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Taiwan Semiconductor Corporation SMBJ64CA
- Part No.:
- SMBJ64CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ64CA.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,033
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Product details
Overview
SMBJ64CA from Taiwan Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It features a 64 V working stand-off voltage (VWM), 71.1–86.9 V breakdown voltage (VBR), 114 V maximum clamping voltage (VC) at 5.5 A peak pulse current, and 600 W peak pulse power rating with <1.0 ps response time. It is used in automotive power supply rails to suppress ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMBJ64CA datasheet, SMBJ64CA pinout, SMBJ64CA application, or SMBJ64CA equivalent, key selection criteria include bidirectional clamping capability, DO-214AA (SMB) package compatibility, 150°C junction temperature rating, low leakage (<1 µA above 10 V), and compliance with automotive transient immunity standards.
Technical Context
The SMBJ64CA operates as a bipolar junction TVS diode with symmetrical avalanche breakdown in both forward and reverse directions, enabling robust protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance and low leakage across temperature.
It delivers 600 W non-repetitive peak impulse power under 10/1000 µs waveform, with thermal resistance RθJA = 55 °C/W and RθJC = 10 °C/W, supporting reliable operation in compact PCB layouts with moderate airflow. Clamping performance is validated per ANSI/IEEE C62.35 and meets ISO 7637-2 test pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous DC or RMS voltage the device blocks without conduction. |
| VBR min/max | 71.1 V / 86.9 V @ 1 mA - Confirmed breakdown threshold range ensuring predictable turn-on during overvoltage events. |
| VC @ IPP | 114 V @ 5.5 A - Clamped voltage seen by protected circuit during 10/1000 µs surge, limiting stress on downstream components. |
| PPK | 600 W - Peak surge energy absorption capacity under standardized 10/1000 µs waveform. |
| ID @ VWM | <1 µA - Ultra-low leakage current preserves system efficiency and battery life in always-on circuits. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and industrial enclosures without derating. |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.090 g mass and J-STD-002 solderable matte tin leads. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with cathode band marking; dual axial terminals; UL 94V-0 rated compound; polarity indicated by band (bidirectional symmetry means band denotes common reference, not unidirectional cathode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity - no orientation dependency in layout. |
| Cathode band (marking) | Reference indicator | Provides visual polarity reference per JEDEC standard; electrically irrelevant for SMBJ64CA due to bidirectional symmetry. |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Enables suppression before sensitive ICs experience damaging voltage overshoot. |
| ISO 7637-2 compliance | Pulse 1/2a/2b/3a/3b qualified - Validated for automotive load dump and inductive switching immunity requirements. |
| Moisture sensitivity level | Level 1 (J-STD-020) - No dry-pack or bake-out required prior to reflow, simplifying SMT assembly. |
| RoHS & halogen-free | Compliant per IEC 61249-2-21 - Meets environmental regulations for automotive and industrial end equipment. |
| Low clamping ratio | VC/VBR ≈ 1.33 - Tight voltage margin between breakdown and clamping ensures minimal overvoltage exposure. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12 V/24 V vehicle battery line exposed to load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed upstream of DC-DC converters and microcontrollers. Use Value: Limits voltage to ≤114 V during ISO 7637-2 Pulse 5a (load dump), preventing damage to 3.3 V/5 V logic and analog front-ends. |
Use Scenario: 4–20 mA current loop or RS-485 bus in factory automation systems subject to EFT and lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge shunt at connector entry point, protecting transceivers and ADC inputs. Use Value: Sub-1.0 ps response ensures clamping occurs before 10/1000 µs transients exceed 114 V, preserving signal integrity and isolation barrier ratings. |
| LED Driver Overvoltage Clamp | USB Port ESD & Surge Protection |
Use Scenario: Constant-current LED driver input subjected to inductive kickback from relay-controlled loads. IC Role / Device Role / Timing Role: Parallel-connected TVS across input capacitor to absorb repetitive switching spikes. Use Value: 600 W peak power rating sustains repeated 10/1000 µs surges up to 5.5 A without degradation, extending driver lifetime. |
Use Scenario: USB 2.0 data lines and VBUS in portable medical devices requiring IEC 61000-4-2 Level 4 ESD and IEC 61000-4-4 EFT immunity. IC Role / Device Role / Timing Role: Bidirectional TVS pair (D+/D−) plus single device on VBUS to suppress differential and common-mode transients. Use Value: Symmetrical clamping ensures equal protection for both data line polarities, while 1 µA leakage avoids USB suspend current violations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ64CA | Same DO-214AC (SMA) package; 115 V VC @ 5.4 A; slightly higher clamping voltage and lower PPK (400 W). | Lower surge rating limits use in high-energy automotive load dump; suitable for consumer-grade 24 V systems. | Select SMAJ64CA only if board space allows SMA footprint and peak surge energy is ≤400 W. |
| ON Semiconductor SMCJ64CA | DO-214AB (SMC) package; 113 V VC @ 5.6 A; identical 600 W rating but larger footprint (7.11 × 6.22 mm vs. SMB's 4.57 × 3.94 mm). | Higher thermal mass supports longer surge duration but requires PCB area increase; better for industrial 48 V systems. | Choose SMCJ64CA when enhanced thermal dissipation is needed and layout permits larger SMC outline. |
Compared with SMBJ64CA, SMAJ64CA offers smaller size but reduced surge handling, while SMCJ64CA provides identical electrical performance with superior thermal robustness at the cost of board area - making SMBJ64CA the optimal balance of 600 W capability, SMB footprint, and automotive qualification.
