GTOs are optimized for low conduction losses. The typical on-off switching frequency is in the range of 200 - 500 hertz for most applications. GTOs are, by nature, relatively slow switches.
Typical transition times from on to off state and vice versa are in a range of 10 - 30 microseconds. All GTOs require protective networks called "snubbers" for turn-on and turn-off. The turn-on snubber circuit, in essence an inductor, limits the rate of current rise. For turn-off, the GTO requires a device that limits the rate of voltage rise, in essence a capacitor.
All ABB GTOs are press-pack devices. They are pressed with a relatively high force onto heat-sinks which also serve as electrical contacts to the power terminals.

Asymmetric GTOs are divided in two categories: Buffer layer and Standard. Buffer layer GTOs have exceptionally low on-state and dynamic losses. Fine pattern types (5SGF) are optimised for fast switching and transparent emitter (5SGT) for low on-state losses. The Standard GTOs have excellent trade-off between on-state and switching losses.

Part Number	VDRM (V)	VDC (V)	ITGQM  @  Cs(A)	ITGQM  @  Cs(µF)	Package* (mm)
Standard
5SGA 15F2502	2500	1400	1500	3	75/47
5SGA 20H2501	2500	1400	2000	4	93/63
5SGA 25H2501	2500	1400	2500	6	93/63
5SGA 30J2501	2500	1400	3000	5	108/75
5SGA 06D4502	4500	2800	600	1	58/34
5SGA 20H4502	4500	2200	2000	4	93/63
5SGA 30J4502	4500	2800	3000	6	108/75
5SGA 40L4501	4500	2800	4000	6	120/85

*Note: Pole-piece diameter / Housing height
 

Part Number	VDRM (V)	VDC (V)	ITGQM @ Cs (A)	ITGQM @ Cs(µF)	Package* (mm)
Buffer layer
5SGF 30J4502	4500	3000	3000	3	108/75
5SGF 40L4502	4500	2800	4000	6	120/85

*Note: Pole-piece diameter / Housing height