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 500A 6V
Datasheet
7.624In 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
2.436In 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
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
2.534In 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
4.636In Stock
5.000Expected 12/7/2026
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 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 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 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 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 275V 3000A DO214AB RoHS
Datasheet
2.068In Stock
3.000Expected 12/7/2026
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 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 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
3.984In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 4.000

50 mA SMD/SMT QFN-2 Reel, Cut Tape, MouseReel
Littelfuse Thyristor Surge Protection Devices - TSPD SEP Ethernet 100A Biasd Protec. Device
Datasheet
6.018In 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 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
2.932In Stock
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
2.201In Stock
5.000Expected 8/27/2026
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 50A 58V
Datasheet
2.557In Stock
2.500Expected 9/1/2026
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