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Taiwan Semiconductor Corporation SMBJ7.0A
- Part No.:
- SMBJ7.0A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0A.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,786
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Product details
Overview
SMBJ7.0A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy ESD and surge protection in DC power rails and signal lines. It features a 7.0 V working stand-off voltage (VWM), 7.78–8.60 V breakdown voltage (VBR), 12.0 V maximum clamping voltage (VC) at 200 A peak pulse current (IPP), and 600 W peak pulse power (PPK) rating with sub-1 ps response time.
For engineers reviewing the SMBJ7.0A datasheet, SMBJ7.0A pinout, SMBJ7.0A application, or SMBJ7.0A equivalent, key selection criteria include clamping performance under IEC 61000-4-2/4-5, leakage current below 1 µA at 7.0 V, compatibility with automated SMT assembly, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics.
Technical Context
The SMBJ7.0A operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its specified VBR range (7.78–8.60 V @ 10 mA). Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while the DO-214AA package provides thermal resistance of 55 °C/W (junction-to-ambient) and supports 100 A non-repetitive forward surge current (IFSM).
It meets ISO 7637-2 immunity requirements for automotive electronics and delivers consistent clamping at 12.0 V under 200 A (10/1000 µs waveform), enabling robust protection of downstream ICs such as microcontrollers, CAN transceivers, and sensor interfaces without compromising signal integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR min/max | 7.78 V / 8.60 V @ 10 mA - Confirmed avalanche threshold range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPP | 12.0 V @ 200 A (10/1000 µs) - Clamped voltage seen by protected circuit during worst-case surge; limits stress on 5 V or 3.3 V logic. |
| PPK | 600 W - Peak transient energy handling capacity; sufficient for ISO 7637-2 Pulse 1 (inductive load dump) and IEC 61000-4-5 Level 3. |
| ID @ VWM | <1 µA - Ultra-low leakage preserves battery life and avoids false triggers in high-impedance sensing circuits. |
| Response time | <1.0 ps - Enables suppression before ESD or fast transients propagate into sensitive nodes. |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Weight: 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND) in unidirectional configuration; enables low VF (3.5 V @ 50 A) during surge conduction. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 5 V rail); conducts avalanche current when transient exceeds VBR, clamping voltage to ≤12.0 V. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure per J-STD-020 Level 1. |
| Sub-1 ps response | Prevents nanosecond-scale ESD events from reaching protected IC inputs, meeting IEC 61000-4-2 Level 4 (15 kV air / 8 kV contact). |
| ISO 7637-2 compliance | Validated for automotive load-dump (Pulse 2b), supply transients (Pulse 1/3a/3b), and coupling noise (Pulse 2a) without derating. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; suitable for consumer, industrial, and automotive end-equipment. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 5 V microcontroller power input in body control modules exposed to ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2b (load dump). IC Role / Device Role / Timing Role: Unidirectional TVS placed between VCC and GND, absorbing up to 600 W surges while limiting clamped voltage to 12.0 V. Use Value: Prevents latch-up or permanent damage to MCU during vehicle battery disconnection/reconnection events. | Use Scenario: Safeguarding analog output pins of pressure sensors in factory automation systems subject to EFT (IEC 61000-4-4) and ESD (IEC 61000-4-2). IC Role / Device Role / Timing Role: TVS connected from sensor output line to ground, activated within <1 ps to clamp transients before they reach ADC input stages. Use Value: Maintains measurement accuracy by suppressing sub-100 ns spikes that would otherwise saturate op-amp front-ends. |
| LED Driver Input Protection | USB Port ESD Protection |
Use Scenario: Shielding constant-current LED driver IC inputs from inductive kickback during PWM dimming in architectural lighting systems. IC Role / Device Role / Timing Role: SMBJ7.0A placed across driver enable pin and GND, conducting only during overvoltage events above 7.78 V. Use Value: Eliminates false triggering and gate oxide stress in MOSFET drivers, extending system lifetime beyond 50,000 hours. | Use Scenario: Front-line ESD protection for USB 2.0 D+ and D− lines in embedded host controllers, subjected to ±15 kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS (CJ ≈ 1000 pF @ 0 V) shunting transients to ground before reaching USB PHY. Use Value: Preserves signal integrity at 480 Mbps while passing IEC 61000-4-2 Level 4 without data corruption or link reset. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0 | Higher VBR max (9.51 V vs. 8.60 V) and higher VC (13.3 V vs. 12.0 V) at same IPP; no "A" suffix indicates looser VBR tolerance. | Less precise clamping; may allow higher stress on protected IC during marginal surges. | Select SMBJ7.0A when tighter VBR control and lower clamping voltage are required for 5 V logic protection. |
| SAC7.0 | Same VWM (7.0 V) but lower PPK (400 W), higher VC (13.7 V @ 150 A), and different package (DO-214AC/SMA); not drop-in compatible. | Reduced surge margin; requires PCB layout change due to SMA footprint and thermal profile differences. | Choose SMBJ7.0A for higher energy handling and DO-214AA compatibility in space-constrained designs. |
Compared with SMBJ7.0 and SAC7.0, SMBJ7.0A offers the tightest VBR tolerance (±6.2%), lowest clamping voltage (12.0 V), and full DO-214AA mechanical compatibility-making it optimal for automotive and industrial applications demanding repeatable surge immunity and automated assembly.
