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Taiwan Semiconductor Corporation SMBJ6.5CA
- Part No.:
- SMBJ6.5CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ6.5CA.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,228
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Product details
Overview
SMBJ6.5CA 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 power rails and signal lines. It features a 6.5 V working stand-off voltage (VWM), 7.22–8.82 V breakdown voltage (VBR), 12.3 V maximum clamping voltage (VC) at 500 A peak pulse current, and 600 W peak pulse power rating per 10/1000 µs waveform.
For engineers reviewing the SMBJ6.5CA datasheet, SMBJ6.5CA pinout, SMBJ6.5CA application, or SMBJ6.5CA equivalent, key selection criteria include bidirectional clamping capability, low leakage (<1 µA above 10 V), ISO 7637-2 compliance for automotive transients, and DO-214AA mechanical compatibility with automated SMT assembly.
Technical Context
The SMBJ6.5CA is a unidirectional/bidirectional TVS diode configured as a single die in a glass-passivated junction structure. Its fast response time (<1.0 ps) enables effective suppression of ESD events (IEC 61000-4-2) and electrical fast transients (IEC 61000-4-4), while its 150 °C maximum junction temperature supports operation in harsh ambient environments.
Designed for bipolar applications, the CA suffix confirms symmetrical bidirectional behavior - electrical characteristics apply identically in both directions. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements, with matte tin-plated leads compliant to J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 7.22 V / 8.82 V at 10 mA - ensures reliable turn-on within defined tolerance band |
| VC @ IPP | 12.3 V at 500 A - limits protected circuit voltage during worst-case 10/1000 µs surge |
| PPK | 600 W - peak pulse power handling per standard 10/1000 µs waveform |
| ID @ VWM | <1 µA - negligible leakage current preserves low-power system integrity |
| Package | DO-214AA (SMB) - industry-standard surface-mount outline compatible with IPC-7351B footprints |
| TJ max | +150 °C - enables use in under-hood automotive or industrial power supply environments |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; polarity-sensitive for unidirectional variants, but SMBJ6.5CA uses symmetrical bidirectional construction - no functional anode/cathode distinction in circuit operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (marked end) | Transient return path (bidirectional) | Functions as either anode or cathode depending on transient polarity; marked end has no fixed polarity |
| Cathode (unmarked end) | Transient return path (bidirectional) | Electrically identical to marked end; terminals are interchangeable in layout |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or differential buses without polarity concerns |
| Glass passivated junction | Improves long-term reliability and stability of VBR under thermal cycling and humidity stress |
| ISO 7637-2 compliance | Validated for Pulse 1, 2a, 2b, 3a, and 3b waveforms - suitable for 12 V automotive power networks |
| Moisture sensitivity level 1 | Eliminates need for dry-pack or baking prior to reflow - supports standard SMT process flow |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives - compliant for green electronics manufacturing |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Primary surge shunt device placed at power entry point before DC-DC converters. Use Value: Clamps 500 A surges to ≤12.3 V, preventing overvoltage damage to downstream regulators and microcontrollers. | Use Scenario: Safeguarding analog sensor inputs (e.g., RTD, thermocouple) in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-capacitance transient clamp on signal lines exposed to relay switching noise. Use Value: Sub-1 µA leakage avoids DC offset errors; bidirectional symmetry matches differential signaling topologies. |
| LED Driver Input Stage | USB Port ESD Protection |
Use Scenario: Input protection for constant-current LED drivers used in street lighting systems. IC Role / Device Role / Timing Role: First-line defense against inductive kickback from magnetic components and lightning-induced surges. Use Value: 600 W PPK rating handles repetitive line transients; DO-214AA footprint allows compact placement near connector. | Use Scenario: Board-level ESD protection for USB 2.0 data lines in embedded host controllers. IC Role / Device Role / Timing Role: Bidirectional TVS placed between D+ and D− to clamp ±8 kV contact discharge per IEC 61000-4-2. Use Value: Symmetrical clamping ensures equal protection for both signal polarities without additional routing constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.5A | Unidirectional; VF = 3.5 V at 50 A; same VWM/VBR/VC specs | Requires correct polarity orientation; unsuitable for AC or differential signals | Select SMBJ6.5A only when protecting DC rails with known polarity and no reverse-voltage risk |
| SMCJ6.5CA | Same VWM/VBR/VC but higher PPK (1500 W); larger DO-214AB (SMC) package | Occupies ~2.5× PCB area; better suited for >1 kA surge requirements | Choose SMCJ6.5CA where higher energy handling justifies increased board space and thermal mass |
Compared with SMBJ6.5A and SMCJ6.5CA, the SMBJ6.5CA uniquely balances bidirectional functionality, compact DO-214AA footprint, and 600 W surge capacity - making it optimal for space-constrained, polarity-agnostic protection in automotive and industrial interfaces.
