Power & Signal Relays

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Part	Manufacturer	Relay Type	Mounting Feature	Relay Action	Relay Function	Coil or Input Supply Type	Reference Standard	Maximum Contact AC Rating (R Load)	Dielectric Strength Between Open Contacts	Relay Form	Operate Time	Electrical Life	Maximum Contact DC Power Rating (R Load)	Release Time	Insulation Resistance	Coil Power (mW)	Packing Method	Body Length/Diameter	Body Width	Coil Resistance	Sealing	Weight	Maximum AC Coil Current	No. of Terminals	Physical Dimension	End Contact Plating	Body Height	Dielectric Strength Between Coil & Contacts	Maximum Contact DC Rating (R Load)	Maximum Operating Temperature	Maximum AC Contact Current	Maximum DC Coil Current	Maximum AC Coil Voltage	Maximum Contact AC Rating (I Load)	Minimum Operating Temperature	DC Coil Release Voltage	Terminal Finish	Maximum DC Contact Current	Termination Type	Nominal Coil Voltage	DC Coil Operate Voltage	Manufacturer Series	Contact Resistance	Input Switching Control Type	End Contact Material	PCB Hole Count	Maximum DC Contact Voltage	Additional Features	Maximum AC Contact Voltage	JESD-609 Code	Terminal Length	Maximum DC Coil Voltage	Maximum Contact AC Power Rating (R Load)	Contact or Output Supply Type
FTR-F1CA012V	Fujitsu	POWER/SIGNAL RELAY	THROUGH HOLE-STRAIGHT MOUNT	MOMENTARY	DPDT	DC	CQC; CSA; DEMKO; FIMKO; IMQ; NEMKO; SEMKO; SEV; UL; VDE	5A@250VAC			15 ms	100000 Cycle(s)		5 ms		530		29 mm	12.8 inch	270 ohm					29mm x 12.8mm x 16.5mm		16.5 mm		5A@24VDC	75 Cel	5 A	.044 A			-40 Cel	1.2 V		5 A	SOLDER		8.4 V						24 V		250 V			12 V		AC/DC
G2R-1A-EDC5	Omron	POWER/SIGNAL RELAY	THROUGH HOLE-STRAIGHT MOUNT	MOMENTARY	SPST	DC	CSA; SEMKO; TUV; UL; VDE	16A@250VAC	1000 Vrms	1 FORM A	15 ms	100000 Cycle(s)		5 ms	1000000000 ohm	530	TRAY	29 mm	13 inch	47 ohm		17 g		6	29mm x 13mm x 25.5mm		25.5 mm	5000 Vrms	16A@30VDC	70 Cel	16 A	.106 A			-40 Cel	.75 V		16 A	SOLDER	5 V	3.5 V		50 mohm	Random	Silver Alloy		30 V		250 V		.1575 inch	5 V		AC/DC
G2RL-2A4-CFDC24	Omron	POWER/SIGNAL RELAY	THROUGH HOLE-STRAIGHT MOUNT	MOMENTARY	DPST	DC	CSA; UL; VDE	8A@440VAC			7 ms			2 ms		400	TUBE	29 mm	12.7 inch	1440 ohm		12 g			29mm x 12.7mm x 15.7mm		15.7 mm		8A@300VDC	85 Cel	8 A	.017 A			-40 Cel	2.4 V		8 A	SOLDER		16.8 V						300 V	LOW PROFILE	440 V			24 V		AC/DC
G5CA-1ADC5	Omron	POWER/SIGNAL RELAY	THROUGH HOLE-STRAIGHT MOUNT	MOMENTARY	SPST	DC	CQC; CSA; TUV; UL	15A@250VAC		1 FORM A	10 ms	100000 Cycle(s)		10 ms	1000000000 ohm	200	TUBE	22 mm	16 inch	125 ohm	RT2; RT3			4	22mm x 16mm x 11mm		11 mm		10A@125VDC	70 Cel		.04 A			-25 Cel	.5 V		10 A	SOLDER	5 V	3.75 V		30 mohm		Silver Alloy		125 V		250 V		.1378 inch	7.5 V		AC/DC
