SMAJ14A

SMAJ14A is a 14-volt, unidirectional transient-voltage-suppressor (TVS) diode in the SMA package (DO-214AC). It protects sensitive electronics from high-voltage transients on DC rails and data lines by remaining reverse-biased during normal operation and avalanche-clamping when surges exceed its standoff voltage (about 14 V). The “A” denotes the unidirectional version; the device is connected across the line to ground (cathode to the supply line, anode to ground). It offers fast response (nanoseconds) and high peak pulse current to absorb surge energy, making it suitable for automotive 12 V systems, telecom/industrial power rails, and interfaces like USB, CAN, or Ethernet where spikes or ESD may occur. When selecting, verify VRWM ~14 V, VBR and clamp voltage at the expected surge current, Ipp rating, and package/reflow compatibility (DO-214AC). Common suppliers include Littelfuse, Vishay, and ON Semiconductor.

Do you want exact cross-reference part numbers from other brands? If yes, please specify which suppliers you want (e.g., ON Semiconductor, ST, Nexperia, Bourns, Vishay, Littelfuse). SMAJ14A is a 14 V bidirectional TVS diode in the SMA package; equivalent parts are other 14 V bidirectional TVS diodes with similar peak-pulse ratings.

SMAJ14A is a unidirectional TVS diode in an SMA (DO-214AC) package. Key features:
- Stand-off voltage (VWM): 14 V
- Peak pulse power: 400 W (8/20 μs)
- Fast response time: nanoseconds
- Low leakage in normal operation
- Wide operating temperature: typically -55°C to +125°C
- RoHS compliant and lead-free
- Package: SMA (DO-214AC), suitable for surface-mount board protection
- Used for transient suppression on power lines, data lines, and telecom/automotive interfaces
Note: exact clamping voltage, breakdown range, and capacitance are specified in the manufacturer’s datasheet and vary slightly by lot and vendor.

- Pin count: 2 pins (DO-214AA SMA package)
- Function: A surface-mount transient-voltage-suppressor (TVS) diode used for surge/ESD protection; SMAJ14A is a unidirectional TVS with ~14 V stand-off on the protected line.

- Manufacturer: Littelfuse, Inc.
- What kind of company: A global specialty electronics company that designs and manufactures circuit-protection solutions (fuses, TVS diodes like SMAJ14A, ESD protection, etc.), publicly traded and headquartered in the Chicago area.

- Automotive 12V/14V electrical systems
- Industrial and consumer electronics DC power rails
- Power-input protection for adapters and DC-DC converters
- Data/communication interfaces (USB, Ethernet, RS-485/RS-232) against surges and ESD
- Renewable-energy and battery systems (solar, inverters, BMS)

SMAJ14A uses the SMA package (DO-214AA), a small surface-mount TVS diode.