Latched Power & Signal Relays 1,282

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Part RoHS 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 AC Coil Release Voltage Relay Form AC Coil Operate Voltage Operate Time Maximum Contact AC Rating (M Load) 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 Maximum Contact AC Power Rating (M Load) 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 Minimum Operating Frequency Terminal Length Maximum DC Coil Voltage Maximum Operating Frequency Maximum Contact AC Power Rating (R Load) Contact or Output Supply Type

G6KU-2G-Y4.5VDC-TR

Omron

Power/Signal Relay

Surface Mount-Straight

Latched

DPDT

DC

BSI; CSA; UL

0.3A@125VAC

750 Vrms

2 Form C

3 ms

100000 Cycle(s)

3 ms

1 GΩ

100 mW

Tape and Reel, 13 in

0.394 in (10 mm)

6.5 in (165.1 mm)

194 Ω

Sealed Type

700 mg

8

0.394 x 0.256 x 0.213 in (10 x 6.5 x 5.4 mm)

0.213 in (5.4 mm)

1.5 kVrms

1A@30VDC

70 °C (158 °F)

300 mA

23 mA

-40 °C (-40 °F)

3.38 V

Tin

1 A

Solder

4.5 V

3.38 V

100 mΩ

Random

Silver

30 V

125 V

e3

6.75 V

AC/DC

G2AK-2321P50VAC

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

DPDT

AC

3A@250VAC

25 ms

5000000 Cycle(s)

25 ms

2 W

1.122 in (28.5 mm)

21.5 in (546.1 mm)

590 Ω

34 mA

1.122 x 0.846 x 1.673 in (28.5 x 21.5 x 42.5 mm)

1.673 in (42.5 mm)

3A@125VDC

40 °C (104 °F)

3 A

50 V

-10 °C (14 °F)

3 A

Solder

125 V

Coil Operate Voltage (AC): 40 V, Coil Release Voltage (AC): 40 V

250 V

AC/DC

G6AU-474P-ST-US-DC12

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

4PDT

DC

CSA; UL

0.5A@125VAC

707.21 Vrms

4 Form C

7 ms

500000 Cycle(s)

60W@220VDC

7 ms

1 GΩ

320 mW

1.394 in (35.4 mm)

10.1 in (256.54 mm)

450 Ω

6 g

14

1.394 x 0.398 x 0.331 in (35.4 x 10.1 x 8.4 mm)

Gold

0.331 in (8.4 mm)

707.21 Vrms

2A@30VDC

70 °C (158 °F)

500 mA

27 mA

0.25A@125VAC

-40 °C (-40 °F)

1.2 V

2 A

Solder

12 V

8.4 V

G6A

50 mΩ

Random

Silver

14

30 V

125 V

0.1181 in (3 mm)

12 V

125VA@250VAC

AC/DC

G6AK-434P-ST-US-DC9

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

4PDT

DC

CSA; UL

0.6A@125VAC

7.5 ms

7.5 ms

320 mW

1.394 in (35.4 mm)

10.1 in (256.54 mm)

253 Ω

1.394 x 0.398 x 0.331 in (35.4 x 10.1 x 8.4 mm)

0.331 in (8.4 mm)

1A@30VDC

70 °C (158 °F)

600 mA

36 mA

-40 °C (-40 °F)

6.3 V

1 A

Solder

6.3 V

G6A

30 V

125 V

9 V

AC/DC

G6KU-2F-YDC12

Omron

Power/Signal Relay

Surface Mount-Straight

Latched

DPDT

DC

BSI; CSA; UL

0.3A@125VAC

750 Vrms

2 Form C

3 ms

100000 Cycle(s)

3 ms

1 GΩ

100 mW

Tube

0.394 in (10 mm)

6.5 in (165.1 mm)

1.315 kΩ

Sealed Type

700 mg

8

0.394 x 0.256 x 0.205 in (10 x 6.5 x 5.2 mm)

0.205 in (5.2 mm)

1.5 kVrms

1A@30VDC

70 °C (158 °F)

300 mA

9 mA

-40 °C (-40 °F)

9 V

Tin

1 A

Solder

12 V

9 V

100 mΩ

Random

Silver

30 V

125 V

e3

18 V

AC/DC

G2AK-232A6VDC

Omron

Power/Signal Relay

Socket Mount

Latched

DPDT

DC

3A@250VAC

15 ms

5000000 Cycle(s)

15 ms

2.2 W

1.122 in (28.5 mm)

21.5 in (546.1 mm)

