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Taiwan Semiconductor Corporation SMBJ6.5
- Part No.:
- SMBJ6.5
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ6.5.pdf
- Description:
- 600W, 8V, 10%, UNIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:4,502
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Product details
Overview
SMBJ6.5 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection in DC power rails and signal lines. It features 600W peak pulse power rating, 6.5V working stand-off voltage, 7.22–8.82V breakdown voltage at 10mA, 12.3V maximum clamping voltage at 500A peak current, and <1μA leakage above 10V - deployed in automotive lighting control modules to safeguard microcontrollers against load-dump transients.
For engineers reviewing the SMBJ6.5 datasheet, SMBJ6.5 pinout, SMBJ6.5 application, or SMBJ6.5 equivalent, key selection criteria include clamping voltage margin versus IC VDD tolerance, unidirectional polarity alignment with DC rail direction, thermal derating above 25°C ambient, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b test profiles.
Technical Context
The SMBJ6.5 operates as a silicon avalanche diode with glass-passivated junction, triggering conduction when reverse voltage exceeds its specified VBR range (7.22–8.82V @ 10mA). Its fast response time (<1.0ps) enables suppression of ESD and electrical fast transients before downstream ICs experience overstress.
Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, supporting operation up to +150°C junction temperature. It meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, enabling compatibility with standard reflow soldering processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5V - Maximum continuous reverse operating voltage; must exceed system nominal DC rail (e.g., 5V or 6V logic supply) to avoid leakage-induced power loss. |
| VBR @ IT=10mA | 7.22–8.82V - Breakdown threshold range; ensures reliable turn-on before sensitive circuitry exceeds absolute maximum ratings. |
| VC @ IPP=500A | 12.3V - Clamped voltage under 10/1000µs surge; defines worst-case overvoltage seen by protected IC during full-rated transient. |
| IPP (max) | 500A - Peak impulse current capacity; determines survivability against ISO 7637-2 Pulse 2b (inductive switch-off) events. |
| PPK | 600W - Non-repetitive peak pulse power; sets energy absorption limit per transient event without junction failure. |
| ID @ VWM | <1µA - Reverse blocking leakage at 6.5V; negligible power dissipation in standby, critical for battery-powered systems. |
| Junction Temp Range | −55°C to +150°C - Enables deployment in under-hood automotive environments and industrial motor drive enclosures. |
Pinout & Package
DO-214AA (SMB) surface-mount package: cathode-banded end denotes terminal 1 (cathode), opposite end is anode (terminal 2); matte tin-plated leads compliant with J-STD-002 solderability; 0.090g mass; UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 2) | Forward current path / low-side reference | Connected to ground or return path; establishes reference for clamping action during reverse surge. |
| Cathode (Terminal 1, banded end) | Protected line connection / high-side input | Connected to DC rail or signal line requiring protection; conducts avalanche current to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| Clamping voltage ≤12.3V @ 500A | Provides ≥1.7V margin below typical 14V automotive MCU VDD absolute max, preventing latch-up or oxide damage. |
| Response time <1.0ps | Suppresses nanosecond-scale ESD events (IEC 61000-4-2) before propagation into digital logic or analog front-ends. |
| ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance | Validates robustness against real-world automotive transients including load dump, alternator ripple, and inductive kickback. |
| Moisture Sensitivity Level 1 | Eliminates bake requirements prior to SMT assembly, reducing manufacturing cost and process complexity. |
Applications
| Automotive Lighting Control | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LED driver ICs in headlamp modules subjected to battery load-dump pulses up to 35V. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12V supply rail and ground, clamping surges before they reach buck controller inputs. Use Value: Limits voltage excursion to ≤12.3V during 500A transients, preserving driver IC integrity and avoiding field returns due to surge-induced failure. |
Use Scenario: Safeguarding 24V digital input channels on programmable logic controllers exposed to relay coil flyback. IC Role / Device Role / Timing Role: TVS connected across input terminals to shunt inductive energy from 24V solenoid switching. Use Value: Absorbs 600W peak energy without degradation, maintaining channel accuracy and eliminating false-triggering caused by voltage spikes. |
| USB Power Delivery Interface | Smart Meter Communication Port |
Use Scenario: ESD protection on 5V VBUS line of USB-C receptacles in portable medical devices. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to ground, activated only during positive transients on VBUS. Use Value: Sub-1μA leakage preserves battery life; 12.3V clamping prevents overvoltage damage to USB PD controller and Type-C port ICs. |
Use Scenario: Transient suppression on RS-485 differential pair (A/B) and 3.3V auxiliary supply in utility smart meters. IC Role / Device Role / Timing Role: SMBJ6.5 used on 3.3V supply rail to protect metrology SoC and isolated power converters from lightning-induced surges. Use Value: Withstands repeated 500A surges per IEC 61000-4-5, ensuring >15-year field reliability in outdoor meter installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ6.5A | Same DO-214AC (SMA) package; 12.3V clamping at 500A; 600W rating; bidirectional variant available (SMAJ6.5CA). | Lower thermal resistance (RθJA = 50°C/W vs. 55°C/W) but smaller 2.5mm × 4.5mm footprint limits copper pour area for heat spreading. | Select when board space is constrained and thermal management via PCB copper is limited; verify SMA pad layout compatibility. |
| ON Semiconductor 1.5SMC6.5A | DO-214AB (SMC) package; 12.3V clamping at 500A; 600W rating; higher IFSM (100A) but larger 7.1mm × 6.2mm body. | Higher steady-state power dissipation (5W vs. 3W) supports longer surge duration; not suitable for dense automotive PCBs with tight height clearance. | Select for industrial applications requiring extended surge endurance or where mechanical robustness outweighs size constraints. |
Compared with SMAJ6.5A and 1.5SMC6.5A, the SMBJ6.5 offers optimal balance of compact DO-214AA footprint, proven automotive qualification (ISO 7637-2), and sufficient thermal margin for most 12V/24V embedded systems - making it preferred for space-constrained automotive and industrial designs requiring AEC-Q200-aligned reliability.
