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Vishay General Semiconductor - Diodes Division SMBJ7.5CA-E3/52
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- Part No.:
- SMBJ7.5CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CA-E3/52.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,651
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Product details
Overview
SMBJ7.5CA-E3/52 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 or power lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1 mA, 12.9 V maximum clamping voltage (VC) at 46.5 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ7.5CA-E3/52 datasheet, SMBJ7.5CA-E3/52 pinout, SMBJ7.5CA-E3/52 application, or SMBJ7.5CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM ≈ 1.72), MSL Level 1 moisture sensitivity, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical electrical characteristics in forward and reverse directions per ANSI/IEEE C62.35 standards. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). It meets UL 497B recognition (QVGQ2) and is RoHS-compliant (E3 suffix), with no polarity marking required due to bidirectional symmetry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 7.5 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 8.33–9.21 V at IT = 1 mA - Voltage at which device transitions into avalanche conduction; ensures reliable turn-on during transients. |
| VC (Clamping Voltage) | 12.9 V at IPPM = 46.5 A - Maximum voltage seen by protected circuit during 600 W transient; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 600 W with 10/1000 µs waveform - Energy-handling capacity for standardized lightning/surge events per IEC 61000-4-5. |
| ID (Reverse Leakage) | 100 µA max. at VWM - Low leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max. | +150 °C - Enables operation in under-hood automotive or enclosed industrial environments without derating. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.21 mm × 4.06 mm body, compatible with JEDEC MS-012AC footprint. |
Pinout & Package
Package: SMB (DO-214AA), molded case with matte tin-plated leads, MSL Level 1, 260 °C reflow peak. No polarity marking - symmetrical bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; connects across protected line and return (e.g., data pair or supply rail) without orientation constraint. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN, USB D+/D−) without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when mounted on 5.0 mm × 5.0 mm copper pads. |
| Low clamping ratio (VC/VWM = 1.72) | Minimizes overvoltage exposure to downstream ICs - critical for 3.3 V or 5 V logic interfaces with tight absolute maximum ratings. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile (peak 260 °C), eliminating bake requirements and simplifying manufacturing. |
| UL 497B recognized (QVGQ2) | Validates suitability for primary-side telecom and industrial surge protection per safety-critical infrastructure requirements. |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
Use Scenario: Protecting analog output (4–20 mA) or digital I/O lines of PLC modules from inductive switching transients and ESD. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal and ground, clamping fast-rising transients before they reach precision ADC or isolator inputs. Use Value: Prevents latch-up or permanent damage to 24 V-rated interface ICs while maintaining <100 µA leakage at 24 VDC operating voltage. |
Use Scenario: Shielding Ethernet PHY or xDSL line drivers from lightning-induced surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: Paired SMBJ7.5CA-E3/52 devices placed differentially across tip/ring and common-mode across line/ground in hybrid protection schemes. Use Value: Limits common-mode surge voltage to ≤12.9 V during 600 W event, preserving PHY integrity without requiring additional GDT or MOV stages. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs against load dump and ISO 7637-2 pulse 1/2a/5a transients in 12 V systems. IC Role / Device Role / Timing Role: Mounted directly at connector entry point, shunting energy away from ECU PCB traces and internal protection diodes. Use Value: Clamps 12 V system transients to ≤12.9 V within <1 ns, meeting AEC-Q101 qualification requirements when specified with HE3 suffix. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines or HVAC blowers connected to MCU-based motor controllers. IC Role / Device Role / Timing Role: Placed across motor terminals or between H-bridge outputs and ground to clamp inductive kickback during PWM switching. Use Value: Absorbs 600 W pulses without degradation, enabling use of cost-effective 30 V MOSFETs instead of higher-voltage, lower-RDS(on) alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA-M3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package. | No difference in circuit performance; selected where halogen-free material compliance is mandated (e.g., EU WEEE, specific OEM specs). | Choose SMBJ7.5CA-M3/52 when halogen-free bill-of-materials is required; same layout and thermal behavior as SMBJ7.5CA-E3/52. |
| SMCJ7.5CA-E3/52 | Same VWM/VBR/VC specs but in larger SMC (DO-214AB) package with 1500 W PPPM rating and lower RθJA (50 °C/W). | Used where higher surge energy handling (>600 W) or improved thermal dissipation is needed - e.g., front-end AC input protection. | Choose SMCJ7.5CA-E3/52 only if 1500 W rating or enhanced thermal margin is required; requires PCB footprint change and higher board area. |
Compared with SMBJ7.5CA-M3/52, the SMBJ7.5CA-E3/52 offers identical protection performance with standard RoHS compliance; versus SMCJ7.5CA-E3/52, it trades surge capacity and thermal headroom for compact SMB footprint - optimal for space-constrained signal-line protection.