G5LE-1A-CF-DC5	Omron	POWER/SIGNAL RELAY	THROUGH HOLE-STRAIGHT MOUNT	MOMENTARY	SPST	DC	CSA; UL; VDE	10A@250VAC			10.6 ms	36000 Cycle(s)		12.2 ms		400	TRAY	22.5 mm	16.5 inch	63 ohm					22.5mm x 16.5mm x 19mm		19 mm		8A@30VDC	85 Cel	10 A	.079 A			-25 Cel	.5 V		8 A	SOLDER		3.75 V						30 V		250 V			5 V		AC/DC
G5NB-1A4-EL-HA-PW-SPDC12	Omron
G5NB-1A4-EL-HA-PWDC12	Omron
G5NB-1A4-EL-HA-SPDC12	Omron
G5NB-1A4DC5	Omron	POWER/SIGNAL RELAY	THROUGH HOLE-STRAIGHT MOUNT	MOMENTARY	SPST	DC	CSA; UL; VDE	3A@250VAC			10 ms	200000 Cycle(s)		10 ms		200		20.5 mm	7.2 inch	125 ohm					20.5mm x 7.2mm x 15.3mm		15.3 mm		3A@30VDC	70 Cel	3 A	.04 A			-40 Cel	.5 V		3 A	SOLDER		3.75 V						30 V		250 V			5 V		AC/DC
G5NB-1ADC5	Omron	POWER/SIGNAL RELAY	THROUGH HOLE-STRAIGHT MOUNT	MOMENTARY	SPST	DC	CSA; UL; VDE	3A@250VAC			10 ms	200000 Cycle(s)		10 ms		200		20.5 mm	7.2 inch	125 ohm					20.5mm x 7.2mm x 15.3mm		15.3 mm		3A@30VDC	70 Cel	3 A	.04 A			-40 Cel	.5 V		3 A	SOLDER		3.75 V						30 V		250 V			5 V		AC/DC
G5Q-1A-HADC5	Omron	POWER/SIGNAL RELAY
G6D-1A-ASI5VDC	Omron	POWER/SIGNAL RELAY	THROUGH HOLE-STRAIGHT MOUNT	MOMENTARY	SPST	DC	CSA; TUV; UL	5A@250VAC	750 Vrms	1 FORM A	10 ms	70000 Cycle(s)		5 ms	1000000000 ohm	200		17.5 mm	6.5 inch	125 ohm	WATER PROOF	3 g		4	17.5mm x 6.5mm x 12.5mm		12.5 mm	3000 Vrms	5A@30VDC	70 Cel	5 A	.04 A			-25 Cel	.5 V		5 A	SOLDER	5 V	3.5 V		100 mohm	Random	Silver Alloy	4	30 V	SOCKET MOUNTABLE	250 V		.1378 inch	5 V		AC/DC
G7L-2A-PDC12	Omron	POWER/SIGNAL RELAY
G8ND-27UR	Omron	POWER/SIGNAL RELAY																																								G8ND
HE2AN-DC24V	Panasonic	POWER/SIGNAL RELAY	PANEL MOUNT	MOMENTARY	DPST	DC	CSA; TUV; UL; VDE	25A@277VAC			30 ms	100000 Cycle(s)		10 ms		1920	BOX	50 mm	33 inch	300 ohm					50mm x 33mm x 35.8mm		35.8 mm		25A@30VDC	55 Cel	25 A	.08 A			-50 Cel	2.4 V		25 A	QUICK CONNECT		16.8 V						30 V		277 V			24 V		AC/DC
HF33F/024-ZS3	Xiamen Hongfa Electroacoustic	POWER/SIGNAL RELAY																																			GOLD													e4
HF41F/24-ZST	Xiamen Hongfa Electroacoustic	POWER/SIGNAL RELAY	THROUGH HOLE-STRAIGHT MOUNT	MOMENTARY	SPDT	DC	CQC; CUL; UL; VDE	6A@250VAC	1000 Vrms	1 FORM C	8 ms	30000 Cycle(s)	180W@125VDC	4 ms	1000000000 ohm	170		28 mm	5 inch	3390 ohm	PLASTIC SEALED	5 g		5	28mm x 5mm x 15mm		15 mm	4000 Vrms	6A@30VDC	85 Cel	6 A	.007 A			-40 Cel	1.2 V		6 A	SOLDER	24 V	18 V		100 mohm	Random	Silver Tin Oxide	5	125 V		400 V		.1575 inch	36 V	1500VA@400VAC	AC/DC
HFD2/012-M-L2	Xiamen Hongfa Electroacoustic	POWER/SIGNAL RELAY	THROUGH HOLE-STRAIGHT MOUNT	LATCHED	DPDT	DC	CUL; UL	3A@250VAC			4.5 ms	50000 Cycle(s)		4.5 ms		200		20.2 mm	10.2 inch	720 ohm	EPOXY TERMINAL SEALED				20.2mm x 10.2mm x 10.6mm		10.6 mm		3A@220VDC	85 Cel	3 A	.017 A			-40 Cel	9 V		3 A	SOLDER		9 V						220 V		250 V			12 V		AC/DC
