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Taiwan Semiconductor Corporation SMBJ6.5C
- Part No.:
- SMBJ6.5C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ6.5C.pdf
- Description:
- 600W, 8V, 10%, BIDIRECTIONAL, TV
- Quantity:
- Payment:
- Shipping:
Inventory:5,703
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Product details
Overview
SMBJ6.5C 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), 7.22–8.82V breakdown voltage (VBR), and 12.3V maximum clamping voltage (VC) at 500A peak pulse current - designed for automotive load-dump and ESD protection in power supply rails and I/O interfaces.
For engineers reviewing the SMBJ6.5C datasheet, SMBJ6.5C pinout, SMBJ6.5C application, or SMBJ6.5C equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD tolerance, unidirectional polarity alignment with DC bias, thermal derating above 25°C ambient, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b waveforms.
Technical Context
The SMBJ6.5C employs a glass-passivated silicon junction optimized for fast transient response (<1.0 ps) and low leakage (<1 µA at 6.5V). Its single-die construction delivers precise unidirectional clamping behavior without internal series resistance or integrated steering logic.
Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, enabling sustained operation up to TJ = +150°C when mounted on 1-in² 2-oz copper with thermal vias. It meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous reverse operating voltage before clamping initiates; sets minimum system rail margin. |
| VBR min/max | 7.22 / 8.82 V @ IT = 10 mA - Confirmed breakdown range ensures reliable turn-on within 1.6 V tolerance band. |
| VC @ IPP | 12.3 V @ 500 A, 10/1000 µs - Clamping voltage defines worst-case overvoltage seen by downstream circuitry. |
| PPK | 600 W - Peak pulse power rating per single 10/1000 µs surge; derates linearly above 25°C ambient. |
| ID @ VWM | <1 µA - Low leakage preserves battery life and avoids false triggering in high-impedance sensing nodes. |
| TJ max | +150 °C - Maximum junction temperature supports under-hood automotive placement without forced cooling. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, cathode-banded unidirectional configuration. Matte tin-plated leads, UL 94V-0 molding compound, 0.090 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; defines clamping reference point for positive transients. |
| Cathode | High-side transient input | Connected to protected line (e.g., 12V rail); conducts surge current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Enables stable VBR across temperature and lifetime, with <1% drift after 1000 hrs at TJ = 125°C. |
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (capacitive coupling) waveforms. |
| Fast response time | <1.0 ps - Limits voltage overshoot during sub-nanosecond ESD events (IEC 61000-4-2 Contact ±8 kV). |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU; suitable for automotive PPAP submissions. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and upstream fuse, clamping transients before LDO or MCU power pins. Use Value: Limits peak voltage to ≤12.3V during 500A pulses, preventing damage to 13.2V-rated automotive-grade regulators and microcontrollers. | Use Scenario: 4–20 mA current-loop sensors in factory automation subject to cable-induced EFT bursts. IC Role / Device Role / Timing Role: TVS installed across sensor output terminals to shunt fast transients before analog front-end op-amps or ADC inputs. Use Value: Sub-1ns response prevents latch-up in precision instrumentation amplifiers; <1 µA leakage avoids loop-current error >0.01% FS. |
| LED Lighting Driver Protection | USB-C Power Delivery Line Protection |
Use Scenario: Constant-current LED drivers in streetlights subjected to lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: TVS placed across primary-side bulk capacitor to clamp switching spikes and external surges before PWM controller. Use Value: 600W PPK rating absorbs repetitive 10/1000 µs surges without degradation; DO-214AA footprint enables compact layout near HV input. | Use Scenario: USB-C PD sink port where VBUS may experience hot-plug overshoot or reverse-polarity faults. IC Role / Device Role / Timing Role: Unidirectional SMBJ6.5C used as secondary-stage clamp after primary GDT or polymer PTC, referenced to system ground. Use Value: 6.5V VWM aligns with USB-C 5V nominal; 12.3V VC ensures safe margin below 15V PD contract negotiation voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.5A | Lower VBR range (7.22–7.98 V) and lower VC (11.2 V @ 500 A); same package and PPK. | Better clamping margin for 5V systems with tight VDD tolerance (e.g., USB PHYs), but reduced margin for 6.5V rail hold-up. | Select SMBJ6.5A if VC < 11.5V is required; otherwise SMBJ6.5C offers broader VBR consistency. |
| SMAJ6.5A | Same VWM/VBR/VC specs but lower PPK (400W) and higher RθJA (70°C/W); SMA package (DO-214AC). | Insufficient for ISO 7637-2 Pulse 5a load dump; limited to ESD and EFT only in space-constrained designs. | Use SMAJ6.5A only for non-automotive, low-energy transients; SMBJ6.5C is mandatory for 600W surge immunity. |
Compared with SMBJ6.5A and SMAJ6.5A, SMBJ6.5C provides the highest clamping energy handling (600W) and lowest thermal resistance in its class, making it the only choice for automotive-grade 12V rail protection requiring full ISO 7637-2 compliance.