14 Ω

1.122 x 0.846 x 1.673 in (28.5 x 21.5 x 42.5 mm)

1.673 in (42.5 mm)

3A@125VDC

40 °C (104 °F)

3 A

360 mA

-10 °C (14 °F)

4.8 V

3 A

Snap-On

4.8 V

125 V

250 V

6 V

AC/DC

G6AK-474P-ST-US-DC48

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

4PDT

DC

CSA; UL

0.5A@125VAC

707.21 Vrms

4 Form C

7 ms

500000 Cycle(s)

60W@220VDC

7 ms

1 GΩ

320 mW

1.394 in (35.4 mm)

10.1 in (256.54 mm)

7.2 kΩ

6 g

16

1.394 x 0.398 x 0.331 in (35.4 x 10.1 x 8.4 mm)

Gold

0.331 in (8.4 mm)

707.21 Vrms

2A@30VDC

70 °C (158 °F)

500 mA

7 mA

0.25A@125VAC

-40 °C (-40 °F)

4.8 V

2 A

Solder

48 V

33.6 V

G6A

50 mΩ

Random

Silver

16

30 V

125 V

0.1181 in (3 mm)

48 V

125VA@250VAC

AC/DC

G6CU-2117C-US-24VDC

Omron

Power/Signal Relay

Socket Mount

Latched

DPST

DC

CSA; SEV; UL; VDE

8A@250VAC

15 ms

100000 Cycle(s)

15 ms

200 mW

0.787 in (20 mm)

15 in (381 mm)

2.88 kΩ

0.787 x 0.591 x 0.394 in (20 x 15 x 10 mm)

0.394 in (10 mm)

8A@125VDC

70 °C (158 °F)

8 A

8 mA

-25 °C (-13 °F)

16.8 V

8 A

Snap-On

16.8 V

125 V

250 V

24 V

AC/DC

MJN2CK-AC6

Omron

Power/Signal Relay

Panel Mount

Latched

DPDT

AC

CSA; UL

10A@240VAC

20 ms

100000 Cycle(s)

10 ms

1.7 W

5.5 Ω

1.09 A

10A@28VDC

60 °C (140 °F)

10 A

6 V

-45 °C (-49 °F)

10 A

Quick Connect

MJN

28 V

Coil Operate Voltage (AC): 5.1 V

240 V

AC/DC

MM3K,48VDC

Omron

Power/Signal Relay

Panel Mount

Latched

3PDT

DC

10A@250VAC

30 ms

500000 Cycle(s)

30 ms

2.7 W

2.303 in (58.5 mm)

50 in (1270 mm)

930 Ω

2.303 x 1.969 x 3.701 in (58.5 x 50 x 94 mm)

3.701 in (94 mm)

10A@250VDC

55 °C (131 °F)

10 A

52 mA

-10 °C (14 °F)

10 A

Solder

38.4 V

250 V

250 V

48 V

AC/DC

G2RK-2A-24VDC

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

DPST

DC

CSA; SEMKO; SEV; UL; VDE

5A@380VAC

15 ms

100000 Cycle(s)

5 ms

850 mW

Tray

1.142 in (29 mm)

13 in (330.2 mm)

694 Ω

17 g

1.142 x 0.512 x 1.004 in (29 x 13 x 25.5 mm)

1.004 in (25.5 mm)

5A@125VDC

70 °C (158 °F)

5 A

35 mA

-40 °C (-40 °F)

16.8 V

5 A

Solder

16.8 V

125 V

380 V

24 V

AC/DC

G6SK-2DC9

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

DPDT

DC

CSA; UL

0.5A@125VAC

4.5 ms

4.5 ms

200 mW

Tube

0.583 in (14.8 mm)

7.3 in (185.42 mm)

405 Ω

0.583 x 0.287 x 0.362 in (14.8 x 7.3 x 9.2 mm)

0.362 in (9.2 mm)

2A@30VDC

85 °C (185 °F)

500 mA

22 mA

-40 °C (-40 °F)

6.75 V

2 A

Solder

6.75 V

30 V

125 V

9 V

AC/DC

G6HU-2-U5VDC

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

DPDT

DC

CSA; UL

1A@125VAC

3 ms

200000 Cycle(s)

3 ms

100 mW

0.563 in (14.3 mm)

9.3 in (236.22 mm)

250 Ω

0.563 x 0.366 x 0.213 in (14.3 x 9.3 x 5.4 mm)

0.213 in (5.4 mm)

1A@110VDC

70 °C (158 °F)

1 A

20 mA

-40 °C (-40 °F)

