DC Time Delay Relays 27

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Manufacturers
    • Abb
    • Carlo Gavazzi Holding Ag
    • Eaton Corporation
    • Esterline Technologies
    • Finder
    • Littelfuse
    • Microchip Technology
    • Nte Electronics
    • Omron
    • Phoenix Contact
    • Schneider Electric Sa
    • Siemens
    • TE Connectivity
Relay Type
    • Interval-Delay Relay
    • Multi-Delay Relay
    • Off-Delay Relay
    • On-Delay Relay
Mounting Feature
    • DIN-Rail Mount
    • DIN-Rail/Panel Mount
    • Panel Mount
    • Socket Mount
    • Surface Mount-Straight
Relay Action
    • Momentary
Relay Function
    • 4PDT-CO
    • DPDT
    • DPDT-CO
    • DPST
    • SPDT
    • SPST
Coil or Input Supply Type (1)
    • DC
    • AC
    • AC/DC
Reference Standard
    • CCC; CE; CSA; C-TICK; EAC; UL
    • CCC; CE; CSA; EAC; UL
    • CE
    • CE; CSA; EN; IEC; UL
    • CE; CSA; FM
    • CE; CSA; FM; UL
    • CE; CSA; IEC; EN; UL
    • CE; CSA; IEC; EN; UL; VDE
    • CE; CSA; IEC; UL; VDE
    • CE; CSA; UL
    • CE; CUL; GL; GOST; UL
    • CE; CUL; UL
    • CSA; UL
    • CUL; EAC; GL; UL
    • CUL; IEC; UL
    • MIL-PRF-83726/24
    • UL; CUL
Maximum Contact AC Rating (R Load)
    • 10A@115VAC
    • 10A@120VAC
    • 10A@125VAC
    • 10A@240VAC
    • 10A@277VAC
    • 10A@30VAC
    • 15A@240VAC
    • 30A@240VAC
    • 30A@400VAC
    • 3A@240VAC
    • 4A@240VAC
    • 5A@240VAC
    • 5A@250VAC
    • 5A@32VAC
Dielectric Strength Between Open Contacts
    • 1 kVrms
AC Coil Release Voltage
    • 24 V
Relay Form
    • 1 Form C
    • 2 Form A
    • 2 Form C
    • 4 Form C
AC Coil Operate Voltage
    • 204 V
Electrical Life
    • 100000 Cycle(s)
    • 1000000 Cycle(s)
    • 200000 Cycle(s)
    • 500000 Cycle(s)
    • 70000 Cycle(s)
Insulation Resistance
    • 1 GΩ
Coil Power (mW)
    • 1.7 W
    • 2 W
    • 2.25 W
    • 3 W
    • 3.08 W
    • 300 mW
    • 4 W
    • 4.5 W
    • 5.61 W
    • 500 mW
    • 750 mW
Packing Method
    • Bulk
Body Length/Diameter
    • 0.81 in (20.57 mm)
    • 1.015 in (25.79 mm)
    • 1.025 in (26.04 mm)
    • 1.531 in (38.9 mm)
    • 1.882 in (47.8 mm)
    • 1.969 in (50 mm)
    • 2 in (50.8 mm)
    • 2.39 in (60.7 mm)
    • 2.406 in (61.1 mm)
    • 2.5 in (63.5 mm)
    • 2.677 in (68 mm)
    • 2.835 in (72 mm)
    • 3.102 in (78.8 mm)
    • 3.11 in (79 mm)
    • 3.15 in (80 mm)
    • 3.248 in (82.5 mm)
    • 3.25 in (82.55 mm)
    • 3.386 in (86 mm)
    • 3.543 in (90 mm)
    • 3.937 in (100 mm)
    • 4.52 in (114.8 mm)
Body Width
    • 10.41 in (264.414 mm)
    • 13.21 in (335.534 mm)
    • 13.34 in (338.836 mm)
    • 17.5 in (444.5 mm)
    • 17.6 in (447.04 mm)
    • 22.5 in (571.5 mm)
    • 23 in (584.2 mm)
    • 25.79 in (655.066 mm)
    • 26.04 in (661.416 mm)
    • 35.7 in (906.78 mm)
    • 36 in (914.4 mm)
    • 38.6 in (980.44 mm)
    • 45.2 in (1148.08 mm)
    • 47.8 in (1214.12 mm)