Availability
SMBJ7.0A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, and LED driver input protection requiring stable component supply and full traceability.
Supply support for SMBJ7.0A 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 headquartered in Hsinchu, Taiwan, specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs since 1979.
The SMBJ series was developed specifically for high-reliability transient suppression in automotive, industrial, and consumer electronics-emphasizing low clamping, fast response, and AEC-Q101 readiness through rigorous qualification testing.
FAQ
What is the maximum clamping voltage of SMBJ7.0A under standard test conditions?
The SMBJ7.0A has a maximum clamping voltage (VC) of 12.0 V when subjected to a 200 A peak pulse current with a 10/1000 µs waveform at TA = 25°C. This value is measured across the device terminals during surge conduction and represents the upper voltage limit imposed on the protected circuit. The SMBJ7.0A maintains this clamping performance consistently across its qualified operating temperature range.
Is SMBJ7.0A suitable for bidirectional transient protection?
No, SMBJ7.0A is a unidirectional TVS diode intended for DC rail or single-polarity signal line protection. For bidirectional applications (e.g., AC lines or differential buses), use SMBJ7.0CA or SMBJ7.0A with CA suffix, which feature symmetrical breakdown in both directions. The SMBJ7.0A's cathode band marking and asymmetric IV curve confirm its unidirectional design; applying reverse bias beyond VWM will cause conduction only in the marked direction.
What is the leakage current specification for SMBJ7.0A at its working stand-off voltage?
The SMBJ7.0A exhibits a maximum blocking leakage current (ID) of less than 1 µA when biased at its rated working stand-off voltage (VWM) of 7.0 V and tested at TA = 25°C. This ultra-low leakage ensures minimal power loss in battery-powered systems and prevents false triggering in high-impedance monitoring circuits. The specification is verified per JEDEC test methods and remains valid across the full storage temperature range (–55°C to +150°C).
Does SMBJ7.0A meet automotive industry surge immunity standards?
Yes, SMBJ7.0A meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (supply line transient), Pulse 2b (load dump), and Pulses 3a/3b (capacitive coupling and ignition noise). Its 600 W peak pulse power rating, 12.0 V clamping voltage, and thermal design (RθJA = 55 °C/W) enable reliable operation in 12 V automotive subsystems without external heatsinking. The device is also moisture sensitivity level 1 per J-STD-020, supporting lead-free reflow profiles.
What packaging and reel options are available for SMBJ7.0A?
SMBJ7.0A is supplied in DO-214AA (SMB) package format on 3,000-unit tape-and-reel carriers per standard ordering code SMBJ7.0A. The reels comply with EIA-481-D standards and include matte tin-plated leads certified to J-STD-002 for solderability. Each reel is labeled with TSC's date code (YW), factory code (F), and marking code (KM), ensuring full traceability. Custom packaging (e.g., cut tape or bulk) is available upon request with minimum order quantities.
SMBJ7.0A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ7.0A FAQ
1.How can I place an order for SMBJ7.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0A 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 SMBJ7.0A reliable?
The price and inventory of SMBJ7.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0A is usually 5 days.
3.What payment methods are accepted for SMBJ7.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0A?
SMBJ7.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0A 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 SMBJ7.0A?
For technical support, including SMBJ7.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0A requirements.
6.How does Aetrix verify that SMBJ7.0A is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0A 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 SMBJ7.0A meets industry standards.
7.What is the process for return or replacement of SMBJ7.0A?
All SMBJ7.0A units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0A, 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 SMBJ7.0A part is unused and in its original packaging.
Return procedure for SMBJ7.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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