HFD2/012-M-L2-D	Xiamen Hongfa Electroacoustic	POWER/SIGNAL RELAY	THROUGH HOLE-STRAIGHT MOUNT	LATCHED	DPDT	DC	CUL; UL	3A@250VAC			4.5 ms	50000 Cycle(s)		4.5 ms		200		20.2 mm	10.2 inch	720 ohm	EPOXY TERMINAL SEALED				20.2mm x 10.2mm x 10.6mm		10.6 mm		3A@220VDC	85 Cel	3 A	.017 A			-40 Cel	9 V		3 A	SOLDER		9 V						220 V		250 V			12 V		AC/DC
HFW5A1230K00	TE Connectivity	POWER/SIGNAL RELAY	PANEL MOUNT	MOMENTARY	DPDT-CO	DC				2 FORM C						1003				700 ohm	HERMETICALLY SEALED									125 Cel	5 A	.038 A			-65 Cel			5 A	SOLDER													26.5 V		AC/DC
KUEP-11D15-125	TE Connectivity	POWER/SIGNAL RELAY	PANEL MOUNT			DC			1200 Vrms	2 FORM C					100000000 ohm	1800	TRAY	38.9 mm	35.7 inch	8680 ohm		85 g					48.4 mm	1200 Vrms		70 Cel	10 A				50 Cel			10 A	SOLDER/QUICK CONNECT						SILVER CADMIUM OXIDE		150 V					12 V
KUEP-3D15-125	TE Connectivity	POWER/SIGNAL RELAY	PANEL MOUNT			DC			1200 Vrms	1 FORM X					100000000 ohm	1200		38.9 mm	35.7 inch	13000 ohm		85 g					48.4 mm	2200 Vrms		70 Cel	10 A				50 Cel			10 A	SOLDER/QUICK CONNECT						SILVER CADMIUM OXIDE		150 V					125 V
KUEP-3D15-48	TE Connectivity	POWER/SIGNAL RELAY	PANEL MOUNT	MOMENTARY	SPST	DC	CSA; UL		1200 Vrms	1 FORM X	15 ms	100000 Cycle(s)		10 ms	100000000 ohm	1300		38.9 mm	35.7 inch	1800 ohm	DUST PROOF	85 g		9	38.9mm x 35.7mm x 48.4mm		48.4 mm	2200 Vrms	10A@150VDC	70 Cel	10 A	.025 A			50 Cel			10 A	SOLDER/QUICK CONNECT	150 V	36 V			Random	SILVER CADMIUM OXIDE		150 V				.1575 inch	48 V		AC/DC
LY3FDC24	Omron	POWER/SIGNAL RELAY	PANEL MOUNT	MOMENTARY	3PDT	DC	CE; CSA; TUV; UL	10A@110VAC			25 ms	200000 Cycle(s)		25 ms		1400		43.94 mm	32 inch	410 ohm					43.94mm x 32mm x 35.56mm		35.56 mm		10A@24VDC	55 Cel	10 A	.059 A			-25 Cel	2.4 V		10 A	SOLDER		19.2 V						24 V		110 V			24 V		AC/DC
MK2P-IDC48	Omron	POWER/SIGNAL RELAY	SOCKET MOUNT	MOMENTARY	DPDT	DC	CSA; DEMKO; NEMKO; SEMKO; SEV; TUV; UL	10A@250VAC			30 ms			20 ms		1500		34.5 mm	34.5 inch	1630 ohm	DUST PROOF				34.5mm x 34.5mm x 52.5mm		52.5 mm		10A@28VDC	40 Cel	10 A	.03 A			-10 Cel	7.2 V		10 A	SNAP-ON		38.4 V						28 V		250 V			48 V		AC/DC
MY2IN-AC110/120(S)	Omron	POWER/SIGNAL RELAY	SOCKET MOUNT	MOMENTARY	DPDT	AC	CE; CSA; IMQ; LR; SEV; UL; VDE	10A@250VAC			20 ms	500000 Cycle(s)		20 ms		1100		28 mm	21.5 inch	4430 ohm			.009 A		28mm x 21.5mm x 36mm		36 mm		10A@30VDC	70 Cel	10 A		120 V		-55 Cel			10 A	SNAP-ON			MY					30 V	COIL OPERATE VOLTAGE(AC): 96 V, COIL RELEASE VOLTAGE(AC): 36 V, WITH LED INDICATOR AND LOCKABLE TEST BUTTON	250 V					AC/DC
