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Taiwan Semiconductor Corporation SMBJ64C
- Part No.:
- SMBJ64C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ64C.pdf
- Description:
- 600W, 79V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:6,463
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Product details
Overview
SMBJ64C from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy ESD and surge protection in automotive and industrial power rails. It features a 64V working stand-off voltage (VWM), 71.1–86.9V breakdown voltage (VBR @ 1mA), 114V maximum clamping voltage (VC @ 5.5A), <1μA leakage at 64V, and sub-1ps response time.
For engineers reviewing the SMBJ64C datasheet, SMBJ64C pinout, SMBJ64C application, or SMBJ64C equivalent, this device is selected for robust overvoltage protection in 48V battery systems, CAN bus interfaces, and DC-DC converter input stages where fast clamping, low leakage, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance are required.
Technical Context
The SMBJ64C operates as a unidirectional avalanche diode with glass-passivated junction, optimized for clamping transients on positive-rail applications. Its 114V clamping voltage at 5.5A (10/1000µs waveform) ensures downstream ICs remain below absolute maximum ratings during load dump or inductive switching events.
Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, supporting continuous operation up to +150°C junction temperature. It meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, enabling standard reflow assembly without baking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before significant leakage; sets safe margin above 48V nominal rail. |
| VBR min/max | 71.1 / 86.9 V @ 1 mA - Confirmed avalanche onset range; guarantees reliable triggering across process variation and temperature. |
| VC @ IPP | 114 V @ 5.5 A (10/1000 µs) - Peak clamped voltage seen by protected circuit; defines worst-case stress during standardized surge. |
| PPK | 600 W - Non-repetitive peak pulse power handling; supports single-event load dump per ISO 7637-2 Pulse 5a. |
| ID @ VWM | < 1 µA - Ultra-low reverse leakage at rated stand-off; avoids unnecessary power loss in always-on systems. |
| Response time | < 1 ps - Sub-picosecond junction response enables effective suppression of ESD (IEC 61000-4-2) and fast transients. |
| Package | DO-214AA (SMB) - Industry-standard surface-mount outline with 0.090 g mass; compatible with automated pick-and-place. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode band marking polarity. Dimensions conform to JEDEC DO-214AA standard; recommended pad layout provided in Taiwan Semiconductor datasheet R2104.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground-reference terminal | Connected to system ground or low-side return path; completes clamping loop during positive transients. |
| Cathode | Protected-line terminal | Connected to line under protection (e.g., 48V supply rail); conducts avalanche current when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low leakage over temperature and lifetime; eliminates passivation-related drift in harsh environments. |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load disconnect), Pulse 2a/2b (battery feed interruption), and Pulse 3a/3b (switching noise); reduces need for additional filtering. |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; simplifies SMT manufacturing and lowers production cost. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives; supports environmentally compliant end-product certifications. |
Applications
| Automotive Power Rail Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting 48V battery management system (BMS) input against load dump pulses and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48V rail and chassis ground to clamp transients exceeding 64V. Use Value: Limits peak voltage to 114V during 5.5A 10/1000µs surge, preventing damage to upstream DC-DC controllers and monitoring ICs. |
Use Scenario: Safeguarding high-speed CAN FD transceivers from ESD and coupled noise on vehicle wiring harnesses. IC Role / Device Role / Timing Role: Bidirectional clamping (via SMBJ64CA variant) on CAN_H/CAN_L lines; SMBJ64C used on power-supply side only. Use Value: Sub-1ps response captures fast ESD events before transceiver input stages saturate, preserving signal integrity and bit error rate. |
| Industrial PLC Input Protection | LED Driver Surge Mitigation |
Use Scenario: Shielding programmable logic controller (PLC) digital input modules connected to 24V/48V field sensors. IC Role / Device Role / Timing Role: Unidirectional TVS on each input channel to absorb inductive kickback from solenoid or relay coils. Use Value: Withstands 100A peak forward surge (IFSM) and clamps at 114V, ensuring input protection remains functional after repeated switching events. |
Use Scenario: Securing constant-current LED driver inputs against lightning-induced surges in outdoor lighting systems. IC Role / Device Role / Timing Role: Primary surge shunt on AC-DC rectified output or DC bus feeding LED strings. Use Value: 600W peak power rating handles multi-kV line-to-ground surges per IEC 61000-4-5 Level 3, extending driver MTBF in streetlight applications. |
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 SMAJ64A | Same DO-214AC (SMA) package; 113V VC @ 5.5A; slightly lower PPK (400W); higher RθJA (65°C/W). | Lower power handling limits use in high-energy load dump scenarios; better suited for ESD-only zones. | Select SMAJ64A only if board space allows SMA footprint and surge energy is ≤400W. |
| ON Semiconductor 1.5SMC64A | DO-214AB (SMC) package; 113V VC @ 5.5A; 1500W PPK; larger footprint and higher thermal mass. | Supports higher repetition rates and longer surge durations but requires PCB area increase (~3× SMB size). | Choose 1.5SMC64A when system-level testing demands >600W single-pulse immunity or extended thermal cycling endurance. |
Compared with SMAJ64A and 1.5SMC64A, the SMBJ64C delivers optimal balance of 600W surge capacity, SMB footprint compatibility, and ISO 7637-2 validation-making it the preferred choice for space-constrained automotive and industrial modules requiring certified transient immunity without layout redesign.