Availability
SMBJ6.5 is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, and USB power delivery interface applications requiring stable component supply, consistent parametric performance, and RoHS/halogen-free compliance.
Supply support for SMBJ6.5 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 headquartered in Hsinchu, Taiwan, specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SMBJ series was developed specifically for high-reliability transient suppression in automotive electronics, emphasizing ISO 7637-2 compliance, moisture resilience, and automated SMT compatibility - targeting 12V/24V power rail protection in ECUs, lighting modules, and body control units.
FAQ
What is the polarity configuration of SMBJ6.5?
The SMBJ6.5 is a unidirectional TVS diode, with cathode indicated by a band on the DO-214AA package. It conducts only during reverse-biased overvoltage events - meaning the banded end connects to the protected line (e.g., 12V rail), and the unbanded end connects to ground. This configuration blocks forward current and clamps negative transients on positive rails, making it ideal for DC power line protection where polarity is fixed.
Does SMBJ6.5 meet automotive transient immunity standards?
Yes, SMBJ6.5 meets ISO 7637-2 Pulse 1 (capacitive coupling), Pulse 2a (battery feed interruption), Pulse 2b (inductive load switch-off), Pulse 3a (supply line spikes), and Pulse 3b (ground line spikes). Its 600W peak power rating and 12.3V clamping voltage at 500A ensure compliance with these test profiles when properly mounted with adequate PCB copper pour for thermal dissipation.
How does SMBJ6.5 differ from SMBJ6.5A?
The SMBJ6.5A has tighter VBR tolerance (7.22–7.98V vs. 7.22–8.82V for SMBJ6.5) and lower clamping voltage (11.2V vs. 12.3V at 500A), achieved through enhanced process control. Both share identical package, power rating, and application scope; SMBJ6.5A is selected when stricter voltage margin control is required - such as protecting 3.3V logic rails with narrow VDD tolerances.
What is the maximum operating temperature for SMBJ6.5?
The SMBJ6.5 has a maximum junction temperature (TJ) of +150°C and storage temperature range of −55°C to +150°C. Its RθJA of 55°C/W means that at 25°C ambient, power dissipation must remain below 2.27W to stay within thermal limits - though in transient suppression, power is non-repetitive, so thermal design focuses on single-pulse energy handling rather than steady-state dissipation.
Is SMBJ6.5 RoHS and halogen-free compliant?
Yes, SMBJ6.5 is RoHS compliant and halogen-free per IEC 61249-2-21. The molding compound meets UL 94V-0 flammability rating, and terminals are matte tin-plated per J-STD-002 for lead-free solder compatibility. These attributes support compliance with EU environmental directives and enable use in green electronics manufacturing without material declaration exceptions.
SMBJ6.5 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:
- 12.3V
- Current - Peak Pulse (10/1000µs):
- 51A
- 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)
SMBJ6.5 FAQ
1.How can I place an order for SMBJ6.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ6.5 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 SMBJ6.5 reliable?
The price and inventory of SMBJ6.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ6.5 is usually 5 days.
3.What payment methods are accepted for SMBJ6.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ6.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ6.5?
SMBJ6.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ6.5 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 SMBJ6.5?
For technical support, including SMBJ6.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ6.5 requirements.
6.How does Aetrix verify that SMBJ6.5 is sourced from the original manufacturer or authorized distributors?
All SMBJ6.5 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 SMBJ6.5 meets industry standards.
7.What is the process for return or replacement of SMBJ6.5?
All SMBJ6.5 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ6.5, 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 SMBJ6.5 part is unused and in its original packaging.
Return procedure for SMBJ6.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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