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Taiwan Semiconductor Corporation SMBJ64CAH
- Part No.:
- SMBJ64CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ64CAH.pdf
- Description:
- TVS DIODE 64VWM 103VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,299
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Product details
Overview
SMBJ64CAH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 600W peak pulse power, 64V working stand-off voltage (VWM), and 114V maximum clamping voltage (VC) at 5.5A peak impulse current - designed for automotive-grade ESD and load-dump protection in power supply rails and CAN/LIN bus interfaces.
For engineers reviewing the SMBJ64CAH datasheet, SMBJ64CAH pinout, SMBJ64CAH application, or SMBJ64CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and sub-1ps response time under transient stress.
Technical Context
The SMBJ64CAH implements a glass-passivated silicon junction optimized for fast transient suppression with typical response time under 1.0ps and junction-to-ambient thermal resistance of 55°C/W. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating signal lines without polarity dependency.
It operates across -55°C to +150°C junction temperature range, supports steady-state power dissipation up to 3W at 25°C ambient, and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements - confirming suitability for reflow-soldered automotive PCB assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 71.1 / 78.6 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold |
| VC @ IPP | 114 V at 5.5 A - Clamped voltage during 10/1000µs surge, limiting downstream IC stress |
| PPK | 600 W - Peak pulse power handling per single non-repetitive 10/1000µs waveform |
| ID @ VWM | ≤1 µA - Leakage current at rated stand-off voltage, minimizing standby power loss |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| RθJA | 55 °C/W - Thermal resistance from junction to ambient, guiding heatsinking and layout decisions |
Pinout & Package
DO-214AA (SMB) surface-mount package with cathode band marking; dual-terminal construction with no internal polarity distinction for bidirectional operation - terminals are functionally symmetric and interchangeable in circuit placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (marked band) | Transient current path terminal | Marked end denotes conventional cathode; in bidirectional SMBJ64CAH, both terminals behave identically during positive/negative transients |
| Opposite terminal | Transient current return path | No functional distinction from marked terminal - full symmetry ensures identical clamping in either direction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupled noise) |
| Glass passivated junction | Enhances long-term reliability and stability of breakdown voltage under thermal/humidity stress |
| Sub-1ps response time | Clamps ESD events before sensitive logic or analog circuitry sustains damage |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally constrained applications |
Applications
| Automotive Power Rail Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting 12V battery-fed ECUs against load dump (ISO 7637-2 Pulse 5a) and alternator-induced surges. IC Role / Device Role / Timing Role: Primary clamping device placed at power entry point to limit rail voltage to ≤114V during 600W transients. Use Value: Prevents overvoltage failure of downstream DC-DC converters and microcontrollers without adding series impedance. | Use Scenario: Safeguarding high-speed CAN FD transceivers from ESD (IEC 61000-4-2) and coupled fast transients on differential bus lines. IC Role / Device Role / Timing Role: Bidirectional TVS placed across CAN_H–CAN_L to clamp ±114V spikes while preserving signal integrity. Use Value: Maintains <1pF junction capacitance (per Fig.5 at VR=0V), avoiding data rate degradation up to 5 Mbps. |
| Industrial Sensor Interface Protection | LED Driver Input Stage Protection |
Use Scenario: Shielding 4–20mA or RS-485 sensor nodes from lightning-induced surges in factory floor wiring. IC Role / Device Role / Timing Role: Front-end transient limiter on signal/power pair, absorbing energy before precision amplifiers or isolators. Use Value: Withstands repeated 10/1000µs pulses up to 5.5A without parameter shift, ensuring field longevity. | Use Scenario: Guarding constant-current LED drivers against inductive kickback from relay-controlled mains switching. IC Role / Device Role / Timing Role: Parallel-connected TVS across input capacitor to clamp 600W switching spikes before driver IC input stage. Use Value: Enables use of smaller bulk capacitors by limiting peak voltage to 114V, reducing board space and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ64CA | Same DO-214AC (SMA) package; 600W rating; VBR min/max = 71.1–78.6V; VC = 114V @ 5.5A - identical electrical specs but larger footprint (SMA vs SMB) | Requires PCB pad revision due to 4.5mm × 2.7mm SMA vs 4.2mm × 2.6mm SMB outline; not drop-in | Select when existing design uses SMA footprint or requires higher thermal mass margin |
| Vishay SMBJ64CA | Identical DO-214AA (SMB) package; same VWM (64V), VBR (71.1–78.6V), VC (114V); AEC-Q101 qualified; ISO 7637-2 compliant | No layout or schematic change required; fully interchangeable in automotive PCBs certified to same standards | Preferred second-source alternative with identical form, fit, and function - validated for same automotive stress profiles |
Compared with Littelfuse SMAJ64CA and Vishay SMBJ64CA, the SMBJ64CAH offers identical clamping performance and automotive qualification in the smaller SMB package, enabling higher board density; Vishay's version provides seamless replacement, while Littelfuse requires footprint adaptation.