    • 50 in (1270 mm)
    • 50.8 in (1290.32 mm)
    • 56 in (1422.4 mm)
    • 6.2 in (157.48 mm)
    • 65.3 in (1658.62 mm)
    • 78.49 in (1993.646 mm)
Coil Resistance
    • 192 Ω
    • 200 Ω
    • 254.55 Ω
    • 3 kΩ
    • 33.882353 kΩ
    • 34.28571 kΩ
Sealing
    • Corrosion Proof; IP20
    • DIN Case
    • Dust Proof
    • Hermetically Sealed
    • IP20
    • IP20, Corrosion Proof
    • IP30
    • IP51
    • IP5K4
    • Plastic Sealed
Weight
    • 100 g
    • 120 g
Maximum AC Coil Current
    • 10 mA
    • 13 mA
    • 17 mA
    • 18 mA
    • 23 mA
    • 25 mA
    • 3 A
No. of Terminals
    • 6
    • 9
Physical Dimension
    • 100mm x 17.5mm x 91.6mm
    • 114.8 X 65.3 X 71.9
    • 114.8 X 65.3 X 78.5
    • 114.8 X 82.55 X 78.48
    • 114.8 X 82.55 X 78.5
    • 20.57mm x 10.41mm x 16.27mm
    • 25.79 X 25.79 X 25.4
    • 26.04mm x 13.21mm x 38.61mm
    • 26.04mm x 13.34mm x 38.61mm
    • 26.04mm x 26.04mm x 25.65mm
    • 38.9mm x 35.7mm x 48.4mm
    • 47.8mm x 47.8mm x 71.9mm
    • 50 X 50 X 83
    • 50.8mm X 50.8mm X 19mm
    • 56 X 68 X 97
    • 60.7mm X 45.2mm X 81.3mm
    • 61.1mm x 45.2mm x 74.6mm
    • 63.5 X 38.6 X 123.9
    • 72 X 36 X 90
    • 78.8mm X 22.5mm X 101mm
    • 79mm X 22.5mm X 100mm
    • 80mm X 17.5mm X 63mm
    • 80mm x 6.2mm x 86mm
    • 82.5mm X 22.5mm X 103mm
    • 86mm x 22.5mm x 86mm
    • 86mm x 6.2mm x 80mm
    • 90mm x 17.6mm x 65mm
Body Height
    • 0.641 in (16.27 mm)
    • 0.748 in (19 mm)
    • 1 in (25.4 mm)
    • 1.01 in (25.65 mm)
    • 1.52 in (38.61 mm)
    • 1.906 in (48.4 mm)
    • 2.48 in (63 mm)
    • 2.559 in (65 mm)
    • 2.831 in (71.9 mm)
    • 2.937 in (74.6 mm)
    • 3.15 in (80 mm)
    • 3.201 in (81.3 mm)
    • 3.268 in (83 mm)
    • 3.386 in (86 mm)
    • 3.543 in (90 mm)
    • 3.606 in (91.6 mm)
    • 3.819 in (97 mm)
    • 3.937 in (100 mm)
    • 3.976 in (101 mm)
    • 4.055 in (103 mm)
    • 4.25 in (107.95 mm)
    • 4.878 in (123.9 mm)
Dielectric Strength Between Coil & Contacts
    • 2 kVrms
Maximum Contact DC Rating (R Load)
    • 0.15A@2VDC
    • 10A@28VDC
    • 10A@30VDC
    • 15A@24VDC
    • 15A@30VDC
    • 1A@125VDC
    • 20A@28VDC
    • 3A@240VDC
    • 3A@48VDC
    • 5A@28VDC
    • 5A@30VDC
    • 5A@32VDC
Maximum Operating Temperature
    • 125 °C (257 °F)
    • 40 °C (104 °F)
    • 55 °C (131 °F)
    • 60 °C (140 °F)
    • 65 °C (149 °F)
    • 70 °C (158 °F)
    • 75 °C (167 °F)
    • 80 °C (176 °F)
    • 85 °C (185 °F)
Maximum AC Contact Current
    • 10 A
    • 15 A
    • 3 A
    • 30 A
    • 4 A
    • 5 A
Maximum DC Coil Current
    • 10 mA
    • 110 mA
    • 125 mA
    • 150 mA
    • 7 mA
Maximum AC Coil Voltage
    • 120 V
    • 208 V
    • 230 V
    • 240 V
    • 264 V
    • 415 V
    • 480 V
Maximum Adjustable Time Delay
    • 1 h
    • 1 m
    • 1 m 40 s
    • 1 s
    • 10 m
    • 10 s
    • 15 s
    • 16 h 40 m
    • 2 d 12 h
    • 2 h 46 m 30 s