MY2N-AC110/120(S)	Omron	POWER/SIGNAL RELAY	SOCKET MOUNT	MOMENTARY	DPDT	AC	CE; CSA; IMQ; LR; SEV; UL; VDE	10A@250VAC			20 ms	500000 Cycle(s)		20 ms		1100		28 mm	21.5 inch	4430 ohm			.009 A		28mm x 21.5mm x 36mm		36 mm		10A@30VDC	70 Cel	10 A		120 V		-55 Cel			10 A	SNAP-ON			MY					30 V	COIL OPERATE VOLTAGE(AC): 96 V, COIL RELEASE VOLTAGE(AC): 36 V, WITH LED INDICATOR	250 V					AC/DC
MY2N-CR-AC110/120(S)	Omron	POWER/SIGNAL RELAY	SOCKET MOUNT	MOMENTARY	DPDT	AC	CE; CSA; IMQ; LR; SEV; UL; VDE	10A@250VAC			20 ms	500000 Cycle(s)		20 ms		1100		28 mm	21.5 inch	4430 ohm			.009 A		28mm x 21.5mm x 36mm		36 mm		10A@30VDC	70 Cel	10 A		120 V		-55 Cel			10 A	SNAP-ON			MY					30 V	COIL OPERATE VOLTAGE(AC): 96 V, COIL RELEASE VOLTAGE(AC): 36 V, WITH LED INDICATOR	250 V					AC/DC
MY2NDC24	Omron	POWER/SIGNAL RELAY	PANEL MOUNT	LATCHED	DPDT	DC	CE; CSA; UL; VDE	5A@220VAC			20 ms	500000 Cycle(s)		20 ms		900		28 mm	21.5 inch	662 ohm	MOISTURE PROOF				28mm x 21.5mm x 36mm		36 mm		5A@24VDC	70 Cel	5 A	.036 A			-55 Cel	2.4 V		5 A	SOLDER		19.2 V						24 V	BUILT-IN INDICATOR	220 V			24 V		AC/DC
MY4N-CR-AC110/120(S)	Omron	POWER/SIGNAL RELAY	SOCKET MOUNT	MOMENTARY	4PDT	AC	CE; CSA; IMQ; LR; SEV; UL; VDE	5A@250VAC			20 ms	200000 Cycle(s)		20 ms		1100		28 mm	21.5 inch	4430 ohm			.009 A		28mm x 21.5mm x 36mm		36 mm		5A@30VDC	70 Cel	5 A		120 V		-55 Cel			5 A	SNAP-ON			MY					30 V	COIL OPERATE VOLTAGE(AC): 96 V, COIL RELEASE VOLTAGE(AC): 36 V, WITH LED INDICATOR	250 V					AC/DC
NA-48W-K	Fujitsu	POWER/SIGNAL RELAY	THROUGH HOLE-STRAIGHT MOUNT	MOMENTARY	DPDT	DC	CSA; UL	2A@250VAC			6 ms	200000 Cycle(s)		4 ms		300		14.9 mm	7.4 inch	7680 ohm					14.9mm x 7.4mm x 9.7mm		9.7 mm		2A@220VDC	85 Cel	2 A	.006 A			-40 Cel	4.8 V		2 A	SOLDER		36 V						220 V		250 V			48 V		AC/DC
PRD-7AG0-240	TE Connectivity	POWER/SIGNAL RELAY	PANEL MOUNT	MOMENTARY	DPST	AC	CSA; UL									9800		85.7 mm	63.8 inch	1200 ohm			.041 A		85.7mm x 63.8mm x 63.5mm		63.5 mm				30 A		240 V					30 A	SCREW															AC/DC
PRD-7AY0-240	TE Connectivity	POWER/SIGNAL RELAY	PANEL MOUNT	MOMENTARY	DPST	AC	CSA; UL									9800		85.7 mm	63.8 inch	1200 ohm			.041 A		85.7mm x 63.8mm x 63.5mm		63.5 mm				25 A		240 V					25 A	SOLDER/QUICK CONNECT										600 V					AC/DC
RH1B-UDC12V	Idec	POWER/SIGNAL RELAY																																								RH
RJ2S-CL-D24	Idec	POWER/SIGNAL RELAY	THROUGH HOLE-STRAIGHT MOUNT	MOMENTARY	DPDT	DC	CE; CSA; UL; VDE	8A@250VAC	1000 Vrms		15 ms	100000 Cycle(s)		10 ms		530		28.8 mm	12.7 inch	1080 ohm		19 g			28.8mm x 12.7mm x 27mm		27 mm	5000 Vrms		70 Cel	8 A			4A@250VAC	-40 Cel			8 A	SOLDER	24 V			50 mohm	Random	AgNi		30 V		250 V		.2362 inch	40.8 V		AC/DC
RTB34012F	TE Connectivity	POWER/SIGNAL RELAY	PANEL MOUNT	MOMENTARY	SPST	DC	UL; VDE	12A@250VAC	1000 Vrms	1 FORM A	15 ms	30000 Cycle(s)		6 ms		400	BOX; TUBE	29 mm	12.7 inch	360 ohm	IMMERSION CLEANABLE CASE	14 g		5	29mm x 12.7mm x 15.7mm		15.7 mm	5000 Vrms	12A@30VDC	85 Cel	12 A	.033 A			-40 Cel	1.2 V		12 A	SOLDER/QUICK CONNECT	12 V	8.4 V			Random	SILVER NICKEL	5	30 V		400 V		.1417 inch	12 V	3000VA@400VAC	AC