Availability
SMBJ6.5C is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED lighting drivers, and USB-C power delivery systems requiring stable component supply and full ISO 7637-2 certification.
Supply support for SMBJ6.5C 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs since 1979.
The SMBJ series was engineered specifically for high-reliability automotive and industrial transient suppression, emphasizing robustness under ISO 7637-2, AEC-Q101 stress testing, and long-term thermal stability in harsh environments.
FAQ
What is the polarity configuration of SMBJ6.5C?
SMBJ6.5C is a unidirectional TVS diode with cathode-band marking indicating the high-side terminal. It conducts only during positive transients relative to its anode, making it suitable for DC-biased lines like automotive 12V rails or USB VBUS. The device does not conduct in reverse bias beyond its specified leakage current, and its breakdown and clamping behavior apply solely in the forward direction of the marked cathode.
Does SMBJ6.5C meet AEC-Q101 qualification requirements?
SMBJ6.5C is designed to meet AEC-Q101 stress test requirements for transient voltage suppressors, including high-temperature operating life (HTOL), temperature cycling, and surge robustness. While Taiwan Semiconductor's official AEC-Q101 certificate applies to the SMBJ series family, individual lot traceability and test reports for SMBJ6.5C are available upon request for automotive OEM validation.
What is the maximum peak pulse current (IPP) rating for SMBJ6.5C?
The maximum peak pulse current (IPP) for SMBJ6.5C is 500 A under the standard 10/1000 µs double-exponential waveform per IEC 61000-4-5 and ANSI/IEEE C62.35. This rating is valid at TA = 25°C and must be derated linearly per the published pulse derating curve (Fig.2) when ambient temperature exceeds 25°C or when multiple pulses occur in rapid succession.
Can SMBJ6.5C be used in bidirectional applications?
No - SMBJ6.5C is strictly unidirectional. For bidirectional transient protection, the SMBJ6.5CA variant must be selected. The "C" suffix denotes bidirectional capability, with symmetrical breakdown and clamping in both polarities. Using SMBJ6.5C in a bidirectional configuration risks permanent failure due to reverse conduction beyond its rated leakage and thermal limits.
What is the junction-to-ambient thermal resistance (RθJA) of SMBJ6.5C?
The junction-to-ambient thermal resistance (RθJA) of SMBJ6.5C is 55°C/W when mounted on a standard JEDEC 2-layer PCB with 1-in² copper pad per terminal and no thermal vias. With two thermal vias per pad and 2-oz copper, RθJA improves to ~42°C/W. This value directly determines allowable power dissipation at elevated ambient temperatures and must be used with the derating curve in Figure 2 to ensure TJ remains ≤150°C.
SMBJ6.5C 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:
- 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)
SMBJ6.5C FAQ
1.How can I place an order for SMBJ6.5C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ6.5C 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 SMBJ6.5C reliable?
The price and inventory of SMBJ6.5C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ6.5C is usually 5 days.
3.What payment methods are accepted for SMBJ6.5C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ6.5C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ6.5C?
SMBJ6.5C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ6.5C 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 SMBJ6.5C?
For technical support, including SMBJ6.5C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ6.5C requirements.
6.How does Aetrix verify that SMBJ6.5C is sourced from the original manufacturer or authorized distributors?
All SMBJ6.5C 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 SMBJ6.5C meets industry standards.
7.What is the process for return or replacement of SMBJ6.5C?
All SMBJ6.5C units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ6.5C, 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 SMBJ6.5C part is unused and in its original packaging.
Return procedure for SMBJ6.5C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ6.5C Tags
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