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Vishay General Semiconductor - Diodes Division SMBJ7.0CD-M3/I
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- Part No.:
- SMBJ7.0CD-M3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0CD-M3/I.pdf
- Description:
- TVS DIODE 7VWM 11.8VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:10,883
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Product details
Overview
SMBJ7.0CD-M3/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping ESD and surge transients on signal/power lines. It features 7.0 V stand-off voltage (VWM), 7.90–8.48 V breakdown voltage (VBR) at 10 mA, 600 W peak pulse power (10/1000 μs), 11.8 V maximum clamping voltage (VC) at 50.8 A IPPM, and ±3.5 % VBR tolerance - used to protect sensor interfaces and I/O ports in industrial controllers.
For engineers reviewing the SMBJ7.0CD-M3/I datasheet, SMBJ7.0CD-M3/I pinout, SMBJ7.0CD-M3/I application, or SMBJ7.0CD-M3/I equivalent, key selection criteria include bidirectional clamping capability, low leakage (<500 μA at VWM), M3-grade halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical avalanche behavior in both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its low incremental surge resistance and fast response time ensure effective suppression of sub-microsecond transients induced by inductive switching or ESD events.
The SMBJ7.0CD-M3/I meets J-STD-020 MSL Level 1 moisture sensitivity and withstands 260 °C lead-free reflow peaks. Its thermal resistance junction-to-ambient is 125 °C/W on minimum recommended pad layout, limiting steady-state power dissipation to 1.0 W at TA = 25 °C and 5.0 W at TM = 50 °C with proper heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - maximum reverse working voltage before conduction begins; sets operating margin for protected circuitry |
| VBR min/max | 7.90 V / 8.48 V at IT = 10 mA - tight ±3.5 % tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | 11.8 V at 50.8 A - clamping voltage during 600 W 10/1000 μs surge defines worst-case overvoltage seen by downstream ICs |
| ID @ VWM | <500 μA - low leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes |
| PPPM | 600 W - peak surge handling capacity per single 10/1000 μs waveform, supporting IEC 61000-4-5 Level 3/4 compliance |
| TJ max | +150 °C - maximum junction temperature rating enables reliable operation in industrial ambient environments |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height for space-constrained designs |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no polarity marking required. Terminals are matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. M3 suffix denotes halogen-free, RoHS-compliant, industrial-grade construction meeting JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals function identically; bidirectional conduction enables protection of AC or floating lines without orientation dependency |
| Case (cathode band absent) | Thermal and mechanical interface | No cathode band - visual confirmation of bidirectional configuration; case serves as primary heat path to PCB copper pads |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise clamping threshold control across temperature and lot variations, reducing design margin overhead |
| 600 W peak pulse power | Supports robust immunity to IEC 61000-4-5 combination wave surges up to 4 kV (open-circuit) / 2 kA (short-circuit) |
| Low 500 μA max ID at VWM | Minimizes loading on high-impedance analog or digital signal lines, preserving accuracy and logic thresholds |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing without dry-pack requirements, simplifying manufacturing logistics |
| SMB package with 2.20 mm height | Enables compact board layout while maintaining thermal performance via 5.0 mm × 5.0 mm recommended copper pad area |
Applications
| Industrial Sensor Interface Protection | USB 2.0 Data Line Clamping |
|---|---|
Use Scenario: Protecting 4–20 mA current-loop sensors and RS-485 transceivers from field-induced lightning surges and relay contact bounce. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching precision analog front-end or communication IC. Use Value: 11.8 V clamping voltage ensures downstream op-amps and isolators remain within absolute maximum ratings during 50.8 A surge events. | Use Scenario: Safeguarding USB 2.0 D+ and D− differential pairs against ESD events per IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance TVS pair (one per line) placed adjacent to USB connector to minimize stub length and preserve signal integrity. Use Value: Sub-μA leakage and symmetrical clamping prevent data corruption while maintaining USB full-speed timing margins. |
| Automotive Body Control Module I/O | Smart Meter Communication Port Protection |
Use Scenario: Shielding LIN bus and GPIO lines in body control modules from load-dump and jump-start transients per ISO 7637-2 Pulse 1/2a/5a. IC Role / Device Role / Timing Role: Primary surge suppression element mounted at module edge connector, coordinated with upstream fusing and filtering. Use Value: 150 °C TJ max and M3 industrial qualification ensure reliability under under-hood thermal cycling and long-term automotive service life. | Use Scenario: Hardening RS-485 and PLC communication ports in smart electricity meters against grid-switching surges and induced lightning. IC Role / Device Role / Timing Role: First-line transient absorber located between isolation barrier and external terminal block to limit energy entering meter ASIC. Use Value: 600 W PPPM rating supports multi-event surge endurance required for utility-grade meter certification (e.g., ANSI C12.1, IEC 62053). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0CA-E3/5BT | Same VWM/VBR/VC specs; differs in packaging (tape/reel vs. bulk), MSL level (1 vs. 2a), and whisker test compliance (Class 2 vs. not specified) | Not qualified for extended floor life or high-reliability industrial reflow; requires dry-pack handling | Select SMBJ7.0CD-M3/I when M3-grade halogen-free, RoHS, and JESD 201 Class 2 whisker resistance are mandatory |
| P6SMB7.0CA | Identical electrical specs but older Vishay family; higher RθJA (150 °C/W), no M3 suffix, and non-halogen-free construction | Limited thermal performance on minimal pad layouts; not suitable for lead-free reflow or high-volume automated assembly | Prefer SMBJ7.0CD-M3/I for new designs requiring modern process control, tighter tolerances, and environmental compliance |
Compared with SMBJ7.0CA-E3/5BT and P6SMB7.0CA, the SMBJ7.0CD-M3/I delivers superior manufacturability via MSL Level 1 handling, guaranteed whisker resistance, and tighter VBR tolerance - critical for high-yield SMT production and long-lifecycle industrial deployments.