Availability
SMBJ64CA is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, LED driver overvoltage clamp, and USB port ESD & surge protection requiring stable component supply and full traceability.
Supply support for SMBJ64CA 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 automotive, industrial, and computing markets.
The SMBJ series was developed specifically for AEC-Q101-compliant, high-reliability transient suppression in space-constrained automotive and industrial PCBs, emphasizing fast response, low leakage, and standardized SMB packaging.
FAQ
What is the clamping voltage of SMBJ64CA and how is it measured?
The SMBJ64CA has a maximum clamping voltage (VC) of 114 V, measured at 5.5 A peak pulse current under the standardized 10/1000 µs waveform. This value is guaranteed per the datasheet's Electrical Specifications table and reflects the highest voltage the protected circuit will experience during a surge event. The SMBJ64CA maintains this clamping performance across its operating temperature range and is validated per ANSI/IEEE C62.35.
Is SMBJ64CA unidirectional or bidirectional, and how does that affect PCB layout?
SMBJ64CA is a bidirectional TVS diode, indicated by the "CA" suffix and confirmed by symmetric VBR min/max values (71.1–86.9 V) in both polarities. This eliminates polarity sensitivity during placement - the cathode band marking is for reference only and does not constrain orientation. Layout requires no directional routing, simplifying design for AC-coupled or floating interfaces where transient polarity is unpredictable.
Does SMBJ64CA meet automotive transient immunity standards?
Yes, SMBJ64CA meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements, as explicitly stated in the Features section of the Taiwan Semiconductor datasheet. Its 600 W peak pulse power rating, fast <1.0 ps response, and 114 V clamping voltage are engineered to protect ECUs, body control modules, and infotainment systems against real-world automotive transients without additional external filtering.
What is the maximum leakage current of SMBJ64CA at its working voltage?
The SMBJ64CA exhibits a maximum blocking leakage current (ID) of 1 µA at its 64 V working stand-off voltage (VWM), tested at TA = 25°C. This ultra-low leakage ensures minimal power loss in battery-powered or energy-sensitive applications and remains well below typical microcontroller input leakage thresholds, avoiding false triggering or signal corruption.
Can SMBJ64CA be used in place of SMBJ64A, and what is the key difference?
No - SMBJ64CA and SMBJ64A are functionally distinct: SMBJ64CA is bidirectional (symmetric clamping), while SMBJ64A is unidirectional (asymmetric, with cathode-defined polarity). Substituting SMBJ64CA for SMBJ64A introduces no polarity constraint but may alter circuit behavior in DC-biased paths. Always verify system-level polarity requirements before interchange; the SMBJ64CA datasheet confirms bidirectional operation via dual-direction VBR specification.
SMBJ64CA 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:
- 103V
- Current - Peak Pulse (10/1000µs):
- 5.8A
- 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)
SMBJ64CA FAQ
1.How can I place an order for SMBJ64CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ64CA 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 SMBJ64CA reliable?
The price and inventory of SMBJ64CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ64CA is usually 5 days.
3.What payment methods are accepted for SMBJ64CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ64CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ64CA?
SMBJ64CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ64CA 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 SMBJ64CA?
For technical support, including SMBJ64CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ64CA requirements.
6.How does Aetrix verify that SMBJ64CA is sourced from the original manufacturer or authorized distributors?
All SMBJ64CA 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 SMBJ64CA meets industry standards.
7.What is the process for return or replacement of SMBJ64CA?
All SMBJ64CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ64CA, 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 SMBJ64CA part is unused and in its original packaging.
Return procedure for SMBJ64CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ64CA Tags
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