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Vishay General Semiconductor - Diodes Division SMBJ7.5CA-E3/51
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- Part No.:
- SMBJ7.5CA-E3/51
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CA-E3/51.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,580
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Product details
Overview
SMBJ7.5CA-E3/51 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMBJ) package, designed for clamping voltage transients on signal or power lines. It features 600 W peak pulse power (10/1000 μs), 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR at 1 mA), and clamps to ≤12.9 V at 46.5 A peak surge current - used in automotive sensor protection and industrial I/O interface circuits.
For engineers reviewing the SMBJ7.5CA-E3/51 datasheet, SMBJ7.5CA-E3/51 pinout, SMBJ7.5CA-E3/51 application, or SMBJ7.5CA-E3/51 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, RoHS-compliant matte tin plating, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bi-directional TVS diode operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, enabling consistent clamping performance under repetitive 10/1000 μs transients at 0.01% duty cycle.
The device is rated for -55 °C to +150 °C operating junction temperature and exhibits 100 °C/W typical thermal resistance (junction-to-ambient) when mounted on minimum recommended pad layout. It meets UL 94 V-0 flammability requirements and is qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse stand-off voltage before significant leakage begins |
| VBR (min/max) | 8.33 V / 9.21 V at 1 mA - guaranteed breakdown range defining turn-on threshold |
| VC @ IPPM | ≤12.9 V at 46.5 A - clamped voltage during 600 W transient, critical for downstream IC protection |
| PPPM | 600 W - peak pulse power handling per 10/1000 μs waveform, defines surge energy capacity |
| IPPM | 46.5 A - maximum non-repetitive peak pulse current supported without failure |
| TJ max. | +150 °C - maximum junction temperature, sets thermal derating limit for high-ambient designs |
| Leakage @ VWM | ≤100 μA - low reverse leakage preserves signal integrity in high-impedance lines |
Pinout & Package
DO-214AA (SMBJ) surface-mount package with J-bend leads; no polarity marking for bi-directional configuration; matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional transient path | No functional distinction - either terminal serves as input/output for clamping in both directions |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides thermal conduction path to PCB copper pads (0.2" × 0.2") |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surges in automotive and industrial systems |
| AEC-Q101 qualified | Validated for automotive under-hood and chassis applications requiring extended temperature cycling and humidity resistance |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free reflow profiles without preconditioning or baking |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for safety-critical end equipment certifications |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load-dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bi-directional clamping element placed directly at connector entry point to shunt surge energy before reaching sensitive ASICs. Use Value: Limits voltage seen by downstream ICs to ≤12.9 V during 46.5 A transients, preventing latch-up or gate oxide damage in automotive-grade microcontrollers. | Use Scenario: Safeguarding PLC digital input modules and RS-485 transceivers against EFT and lightning-induced surges in factory automation environments. IC Role / Device Role / Timing Role: Primary overvoltage clamp on field-side signal lines, coordinated with series impedance and filtering components. Use Value: Maintains signal integrity during 600 W surges while exhibiting <100 μA leakage at 7.5 V, minimizing DC loading on high-impedance sensor outputs. |
| Telecom Line Protection | Consumer Power Adapter Input |
Use Scenario: Shielding Ethernet PHY interfaces and DSL line drivers from induced surges on unshielded twisted-pair cabling in office building deployments. IC Role / Device Role / Timing Role: First-line transient suppressor on differential data pairs, operating symmetrically without polarity constraints. Use Value: Symmetric 8.33–9.21 V breakdown ensures matched clamping on both conductors, preserving common-mode rejection during fast-rising transients. | Use Scenario: Secondary-level surge suppression on AC-DC adapter primary-side rectifier outputs, complementing MOV-based front-end protection. IC Role / Device Role / Timing Role: Fast-response clamp limiting voltage overshoot during transformer ringing and MOSFET switching events. Use Value: Sub-10 ns response time and low clamping voltage (≤12.9 V) prevent overstress of bulk capacitor dielectric and secondary-side controller ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CAHE3/51 | AEC-Q101 qualified version with identical electrical specs; HE3 suffix denotes automotive qualification grade | Required for automotive OEM designs needing formal AEC-Q101 documentation and traceability | Select SMBJ7.5CAHE3/51 when full automotive qualification evidence (test reports, PPAP) is mandated |
| SMCJ7.5CA-E3/57 | Same VWM/VBR/VC, but in larger DO-214AB (SMC) package with 1500 W PPPM | Used where higher single-event energy absorption is needed, e.g., main power rail protection | Choose SMCJ7.5CA-E3/57 only if system-level testing confirms >600 W surge exposure; otherwise SMBJ7.5CA-E3/51 saves board space |
Compared with SMBJ7.5CAHE3/51, the SMBJ7.5CA-E3/51 lacks formal AEC-Q101 certification documentation but shares identical electrical and thermal performance; versus SMCJ7.5CA-E3/57, it trades 2.5× lower surge rating for 40% smaller footprint and lower parasitic inductance - optimal for compact, cost-sensitive signal-line protection.
