SIDACtor® Protection Thyristors

Littelfuse SIDACtor® Protection Thyristors are thyristor devices used to protect sensitive circuits from electrical disturbances caused by lightning-induced surges, inductive-coupled spikes, and AC power fault conditions. The unique structure and characteristics of the thyristor are used to create an overvoltage protection device with precise and repeatable turn-on characteristics with low voltage overshoot and high surge current capabilities. SIDACtor components are solid state crowbar devices with a patented ion implant technology that ensures effective protection within nanoseconds. Littelfuse SIDACtor Protection Thyristors include a wide range of semiconductor protection thyristor over-voltage transient suppression devices designed to serve requirements of telecom and data networking equipment applications.

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Qty. RoHS ECAD Model Breakover Voltage VBO
Breakover Current IBO Max
Non Repetitive On-State Current
Rated Repetitive Off-State Voltage VDRM
Off-State Leakage Current @ VDRM IDRM
Holding Current Ih Max
On-State Voltage
Off-State Capacitance CO
Minimum Operating Temperature
Maximum Operating Temperature
Mounting Style
Package / Case
Qualification
Packaging
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor MicroCapacitance
Datasheet
5,628In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

50 mA SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 30V 2.5kA Bi-Dir
Datasheet
2,554In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

45 V 800 mA 250 A 30 V 5 uA 50 mA 4 V 150 pF - 65 C + 150 C SMD/SMT DO-214AB Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 58V 3000A DO214AB RoHS
Datasheet
2,991In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000
800 mA 58 V 5 uA 50 mA 4 V 550 pF - 65 C + 125 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 58V
Datasheet
5,336In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

77 V 800 mA 50 A 58 V 5 uA 150 mA 4 V 50 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 65V 3000A DO214AB RoHS
Datasheet
3,000In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000
800 mA 65 V 5 uA 50 mA 4 V 550 pF - 65 C + 125 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 75V 3000A DO214AB RoHS
Datasheet
3,989In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000
800 mA 75 V 5 uA 50 mA 4 V 550 pF - 65 C + 125 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 90V 3000A DO214AB RoHS
Datasheet
2,992In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000
800 mA 90 V 5 uA 50 mA 4 V 450 pF - 65 C + 125 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 90V
Datasheet
20,795In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

130 V 800 mA 50 A 90 V 5 uA 150 mA 4 V 40 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 120V 3000A DO214AB RoHS
Datasheet
3,003In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000
800 mA 120 V 5 uA 50 mA 4 V 450 pF - 65 C + 125 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD Power Inserters 5 kA SIDACtor
Datasheet
490In Stock
Min.: 1
Mult.: 1

180 V 800 mA 400 A 140 V 5 uA 50 mA 4 V 400 pF to 650 pF - 40 C + 85 C Through Hole SMTO-218 Tube
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 140V 3000A DO214AB RoHS
Datasheet
2,998In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000
800 mA 140 V 5 uA 50 mA 4 V 450 pF - 65 C + 125 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 155V 3000A DO214AB RoHS
Datasheet
2,961In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000
800 mA 155 V 5 uA 50 mA 4 V 450 pF - 65 C + 125 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD Bi 180V 5000A
Datasheet
376In Stock
Min.: 1
Mult.: 1

260 V 800 mA 400 A 180 V 5 uA 50 mA 4 V 350 pF to 600 pF - 40 C + 85 C Through Hole SMTO-218 Tube
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 180V 3000A DO214AB RoHS
Datasheet
2,298In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

180 V 4 V 150 pF - 65 C + 150 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 180V 3000A DO214AB RoHS
Datasheet
1,747In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000
800 mA 180 V 5 uA 50 mA 4 V 450 pF - 65 C + 125 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 220V 3000A DO214AB RoHS
Datasheet
2,908In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000
800 mA 220 V 5 uA 50 mA 4 V 450 pF - 65 C + 125 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 275V 3000A DO214AB RoHS
Datasheet
1,968In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

275 V 4 V 150 pF - 65 C + 150 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 50A 275V
Datasheet
13,961In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

350 V 800 mA 20 A 275 V 5 uA 150 mA 4 V 20 pF to 35 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 275V
Datasheet
8,244In Stock
2,500Expected 10/1/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

350 V 800 mA 30 A 275 V 5 uA 150 mA 4 V 30 pF to 70 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD HIGH SURGE 275V 1000A
Datasheet
2,526In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

350 V 800 mA 50 A 275 V 5 uA 50 mA 4 V 45 pF to 70 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 275V 3000A DO214AB RoHS
Datasheet
2,508In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000
800 mA 320 V 5 uA 50 mA 4 V 450 pF - 65 C + 125 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 350V 3000A DO214AB RoHS
Datasheet
683In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000
800 mA 350 V 5 uA 50 mA 4 V 450 pF - 65 C + 125 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 550V 50A DO214 2L SIDACtor Bi
Datasheet
1,638In Stock
5,000Expected 12/1/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

700 V 800 mA 20 A 550 V 5 uA 120 mA 8 V 10 pF to 25 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel

Littelfuse Thyristor Surge Protection Devices - TSPD 19V 80A SOT23-6L Sidactor
Datasheet
3,732In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

40 mA SMD/SMT SOT-23-6 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SEP Ethernet 100A Biasd Protec. Device
Datasheet
4,026In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

50 mA SMD/SMT QFN-2 Reel, Cut Tape, MouseReel