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Taiwan Semiconductor Corporation SMBJ7.0C
- Part No.:
- SMBJ7.0C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0C.pdf
- Description:
- 600W, 8.6V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,705
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Product details
Overview
SMBJ7.0C from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 7.0V working stand-off voltage (VWM), 7.78–9.51V breakdown voltage (VBR), and 13.3V maximum clamping voltage (VC) at 200A peak pulse current-designed for ESD and lightning surge protection in automotive power line interfaces.
For engineers reviewing the SMBJ7.0C datasheet, SMBJ7.0C pinout, SMBJ7.0C application, or SMBJ7.0C equivalent, key selection criteria include clamping performance under 10/1000µs transients, unidirectional polarity marking, compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b, and thermal derating above 25°C ambient.
Technical Context
The SMBJ7.0C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (7.78–9.51V at 10mA test current). It clamps transient energy to ≤13.3V at 200A (10/1000µs waveform), limiting downstream voltage stress during fast-rising surges.
Its glass-passivated junction ensures stable leakage (<1µA at 7.0V), while the DO-214AA package provides 10°C/W junction-to-case thermal resistance and supports automated placement. Polarity is marked by cathode band per JEDEC standard.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 7.78V / 9.51V @ 10mA - Confirmed breakdown threshold range defining turn-on consistency |
| VC @ IPP | 13.3V @ 200A - Clamped voltage during 10/1000µs surge, directly limiting IC input stress |
| PPK | 600W - Peak pulse power handling capability per single non-repetitive 10/1000µs event |
| ID @ VWM | <1µA - Low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150°C - Maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 55°C/W - Thermal resistance from junction to ambient, critical for PCB copper area design |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking on one end; matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to protected circuit ground or low-side reference; forms clamping loop with cathode |
| Cathode | Reverse voltage sensing / Clamping node | Connected to protected line (e.g., 12V rail); conducts avalanche current when VLINE > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0ps - Enables clamping before transient edge propagates into sensitive analog or digital inputs |
| Glass passivated junction | Stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) in automotive 12V systems |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow-enables direct SMT assembly without preconditioning |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery feed line in engine control unit (ECU) exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp transients before they reach LDOs and microcontrollers. Use Value: Limits voltage excursion to ≤13.3V during 200A pulses, preventing latch-up or gate oxide damage in downstream 5V/3.3V logic. | Use Scenario: 4–20mA current loop transmitter connected to field sensors in factory automation. IC Role / Device Role / Timing Role: Standoff protection device shunting induced surges from long cable runs into precision ADC front-end. Use Value: Sub-1µA leakage avoids measurement offset; 13.3V clamping protects 24V-tolerant op-amps and current-sense amplifiers. |
| LED Driver Input Stage | USB-C Power Delivery Port |
Use Scenario: Input stage of constant-current LED driver subjected to hot-plug and capacitive discharge events. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input rail upstream of buck controller and MOSFET switch. Use Value: 600W peak power rating absorbs repetitive 10/1000µs surges common in lighting ballast switching without degradation. | Use Scenario: VBUS line protection in USB-C PD sink port where 5–20V negotiation occurs. IC Role / Device Role / Timing Role: Unidirectional clamping element referenced to system ground, guarding USB PD controller and load switch. Use Value: 7.0V VWM allows safe operation across full USB PD 5V–20V range while clamping 100V+ transients to <14V. |
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 | Narrower VBR range (7.78–8.60V vs. 7.78–9.51V); lower clamping voltage (12.0V vs. 13.3V) | Better for tighter clamping margin requirements; same unidirectional configuration and SMB package | Select SMBJ7.0A when lower VC is prioritized over broader VBR tolerance |
| P6SMB7.0C | Same VWM (7.0V), but higher clamping voltage (14.4V @ 200A); 600W rating; identical DO-214AA package | Marginally higher clamping may require downstream voltage margin adjustment; widely stocked alternative | Choose P6SMB7.0C if supply chain diversification is needed and 1.1V higher VC is acceptable |
Compared with SMBJ7.0C, SMBJ7.0A offers tighter VBR control and lower clamping for precision-sensitive rails, while P6SMB7.0C provides second-source availability with slightly relaxed clamping-both retain DO-214AA footprint and unidirectional functionality.
Availability
SMBJ7.0C is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface protection, and LED driver input stage applications requiring stable component supply and ISO 7637-2 compliance.
Supply support for SMBJ7.0C 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, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SMBJ series was designed specifically for high-reliability transient suppression in harsh environments-emphasizing low clamping voltage, fast response, and robust thermal performance in compact SMB packages.
FAQ
What is the polarity configuration of SMBJ7.0C?
The SMBJ7.0C is a unidirectional TVS diode, with cathode marked by a band on the DO-214AA package body. It conducts only during reverse-biased transients-forward voltage drop is 3.5V at 50A, consistent with SMBJ5.0–SMBJ90 devices. This polarity enables precise clamping on positive-rail surge events without forward conduction during normal operation.
Does SMBJ7.0C meet automotive transient immunity standards?
Yes, SMBJ7.0C meets ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) requirements. Its 13.3V clamping voltage at 200A (10/1000µs) and 600W peak power rating ensure reliable suppression of automotive-level surges without degradation under repeated stress.
What is the maximum leakage current of SMBJ7.0C at its working voltage?
The SMBJ7.0C exhibits maximum blocking leakage current (ID) of less than 1µA at its 7.0V working stand-off voltage (VWM), measured at TA = 25°C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in always-on automotive modules.
Can SMBJ7.0C be used in bidirectional configurations?
No-SMBJ7.0C is unidirectional only. For bidirectional operation, select SMBJ7.0CA (with "CA" suffix), which features symmetrical breakdown in both directions and identical VWM/VBR/VC ratings. The "C" suffix alone (as in SMBJ7.0C) denotes unidirectional construction with cathode marking.
What is the thermal resistance profile of SMBJ7.0C?
SMBJ7.0C has a junction-to-case thermal resistance (RθJC) of 10°C/W and junction-to-ambient resistance (RθJA) of 55°C/W at TA = 25°C. These values assume standard PCB layout per DO-214AA recommended pad dimensions; thermal performance degrades linearly above 25°C ambient per the pulse derating curve in Fig.2.
SMBJ7.0C 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:
- -
- Bidirectional Channels:
- 1
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ7.0C FAQ
1.How can I place an order for SMBJ7.0C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0C 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 SMBJ7.0C reliable?
The price and inventory of SMBJ7.0C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0C is usually 5 days.
3.What payment methods are accepted for SMBJ7.0C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0C?
SMBJ7.0C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0C 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 SMBJ7.0C?
For technical support, including SMBJ7.0C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0C requirements.
6.How does Aetrix verify that SMBJ7.0C is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0C 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 SMBJ7.0C meets industry standards.
7.What is the process for return or replacement of SMBJ7.0C?
All SMBJ7.0C units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0C, 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 SMBJ7.0C part is unused and in its original packaging.
Return procedure for SMBJ7.0C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0C Tags
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