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Vishay General Semiconductor - Diodes Division SMBJ7.5CA-E3/5B
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- Part No.:
- SMBJ7.5CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CA-E3/5B.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,870
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Product details
Overview
SMBJ7.5CA-E3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA test current, and clamps to ≤12.9 V at 46.5 A peak pulse current (IPPM) under 10/1000 µs waveform - protecting sensitive ICs, MOSFETs, and sensor interfaces in industrial and telecom systems.
For engineers reviewing the SMBJ7.5CA-E3/5B datasheet, SMBJ7.5CA-E3/5B pinout, SMBJ7.5CA-E3/5B application, or SMBJ7.5CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, 600 W peak pulse power rating, low clamping ratio (VC/VBR ≈ 1.55), and AEC-Q101 qualification eligibility via HE3/HM3 variants - critical for automotive-grade surge protection design.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable clamping performance over temperature (VBR tempco = 0.067 %/°C).
Designed for transient suppression per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge), it delivers 600 W peak pulse power (10/1000 µs) with 0.01 % duty cycle, derating above 25 °C per Fig. 2. Thermal resistance is 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 7.5 V - maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 8.33–9.21 V at 1.0 mA - guaranteed conduction onset; ensures reliable triggering during transients |
| VC (Clamping Voltage) | ≤12.9 V at 46.5 A (10/1000 µs) - limits downstream voltage stress; clamping ratio = 1.55 typical |
| PPPM (Peak Pulse Power) | 600 W - suppresses high-energy surges without failure; validated per Fig. 1 derating curve |
| IPPM (Peak Pulse Current) | 46.5 A - maximum non-repetitive surge current supported; measured with 10/1000 µs waveform |
| Junction Temp Range | −55 °C to +150 °C - supports operation in harsh environments including automotive under-hood locations |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated assembly; MSL Level 1, 260 °C reflow |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional configuration - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | AC-coupled transient path | No polarity marking; either terminal serves as input/output for bidirectional clamping - eliminates orientation errors in layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - protects AC-coupled or floating signal lines without polarity constraints |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) on properly routed PCB traces with 0.2" × 0.2" copper pads |
| Low clamping voltage (12.9 V) | Provides ≥1.5 V margin below 14 V logic supply rails - prevents latch-up or damage to 3.3 V/5 V interface ICs |
| Fast response time (<1 ns) | Activates before transient energy couples into protected circuitry - essential for ESD and EFT immunity |
| AEC-Q101 qualification option | HE3/HM3 suffix variants meet automotive reliability standards - suitable for infotainment, ADAS sensor front-ends |
Applications
| Industrial Motor Control | Automotive Sensor Interface |
|---|---|
|
Use Scenario: Protection of encoder feedback lines and Hall-effect sensor outputs against inductive kickback from brushed DC motors. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to clamp ±1 kV EFT bursts and 600 V surges. Use Value: Prevents false triggering or permanent damage to microcontroller GPIOs and analog front-end amplifiers - maintains position accuracy and system uptime. |
Use Scenario: Shielding LIN bus transceivers and temperature/pressure sensors in engine control modules from load dump and battery reversal transients. IC Role / Device Role / Timing Role: Standoff voltage (7.5 V) aligns with 5 V sensor supply; clamps to 12.9 V to stay below transceiver absolute max rating. Use Value: Enables compliance with ISO 7637-2 Pulse 1/2a/3a and ISO 16750-2 requirements without additional filtering components. |
| Telecom Power Supply Input | Consumer USB-C Port Protection |
|
Use Scenario: Secondary-side surge protection on 12 V DC input rails of PoE-powered network switches and base stations. IC Role / Device Role / Timing Role: Placed after primary DC-DC converter output to absorb residual transients from upstream AC/DC stage or cable coupling. Use Value: Limits voltage excursion to ≤12.9 V during 10/1000 µs surges - avoids overvoltage shutdown of downstream PMICs and FPGAs. |
Use Scenario: Bidirectional clamping on USB-C CC and SBU lines exposed to ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Low capacitance (typ. 150 pF at 0 V) avoids signal integrity degradation on 10 Gbps SuperSpeed lanes. Use Value: Passes IEC 61000-4-2 ±15 kV contact discharge while maintaining USB IF compliance - no data corruption or port 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 |
|---|---|---|---|
| SMBJ7.5CA-M3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and SMB package | No functional difference; selected when halogen-free material compliance is required per IPC-1752A | Choose for green manufacturing programs where brominated flame retardants must be avoided. |
| SMAJ7.5CA-E3/5B | Same VWM/VBR/VC ratings but lower PPPM (400 W) and higher RθJA (140 °C/W); SMA (DO-214AC) package | Reduced surge handling capacity; requires larger copper area or forced cooling for equivalent thermal performance | Select only if board space constraints prohibit SMB footprint and surge energy is limited to ≤400 W. |
Compared with SMBJ7.5CA-E3/5B, the M3 variant offers identical protection performance with halogen-free construction, while the SMAJ7.5CA-E3/5B trades 33 % lower peak power rating and inferior thermal dissipation for a smaller footprint - requiring careful thermal validation in high-duty-cycle applications.
