The function of primary switch is to provide the high voltage, high frequency necessary to reduce the output of an AC-DC power supply. This is necessary to achieve high efficiency and reduce the size of the power supply. The various circuit topologies demand 2 basic characteristics of the HEXFET® power MOSFETs used in this application: low gate charge and low R_DS(on). Dependent upon the power level, IGBTs as well as Power MOSFETs are used - fast switching WARP Speed™ IGBTs offer lowest losses for higher power applications.

International Rectifier has several product families that address AC-DC primary switched, dependent on the power level, performance and topology of the power supply.

	Standard Series
	High Performance Series
	Fast Body Diode Series for ZVS Applications
	Warp Speed IGBTs for Bridge Circuits
	WARP2 IGBTs for High Power PFC and Primary Switch

Standard Series: Industry Standard Performance with Best Cost/Performance Ratio

Part Number	Package	BVDSS	RDS(on)	ID	Application
IRF730A/S	TO-220/D2Pak	400V	1.0 ohm	5.5A	Various
IRF740A/S	TO-220/D2Pak	400V	0.55 ohm	10A	Various
IRF820A/S	TO-220/D2Pak	500V	3.0 ohm	2.5A	Various
IRFB11N50A	TO-220	500V	0.52 ohm	11A	PFC+Dual Forward
IRFS11N50A	D2Pak	500V	0.52 ohm	11A	Various
IRFIB7N50A	TO-220 Full-Pak	500V	0.52 ohm	6.6A	Various
IRF830A/S	TO-220/D2Pak	500V	0.42 ohm	12A	Various
IRF840A/S	TO-220/D2Pak	500V	0.85 ohm	8A	Various
IRFP450A	TO-247	500V	0.40 ohm	14A	Flyback
IRFP460A	TO-247	500V	0.27 ohm	20A	Flyback
IRFP22N50A	TO-247	500V	0.23 ohm	22A	Flyback
IRFBC40A/S	TO-220/D2Pak	600V	1.2 ohm	6.2A	Various
IRFPC50A	TO-247	600V	0.60 ohm	11A	Various
IRFR1N60A	D-Pak	600V	7.0 ohm	1.0A	Various
IRFB9N60A	TO-220	600V	0.75 ohm	9.2A	Flyback
IRFIB6N60A	TO-220 Full-Pak	600V	0.75 ohm	5.5A	Flyback
IRFSL9N60A	TO-262	600V	0.75 ohm	9.2A	Flyback
IRFS9N60A	D2Pak	600V	0.75 ohm	9.2A	Flyback
IRFB9N65A	TO-220	650V	0.93 ohm	8.5A	Single Forward/Flyback
IRFIB5N65A	TO-220 Full-Pak	650V	0.93 ohm	5.1A	Single Forward/Flyback
FA57SA50LC	SOT-227	500V	0.80 ohm	57A	Power MOSFET module - high performance
FA38SA50LC	SOT-227	500V	0.130 ohm	38A	Power MOSFET module - standard
IRFPS37N50A	Super-247™	500V	0.130 ohm	36A	Power MOSFET module - high performance
IRFBA22N50A	Super-220™	500V	0.230 ohm	22A	Hard switching - high performance
IRFB13N50A	TO-220	500V	0.450 ohm	22A	Hard switching - standard
IRFR430A	D-PAk	500V	1.700 ohm	4.5A	Hard switching - standard
IRFU430A	I-PAk	500V	1.700 ohm	4.5A	Hard switching - standard
IRFR420A	D-Pak	500V	3.000 ohm	2.5A	Hard switching - standard
IRFU420A	I-Pak	500V	3.000 ohm	2.5A	Hard switching - standard
IRFBC40A	TO-220	600V	1.200 ohm	6.2A	Hard switching - standard
IRFBC30A/S	D2Pak/TO-220	600V	2.200 ohm	3.6A	Hard switching - standard
IRFRC20	D-Pak	600V	4.400 ohm	2A	Hard switching - standard
IRFPE50	TO-247AC	800V	1.2 ohm	7.8A	Hard switching - standard
IRFPE40	TO-247AC	800V	2 ohm	5.4A	Hard switching - standard
IRFBE30	TO-220AB	800V	3 ohm	4.1A	Hard switching - standard
IRFIBE30G	TO-220FP iso	800V	3 ohm	2.1A	Hard switching - standard
IRFPE30	TO-247AC	800V	3 ohm	4.1A	Hard switching - standard
IRFBE20	TO-220AB	800V	6.5 ohm	1.8A	Hard switching - standard
IRFIBE20G	TO-220FP iso	800V	6.5 ohm	1.4A	Hard switching - standard
IRFPF50	TO-247AC	900V	1.6 ohm	6.7A	Hard switching - standard
IRFPF40	TO-247AC	900V	2.5 ohm	4.7A	Hard switching - standard
IRFIBF30G	TO-220FP iso	900V	3.7 ohm	1.9A	Hard switching - standard
IRFPF30	TO-247AC	900V	3.7 ohm	3.6A	Hard switching - standard
IRFBF20S	D2Pak	900V	8 ohm	1.7A	Hard switching - standard
IRFIBF20G	TO-220AB	900V	8 ohm	1.2A	Hard switching - standard
IRFPG50	TO-247AC	1000V	2 ohm	6.1A	Hard switching - standard
IRFPG40	TO-247AC	1000V	3.5 ohm	4.3A	Hard switching - standard
IRFBG30	TO-220AB	1000V	5 ohm	3.1A	Hard switching - standard
IRFPG30	TO-247AC	1000V	5 ohm	3.1A	Hard switching - standard
IRFBG20	TO-247AC	1000V	11 ohm	1.4A	Hard switching - standard