    • 2 s
    • 20 s
    • 3 m
    • 3 m 20 s
    • 3 s
    • 30 m
    • 30 s
    • 4 d 4 h
    • 5 m
    • 5 s
    • 50 s
    • 500 ms
    • 8 m 20 s
Minimum Operating Temperature
    • -10 °C (14 °F)
    • -20 °C (-4 °F)
    • -25 °C (-13 °F)
    • -30 °C (-22 °F)
    • -40 °C (-40 °F)
    • -55 °C (-67 °F)
    • 21 °C (69.8 °F)
DC Coil Release Voltage
    • 24 V
Terminal Finish
    • Gold
    • Tin
Fixed Time Delay
    • 1 s
    • 10 s
    • 2 s
    • 200 ms
    • 25 s
    • 3 m
    • 3 s
    • 30 s
    • 300 ms
    • 500 ms
Maximum DC Contact Current
    • 1 A
    • 1.5 A
    • 10 A
    • 15 A
    • 150 mA
    • 20 A
    • 3 A
    • 5 A
Termination Type
    • Quick Connect
    • Screw
    • Screw and Snap-on
    • Snap-on
    • Solder Hook
    • Solder/Quick Connect
Nominal Coil Voltage
    • 24 V
    • 240 V
    • 48 V
DC Coil Operate Voltage
    • 19.2 V
    • 192 V
    • 20.4 V
    • 204 V
    • 40.8 V
Manufacturer Series
    • 7PV1518-1AW30
    • ETD-FL-2T-DTI
    • ETD-SL-1T-DTF
    • H5F
    • HRDB
    • KRDB
    • TDM
Minimum Adjustable Time Delay
    • 1 m
    • 1 s
    • 1.5 s
    • 1.8 s
    • 10 m
    • 10 s
    • 100 ms
    • 2 s
    • 20 s
    • 200 ms
    • 3 m
    • 3 s
    • 300 ms
    • 5 s
    • 50 ms
    • 50 s
    • 500 ms
    • 6 m
    • 6 s
    • 600 ms
Input Switching Control Type
    • Random
End Contact Material
    • Silver Cadmium Oxide
    • Silver Nickel
Maximum DC Contact Voltage
    • 125 V
    • 2 V
    • 24 V
    • 240 V
    • 28 V
    • 30 V
    • 32 V
    • 48 V
Additional Features
    • Adjustable Time Delay-Max can be upto 10 days
    • Coil Operate Voltage(AC): 102 V
    • Coil Operate Voltage(AC): 192 V
    • Coil Operate Voltage(AC): 204 V
    • Coil Power (AC): 5 VA
    • Delay Time 3 Cycle to 120 Cycle
    • Other Timing Ranges also available
    • Panel Mountable
    • With Control Contact
Maximum AC Contact Voltage
    • 115 V
    • 120 V
    • 125 V
    • 240 V
    • 250 V
    • 277 V
    • 30 V
    • 32 V
    • 400 V
    • 440 V
JESD-609 Code
    • e3
    • e4
Maximum DC Coil Voltage
    • 120 V
    • 125 V
    • 24 V
    • 240 V
    • 264 V
    • 28 V
    • 30 V
    • 48 V
    • 57.6 V
Contact or Output Supply Type
    • AC
    • AC/DC
    • DC
Reset All
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 Electrical Life 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 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 Adjustable Time Delay Minimum Operating Temperature DC Coil Release Voltage Terminal Finish Fixed Time Delay Maximum DC Contact Current Termination Type Nominal Coil Voltage DC Coil Operate Voltage Manufacturer Series Minimum Adjustable Time Delay Input Switching Control Type End Contact Material Maximum DC Contact Voltage Additional Features Maximum AC Contact Voltage JESD-609 Code Maximum DC Coil Voltage Contact or Output Supply Type