Availability
SMBJ6.5CA is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, LED driver input stage protection, and USB port ESD protection requiring stable component supply across production lifecycles.
Supply support for SMBJ6.5CA 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q200 qualified product lines.
The SMBJ series was developed specifically for robust, surface-mount transient suppression in automotive, industrial, and consumer power systems - emphasizing high PPK density, automated assembly compatibility, and stringent environmental compliance.
FAQ
What does the 'CA' suffix indicate in SMBJ6.5CA?
The 'CA' suffix in SMBJ6.5CA denotes a bidirectional configuration - meaning the device provides symmetrical clamping in both forward and reverse directions. Unlike unidirectional variants (e.g., SMBJ6.5A), SMBJ6.5CA has no designated anode or cathode and can be placed without regard to polarity. This makes SMBJ6.5CA ideal for protecting AC-coupled lines, differential buses, or any application where voltage transients may swing positive or negative relative to ground.
What is the maximum clamping voltage of SMBJ6.5CA and under what test condition?
The maximum clamping voltage (VC) of SMBJ6.5CA is 12.3 V, measured at a peak impulse current (IPP) of 500 A using the standardized 10/1000 µs double-exponential surge waveform. This value is guaranteed across the full operating temperature range and represents the highest voltage that will appear across the SMBJ6.5CA during a worst-case transient event - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SMBJ6.5CA compliant with automotive transient immunity standards?
Yes, SMBJ6.5CA meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b - covering common automotive electrical disturbances including load dump, supply interruption, and coupled transients. Its 6.5 V VWM aligns with 12 V system nominal voltages, and its 12.3 V clamping ensures microcontrollers and CAN transceivers remain protected during battery line disturbances. TSC qualifies the SMBJ6.5CA per AEC-Q200 stress testing protocols.
How does SMBJ6.5CA differ from SMBJ6.5A in practical circuit design?
SMBJ6.5CA is bidirectional and polarity-insensitive, whereas SMBJ6.5A is unidirectional and must be oriented correctly in-circuit with its cathode toward the protected side. In practice, SMBJ6.5CA simplifies layout for differential or AC signals and eliminates orientation errors during assembly. SMBJ6.5A offers slightly lower forward voltage (3.5 V at 50 A) but cannot protect against reverse-polarity surges - making SMBJ6.5CA the safer choice unless strict DC polarity control is guaranteed.
What is the moisture sensitivity level (MSL) and reflow profile compatibility of SMBJ6.5CA?
SMBJ6.5CA has a moisture sensitivity level (MSL) of 1 per J-STD-020 - meaning it is not moisture-sensitive and requires no dry-packaging, baking, or special handling before reflow soldering. It supports standard lead-free reflow profiles up to 260 °C peak temperature, with matte tin-plated leads meeting J-STD-002 solderability requirements. This enables direct integration into high-volume SMT lines without process modification.
SMBJ6.5CA 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):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 56A
- 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)
SMBJ6.5CA FAQ
1.How can I place an order for SMBJ6.5CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ6.5CA 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 SMBJ6.5CA reliable?
The price and inventory of SMBJ6.5CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ6.5CA is usually 5 days.
3.What payment methods are accepted for SMBJ6.5CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ6.5CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ6.5CA?
SMBJ6.5CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ6.5CA 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 SMBJ6.5CA?
For technical support, including SMBJ6.5CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ6.5CA requirements.
6.How does Aetrix verify that SMBJ6.5CA is sourced from the original manufacturer or authorized distributors?
All SMBJ6.5CA 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 SMBJ6.5CA meets industry standards.
7.What is the process for return or replacement of SMBJ6.5CA?
All SMBJ6.5CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ6.5CA, 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 SMBJ6.5CA part is unused and in its original packaging.
Return procedure for SMBJ6.5CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ6.5CA Tags
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