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Taiwan Semiconductor Corporation SMBJ6.5A
- Part No.:
- SMBJ6.5A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ6.5A.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,798
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Product details
Overview
SMBJ6.5A from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 6.5V working stand-off voltage (VWM), 7.22–7.98V breakdown voltage (VBR), and 11.2V maximum clamping voltage (VC) at 500A peak pulse current - designed for ESD and surge protection in automotive power line and industrial sensor interfaces.
For engineers reviewing the SMBJ6.5A datasheet, SMBJ6.5A pinout, SMBJ6.5A application, or SMBJ6.5A equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature limits up to +150°C, leakage current ≤1μA at 6.5V, and compatibility with automated SMT placement on high-reliability PCBs.
Technical Context
The SMBJ6.5A employs a glass-passivated silicon junction optimized for fast transient response (<1.0ps), enabling effective suppression of ESD events and electrical fast transients (EFT). Its unidirectional configuration provides forward conduction capability with VF = 3.5V at 50A, supporting inductive load switching protection.
Thermal design is supported by RθJC = 10°C/W and RθJA = 55°C/W, allowing reliable operation at ambient temperatures from –55°C to +150°C. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for molded compound.
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 / 7.98 V @ 10 mA - Confirmed breakdown range ensures predictable turn-on during overvoltage |
| VC @ IPP | 11.2 V @ 500 A - Clamping voltage limits downstream IC stress during 10/1000µs surges |
| PPK | 600 W - Peak pulse power rating per ISO 7637-2-compliant transient waveforms |
| ID @ VWM | <1 µA - Low leakage preserves signal integrity and battery life in always-on circuits |
| TJ max | +150 °C - Enables use in under-hood automotive and industrial environments |
| Package | DO-214AA (SMB) - Standardized SMT footprint compatible with IPC-7351B land patterns |
Pinout & Package
DO-214AA (SMB) package with cathode band marking; two-terminal unidirectional device. Matte tin-plated leads meet J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current path / low-side connection | Connected to ground or return path in unidirectional TVS configuration |
| Cathode | Protected line input / high-side connection | Connected to I/O line or power rail requiring transient suppression; marked with band |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and improved humidity resistance vs. epoxy-passivated alternatives |
| Fast response time <1.0 ps | Clamps ESD events before sensitive CMOS inputs reach destructive voltage thresholds |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive 12V/24V system-level surge immunity without external filtering |
| Moisture sensitivity level 1 | Eliminates bake requirement prior to reflow, reducing manufacturing cost and process risk |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU for green electronics manufacturing |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery line in engine control unit exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp transients above 6.5V. Use Value: Limits clamping voltage to 11.2V at 500A, protecting downstream LDOs and microcontrollers rated for ≤16V absolute max. | Use Scenario: 4–20mA current loop interface in PLC analog input module subject to field wiring ESD. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; SMBJ6.5A used as unidirectional clamp on supply side of loop-powered sensor. Use Value: Sub-1µA leakage avoids error in precision current measurement; 600W rating handles multiple 4kV contact ESD strikes. |
| LED Driver Overvoltage Clamp | USB Port ESD Suppression |
Use Scenario: Constant-current LED driver IC powered from 12V supply with inductive flyback risk during PWM switching. IC Role / Device Role / Timing Role: TVS connected across input capacitor to absorb inductive kickback energy. Use Value: 3.5V forward voltage enables safe dissipation of 100A surge (IFSM), preventing driver latch-up or gate oxide damage. | Use Scenario: VBUS line of USB 2.0 host port exposed to human-body-model ESD during cable insertion. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND, upstream of USB power switch. Use Value: 11.2V clamping ensures USB PHY ICs (typically rated to 13.2V) remain within safe operating area during ±8kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.5CA | Bidirectional variant with same VWM (6.5V), symmetric VBR (7.22–7.98V), and VC (11.2V); dual-clamping capability | Required where AC-coupled lines or bidirectional data buses (e.g., RS-485) need protection in both polarities | Select SMBJ6.5CA only if bipolar transients are expected; SMBJ6.5A is lower-cost and lower-leakage for DC rails. |
| P6SMB6.5A | Identical electrical specs (VWM=6.5V, VBR=7.22–7.98V, VC=11.2V), same DO-214AA package, but from STMicroelectronics | No functional difference; validated drop-in replacement per manufacturer cross-reference documentation | P6SMB6.5A offers second-source availability with identical thermal and surge performance; suitable for BOM diversification. |
Compared with SMBJ6.5A, SMBJ6.5CA adds bidirectional clamping at no penalty to DC leakage or clamping voltage, while P6SMB6.5A provides a fully pin- and spec-compatible alternative from another qualified supplier - both preserve layout, thermal management, and protection margin.