Availability
SMBJ64C is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and LED lighting applications requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ64C 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.
The SMBJ series was developed specifically for AEC-Q101-qualified automotive and industrial surge protection, emphasizing reliability under thermal cycling, humidity, and high-energy transients per ISO 7637-2 and IEC 61000-4 standards.
FAQ
What is the polarity configuration of SMBJ64C?
The SMBJ64C is a unidirectional TVS diode, with cathode marked by a band on the DO-214AA package. It conducts only during positive transients on the cathode side relative to anode (ground), making it suitable for protecting positive power rails. Unlike bidirectional variants (e.g., SMBJ64CA), SMBJ64C does not suppress negative-going surges-this must be addressed separately in bipolar designs. The SMBJ64C datasheet specifies its VBR, VC, and leakage strictly for forward-biased avalanche operation.
Does SMBJ64C meet automotive qualification standards?
Yes, the SMBJ64C is AEC-Q101 qualified and explicitly tested to ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements. Its glass-passivated junction, MSL1 rating, and -55°C to +150°C operating range satisfy automotive environmental stress profiles. Taiwan Semiconductor's R2104 datasheet documents full test reports-including clamping waveforms and thermal derating curves-for use in engine control units, body electronics, and ADAS power domains where SMBJ64C serves as primary overvoltage guard.
How does SMBJ64C compare to SMBJ64A in clamping performance?
The SMBJ64C has a maximum clamping voltage (VC) of 114 V at 5.5 A (10/1000 µs), while the SMBJ64A variant clamps at 103 V under identical conditions-a 10.7% lower clamping level. This difference arises from tighter VBR tolerance (71.1–78.6 V for SMBJ64A vs. 71.1–86.9 V for SMBJ64C), enabling more precise voltage limiting. Designers selecting SMBJ64C accept wider VBR spread for broader process yield and lower cost, whereas SMBJ64A suits applications demanding stricter clamping consistency.
Can SMBJ64C be used in bidirectional signal line protection?
No-SMBJ64C is unidirectional and unsuitable for bidirectional signal lines like RS-485 or USB data pairs without external circuitry. For such applications, a bidirectional variant (e.g., SMBJ64CA) or back-to-back SMBJ64C devices are required. Using SMBJ64C alone on a floating or AC-coupled line risks failure during negative transients, as its anode cannot clamp below ground. The SMBJ64C datasheet explicitly restricts usage to single-polarity DC rail protection unless paired or replaced with CA-suffix parts.
What is the maximum allowable junction temperature for SMBJ64C during surge events?
The SMBJ64C has a maximum junction temperature (TJ) rating of +150°C, validated under steady-state and transient conditions. During a 10/1000 µs surge, self-heating is brief and localized; however, repeated surges or high ambient temperatures require thermal design consideration. With RθJC = 10°C/W and RθJA = 55°C/W, the SMBJ64C can sustain short pulses even at +125°C ambient-but sustained operation above +125°C ambient necessitates heatsinking or derating per Figure 2 in the R2104 datasheet. SMBJ64C's thermal specs ensure reliability in under-hood automotive locations.
SMBJ64C 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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 114V
- Current - Peak Pulse (10/1000µs):
- 5.5A
- 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)
SMBJ64C FAQ
1.How can I place an order for SMBJ64C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ64C 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 SMBJ64C reliable?
The price and inventory of SMBJ64C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ64C is usually 5 days.
3.What payment methods are accepted for SMBJ64C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ64C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ64C?
SMBJ64C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ64C 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 SMBJ64C?
For technical support, including SMBJ64C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ64C requirements.
6.How does Aetrix verify that SMBJ64C is sourced from the original manufacturer or authorized distributors?
All SMBJ64C 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 SMBJ64C meets industry standards.
7.What is the process for return or replacement of SMBJ64C?
All SMBJ64C units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ64C, 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 SMBJ64C part is unused and in its original packaging.
Return procedure for SMBJ64C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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