High Performance Series: Up to 55% Improvement in R_DS(on) over Industry Standard

Part Number	Package	BVDSS	RDS(on)	ID	Application
IRFPS43N50K	Super-247™	500V	0.90 ohm	47A	PFC Hard switching
IRFP32N50K	TO-247	500V	0.160 ohm	32A	PFC Hard switching
IRFB20N50K	TO-220	500V	0.250 ohm	20A	PFC Hard switching
IRFB18N50K	TO-220	500V	0.290 ohm	17A	PFC Hard switching
IRFPS40N60K	Super-247™	600V	0.130 ohm	40A	PFC Hard switching
IRFP27N60K	TO-247	600V	0.220 ohm	27A	PFC Hard switching
IRFP22N60K	TO-247	600V	0.280 ohm	22A	PFC Hard switching

Fast Body Diode Series for ZVS Applications

Part Number	Package	BVDSS	RDS(on)	ID	Application
IRFPS40N50L	Super-247™	500V	0.100 ohm	46A	ZVS switching - benchmark
IRFPS35N50L	Super-247™	500V	0.145 ohm	34A	ZVS switching - benchmark
IRFP31N50L	TO-247	500V	0.180 ohm	31A	ZVS - benchmark
IRFP23N50L	TO-247	500V	0.235 ohm	23A	ZVS - benchmark
IRFB17N50L	TO-220	500V	0.320 ohm	16A	ZVS - benchmark
IRFP17N50L	TO-247	500V	0.320 ohm	16A	ZVS - benchmark
IRFIB5N50L	TO-220 Full-Pak	500V	0.800 ohm	5A	ZVS - benchmark
IRFPS38N60L	Super-247™	600V	0.150 ohm	38A	ZVS Switching - benchmark
IRFPS29N60L	Super-247™	600V	0.210 ohm	29A	ZVS Switching - benchmark
IRFP26N60L	TO-247	600V	0.250 ohm	26A	ZVS Switching - benchmark
IRFP21N60L	TO-247	600V	0.320 ohm	21A	ZVS Switching - benchmark
IRFP15N60L	TO-247	600V	0.460 ohm	15A	ZVS Switching - benchmark
IRFB16N60L	TO-220	600V	0.460 ohm	16A	ZVS Switching - benchmark

Warp Speed IGBTs for Bridge Circuits

Part Number	Package	BVCES	VCE(on)	IC@ 25°C
IRG4IBC20W	TO-220 Full-Pak	600V	2.6V	11.8A
IRG4BC20W	TO-220AB	600V	2.6V	13A
IRG4IBC30W	TO-220 Full-Pak	600V	2.7V	17A
IRG4BC30W	TO-220AB	600V	2.7V	23A
IRG4BC30W-S	D2Pak	600V	2.1V	23A
IRG4PC30W	TO-247	600V	2.7V	23A
IRG4BC40W	TO-220	600V	2.5V	40A
IRG4PC40W	TO-247	600V	2.5V	40A
IRG4PC50W	TO-247	600V	2.3V	55A
IRG4PF50W	TO-247	900V	2.7V	51A

WARP2 IGBTs for High Power PFC and Primary Switch

Part Number	Package	BVDSS	RDS(on)	IC	ID	Application
IRGP50B60PD1	TO-220/TO-247	600V	0.61 ohm	50A	15A	PFC Hardswitch benchmark
IRGP35B60PD	TO-220/TO-247	600V	0.84 ohm	35A	15A	PFC Hardswitch benchmark
IRGP20B60PD	TO-220/TO-247	600V	0.158 ohm	20A	8A	PFC Hardswitch benchmark
IRGP20B60PD	TO-247	600V	0.158 ohm	20A	4A	PFC Hardswitch benchmark

* MOSFET equivalent current
** Co-Pak diode current