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 (PLN) 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 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 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
4 636In 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 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
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 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
4 026In 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 020In 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 251In 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 11/16/2026
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
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