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Taiwan Semiconductor Corporation SMBJ7.0AH
- Part No.:
- SMBJ7.0AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0AH.pdf
- Description:
- 600W, 8.2V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,103
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Product details
Overview
SMBJ7.0AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 600W peak pulse power, 7.0V working stand-off voltage, and 12.0V maximum clamping voltage at 200A peak impulse current; used for ESD and surge protection in automotive lighting and industrial control interfaces.
For engineers reviewing the SMBJ7.0AH datasheet, SMBJ7.0AH pinout, SMBJ7.0AH application, or SMBJ7.0AH equivalent, key selection criteria include clamping voltage (12.0V), breakdown voltage range (7.78–8.60V), leakage current (<1μA at 7.0V), AEC-Q101 qualification, and ISO 7637-2 compliance for automotive transients.
Technical Context
The SMBJ7.0AH employs a glass-passivated silicon junction optimized for fast response (<1.0ps) to transient overvoltages and low leakage (<1μA above 10V). It operates as a unidirectional clamp with cathode-band polarity marking and is rated for junction temperatures from –55°C to +150°C.
Its thermal design supports 10°C/W junction-to-case and 55°C/W junction-to-ambient resistance, enabling reliable operation under repetitive surge conditions when mounted on adequate copper area. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 7.78 V / 8.60 V - Breakdown occurs within this range at 10 mA test current |
| VC@IPP | 12.0 V - Clamps transients to ≤12.0 V at 200 A 10/1000 µs impulse |
| PPK | 600 W - Peak pulse power handling per single 10/1000 µs waveform |
| ID@VWM | <1 µA - Extremely low leakage ensures minimal standby power loss |
| TJ max | +150 °C - Enables use in under-hood automotive and high-temperature industrial environments |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, matte tin-plated leads, cathode indicated by band marking. Weight: 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path during clamping |
| Cathode | Reverse-biased clamping terminal | Connected to protected line; conducts only during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under humidity and thermal stress |
| Fast response time <1.0 ps | Clamps ESD events before sensitive IC inputs are damaged |
| ISO 7637-2 Pulse 1/2a/2b/3a/3b compliant | Protects against load dump, inductive switching, and battery disconnect transients in 12 V systems |
Applications
| Automotive Lighting Systems | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and CAN transceivers from load-dump surges in headlamp modules. IC Role / Device Role: Unidirectional TVS placed between supply rail and ground to clamp positive transients. Use Value: Limits voltage to 12.0 V during 200 A pulses, preventing latch-up or gate oxide damage in 5 V/3.3 V logic. | Use Scenario: Safeguarding digital input channels of programmable logic controllers exposed to field wiring transients. IC Role / Device Role: Standoff protector on 24 V DC input lines upstream of optocouplers or level shifters. Use Value: Withstands repeated ISO 7637-2 Pulse 1 (inductive kick) without degradation due to low leakage and robust thermal design. |
| Automotive Body Control Modules | Power Supply Input Protection |
Use Scenario: Shielding microcontroller GPIOs and LIN bus transceivers from ESD and relay-switching noise. IC Role / Device Role: Localized TVS at connector entry points on BCM PCBs. Use Value: Sub-1 ps response ensures clamping before 15 kV contact ESD reaches downstream circuitry. | Use Scenario: Front-end protection for DC-DC converters in telecom power supplies subjected to lightning-induced surges. IC Role / Device Role: Primary surge limiter on 12 V or 24 V input rails before filtering stages. Use Value: 600 W PPK rating allows absorption of multiple 10/1000 µs transients without failure under derated ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A | Same VWM (7.0 V), but higher VC@IPP (13.3 V vs. 12.0 V); no AEC-Q101 qualification | Lacks automotive qualification; suitable for commercial-grade industrial equipment only | Select SMBJ7.0A only if AEC-Q101 is not required and higher clamping voltage is acceptable |
| SAC7.0 | Lower PPK (400 W), same VWM (7.0 V), higher VC@IPP (13.0 V), also AEC-Q101 qualified | Reduced surge margin; appropriate where space constraints limit PCB copper area for heat dissipation | Choose SAC7.0 when footprint size is critical and 400 W peak power suffices for expected threat levels |
Compared with SMBJ7.0A and SAC7.0, the SMBJ7.0AH delivers tighter clamping (12.0 V), full AEC-Q101 validation, and higher surge energy handling-making it optimal for safety-critical automotive and harsh-environment industrial designs where voltage margin and reliability are non-negotiable.