3.75 V

1 A

Solder

3.75 V

G6H

110 V

125 V

5 V

AC/DC

G6CU-2117P-USP6C-12

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

DPST

DC

CSA; SEV; TUV; UL; VDE

8A@250VAC

15 ms

100000 Cycle(s)

15 ms

200 mW

0.787 in (20 mm)

15 in (381 mm)

720 Ω

0.787 x 0.591 x 0.394 in (20 x 15 x 10 mm)

0.394 in (10 mm)

8A@125VDC

70 °C (158 °F)

8 A

17 mA

-25 °C (-13 °F)

1.2 V

8 A

Solder

8.4 V

125 V

Socket Mountable

250 V

12 V

AC/DC

MJN2CK-DC110

Omron

Power/Signal Relay

Panel Mount

Latched

DPDT

DC

CSA; UL

10A@240VAC

20 ms

100000 Cycle(s)

10 ms

1.2 W

5.125 kΩ

10A@28VDC

70 °C (158 °F)

10 A

21 mA

-45 °C (-49 °F)

10 A

Quick Connect

82.5 V

MJN

28 V

240 V

110 V

AC/DC

G6CU-2117P-USP6C-6

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

DPST

DC

CSA; SEV; TUV; UL; VDE

8A@250VAC

15 ms

100000 Cycle(s)

15 ms

200 mW

0.787 in (20 mm)

15 in (381 mm)

180 Ω

0.787 x 0.591 x 0.394 in (20 x 15 x 10 mm)

0.394 in (10 mm)

8A@125VDC

70 °C (158 °F)

8 A

34 mA

-25 °C (-13 °F)

600 mV

8 A

Solder

4.2 V

125 V

Socket Mountable

250 V

6 V

AC/DC

G6CK-2114C-US-24

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

DPST

DC

CSA; SEV; TUV; UL; VDE

8A@250VAC

15 ms

100000 Cycle(s)

15 ms

280 mW

0.787 in (20 mm)

15 in (381 mm)

2.056 kΩ

0.787 x 0.591 x 0.394 in (20 x 15 x 10 mm)

0.394 in (10 mm)

8A@125VDC

70 °C (158 °F)

8 A

12 mA

-25 °C (-13 °F)

2.4 V

8 A

Solder

16.8 V

125 V

250 V

24 V

AC/DC

G6CU-1117P-USDC3

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

SPST

DC

CSA; UL; VDE

10A@250VAC

10 ms

10 ms

200 mW

0.79 in (20.06 mm)

14.98 in (380.492 mm)

45 Ω

0.79 x 0.59 x 0.39 in (20.06 x 14.98 x 9.9 mm)

0.39 in (9.9 mm)

10A@30VDC

10 A

67 mA

2.1 V

10 A

Solder

2.1 V

G6C

30 V

250 V

3 V

AC/DC

G2RK-2A-DC3

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

DPST

DC

CSA; SEMKO; TUV; UL; VDE

3A@250VAC

20 ms

20 ms

850 mW

1.14 in (28.95 mm)

12.95 in (328.93 mm)

11 Ω

17 g

1.14 x 0.51 x 1 in (28.95 x 12.95 x 25.4 mm)

1 in (25.4 mm)

3A@30VDC

70 °C (158 °F)

3 A

227 mA

-40 °C (-40 °F)

2.1 V

3 A

Solder

2.1 V

30 V

250 V

3 V

AC/DC

MM2K,200/220VAC

Omron

Power/Signal Relay

Panel Mount

Latched

DPDT

AC

10A@250VAC

30 ms

500000 Cycle(s)

30 ms

2.975 W

2.303 in (58.5 mm)

44 in (1117.6 mm)

1.54 kΩ

24 mA

2.303 x 1.732 x 3.386 in (58.5 x 44 x 86 mm)

3.386 in (86 mm)

10A@250VDC

55 °C (131 °F)

10 A

220 V

-10 °C (14 °F)

10 A

Solder

MMK

250 V

AC Coil Operate Voltage: 176

250 V

AC/DC

G6C-U-1114P-USDC24

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

SPST

DC

CSA; TUV; UL; VDE

10A@380VAC

1 Form A

10 ms

100000 Cycle(s)

10 ms

1 GΩ

200 mW

Tray

0.787 in (20 mm)

15 in (381 mm)

2.88 kΩ

4

0.787 x 0.591 x 0.394 in (20 x 15 x 10 mm)

0.394 in (10 mm)

10A@125VDC

70 °C (158 °F)

8 mA

-25 °C (-13 °F)