CB-1039D-38

TE Connectivity

Off-Delay Relay

Socket Mount

Momentary

DPDT

DC

CSA; UL

10A@277VAC

100000 Cycle(s)

3 W

2.406 in (61.1 mm)

45.2 in (1148.08 mm)

192 Ω

61.1mm x 45.2mm x 74.6mm

2.937 in (74.6 mm)

10A@30VDC

55 °C (131 °F)

10 A

125 mA

3 m

-10 °C (14 °F)

10 A

Snap-on

1.8 s

30 V

277 V

24 V

AC/DC

CDD-38-30003

TE Connectivity

On-Delay Relay

Socket Mount

Momentary

DPDT

DC

CSA; UL

10A@277VAC

100000 Cycle(s)

3 W

2.406 in (61.1 mm)

45.2 in (1148.08 mm)

192 Ω

61.1mm x 45.2mm x 74.6mm

2.937 in (74.6 mm)

10A@30VDC

55 °C (131 °F)

10 A

125 mA

10 s

-40 °C (-40 °F)

10 A

Snap-on

100 ms

30 V

277 V

24 V

AC/DC

7012PJSX

TE Connectivity

On-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

75 °C (167 °F)

10 A

-30 °C (-22 °F)

Solder/Quick Connect

Delay Time 3 Cycle to 120 Cycle

240 V

125 V

AC

7012PJL

TE Connectivity

On-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

75 °C (167 °F)

10 A

-30 °C (-22 °F)

Solder/Quick Connect

Delay Time 3 Cycle to 120 Cycle

240 V

125 V

AC

7022PDMS

TE Connectivity

Off-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

Dust Proof

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

75 °C (167 °F)

10 A

50 s

-30 °C (-22 °F)

Solder/Quick Connect

5 s

240 V

125 V

AC

7022PD

TE Connectivity

Off-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

75 °C (167 °F)

10 A

50 s

-30 °C (-22 °F)

Solder/Quick Connect

5 s

240 V

125 V

AC

7012PE

TE Connectivity

On-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

75 °C (167 °F)

10 A

3 m 20 s

-30 °C (-22 °F)

Solder/Quick Connect

20 s

240 V

125 V

AC

7022OB

TE Connectivity

Off-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

75 °C (167 °F)

10 A

5 s

-30 °C (-22 °F)

Solder/Quick Connect

500 ms

240 V

24 V

AC

7012OE

TE Connectivity

On-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

75 °C (167 °F)

10 A

3 m 20 s

-30 °C (-22 °F)

Solder/Quick Connect

20 s

240 V

24 V

AC

7012PA

TE Connectivity

On-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

100000 Cycle(s)

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

15A@30VDC

75 °C (167 °F)

10 A

1 s

-30 °C (-22 °F)

15 A

Solder/Quick Connect

100 ms

30 V

240 V

125 V

AC/DC

7012PB

TE Connectivity

On-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

100000 Cycle(s)

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

15A@30VDC

75 °C (167 °F)

10 A

5 s

-30 °C (-22 °F)

15 A

Solder/Quick Connect

500 ms

30 V

240 V

125 V

AC/DC

7012PC

TE Connectivity

On-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

100000 Cycle(s)

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

15A@30VDC

75 °C (167 °F)

10 A

15 s

-30 °C (-22 °F)

15 A

Solder/Quick Connect

1.5 s

30 V

240 V

125 V

AC/DC

7012PD

TE Connectivity

On-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

100000 Cycle(s)

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

15A@30VDC

75 °C (167 °F)

10 A

50 s

-30 °C (-22 °F)

