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Squared

Squared gas discharge tubes (GDTs) mount on printed circuit boards to provide overvoltage protection to board components, circuits, and electrical equipment. The surge protective devices respond within picoseconds, using plasma to discharge excess voltage as heat. You will find the SPDs providing lightning protection to overhead power lines and protecting data cables from smaller overvoltage events. Discover the best surge suppressor for you application by consulting the Littelfuse Circuit Protection Product Selection Guide.

Surge capacities of between 1 kA 8/20 µs to 5 kA 8/20 µs
Wide ranges of operating voltages (e.g., 75 V dc to 600 V dc)
Very low to low capacitance (e.g., ≥ 0.5 pF, ≥ 1 pF)
Include crowbar devices with low arc voltages
Small footprints (e.g., 3.2x1.6x1.6 mm)
UL Recognized
Meet IEC and ITU standards
Certified lead-free and RoHS compliant

Capacitance does not vary with voltage, meaning responses to fast transient overvoltage events will not introduce noise across data or voice circuits
Available with optional fail-short mechanisms to remove blown GDTs from circuits
Available with a variety of mounting leads
Compatible with high-volume and automated PCB production processes

Squared Parts

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	Part Number	Actions	DC Sparkover Voltage Tolerance (%)	V_MIN Spark (V)	V_Nom Spark (V)	V_MAX Spark (V)	Max Impulse Breakdown Voltage @ 1kV/µs (V)	Max Impulse Sparkover Voltage @ 100V/µs (V)	Capacitance (C_o) (pF)	Impulse Discharge Current @8/20µs (kA)	Insulation Resistance (Ω)	Electrodes	Failsafe	Agency Approvals

Part Number	Actions	DC Sparkover Voltage Tolerance (%)	V_MIN Spark (V)	V_Nom Spark (V)	V_MAX Spark (V)	Max Impulse Breakdown Voltage @ 1kV/µs (V)	Max Impulse Sparkover Voltage @ 100V/µs (V)	Capacitance (C_o) (pF)	Impulse Discharge Current @8/20µs (kA)	Insulation Resistance (Ω)	Electrodes	Failsafe	Agency Approvals
Series: GTCC23 - Squared GDT, 2 terminal, Surface Mount Series: GTCC23 Squared GDT, 2 terminal, Surface Mount	Datasheet Request Sample View More	±20%		150		<=600		<.5	1		2	Without	UR
Series: GTCC23 - Squared GDT, 2 terminal, Surface Mount Series: GTCC23 Squared GDT, 2 terminal, Surface Mount	Datasheet Request Sample View More	±20%		200		<=700		<.5	1		2	Without	UR
Series: GTCC23 - Squared GDT, 2 terminal, Surface Mount Series: GTCC23 Squared GDT, 2 terminal, Surface Mount	Datasheet Request Sample View More	±20%		230		<=700		<.5	1		2	Without	UR
Series: GTCC23 - Squared GDT, 2 terminal, Surface Mount Series: GTCC23 Squared GDT, 2 terminal, Surface Mount	Datasheet Request Sample View More	±20%		75		<=600		<.5	1		2	Without	UR
Series: GTCC23 - Squared GDT, 2 terminal, Surface Mount Series: GTCC23 Squared GDT, 2 terminal, Surface Mount	Datasheet Request Sample View More	±20%		90		<=600		<.5	1		2	Without	UR
Series: SE - Square GDT with 1206 Size Series: SE Square GDT with 1206 Size	Datasheet Request Sample View More		140	182	98	900	800	<0.5	0.5	1	2	No
Series: SE - Square GDT with 1206 Size Series: SE Square GDT with 1206 Size	Datasheet Request Sample View More		200	260	140	1100	700	<0.3	0.5	1	2	No
Series: SE - Square GDT with 1206 Size Series: SE Square GDT with 1206 Size	Datasheet Request Sample View More		230	276	172	800	600	<0.5	0.5	1	2	No
Series: SE - Square GDT with 1206 Size Series: SE Square GDT with 1206 Size	Datasheet Request Sample View More		350	495	265	1150	900	<0.5	0.5	1	2	No
Series: SG - Littelfuse SG Series GDT Series: SG Littelfuse SG Series GDT	Request Sample View More		105	150	195	600	500	1	1	1	2	No
Series: SG - Littelfuse SG Series GDT Series: SG Littelfuse SG Series GDT	Request Sample View More		172	230	288	800	650	1	1	1	2	No
Series: SG - Littelfuse SG Series GDT Series: SG Littelfuse SG Series GDT	Request Sample View More		225	300	375	850	700	1	1	1	2	No