16.8 V

10 A

Solder

24 V

16.8 V

30 mΩ

Silver Alloy

125 V

380 V

0.126 in (3.2 mm)

38.4 V

AC/DC

G6CU-1114C-USP6C-24

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

SPST

DC

CSA; SEV; TUV; UL; VDE

10A@250VAC

15 ms

100000 Cycle(s)

15 ms

200 mW

0.787 in (20 mm)

15 in (381 mm)

2.88 kΩ

0.787 x 0.591 x 0.394 in (20 x 15 x 10 mm)

0.394 in (10 mm)

10A@125VDC

70 °C (158 °F)

10 A

9 mA

-25 °C (-13 °F)

2.4 V

10 A

Solder

16.8 V

125 V

Socket Mountable

250 V

24 V

AC/DC

G6CU-1117C-USP6C-24

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

SPST

DC

CSA; SEV; TUV; UL; VDE

10A@250VAC

15 ms

100000 Cycle(s)

15 ms

200 mW

0.787 in (20 mm)

15 in (381 mm)

2.88 kΩ

0.787 x 0.591 x 0.394 in (20 x 15 x 10 mm)

0.394 in (10 mm)

10A@125VDC

70 °C (158 °F)

10 A

9 mA

-25 °C (-13 °F)

2.4 V

10 A

Solder

16.8 V

125 V

Socket Mountable

250 V

24 V

AC/DC

G2AK-2321PAC100

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

DPDT

AC

0.3A@110VAC

25 ms

5000000 Cycle(s)

25 ms

2 W

1.161 in (29.5 mm)

22.5 in (571.5 mm)

2.15 kΩ

19 mA

1.161 x 0.886 x 1.673 in (29.5 x 22.5 x 42.5 mm)

1.673 in (42.5 mm)

0.5A@24VDC

40 °C (104 °F)

300 mA

100 V

-10 °C (14 °F)

500 mA

Solder

24 V

Coil Operate Voltage (AC): 80 V, Coil Release Voltage (AC): 80 V

110 V

AC/DC

MM4KB,100/110VAC

Omron

Power/Signal Relay

Panel Mount

Latched

4PDT

AC

10A@250VAC

30 ms

500000 Cycle(s)

30 ms

5.1 W

2.677 in (68 mm)

58.5 in (1485.9 mm)

141 Ω

77 mA

2.677 x 2.303 x 3.976 in (68 x 58.5 x 101 mm)

3.976 in (101 mm)

10A@250VDC

55 °C (131 °F)

10 A

110 V

-10 °C (14 °F)

10 A

Solder

MMK

250 V

AC Coil Operate Voltage: 88

250 V

AC/DC

G6SK-2-H-TRDC4.5

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

DPDT

DC

CSA; UL

0.5A@125VAC

4.5 ms

4.5 ms

140 mW

Tape and Reel

0.583 in (14.8 mm)

7.3 in (185.42 mm)

145 Ω

0.583 x 0.287 x 0.362 in (14.8 x 7.3 x 9.2 mm)

0.362 in (9.2 mm)

2A@30VDC

85 °C (185 °F)

500 mA

31 mA

-40 °C (-40 °F)

3.375 V

2 A

Solder

3.375 V

30 V

125 V

4.5 V

AC/DC

G6SK-2F-H-TRDC3

Omron

Power/Signal Relay

Surface Mount-Straight

Latched

DPDT

DC

CSA; UL

0.5A@125VAC

4.5 ms

4.5 ms

140 mW

Tape and Reel

0.583 in (14.8 mm)

7.3 in (185.42 mm)

64.3 Ω

0.583 x 0.287 x 0.362 in (14.8 x 7.3 x 9.2 mm)

0.362 in (9.2 mm)

2A@30VDC

85 °C (185 °F)

500 mA

47 mA

-40 °C (-40 °F)

2.25 V

2 A

Solder

2.25 V

30 V

125 V

3 V

AC/DC

G6KU-2P-Y-TR-DC12

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

DPDT

DC

BSI; CSA; UL

0.3A@125VAC

750 Vrms

2 Form C

3 ms

100000 Cycle(s)

3 ms

1 GΩ

100 mW

Tape and Reel, 13 in

0.394 in (10 mm)

6.5 in (165.1 mm)

1.315 kΩ

Sealed Type

700 mg

8

0.394 x 0.256 x 0.197 in (10 x 6.5 x 5 mm)

0.197 in (5 mm)

1.5 kVrms

1A@30VDC

70 °C (158 °F)

300 mA

9 mA

-40 °C (-40 °F)