Availability
SMBJ7.5CA-E3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control modules, and consumer appliance motor drives requiring stable component supply and full traceability.
Supply support for SMBJ7.5CA-E3/52 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, TVS, MOSFETs, and optoelectronics with emphasis on reliability and application-specific performance.
The SMBJ series is engineered for robust transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and communications infrastructure where repeatable clamping and long-term stability are critical.
FAQ
What is the clamping voltage of SMBJ7.5CA-E3/52 at its rated peak pulse current?
The SMBJ7.5CA-E3/52 has a maximum clamping voltage (VC) of 12.9 V at 46.5 A peak pulse current (IPPM), measured with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a standardized surge event and is confirmed in Vishay's datasheet revision 09-Jan-2024, page 2. The SMBJ7.5CA-E3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ7.5CA-E3/52 suitable for bidirectional signal line protection?
Yes, SMBJ7.5CA-E3/52 is explicitly designed for bidirectional transient suppression, with identical VBR, VC, and IPPM specifications in both polarities. Its unmarked SMB package reflects symmetrical terminal behavior - making it ideal for protecting differential pairs like RS-485, CAN FD, or USB data lines without polarity constraints. The SMBJ7.5CA-E3/52 meets ANSI/IEEE C62.35 definitions for bidirectional TVS devices.
Does SMBJ7.5CA-E3/52 require special handling for moisture sensitivity?
No - SMBJ7.5CA-E3/52 is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and may be processed using standard SMT reflow profiles with a maximum peak temperature of 260 °C. This eliminates baking requirements and supports high-yield automated assembly. The SMBJ7.5CA-E3/52 achieves this via moisture-resistant molding compound and hermetic lead finish, as documented in Vishay's datasheet section "Mechanical Data".
How does SMBJ7.5CA-E3/52 compare to unidirectional variants like SMBJ7.5A-E3/52?
The SMBJ7.5CA-E3/52 differs from SMBJ7.5A-E3/52 solely in polarity: "CA" denotes bidirectional operation with symmetrical characteristics, while "A" indicates unidirectional operation with cathode band marking and forward voltage drop (VF ≤ 3.5 V at 50 A). Both share identical VWM (7.5 V), VBR (8.33–9.21 V), and PPPM (600 W), but SMBJ7.5CA-E3/52 is mandatory for AC or floating signal paths. Circuit layout must reflect this functional distinction.
What is the thermal resistance of SMBJ7.5CA-E3/52, and how does it affect PCB layout?
SMBJ7.5CA-E3/52 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 specified in Vishay's test condition notes. This value assumes minimal copper area; increasing pad size or adding thermal vias reduces effective RθJA. For sustained power dissipation >500 mW, designers should verify junction temperature rise using SMBJ7.5CA-E3/52's 150 °C TJ max rating and actual ambient conditions.
SMBJ7.5CA-E3/52 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-E3/52 FAQ
1.How can I place an order for SMBJ7.5CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CA-E3/52 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-E3/52 reliable?
The price and inventory of SMBJ7.5CA-E3/52 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-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CA-E3/52?
SMBJ7.5CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CA-E3/52 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-E3/52?
For technical support, including SMBJ7.5CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CA-E3/52 requirements.
6.How does Aetrix verify that SMBJ7.5CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CA-E3/52 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-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CA-E3/52?
All SMBJ7.5CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CA-E3/52, 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-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ7.5CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CA-E3/52 Tags
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