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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Description Datasheet Availability Pricing (GBP) Filter the results in the table by unit price based on your quantity.
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 500A 75V
Datasheet
597In Stock
2,500Expected 20/08/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

98 V 800 mA 50 A 75 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 HIGH SURGE 170V 1000A
Datasheet
1,770In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

220 V 800 mA 50 A 170 V 5 uA 50 mA 4 V 50 pF to 90 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 100A 320V
Datasheet
43In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

400 V 800 mA 25 A 320 V 5 uA 150 mA 4 V 20 pF to 40 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SEP ETHERNET 100A BIASED PROTECTN DEV
Datasheet
1,474In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4,000

150 mA SMD/SMT QFN-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 65V 3000A DO214AB RoHS
Datasheet
2,635In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

65 V 4 V 150 pF - 65 C + 150 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 100A 180V
Datasheet
1,893In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

220 V 800 mA 30 A 180 V 5 uA 120 mA 4 V 25 pF to 95 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel

Littelfuse Thyristor Surge Protection Devices - TSPD 12V 30A
Datasheet
1,910In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

12 V 300 pA 40 mA 2.5 pF - 55 C + 150 C SMD/SMT SOT-23-6 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 58V 3000A DO214AB RoHS
Datasheet
3,556In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

58 V 4 V 150 pF - 65 C + 150 C SMD/SMT DO-214AB-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD HIGH SURGE 65V 1000A
Datasheet
1,853In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

88 V 800 mA 50 A 65 V 5 uA 50 mA 4 V 100 pF to 150 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 50A 320V
Datasheet
2,876In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

400 V 800 mA 20 A 320 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 58/116V 50A TO220A SIDACtor SYM 2Chp
Datasheet
520In Stock
Min.: 1
Mult.: 1

77 V, 154 V 800 mA 20 A 58 V, 116 V 5 uA 150 mA 4 V 20 pF to 35 pF, 40 pF to 60 pF - 40 C + 85 C Through Hole TO-220-2 Bulk
Littelfuse Thyristor Surge Protection Devices - TSPD 50A 140V
Datasheet
1,848In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

180 V 800 mA 20 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 3Chp 130V 100A
Datasheet
500In Stock
Min.: 1
Mult.: 1

180 V 800 mA 30 A 130 V 5 uA 150 mA 8 V 15 pF to 60 pF, 25 pF to 95 pF - 40 C + 85 C Through Hole TO-220-2 Bulk
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 190V
Datasheet
2,400In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

260 V 800 mA 20 A 190 V 5 uA 150 mA 4 V 25 pF to 35 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD HIGH SURGE 320V 1000A
Datasheet
1,923In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

400 V 800 mA 50 A 320 V 5 uA 50 mA 4 V 45 pF to 65 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 2Chp 275/550V 500A
Datasheet
509In Stock
Min.: 1
Mult.: 1

350 V, 700 V 800 mA 50 A 275 V, 550 V 5 uA 150 mA 4 V 15 pF to 45 pF, 30 pF to 80 pF - 40 C + 85 C Through Hole TO-220-2 Bulk
Littelfuse Thyristor Surge Protection Devices - TSPD TSPD DO214 170V 3KA SIDACTR
Datasheet
2,995In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

800 mA 170 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 6V 50A QFN 3X3 2L SIDACtor Bi
Datasheet
19,120In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 5,000

50 mA SMD/SMT QFN-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SIDACtor Bi 6V 100A SOD123FL RoHS
Datasheet
5,183In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 3,000

20 A 6 V 5 uA 50 mA 4 V 15 pF Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 50A 6V
Datasheet
14,992In Stock
15,000Expected 25/11/2026
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

25 V 800 mA 20 A 6 V 5 uA 50 mA 4 V 100 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD DO-214AA SIDACtor devices
Datasheet
5,345In 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 6V
Datasheet
4,035In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

25 V 800 mA 30 A 6 V 5 uA 50 mA 4 V 100 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 6V
Datasheet
11,932In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

25 V 800 mA 50 A 6 V 5 uA 50 mA 4 V 100 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD 500A 6V
Datasheet
8,424In 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 HIGH SURGE 6V 1000A
Datasheet
2,566In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 2,500

25 V 800 mA 50 A 6 V 5 uA 50 mA 4 V 50 pF to 150 pF - 40 C + 85 C SMD/SMT DO-214AA Reel, Cut Tape, MouseReel