Availability
SMBJ7.0AH is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC I/O protection, and body control module designs requiring stable component supply across extended production lifecycles.
Supply support for SMBJ7.0AH 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, serving global automotive, industrial, and consumer markets since 1979.
The SMBJH series was developed specifically for high-reliability transient suppression in automotive electronics, emphasizing AEC-Q101 compliance, ISO 7637-2 immunity, and robust thermal performance in compact SMB packages.
FAQ
What is the clamping voltage of SMBJ7.0AH at its rated peak pulse current?
The SMBJ7.0AH has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak impulse current (IPP) of 200 A using a 10/1000 µs waveform. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuits during surge events. The SMBJ7.0AH maintains this clamping performance consistently across its operational temperature range, supporting robust system-level EMC design.
Is SMBJ7.0AH qualified for automotive applications?
Yes, SMBJ7.0AH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements-making it suitable for automotive powertrain, body, and lighting systems. Its construction includes glass-passivated junctions, JESD201 Class 2 whisker resistance, and J-STD-020 Level 1 moisture sensitivity rating. These attributes ensure long-term reliability under automotive thermal, mechanical, and environmental stresses.
What is the polarity configuration of SMBJ7.0AH?
SMBJ7.0AH is a unidirectional TVS diode with cathode indicated by a band marking on the DO-214AA (SMB) package. It functions as a reverse-biased clamp: the cathode connects to the line being protected, and the anode connects to ground. During normal operation, it blocks up to 7.0 V; during overvoltage, it avalanches to clamp the line at ≤12.0 V. Polarity must be observed during PCB layout to ensure correct protection behavior.
How does SMBJ7.0AH compare to SMBJ7.0H in terms of electrical performance?
SMBJ7.0AH offers tighter breakdown voltage tolerance (7.78–8.60 V) versus SMBJ7.0H (7.78–9.51 V) and lower clamping voltage (12.0 V vs. 13.3 V at 200 A). Both share identical VWM (7.0 V), PPK (600 W), and package (DO-214AA). The "A" suffix denotes enhanced parameter consistency and is preferred for designs requiring precise clamping control and reduced variation across production lots.
What is the maximum leakage current specification for SMBJ7.0AH at its working stand-off voltage?
The SMBJ7.0AH exhibits a maximum blocking leakage current (ID) of less than 1 µA when biased at its working stand-off voltage (VWM) of 7.0 V. This ultra-low leakage minimizes quiescent power loss and avoids false triggering in high-impedance sensing or battery-powered circuits. The specification holds across the full operating temperature range (–55°C to +150°C), ensuring consistent performance in extreme environments.
SMBJ7.0AH 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 52A
- 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)
SMBJ7.0AH FAQ
1.How can I place an order for SMBJ7.0AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0AH 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 SMBJ7.0AH reliable?
The price and inventory of SMBJ7.0AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0AH is usually 5 days.
3.What payment methods are accepted for SMBJ7.0AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0AH?
SMBJ7.0AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0AH 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 SMBJ7.0AH?
For technical support, including SMBJ7.0AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0AH requirements.
6.How does Aetrix verify that SMBJ7.0AH is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0AH 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 SMBJ7.0AH meets industry standards.
7.What is the process for return or replacement of SMBJ7.0AH?
All SMBJ7.0AH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0AH, 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 SMBJ7.0AH part is unused and in its original packaging.
Return procedure for SMBJ7.0AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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