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 30A 8V Baseband Voice-DS1
Datasheet
12In Stock
5,000Expected 10/28/2026
MouseReel Available
Min.: 1
Mult.: 1
: 5,000

25 V 800 mA 20 A 6 V 5 uA 50 mA 4 V 25 pF to 35 pF - 40 C + 85 C SMD/SMT DO-214AC Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 100mA 500A Dual Negative
Datasheet
698In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

100 mA - 40 C + 125 C SMD/SMT Modified-MS-013-6 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 50A 25V
Datasheet
1,061In 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 100A 25V
Datasheet
432In Stock
2,500Expected 8/10/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

40 V 800 mA 30 A 25 V 5 uA 50 mA 4 V 110 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 25V
Datasheet
2,251In Stock
5,000Expected 9/9/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

40 V 800 mA 50 A 25 V 5 uA 50 mA 4 V 110 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 25V 25-45pF
Datasheet
1,744In Stock
2,500Expected 11/30/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

50 mA SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD Modified TO-220 SIDACtor
Datasheet
920In Stock
Min.: 1
Mult.: 1

40 V, 80 V 800 mA 20 A 25 V, 50 V 5 uA 50 mA 4 V 10 pF to 20 pF, 15 pF to 145 pF - 40 C + 85 C Through Hole TO-220-2 Bulk
Littelfuse Thyristor Surge Protection Devices - TSPD 50A 58V
Datasheet
57In Stock
5,000On Order
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

77 V 800 mA 20 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 500A 58V
Datasheet
1,241In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

77 V 800 mA 30 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 500A 58V
Datasheet
255In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

150 mA SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD HIGH SURGE 58V 1000A
Datasheet
2,269In Stock
2,500Expected 8/13/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

77 V 800 mA 50 A 58 V 5 uA 50 mA 4 V 100 pF to 160 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 65V
Datasheet
117In Stock
5,000Expected 11/3/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

88 V 800 mA 50 A 65 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 500A 75V
Datasheet
241In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

150 mA SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 75V
Datasheet
557In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

98 V 800 mA 20 A 75 V 5 uA 120 mA 5 V 70 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 1000A 90V
Datasheet
287In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

130 V 800 mA 50 A 90 V 5 uA 50 mA 4 V 75 pF to 115 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 90V
Datasheet
2,243In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

130 V 800 mA 50 A 95 V 5 uA 120 mA 5 V 70 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 140V
Datasheet
2,682In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

180 V 800 mA 50 A 140 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 500A 140V
Datasheet
18In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

150 mA SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 160V 500A DO214 2L SIDACtor Uni
Datasheet
1,503In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

200 V 800 mA 50 A 160 V 5 uA 120 mA 4 V 40 pF to 130 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 170V
Datasheet
84In Stock
2,500Expected 8/13/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

220 V 800 mA 50 A 170 V 5 uA 150 mA 4 V 30 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 170V
Datasheet
1,767In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

150 mA SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD Bi 140V 5000A
Datasheet
108In Stock
Min.: 1
Mult.: 1

220 V 800 mA 400 A 155 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 190V 100A DO214 2L
Datasheet
380In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

240 V 800 mA 25 A 180 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 190V
Datasheet
1,998In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

260 V 800 mA 30 A 190 V 5 uA 150 mA 4 V 30 pF to 80 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 220V
Datasheet
976In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

300 V 800 mA 30 A 220 V 5 uA 150 mA 4 V 30 pF to 80 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel