This Product Selection Guide contains information to help select products in the Thyristors category on DigiKey.com
Thyristor-based Transient Voltage Suppression (TVS) devices are over-voltage protection devices that approximate an open circuit under normal operating conditions. Application of a voltage across them in excess of some specific value called the breakover voltage causes them to enter a conductive state approximating a short circuit. This state persists until current flow through the device is reduced below a minimum value called “hold current” by some outside influence within the circuit.
SelectionCharacteristics
Voltage - Breakover: Characterizes the applied voltage at which a device enters into a conductive state.
Voltage - Off State: Indicates the maximum instantaneous voltage that may be repetitively/continuously applied to a device in a non-conducting state without causing damage.
Voltage - On State: Characterizes the voltage that appears across a device in an “on” or “tripped” state and conducting test current of manufacturer-defined magnitude and pulse width.
Current - Peak Pulse (8/20µs): The peak current value of the IEC61000-4-5 standard 8/20us waveform used to characterize the device, typically also a limiting maximum rating.
Current - Peak Pulse (10/1000µs): The maximum non-repetitive current that a device is rated to conduct. Refers to the peak value of a standard 10/1000us test waveform.
Current - Hold (Ih): Characterizes the minimum amount of fault current required to maintain a device in a tripped state.
Number of Elements: The number of individual channels the device can provide independent protection to.
Capacitance: The Equivalent Series Capacitance (ESC) of the part, for purposes of designing around parasitic capacitance in your circuits.
Mounting Type: Indicates how the device is attached.
Package / Case: Indicates the type of protective case used on an electronic component to allow easy handling, installation, and protection. This selection was determined to be the closest industry standard applicable to the suppliers device packaging. Typically it is best to check the actual dimensions from the datasheet rather than depend on this terminology when designing your circuit.
Supplier Device Package: This is what the manufacturer calls the package of this device. They are manufacturer specific. It is typically best to use the actual dimensions from the datasheets rather than to go by this terminology when designing your circuit.
ProductExamples
| MFR PART # | TISP4265M3BJR-S |
|---|---|
| DIGIKEY PART # | TISP4265M3BJR-STR-ND - Tape & Reel (TR) |
| MANUFACTURER | Bourns Inc. |
| DESCRIPTION | 200V Off-State 220 A Ipp TVS Thyristor DO-214AA, SMB |
| DATASHEET | Click Here |
| MFR PART # | LCP1521SRL |
|---|---|
| DIGIKEY PART # | 497-3781-2-ND - Tape & Reel (TR) |
| MANUFACTURER | STMicroelectronics |
| DESCRIPTION | Off-State 100 A Ipp TVS Thyristor 8-SOIC (0.154", 3.90mm Width) |
| DATASHEET | Click Here |
| MFR PART # | P2300MEL |
|---|---|
| DIGIKEY PART # | F10062-ND |
| MANUFACTURER | Littelfuse Inc. |
| DESCRIPTION | 180V Off-State 5 kA Ipp TVS Thyristor TO-218-3, TO-218AC |
| DATASHEET | Click Here |
| MFR PART # | P3100EALAP |
|---|---|
| DIGIKEY PART # | P3100EALAP-ND - Tape & Box (TB) |
| MANUFACTURER | Littelfuse Inc. |
| DESCRIPTION | 275V Off-State 150 A Ipp TVS Thyristor TO-226-2, TO-92-2 (TO-226AC) (Formed Leads) |
| DATASHEET | Click Here |
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