RUMC32BD	Schneider Electric Sa	POWER/SIGNAL RELAY
RZF1-1A6-L024	TE Connectivity	POWER/SIGNAL RELAY
SZR-LY2-N1-DC24V	Honeywell Sensing And Control	POWER/SIGNAL RELAY	PANEL MOUNT	MOMENTARY	DPDT	DC	CE; UL				25 ms			25 ms		900				650 ohm									10A@125VDC	70 Cel		.037 A			-25 Cel	2.4 V		10 A	SOLDER		19.2 V	SZR-LY					125 V	WITH LED INDICATOR				24 V		DC
TX2SL-5V-1	Panasonic	POWER/SIGNAL RELAY	SURFACE MOUNT-STRAIGHT	MOMENTARY	DPDT	DC	BSI; CSA; UL				4 ms	100000 Cycle(s)		4 ms		140	TUBE	15 mm	7.4 inch	178 ohm	WATER PROOF				15mm x 7.4mm x 8.2mm		8.2 mm		1A@220VDC	85 Cel		.028 A			-40 Cel	.5 V		1 A	SOLDER		3.75 V	TX					220 V					5 V		DC
TX2SL-5V-TH	Panasonic	POWER/SIGNAL RELAY	SURFACE MOUNT-STRAIGHT	MOMENTARY	DPDT	DC	BSI; CSA; UL	7.5A@250VAC			4 ms	100000 Cycle(s)		4 ms		140	BOX; TUBE	15 mm	7.4 inch	178 ohm	WATER PROOF				15mm x 7.4mm x 8.2mm		8.2 mm		7.5A@220VDC	85 Cel	7.5 A	.028 A			-40 Cel	.5 V		7.5 A	SOLDER		3.75 V	TX					220 V		250 V			5 V		AC/DC
TX2SL-5V-Z	Panasonic	POWER/SIGNAL RELAY	SURFACE MOUNT-STRAIGHT	MOMENTARY	DPDT	DC	BSI; CSA; UL				4 ms	100000 Cycle(s)		4 ms		140	TAPE AND REEL	15 mm	7.4 inch	178 ohm	WATER PROOF				15mm x 7.4mm x 8.2mm		8.2 mm		2A@220VDC	85 Cel		.028 A			-40 Cel	.5 V		2 A	SOLDER		3.75 V	TX					220 V					5 V		DC
TXS2SA-L-4.5V	Panasonic	POWER/SIGNAL RELAY	SURFACE MOUNT-STRAIGHT	LATCHED	DPDT	DC	BSI; CSA; UL		750 Vrms	2 FORM C	5 ms	200000 Cycle(s)	30W@110VDC	5 ms	1000000000 ohm	35	TUBE	15 mm	7.4 inch	579 ohm		2 g		8	15mm x 7.4mm x 8.2mm	GOLD	8.2 mm	1800 Vrms	1A@110VDC	70 Cel		.007 A			-40 Cel	3.6 V		1 A	SOLDER	4.5 V	3.6 V	TX-S	100 mohm	Random	Silver		110 V					4.5 V		DC
UB2-24NU-L	KEMET Corporation	POWER/SIGNAL RELAY	SURFACE MOUNT-STRAIGHT	MOMENTARY	DPDT	DC	CSA; TUV; UL	1A@250VAC	1000 Vrms	2 FORM C	2 ms	100000 Cycle(s)	30W@220VDC	1 ms	1000000000 ohm	230	TAPE AND REEL	10.6 mm	5.7 inch	2504 ohm		1 g		8	10.6mm x 5.7mm x 8.8mm	GOLD ALLOY	8.8 mm	1500 Vrms	1A@220VDC	85 Cel	1 A	.01 A			-40 Cel	2.4 V		1 A	SOLDER	24 V	18 V		100 mohm	Random	Silver Alloy	8	220 V		250 V			24 V	37.5VA@250VAC	AC/DC
1-1393243-3	TE Connectivity	POWER/SIGNAL RELAY	PANEL MOUNT	MOMENTARY	DPDT	DC	BEAB; CSA; UL; VDE	8A@400VAC	1000 Vrms	2 FORM C	10 ms	30000 Cycle(s)		5 ms		420	BOX; TUBE	29 mm	12.7 inch	8570 ohm	RT3	13 g			29mm x 12.7mm x 15.7mm		15.7 mm	5000 Vrms		85 Cel	8 A	.007 A			-40 Cel	6 V		8 A	SOLDER/QUICK CONNECT		42 V				SILVER NICKEL				400 V			60 V		AC/DC