Availability
SMBJ7.5CA-E3/51 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O interface hardening, and telecom line safeguarding requiring stable component supply across production lifecycles.
Supply support for SMBJ7.5CA-E3/51 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, and protection devices with emphasis on reliability and application-specific validation.
The SMBJ family targets surface-mount transient suppression in space-constrained, high-reliability applications - engineered for automotive, industrial, and telecom systems demanding repeatable clamping and AEC-Q101 compliance.
FAQ
What does the "CA" suffix indicate in SMBJ7.5CA-E3/51?
The "CA" suffix in SMBJ7.5CA-E3/51 designates a bi-directional configuration, meaning the device provides symmetrical transient suppression in both polarities. Unlike uni-directional variants (e.g., SMBJ7.5A), SMBJ7.5CA-E3/51 has no cathode band marking and delivers identical VBR, VC, and leakage characteristics regardless of voltage polarity applied across its terminals.
Is SMBJ7.5CA-E3/51 suitable for automotive applications?
SMBJ7.5CA-E3/51 is RoHS-compliant and manufactured in an AEC-Q101-qualified process flow, but the E3 suffix denotes commercial-grade qualification. For designs requiring formal AEC-Q101 certification, Vishay offers SMBJ7.5CAHE3/51 - the same device with documented test reports and traceability. SMBJ7.5CA-E3/51 remains widely used in non-safety-critical automotive subsystems.
What is the maximum clamping voltage of SMBJ7.5CA-E3/51 under surge conditions?
The maximum clamping voltage (VC) of SMBJ7.5CA-E3/51 is 12.9 V, measured at its peak pulse current (IPPM) of 46.5 A using a 10/1000 μs waveform. This value represents the upper limit of voltage imposed on protected circuitry during worst-case transient events and is guaranteed across the full operating temperature range.
How does SMBJ7.5CA-E3/51 differ from SMBJ7.5A-E3/51?
SMBJ7.5CA-E3/51 is bi-directional with symmetrical clamping in both polarities and no polarity marking, whereas SMBJ7.5A-E3/51 is uni-directional with a cathode band and conducts only in reverse bias. The uni-directional version also supports 100 A IFSM (8.3 ms surge) and has different leakage specs - making SMBJ7.5CA-E3/51 the correct choice for AC-coupled or differential signal protection.
What PCB pad layout is recommended for SMBJ7.5CA-E3/51?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad for each terminal of SMBJ7.5CA-E3/51 to achieve rated thermal performance and 600 W pulse power handling. Smaller pads reduce heat dissipation, causing premature thermal runaway during repetitive surges - especially above 25 °C ambient. The DO-214AA outline drawing confirms 0.130"–0.155" lead span and 0.084"–0.096" body width.
SMBJ7.5CA-E3/51 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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-E3/51 FAQ
1.How can I place an order for SMBJ7.5CA-E3/51 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CA-E3/51 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-E3/51 reliable?
The price and inventory of SMBJ7.5CA-E3/51 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-E3/51 is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CA-E3/51?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CA-E3/51 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CA-E3/51?
SMBJ7.5CA-E3/51 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CA-E3/51 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-E3/51?
For technical support, including SMBJ7.5CA-E3/51 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CA-E3/51 requirements.
6.How does Aetrix verify that SMBJ7.5CA-E3/51 is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CA-E3/51 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-E3/51 meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CA-E3/51?
All SMBJ7.5CA-E3/51 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CA-E3/51, 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-E3/51 part is unused and in its original packaging.
Return procedure for SMBJ7.5CA-E3/51:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CA-E3/51 Tags
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