surface-mount package with matte tin-plated leads, polarity indicated by cathode band on one end. Weight: ~0.090 g. Meets UL 94V-0 flammability and J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; forms clamping path during reverse transient. |
| Cathode | High-side transient input | Connected to protected line (e.g., 30V rail); avalanche conduction initiates here during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - enables use in ADAS, body control, and powertrain modules. |
| Glass passivated junction | Enhances long-term reliability and stability of breakdown voltage under thermal cycling and humidity exposure. |
| ISO 7637-2 compliant | Withstands standardized automotive load-dump (Pulse 5a/b) and coupled transient (Pulse 1/2a/2b/3a/3b) waveforms without degradation. |
| Moisture sensitivity Level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly lines without dry-pack handling. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives - supports green manufacturing and end-of-life compliance. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24V/30V battery-fed ECUs from load dump and alternator transients in passenger vehicles and commercial trucks. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges exceeding 30V. Use Value: Limits voltage seen by downstream PMICs and microcontrollers to ≤48.4V during 10/1000µs pulses, preventing latch-up or gate oxide damage. | Use Scenario: Safeguarding analog sensor inputs (e.g., pressure, temperature) connected to 30V field wiring in factory automation systems. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt ESD and inductive kickback before signal conditioning circuitry. Use Value: Sub-1ps response ensures clamping before sensitive op-amps or ADC front-ends are exposed to >2kV HBM transients. |
| LED Driver Supply Protection | Telecom Power Input Stage |
Use Scenario: Securing constant-current LED driver ICs powered from 30V bus in outdoor lighting fixtures subject to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive 600W pulses without degradation across 10,000+ cycles. Use Value: 600W PPK rating and 150°C TJ max enable sustained operation in thermally constrained outdoor enclosures. | Use Scenario: Front-end protection for 30V telecom power supplies receiving input from PoE++ or centralized DC distribution. IC Role / Device Role / Timing Role: Primary surge limiter on DC input rail, coordinated with upstream fuses and secondary filtering. Use Value: Low ID (<1 µA) avoids loading 30V standby rails; DO-214AA footprint allows dense layout in space-constrained telecom modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ30A | Same DO-214AC (SMA) package; slightly higher VC = 49.3V at 12.7A; VBR = 33.3–36.7V; no AEC-Q101 listing. | Not qualified for automotive; suitable for industrial/commercial where qualification is not mandated. | Select SMAJ30A only if AEC-Q101 is unnecessary and SMA footprint compatibility is required. |
| ON Semiconductor SMCJ30A | DO-214AB (SMC) package; larger footprint; VC = 48.4V at 13.0A; VBR = 33.3–36.7V; AEC-Q101 qualified. | Requires PCB layout change due to larger SMC package; better thermal dissipation (RθJA ≈ 35°C/W). | Choose SMCJ30A when higher thermal margin or legacy SMC footprint is prioritized over space constraints. |
Compared with SMAJ30A and SMCJ30A, SMBJ30AH uniquely combines AEC-Q101 qualification, DO-214AA (SMB) compactness, and identical clamping performance - making it optimal for space-limited automotive modules requiring zero-layout-change upgrades from legacy SMB packages.
Availability
SMBJ30AH is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and LED driver supply stabilization requiring stable component supply and full traceability.
Supply support for SMBJ30AH 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 automotive-qualified components.
The SMBJH series was developed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - emphasizing fast response, low leakage, and robust thermal performance in compact SMB packages.
FAQ
What is the polarity configuration of SMBJ30AH?
SMBJ30AH is a unidirectional TVS diode, with cathode marked by a band on the package. It conducts only during reverse-biased overvoltage events - ideal for protecting positive-rail circuits referenced to ground. The device does not conduct in forward bias except during specified surge conditions, and its forward voltage is not characterized for continuous conduction.
Does SMBJ30AH meet automotive qualification standards?
Yes, SMBJ30AH is AEC-Q101 qualified and tested per the full stress test schedule including HTGB, AC/DC life test, temperature cycling, and mechanical shock. It also complies with ISO 7637-2 Pulse 1/2a/2b/3a/3b for electrical transient immunity - confirming suitability for automotive power and signal line protection per OEM requirements.
What is the maximum clamping voltage of SMBJ30AH under surge conditions?
The maximum clamping voltage of SMBJ30AH is 48.4 V at 13.0 A peak impulse current (IPP), measured using the standardized 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events.
Can SMBJ30AH be used in bidirectional applications?
No - SMBJ30AH is strictly unidirectional. For bidirectional protection, Taiwan Semiconductor offers the SMBJ30CAH variant (with CAH suffix), which features symmetrical breakdown in both directions and identical VWM/VBR/VC ratings. Using SMBJ30AH in bidirectional configurations risks failure during positive-going transients on the anode side.
What packaging and reel quantity is available for SMBJ30AH?
SMBJ30AH is supplied in DO-214AA (SMB) package on 3,000-piece tape-and-reel format, conforming to EIA-481 standards. The reel includes full traceability data, date code (YW), factory code (F), and green compound marking (G), meeting J-STD-020 Level 1 moisture sensitivity requirements for direct SMT placement without baking.
SMBJ30AH 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:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 13A
- 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)
SMBJ30AH FAQ
1.How can I place an order for SMBJ30AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30AH 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 SMBJ30AH reliable?
The price and inventory of SMBJ30AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30AH is usually 5 days.
3.What payment methods are accepted for SMBJ30AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30AH?
SMBJ30AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30AH 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 SMBJ30AH?
For technical support, including SMBJ30AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30AH requirements.
6.How does Aetrix verify that SMBJ30AH is sourced from the original manufacturer or authorized distributors?
All SMBJ30AH 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 SMBJ30AH meets industry standards.
7.What is the process for return or replacement of SMBJ30AH?
All SMBJ30AH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30AH, 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 SMBJ30AH part is unused and in its original packaging.
Return procedure for SMBJ30AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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