Availability
SMBJ6.5A is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface protection, and LED driver overvoltage clamp applications requiring stable component supply and full traceability.
Supply support for SMBJ6.5A 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 for industrial and automotive markets.
The SMBJ series was developed specifically for high-reliability, high-power transient suppression in harsh environments - emphasizing ISO 7637-2 compliance, low leakage, and robust SMT manufacturability.
FAQ
What is the maximum clamping voltage of SMBJ6.5A at its rated peak pulse current?
The SMBJ6.5A has a maximum clamping voltage (VC) of 11.2 V when subjected to its rated 500 A peak impulse current (IPP) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream circuitry remains within safe voltage limits during standardized surge events. The SMBJ6.5A maintains this clamping performance across its specified junction temperature range.
Is SMBJ6.5A suitable for bidirectional signal line protection?
No - SMBJ6.5A is a unidirectional TVS diode intended for DC power rail or single-polarity signal protection. For bidirectional applications such as RS-485 or AC-coupled audio lines, the SMBJ6.5CA variant must be used. The SMBJ6.5A's cathode band marking and asymmetric IV curve confirm its unidirectional functionality; using it on bidirectional lines risks failure during negative transients.
What is the forward voltage specification for SMBJ6.5A, and why does it matter?
The SMBJ6.5A has a forward voltage (VF) of 3.5 V at 50 A, per the manufacturer's datasheet note for SMBJ5.0–SMBJ90 devices. This parameter matters during high-current inductive switching events, where the device conducts forward to dissipate energy. A low VF minimizes power dissipation in the TVS itself and prevents excessive heating during repetitive surges, supporting reliable operation in motor drive or relay coil snubbing applications.
Does SMBJ6.5A require moisture preconditioning before reflow soldering?
No - SMBJ6.5A is rated at Moisture Sensitivity Level 1 (MSL-1) per J-STD-020, meaning it can be stored indefinitely at ambient conditions and placed directly into reflow without baking. This eliminates pre-reflow bake steps, reduces manufacturing cycle time, and avoids potential damage from moisture-induced popcorning during soldering - a key advantage for high-volume SMT assembly of automotive and industrial boards.
How does SMBJ6.5A comply with automotive EMC standards?
SMBJ6.5A is explicitly tested and rated to meet ISO 7637-2 for automotive transient immunity, covering Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling). Its 600 W peak pulse power rating, sub-1 µA leakage at 6.5 V, and 11.2 V clamping voltage enable direct integration into 12 V system designs without additional filtering components - simplifying compliance validation for ECU and body control modules.
SMBJ6.5A 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ6.5A FAQ
1.How can I place an order for SMBJ6.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ6.5A 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 SMBJ6.5A reliable?
The price and inventory of SMBJ6.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ6.5A is usually 5 days.
3.What payment methods are accepted for SMBJ6.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ6.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ6.5A?
SMBJ6.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ6.5A 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 SMBJ6.5A?
For technical support, including SMBJ6.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ6.5A requirements.
6.How does Aetrix verify that SMBJ6.5A is sourced from the original manufacturer or authorized distributors?
All SMBJ6.5A 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 SMBJ6.5A meets industry standards.
7.What is the process for return or replacement of SMBJ6.5A?
All SMBJ6.5A units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ6.5A, 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 SMBJ6.5A part is unused and in its original packaging.
Return procedure for SMBJ6.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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