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Taiwan Semiconductor Corporation SMBJ7V5CA
- Part No.:
- SMBJ7V5CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7V5CA.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:10,298
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Product details
Overview
SMBJ7V5CA from Taiwan Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy ESD and surge protection in DC power rails and signal lines. It features a 7.5 V working stand-off voltage (VWM), 8.33–10.3 V breakdown voltage (VBR) at 1 mA test current, 100 A peak pulse current (IPP), 14.3 V maximum clamping voltage (VC) at IPP, and 600 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMBJ7V5CA datasheet, SMBJ7V5CA pinout, SMBJ7V5CA application, or SMBJ7V5CA equivalent, key selection criteria include bidirectional clamping capability, sub-1 ps response time, <1 µA leakage at 7.5 V, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and suitability for automotive body electronics, industrial I/O protection, and USB/RS-485 interface hardening.
Technical Context
The SMBJ7V5CA implements a silicon avalanche diode structure with glass-passivated junction, enabling fast transient suppression without degradation under repeated surges. Its bidirectional configuration (denoted by "CA" suffix) ensures symmetrical clamping in both polarities, eliminating need for polarity-aware layout.
Thermal performance is defined by 10 °C/W junction-to-case (RθJC) and 55 °C/W junction-to-ambient (RθJA) resistance, supporting continuous operation up to +150 °C junction temperature. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements for reflow compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR min/max | 8.33 V / 10.3 V @ 1 mA - Confirmed breakdown range ensures reliable turn-on across process variation and temperature. |
| VC @ IPP | 14.3 V @ 100 A - Clamping voltage limits downstream IC stress during 10/1000 µs transients; critical for 12 V system rail protection. |
| PPK | 600 W - Peak pulse power handling per single 10/1000 µs event; supports automotive load-dump and ISO 7637-2 Pulse 5a simulation. |
| ID @ VWM | <1 µA - Ultra-low leakage preserves battery life in always-on circuits and avoids false triggering in high-impedance sensing nodes. |
| Response time | <1.0 ps - Sub-picosecond junction response enables protection of high-speed interfaces like CAN FD and USB 2.0 without signal distortion. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional symmetric construction with cathode band omitted (no polarity marking required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminals | Either terminal serves as anode or cathode depending on transient polarity; no orientation required during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low leakage over 10+ years in humid industrial environments (IPC-J-STD-002 solderability verified). |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling), enabling drop-in use in automotive ECUs. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; compatible with lead-free reflow profiles up to 260 °C peak. |
| Level 1 moisture sensitivity | Zero bake requirement prior to SMT assembly; supports standard tape-and-reel automated placement without dry-pack handling. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V supply rail and LIN bus lines against load dump and jump-start transients in door modules and lighting controllers. IC Role / Device Role: Primary bidirectional clamping element placed upstream of LDOs and microcontrollers. Use Value: Limits rail voltage to ≤14.3 V during 100 A, 10/1000 µs pulses, preventing latch-up and permanent damage to 16 V-rated power management ICs. |
Use Scenario: Safeguarding 24 V digital input channels from field-wiring induced surges and ESD events in factory automation cabinets. IC Role / Device Role: Front-end transient suppressor mounted directly at connector entry point. Use Value: Withstands ≥1000 surges at 100 A without parameter shift, ensuring long-term reliability in unattended 24/7 operation. |
| USB 2.0 Data Line Protection | RS-485 Transceiver Interface |
Use Scenario: Shielding D+/D− lines from human-body-model (HBM) ESD and cable discharge events in embedded host ports. IC Role / Device Role: Low-capacitance TVS pair (one SMBJ7V5CA per line) placed adjacent to USB connector. Use Value: Junction capacitance <100 pF at 0 V enables full-speed (480 Mbps) signaling integrity while clamping ±8 kV contact ESD to <15 V. |
Use Scenario: Protecting half-duplex RS-485 transceivers (e.g., THVD1550) from lightning-induced surges on long-haul field wiring. IC Role / Device Role: Bidirectional clamp between A/B differential pair and ground, referenced to common-mode voltage. Use Value: Symmetric clamping maintains differential mode integrity; 14.3 V VC prevents transceiver output stage saturation during 1 kV/µs common-mode transients. |
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 (ON Semiconductor) | Identical VWM (7.5 V), VBR (8.33–10.3 V), VC (14.3 V), and PPK (600 W); same DO-214AA package and bidirectional configuration. | No functional difference; validated for identical ISO 7637-2 and IEC 61000-4-2 test profiles. | Drop-in replacement with identical footprint, thermal profile, and qualification data-preferred where ON Semi sourcing is mandated. |
| P6SMB7.5CA (Littelfuse) | VWM = 7.5 V, VBR = 8.3–10.3 V, VC = 14.3 V, PPK = 600 W; DO-214AA package; meets same ISO 7637-2 and RoHS standards. | Same electrical performance but qualified to AEC-Q200 Grade 1; preferred for automotive production requiring extended reliability documentation. | Select when AEC-Q200 qualification and full PPAP support are required; otherwise electrically interchangeable. |
Compared with SMBJ7V5CA, SMBJ7.5CA offers identical electrical and mechanical specs from another vendor, while P6SMB7.5CA adds AEC-Q200 Grade 1 qualification-making it suitable for automotive production release where SMBJ7V5CA serves R&D and industrial prototyping.
