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Taiwan Semiconductor Corporation SMBJ7.0H
- Part No.:
- SMBJ7.0H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0H.pdf
- Description:
- 600W, 8.6V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,049
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Product details
Overview
SMBJ7.0H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for automotive-grade ESD and surge protection. It features a 7.0 V working stand-off voltage (VWM), 7.78–9.51 V breakdown voltage (VBR), 13.3 V maximum clamping voltage (VC) at 200 A peak pulse current, and 600 W peak pulse power rating per 10/1000 µs waveform - deployed in automotive lighting control modules to protect CAN transceivers from load-dump-induced transients.
For engineers reviewing the SMBJ7.0H datasheet, SMBJ7.0H pinout, SMBJ7.0H application, or SMBJ7.0H equivalent, key selection criteria include clamping voltage margin relative to IC VCC rails, leakage current below 1 µA at 7.0 V, AEC-Q101 qualification status, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics robustness.
Technical Context
The SMBJ7.0H employs a glass-passivated silicon junction optimized for fast response (<1.0 ps) and low capacitance, enabling effective suppression of ESD events and electrical fast transients without signal distortion. Its unidirectional configuration provides forward conduction only during reverse overvoltage conditions, with VF = 3.5 V at 50 A IFSM.
Thermal performance is defined by RθJC = 10 °C/W and RθJA = 55 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, ensuring reliability in reflow-soldered automotive PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before clamping begins; must exceed system nominal rail voltage (e.g., 5 V or 6.5 V logic supply) to avoid leakage-induced power loss. |
| VBR @ IT=10 mA | 7.78–9.51 V - Breakdown threshold range; ensures reliable turn-on above VWM while maintaining margin against false triggering during normal operation. |
| VC @ IPP=200 A | 13.3 V - Clamped voltage under 10/1000 µs surge; defines maximum stress imposed on protected downstream ICs (e.g., microcontroller I/O pins). |
| ID @ VWM | <1 µA - Reverse leakage at rated stand-off voltage; critical for low-power battery-backed systems where standby current must remain sub-microamp. |
| PPK | 600 W - Peak pulse power handling per standard 10/1000 µs waveform; supports immunity to ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2b (battery disconnect). |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments without thermal derating penalties. |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking for unidirectional polarity. Matte tin-plated leads comply with J-STD-002 solderability requirements and UL 94V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side return path; conducts during reverse-transient clamping when cathode is at higher potential. |
| Cathode | Protected line connection | Connected to the line being protected (e.g., CAN_H or LIN bus); reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling, mechanical shock, and humidity testing per JEDEC standards. |
| Clamping voltage ≤13.3 V at 200 A | Ensures protected ICs (e.g., SBCs or CAN transceivers) experience no more than 13.3 V during worst-case load dump, preserving safe operating area. |
| Response time <1.0 ps | Enables suppression of nanosecond-scale ESD events (IEC 61000-4-2) before sensitive gate oxides are damaged. |
| ISO 7637-2 compliant | Meets Pulse 1 (inductive flyback), Pulse 2a (supply interruption), Pulse 2b (battery disconnection), and Pulse 3a/3b (switching transients) test profiles. |
Applications
| Automotive Lighting Control | CAN Bus Node Protection |
|---|---|
|
Use Scenario: Protecting LED driver ICs and microcontrollers in headlamp control units exposed to load-dump transients during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground, clamping surges within 1 ns to prevent latch-up or gate oxide rupture. Use Value: Limits peak voltage to 13.3 V during 200 A 10/1000 µs pulses, keeping protected 12 V-rated drivers within absolute maximum ratings. |
Use Scenario: Safeguarding CAN transceiver inputs (CAN_H/CAN_L) against ESD and coupled noise from adjacent high-current circuits (e.g., motor drivers). IC Role / Device Role / Timing Role: Bidirectional protection not applicable here; SMBJ7.0H used on single-ended supply lines (e.g., VCC_IO) feeding transceivers. Use Value: Sub-1 µA leakage at 7.0 V avoids loading low-current bias networks; 13.3 V clamping prevents transceiver damage during ISO 7637-2 Pulse 2b events. |
| Industrial Sensor Interface | Power Supply Input Stage |
|
Use Scenario: Shielding analog front-end amplifiers and ADC reference inputs in automotive pressure sensors subjected to board-level EFT bursts. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector entry point to shunt fast transients before reaching precision analog circuitry. Use Value: <1.0 ps response ensures clamping initiates before 100 MHz+ EFT energy couples into signal traces, preserving measurement integrity. |
