1. Product Overview:

️· Type: Transient Voltage Suppressors (TVS) – designed to protect circuits from voltage spikes and surges.
️· Series: HSMBJSAC Series - characterized by low capacitance, which is crucial for high-speed data lines.
️· Application: Protection of sensitive electronic components (e.g., microcontrollers, data lines) from overvoltage conditions.

2. Key Features:

️· Low Capacitance: Critical for high-speed data transmission lines to minimize signal distortion.
️· Bidirectional: Can handle voltage transients from either polarity.
️· Fast Response Time: Quickly clamps voltage to protect circuits.
️· Various Voltage Ratings: Available in a range of reverse standoff voltages (VWM) to suit different application requirements.

3. Electrical Characteristics (Key Parameters):

Parameter	Description	Units
VWM (Reverse Standoff Voltage)	Voltage at which the TVS begins to conduct.	Volts
V(BR) (Breakdown Voltage)	Voltage at which the TVS conducts at a specified current (1mA).	Volts
ID (Max. Standby Current)	Maximum current flowing through the TVS under normal operating conditions (at VWM).	µA (microamps)
VC (Max. Clamping Voltage)	Voltage at which the TVS clamps the transient voltage.	Volts
IPP (Max. Peak Pulse Current)	Maximum current the TVS can handle during a transient event.	Amps
C (Capacitance)	Capacitance of the TVS device – important for signal integrity.	pF (picofarads)
VWIB (Working Inverse Blocking Voltage)	Maximum voltage allowed without triggering leakage current.	Volts
VPIB (Peak Inverse Blocking Voltage)	Maximum Voltage allowed for the device to operate without damage.	Volts

Important Notes regarding Characteristics:

️· Clamping Factor: The ratio of clamping voltage (VC) to breakdown voltage (V(BR)) is typically around 1.2-1.4 at full power, and lower at 50% power. This indicates how effectively the TVS clamps the voltage.
️· Note 1: TVS devices should be selected based on their VWM rating, which must be greater than or equal to the peak operating voltage.
️· Note 2: Testing should be done in the avalanche direction (not forward).

4. Schematic Applications:

️· Basic Configuration: TVS diode connected directly across the circuit to be protected.
️· With Rectifier Diode: For unidirectional protection, a low-capacitance rectifier diode can be used in parallel with the TVS.
️· Bidirectional Protection: Two TVS diodes connected back-to-back (anti-parallel).

5. Mechanical Dimensions:

️· The datasheet lists dimensions (A, B, C, D, E, F, G) in both inches and millimeters. These describe the physical size and lead configuration of the device.

6. Figures & Diagrams:

️· Figure 1: A graph showing pulse width and time parameters.
️· Figure 2 & 3: Diagrams illustrating lead temperature versus time.
️· Figure 5: A graph showing Transient Voltage Suppression.

Overall Purpose:

This datasheet provides detailed technical information for engineers and designers to properly select and implement the HSMBJSAC series TVS diodes for transient voltage protection in electronic circuits. It emphasizes the importance of low capacitance for high-speed applications and offers guidance on various circuit configurations.