Availability
SMBJ7V5CA is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O protection, USB 2.0 interface hardening, and RS-485 communication systems requiring stable component supply and consistent surge immunity performance.
Supply support for SMBJ7V5CA 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and power management devices since 1979.
The SMBJ series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing robustness against repetitive surges, tight parametric distribution, and seamless SMT integration.
FAQ
What does the "CA" suffix indicate in SMBJ7V5CA?
The "CA" suffix in SMBJ7V5CA denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage clamping for both positive and negative polarity transients without requiring polarity-specific placement. This distinguishes it from unidirectional variants (e.g., SMBJ7V5A) and makes SMBJ7V5CA ideal for protecting AC-coupled or floating signal lines such as RS-485 or CAN bus pairs.
Is SMBJ7V5CA compliant with automotive surge standards?
Yes, SMBJ7V5CA meets ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling), making it suitable for front-end protection in automotive body control modules, infotainment head units, and sensor interfaces. Its 600 W peak power rating supports full compliance with 12 V system-level testing.
What is the maximum clamping voltage of SMBJ7V5CA under a 100 A transient?
The maximum clamping voltage (VC) of SMBJ7V5CA is 14.3 V when subjected to a 100 A peak impulse current with a 10/1000 µs waveform. This value is guaranteed across temperature and process variation, ensuring downstream components-such as 16 V-rated LDOs or microcontrollers-are protected from overvoltage stress during real-world surge events.
Can SMBJ7V5CA be used in USB 2.0 data line protection?
Yes, SMBJ7V5CA is suitable for USB 2.0 data line protection due to its sub-100 pF junction capacitance at 0 V bias and fast <1 ps response time. When placed as a pair (one per D+ and D− line), it clamps ±8 kV HBM ESD events to under 15 V while preserving signal integrity at 480 Mbps-provided layout minimizes trace inductance and grounds are low-impedance.
Does SMBJ7V5CA require special handling for moisture sensitivity?
No, SMBJ7V5CA is rated at Moisture Sensitivity Level (MSL) 1 per J-STD-020, meaning it has unlimited floor life at ≤30 °C/60% RH and requires no baking or dry-pack handling before reflow soldering. This simplifies manufacturing logistics and supports high-throughput automated placement on standard SMT lines.
SMBJ7V5CA 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):
- 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 (SMB)
SMBJ7V5CA FAQ
1.How can I place an order for SMBJ7V5CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7V5CA 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 SMBJ7V5CA reliable?
The price and inventory of SMBJ7V5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7V5CA is usually 5 days.
3.What payment methods are accepted for SMBJ7V5CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7V5CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7V5CA?
SMBJ7V5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7V5CA 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 SMBJ7V5CA?
For technical support, including SMBJ7V5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7V5CA requirements.
6.How does Aetrix verify that SMBJ7V5CA is sourced from the original manufacturer or authorized distributors?
All SMBJ7V5CA 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 SMBJ7V5CA meets industry standards.
7.What is the process for return or replacement of SMBJ7V5CA?
All SMBJ7V5CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7V5CA, 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 SMBJ7V5CA part is unused and in its original packaging.
Return procedure for SMBJ7V5CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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