1-1393774-8	TE Connectivity	POWER/SIGNAL RELAY	PANEL MOUNT	MOMENTARY	SPDT	DC	CSA; UL	1A@150VAC	500 Vrms	1 FORM C	2 ms	1000 Cycle(s)		2 ms		62	TUBE	13 mm	7.6 inch	36 ohm	IMMERSION CLEANABLE CASE	2 g		6	13mm x 7.6mm x 6.9mm		6.9 mm	1500 Vrms	1A@125VDC	85 Cel	1 A	.042 A			-40 Cel			1 A	SOLDER/QUICK CONNECT	1.5 V			50 mohm		LEAD NICKEL	6	125 V		150 V		137.795 inch	1.5 V		AC/DC
1-1419130-8	TE Connectivity	POWER/SIGNAL RELAY	PANEL MOUNT	MOMENTARY	SPDT	AC/DC	CSA; UL		400 Vrms	1 FORM C					1000000000000 ohm	150	BOX; TUBE	12.5 mm	7.5 inch	540 ohm		3 g					9.9 mm	1000 Vrms		80 Cel	1 A	.017 A			-30 Cel			1 A	SOLDER/QUICK CONNECT						NICKEL TITANIUM ALLOY		24 V		120 V			9 V		AC/DC
1393130-8	TE Connectivity	POWER/SIGNAL RELAY																																								1393130

Power and signal relays are electromechanical switches that are used to control power circuits and signal circuits respectively. Power relays are designed to handle higher voltages and currents, typically in the range of several hundred volts and amperes. They are commonly used in industrial and automotive applications to switch on/off motors, heaters, lights, and other high-power loads. Signal relays, on the other hand, are designed to handle lower voltages and currents, typically in the range of several volts and milliamperes. They are commonly used in electronic equipment such as computers, telecommunications equipment, and consumer electronics to switch on/off signals, data, and low-power loads.

Power and signal relays come in different types and configurations depending on the specific application requirements. Some common types include electromechanical relays, reed relays, solid-state relays, and latching relays. Electromechanical relays use a mechanical switching mechanism, typically a set of contacts that move to make or break an electrical circuit. Reed relays use a set of magnetically activated contacts that are enclosed in a sealed glass tube. Solid-state relays use a semiconductor device to switch on/off the load. Latching relays use a magnetic field to hold the contacts in either the open or closed position, eliminating the need for continuous power to maintain the relay's state.

Power and signal relays play a critical role in the overall performance and reliability of electrical and electronic systems. The selection of the appropriate relay for a given application is crucial to ensure proper operation, safety, and longevity of the system. Factors to consider when selecting a relay include the load current and voltage, switching frequency, contact rating, switching speed, contact bounce, and environmental conditions such as temperature, humidity, and vibration. Proper maintenance and testing of relays are also important to ensure their continued performance and reliability over time.