Availability
SMBJ64CAH is available at Aetrix Electronics and suitable for automotive ECU designs, industrial CAN networks, LED lighting systems, and sensor interface modules requiring stable component supply with AEC-Q101 assurance and ISO 7637-2 compliance.
Supply support for SMBJ64CAH 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, and rectifiers - headquartered in Hsinchu, Taiwan, with global distribution and AEC-Q101 validation capabilities.
The SMBJH series was developed specifically for automotive and industrial transient suppression, emphasizing robustness under ISO 7637-2 pulses, low leakage, and high-temperature reliability - targeting power rail, communication bus, and sensor interface protection.
FAQ
What is the clamping voltage of SMBJ64CAH under a 10/1000µs surge?
The SMBJ64CAH clamps to a maximum of 114 V when subjected to a 10/1000µs waveform at 5.5 A peak impulse current (IPP), as specified in the Electrical Specifications table on page 3 of the Taiwan Semiconductor SMBJH Series datasheet. This value defines the upper voltage limit imposed on protected circuitry during standardized surge events, and it is measured with the device mounted on a standard FR-4 PCB per JEDEC guidelines.
Is SMBJ64CAH suitable for bidirectional signal line protection?
Yes, SMBJ64CAH is explicitly designed for bidirectional operation - indicated by the "CAH" suffix and confirmed in the Devices for Bipolar Applications section, which states that electrical characteristics apply in both directions. Its symmetrical VBR (71.1–78.6 V) and VC (114 V) ratings ensure consistent clamping for positive and negative transients, making it appropriate for CAN, LIN, RS-485, and other differential or AC-coupled interfaces.
Does SMBJ64CAH meet automotive qualification standards?
Yes, SMBJ64CAH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements - as stated in the FEATURES section of the datasheet. It also complies with JESD201 Class 2 whisker testing and J-STD-020 Level 1 moisture sensitivity, confirming suitability for lead-free reflow assembly in automotive production environments.
What is the maximum leakage current of SMBJ64CAH at its working voltage?
The SMBJ64CAH exhibits a maximum blocking leakage current (ID) of 1 µA when biased at its 64 V working stand-off voltage (VWM), as specified in the Electrical Specifications table. This low leakage ensures minimal power loss in always-on automotive modules and preserves battery life in sleep-mode applications where the device remains connected across live rails.
What package type does SMBJ64CAH use, and what are its key mechanical attributes?
SMBJ64CAH uses the DO-214AA (SMB) surface-mount package - measuring 4.2 mm × 2.6 mm × 2.3 mm - with matte tin-plated leads solderable per J-STD-002, UL 94V-0 molding compound, and polarity marked by a cathode band. Its compact size supports high-density layouts, and the glass-passivated junction enhances long-term stability under thermal cycling and humidity exposure.
SMBJ64CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- 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):
- 6.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ64CAH FAQ
1.How can I place an order for SMBJ64CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ64CAH 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 SMBJ64CAH reliable?
The price and inventory of SMBJ64CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ64CAH is usually 5 days.
3.What payment methods are accepted for SMBJ64CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ64CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ64CAH?
SMBJ64CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ64CAH 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 SMBJ64CAH?
For technical support, including SMBJ64CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ64CAH requirements.
6.How does Aetrix verify that SMBJ64CAH is sourced from the original manufacturer or authorized distributors?
All SMBJ64CAH 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 SMBJ64CAH meets industry standards.
7.What is the process for return or replacement of SMBJ64CAH?
All SMBJ64CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ64CAH, 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 SMBJ64CAH part is unused and in its original packaging.
Return procedure for SMBJ64CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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