Availability
SMBJ7.5CA-E3/5B is available at Aetrix Electronics and suitable for industrial motor control, automotive sensor interface, telecom power supply input, and consumer USB-C port protection requiring stable component supply and consistent surge immunity performance.
Supply support for SMBJ7.5CA-E3/5B 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, power efficiency, and automotive-grade qualification.
The SMBJ series targets high-energy transient suppression in space-constrained applications, combining 600 W pulse capability with industry-standard SMB packaging - engineered for robustness in industrial automation, transportation, and communications infrastructure.
FAQ
What is the clamping voltage of SMBJ7.5CA-E3/5B at its rated peak pulse current?
The SMBJ7.5CA-E3/5B clamps to a maximum of 12.9 V at its rated peak pulse current of 46.5 A under the standardized 10/1000 µs waveform. This value is specified in the Electrical Characteristics table on page 2 of Vishay document 88392 and reflects worst-case device behavior across temperature and process variation - ensuring downstream circuits remain within safe operating voltage limits during surge events.
Is SMBJ7.5CA-E3/5B unidirectional or bidirectional?
SMBJ7.5CA-E3/5B is a bidirectional Transient Voltage Suppressor, as indicated by the "CA" suffix per Vishay's naming convention. Its electrical characteristics - including VBR, VC, and IPPM - apply identically in both directions, and it carries no polarity marking on the SMB (DO-214AA) package. This makes SMBJ7.5CA-E3/5B ideal for protecting AC-coupled or floating signal paths where voltage polarity reverses.
Does SMBJ7.5CA-E3/5B meet automotive qualification standards?
The base SMBJ7.5CA-E3/5B is commercial-grade and not AEC-Q101 qualified; however, Vishay offers functionally identical variants with HE3 (RoHS-compliant + AEC-Q101) and HM3 (halogen-free + RoHS + AEC-Q101) suffixes. These qualified versions share the same electrical parameters and SMB package but undergo extended reliability testing - making them suitable for automotive applications where SMBJ7.5CA-E3/5B alone would not be approved.
What is the thermal resistance of SMBJ7.5CA-E3/5B, and how does it affect layout?
SMBJ7.5CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in Vishay document 88392. To maintain safe junction temperatures during repetitive surges, PCB layout must provide adequate copper area and avoid thermal bottlenecks - reducing pad size or adding isolation cuts degrades heat dissipation and risks thermal runaway.
How does the 7.5 V stand-off voltage (VWM) of SMBJ7.5CA-E3/5B relate to system supply rails?
The 7.5 V VWM of SMBJ7.5CA-E3/5B is selected to sit safely above common 5 V logic rails while remaining well below 12 V or 15 V power domains - providing margin against normal operating voltage fluctuations while ensuring rapid clamping during transients exceeding 8.33 V. This allows SMBJ7.5CA-E3/5B to protect 5 V interfaces without leakage-induced power loss or false triggering during nominal operation.
SMBJ7.5CA-E3/5B 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 46.5A
- 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)
SMBJ7.5CA-E3/5B FAQ
1.How can I place an order for SMBJ7.5CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CA-E3/5B 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 SMBJ7.5CA-E3/5B reliable?
The price and inventory of SMBJ7.5CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CA-E3/5B?
SMBJ7.5CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CA-E3/5B 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 SMBJ7.5CA-E3/5B?
For technical support, including SMBJ7.5CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CA-E3/5B requirements.
6.How does Aetrix verify that SMBJ7.5CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CA-E3/5B 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 SMBJ7.5CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CA-E3/5B?
All SMBJ7.5CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CA-E3/5B, 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 SMBJ7.5CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ7.5CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CA-E3/5B Tags
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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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