Availability
SMBJ7.0CD-M3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB 2.0 data line protection, and automotive body control module I/O requiring stable component supply and long-term lifecycle assurance.
Supply support for SMBJ7.0CD-M3/I 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed for high-energy transient suppression in harsh environments, targeting industrial automation, automotive electronics, and telecom infrastructure where consistent clamping performance and robust SMT compatibility are essential.
FAQ
What does the "CD" suffix indicate in SMBJ7.0CD-M3/I?
The "CD" suffix in SMBJ7.0CD-M3/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ7.0D), it has no cathode band and is used where polarity of incoming transients is undefined or alternating, such as on AC-coupled signal lines or floating bus interfaces. This makes SMBJ7.0CD-M3/I ideal for protecting differential pairs like RS-485 or USB D+/D−.
How does SMBJ7.0CD-M3/I differ from unidirectional SMBJ7.0D-M3/I?
SMBJ7.0CD-M3/I is bidirectional with identical clamping characteristics in both directions and no polarity marking, whereas SMBJ7.0D-M3/I is unidirectional with a cathode band and conducts only when anode is more negative than cathode. The SMBJ7.0CD-M3/I's VBR and VC values apply equally to ± polarity surges, enabling use in AC or floating systems without orientation concerns - a key distinction for applications like Ethernet PHY protection or isolated sensor bridges where signal polarity varies.
What is the maximum clamping voltage VC of SMBJ7.0CD-M3/I and how is it measured?
The maximum clamping voltage VC of SMBJ7.0CD-M3/I is 11.8 V, measured at peak pulse current IPPM = 50.8 A using a 10/1000 μs double-exponential surge waveform. This value represents the highest voltage that appears across the device during a standardized surge event and defines the upper bound of overvoltage imposed on protected circuitry. It is confirmed per ANSI/IEEE C62.35 test methodology and guarantees downstream components remain within safe operating limits during transient conditions.
Is SMBJ7.0CD-M3/I compatible with lead-free reflow processes?
Yes, SMBJ7.0CD-M3/I is fully compatible with lead-free reflow processes, rated for a maximum peak temperature of 260 °C per J-STD-020 MSL Level 1. Its matte tin-plated terminals meet J-STD-002 and JESD 22-B102 solderability standards, and the M3 suffix confirms qualification for industrial-grade lead-free assembly. No pre-baking or special handling is required, supporting high-throughput SMT lines without process modification.
What thermal derating applies to SMBJ7.0CD-M3/I at elevated ambient temperatures?
SMBJ7.0CD-M3/I exhibits linear thermal derating above TA = 25 °C: its power dissipation PD drops from 1.0 W at 25 °C to zero at 150 °C, following the curve in Figure 2 of the datasheet. On minimum recommended pad layout, RθJA = 125 °C/W governs this relationship - for example, at TA = 75 °C, allowable PD reduces to approximately 0.6 W. For sustained operation, designers must verify junction temperature remains ≤150 °C using actual board layout and expected surge duty cycle.
SMBJ7.0CD-M3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.9V
- Voltage - Clamping (Max) @ Ipp:
- 11.8V
- Current - Peak Pulse (10/1000µs):
- 50.8A
- 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 (SMBJ)
SMBJ7.0CD-M3/I FAQ
1.How can I place an order for SMBJ7.0CD-M3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0CD-M3/I 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 SMBJ7.0CD-M3/I reliable?
The price and inventory of SMBJ7.0CD-M3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0CD-M3/I is usually 5 days.
3.What payment methods are accepted for SMBJ7.0CD-M3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0CD-M3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0CD-M3/I?
SMBJ7.0CD-M3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0CD-M3/I 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 SMBJ7.0CD-M3/I?
For technical support, including SMBJ7.0CD-M3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0CD-M3/I requirements.
6.How does Aetrix verify that SMBJ7.0CD-M3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0CD-M3/I 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 SMBJ7.0CD-M3/I meets industry standards.
7.What is the process for return or replacement of SMBJ7.0CD-M3/I?
All SMBJ7.0CD-M3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0CD-M3/I, 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 SMBJ7.0CD-M3/I part is unused and in its original packaging.
Return procedure for SMBJ7.0CD-M3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0CD-M3/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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