9 V

Tin

1 A

Solder

12 V

9 V

100 mΩ

Random

Silver

8

30 V

125 V

e3

0.1378 in (3.5 mm)

18 V

AC/DC

G6SK-2F-H-TRDC2.4

Omron

Power/Signal Relay

Surface Mount-Straight

Latched

DPDT

DC

CSA; UL

2A@250VAC

2 Form C

4 ms

100000 Cycle(s)

4 ms

1 GΩ

Tape and Reel, 13 in

0.583 in (14.8 mm)

7.3 in (185.42 mm)

10

0.583 x 0.287 x 0.362 in (14.8 x 7.3 x 9.2 mm)

0.362 in (9.2 mm)

2A@220VDC

85 °C (185 °F)

2 A

-40 °C (-40 °F)

9 V

2 A

Solder

2.4 V

75 mΩ

Random

Silver

220 V

250 V

AC/DC

G6KU-2F-Y-3-TRDC2.4

Omron

Power/Signal Relay

Surface Mount-Straight

Latched

DPDT

DC

BSI; CSA; UL

1A@125VAC

2 Form C

3 ms

100000 Cycle(s)

3 ms

1 GΩ

Tape and Reel, 13 in

0.394 in (10 mm)

6.5 in (165.1 mm)

8

0.394 x 0.256 x 0.205 in (10 x 6.5 x 5.2 mm)

0.205 in (5.2 mm)

1A@60VDC

70 °C (158 °F)

1 A

-40 °C (-40 °F)

1 A

Solder

2.4 V

100 mΩ

Random

Silver

60 V

Low Profile

125 V

AC/DC

G6SK-2F-SS-TRDC12

Omron

Power/Signal Relay

Surface Mount-Straight

Latched

DPDT

DC

CSA; UL

2A@250VAC

2 Form C

4 ms

100000 Cycle(s)

4 ms

1 GΩ

200 mW

Tape and Reel, 13 in

0.583 in (14.8 mm)

7.3 in (185.42 mm)

720 Ω

10

0.583 x 0.287 x 0.362 in (14.8 x 7.3 x 9.2 mm)

0.362 in (9.2 mm)

2A@220VDC

85 °C (185 °F)

2 A

17 mA

-40 °C (-40 °F)

9 V

2 A

Solder

12 V

9 V

75 mΩ

Random

Silver

220 V

250 V

20.4 V

AC/DC

G6SK-2-HDC2.4

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

DPDT

DC

CSA; UL

2A@250VAC

2 Form C

4 ms

100000 Cycle(s)

4 ms

1 GΩ

Tube

0.583 in (14.8 mm)

7.3 in (185.42 mm)

10

0.583 x 0.287 x 0.362 in (14.8 x 7.3 x 9.2 mm)

0.362 in (9.2 mm)

2A@220VDC

85 °C (185 °F)

2 A

-40 °C (-40 °F)

9 V

2 A

Solder

2.4 V

75 mΩ

Random

Silver

220 V

250 V

0.1181 in (3 mm)

AC/DC

G6AK-274PDC5

Omron

Power/Signal Relay

Through Hole-Straight Mount

Latched

DPDT

DC

2A@250VAC

2 Form C

5 ms

500000 Cycle(s)

5 ms

1 GΩ

180 mW

Tube

0.795 in (20.2 mm)

10.1 in (256.54 mm)

139 Ω

10

0.795 x 0.398 x 0.331 in (20.2 x 10.1 x 8.4 mm)

0.331 in (8.4 mm)

2A@220VDC

70 °C (158 °F)

2 A

36 mA

-40 °C (-40 °F)

3.5 V

2 A

Solder

5 V

3.5 V

50 mΩ

Random

Silver Gold Alloy

220 V

250 V

0.1181 in (3 mm)

10 V

AC/DC

MK2KP48DC

Omron

Power/Signal Relay

Socket Mount

Latched

DPDT

DC

5A@250VAC

2 Form C

30 ms

500000 Cycle(s)

72W@250VDC

30 ms

100 MΩ

1.358 in (34.5 mm)

34.5 in (876.3 mm)

11

1.358 x 1.358 x 2.067 in (34.5 x 34.5 x 52.5 mm)

2.067 in (52.5 mm)

5A@250VDC

40 °C (104 °F)

5 A

-10 °C (14 °F)

38.4 V

5 A

Snap-On

48 V

38.4 V

50 mΩ

Random

Silver

250 V

Built-In Indicator, Panel Mountable

250 V

52.8 V

1100VA@250VAC

AC/DC

Power & Signal Relays

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.