Use Scenario: Front-end surge suppression on 12 V input rails of body control modules, guarding against battery-reversal and jump-start transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp in series with input fuse and upstream filter inductors; absorbs energy before it reaches DC-DC converters. Use Value: 600 W peak power rating sustains multiple ISO 7637-2 Pulse 1 events without degradation; DO-214AA footprint allows compact layout near connectors. |
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 SMAJ7.0A | Same DO-214AC (SMA) package; lower PPK = 400 W; VC = 11.2 V @ 100 A; VBR = 7.78–8.60 V. | Lower power rating limits suitability for ISO 7637-2 Pulse 1; better for ESD-only zones with tighter clamping budget. | Select SMAJ7.0A only if system-level surge testing confirms 400 W suffices and space constraints favor SMA over SMB. |
| ON Semiconductor SMCJ7.0A | DO-214AB (SMC) package; PPK = 1500 W; VC = 12.0 V @ 300 A; VBR = 7.78–8.60 V; higher thermal mass. | Overqualified for 600 W needs but offers superior thermal margin in high-ambient environments (e.g., engine bay). | Choose SMCJ7.0A when board layout permits larger SMC footprint and long-term reliability under sustained thermal stress is prioritized over cost or size. |
Compared with SMAJ7.0A, SMBJ7.0H delivers 50% higher surge power handling in a slightly larger SMB package, while SMCJ7.0A trades footprint size for 2.5× power margin - making SMBJ7.0H the balanced choice for AEC-Q101-compliant 12 V automotive subsystems requiring validated 600 W immunity.
Availability
SMBJ7.0H is available at Aetrix Electronics and suitable for automotive lighting control, CAN bus node protection, and industrial sensor interface applications requiring stable component supply across extended production lifecycles.
Supply support for SMBJ7.0H 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 automotive and industrial certifications.
The SMBJH series was developed specifically for AEC-Q101-compliant transient suppression in 12 V and 24 V automotive subsystems, emphasizing low clamping voltage, fast response, and robust thermal performance in surface-mount packages.
FAQ
What is the clamping voltage of SMBJ7.0H at its rated peak pulse current?
The SMBJ7.0H has a maximum clamping voltage (VC) of 13.3 V when subjected to a 200 A peak impulse current with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ7.0H maintains this clamping performance across its specified operating temperature range.
Is SMBJ7.0H suitable for bidirectional transient protection?
No, SMBJ7.0H is a unidirectional TVS diode intended for DC line protection where polarity is fixed - such as 12 V supply rails or ground-referenced signal lines. For bidirectional applications like data lines (e.g., CAN_H/CAN_L), a bipolar variant like SMBJ7.0CH must be used. The SMBJ7.0H cathode band marking indicates polarity-sensitive installation.
Does SMBJ7.0H meet automotive qualification standards?
Yes, SMBJ7.0H is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. It also complies with JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 - confirming suitability for lead-free reflow assembly in automotive production environments.
What is the maximum leakage current of SMBJ7.0H at its working voltage?
At its 7.0 V working stand-off voltage (VWM), the SMBJ7.0H exhibits a maximum blocking leakage current (ID) of 1 µA at 25 °C. This ultra-low leakage ensures minimal impact on battery-powered or always-on automotive modules, preserving system standby current budgets without compromising surge response speed.
What package type does SMBJ7.0H use, and what are its mounting characteristics?
SMBJ7.0H uses the DO-214AA (SMB) surface-mount package with matte tin-plated leads that meet J-STD-002 solderability requirements. Its dimensions and suggested pad layout support automated placement and reflow soldering. The cathode band provides clear polarity identification, and the package achieves UL 94V-0 flammability rating.
SMBJ7.0H 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:
- 13.3V
- Current - Peak Pulse (10/1000µs):
- 47A
- 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)
SMBJ7.0H FAQ
1.How can I place an order for SMBJ7.0H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0H 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 SMBJ7.0H reliable?
The price and inventory of SMBJ7.0H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0H is usually 5 days.
3.What payment methods are accepted for SMBJ7.0H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0H?
SMBJ7.0H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0H 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 SMBJ7.0H?
For technical support, including SMBJ7.0H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0H requirements.
6.How does Aetrix verify that SMBJ7.0H is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0H 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 SMBJ7.0H meets industry standards.
7.What is the process for return or replacement of SMBJ7.0H?
All SMBJ7.0H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0H, 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 SMBJ7.0H part is unused and in its original packaging.
Return procedure for SMBJ7.0H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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