15 A

Solder/Quick Connect

5 s

30 V

240 V

125 V

AC/DC

7012PF

TE Connectivity

On-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

100000 Cycle(s)

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

15A@30VDC

75 °C (167 °F)

10 A

10 m

-30 °C (-22 °F)

15 A

Solder/Quick Connect

1 m

30 V

240 V

125 V

AC/DC

7012PJ

TE Connectivity

On-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

100000 Cycle(s)

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

15A@30VDC

75 °C (167 °F)

10 A

2 s

-30 °C (-22 °F)

15 A

Solder/Quick Connect

50 ms

30 V

Delay Time 3 Cycle to 120 Cycle

240 V

125 V

AC/DC

7022PC

TE Connectivity

Off-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

100000 Cycle(s)

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

15A@30VDC

75 °C (167 °F)

10 A

15 s

-30 °C (-22 °F)

15 A

Solder/Quick Connect

1.5 s

30 V

240 V

125 V

AC/DC

7012OD

TE Connectivity

On-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

75 °C (167 °F)

10 A

50 s

-30 °C (-22 °F)

Solder/Quick Connect

5 s

240 V

24 V

AC

7012PH

TE Connectivity

On-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

75 °C (167 °F)

10 A

30 m

-30 °C (-22 °F)

Solder/Quick Connect

3 m

240 V

125 V

AC

7012OC

TE Connectivity

On-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; FM; UL

10A@240VAC

2 Form C

4.52 in (114.8 mm)

65.3 in (1658.62 mm)

114.8 X 65.3 X 71.9

2.831 in (71.9 mm)

75 °C (167 °F)

10 A

15 s

-30 °C (-22 °F)

Solder/Quick Connect

1.5 s

240 V

24 V

AC

SSFR90O

TE Connectivity

Multi-Delay Relay

Panel Mount

Momentary

DPDT-CO

DC

CE; CSA; UL

10A@120VAC

2 Form C

500000 Cycle(s)

2 W

2.677 in (68 mm)

56 in (1422.4 mm)

56 X 68 X 97

3.819 in (97 mm)

10A@28VDC

65 °C (149 °F)

10 A

3 s

-30 °C (-22 °F)

10 A

Solder/Quick Connect

100 ms

28 V

Other Timing Ranges also available

120 V

24 V

AC/DC

1-1617810-7

TE Connectivity

On-Delay Relay

Panel Mount

DPDT-CO

DC

2 Form C

25.79 X 25.79 X 25.4

125 °C (257 °F)

-55 °C (-67 °F)

Solder/Quick Connect

Silver Cadmium Oxide

28 V

9-1423159-0

TE Connectivity

On-Delay Relay

Panel Mount

DPDT-CO

DC

2 Form C

Solder/Quick Connect

125 V

5-1437456-4

TE Connectivity

Off-Delay Relay

Panel Mount

DPDT-CO

DC

2 Form C

114.8 X 82.55 X 78.48

75 °C (167 °F)

-30 °C (-22 °F)

Solder/Quick Connect

24 V

1472973-7

TE Connectivity

On-Delay Relay

Panel Mount

DPDT-CO

DC

2 Form C

Solder/Quick Connect

48 V

3-1472969-8

TE Connectivity

Off-Delay Relay

Panel Mount

DPDT-CO

DC

2 Form C

114.8 X 82.55 X 78.48

75 °C (167 °F)

-30 °C (-22 °F)

Solder/Quick Connect

125 V

5-1472973-2

TE Connectivity

On-Delay Relay

Panel Mount

DPDT-CO

DC

2 Form C

Solder/Quick Connect

48 V

9-1423164-0

TE Connectivity

Off-Delay Relay

Panel Mount

DPDT-CO

DC

2 Form C

Solder/Quick Connect

125 V

Time Delay Relays

Time delay relays are electrical switches that are designed to introduce a time delay before opening or closing a circuit. These relays are used in various applications that require the introduction of a time delay, such as motor control, lighting control, and HVAC systems. Time delay relays are commonly used to prevent equipment damage, improve system efficiency, and increase safety.

There are two types of time delay relays: on-delay and off-delay relays. On-delay relays are designed to introduce a time delay before closing a circuit, while off-delay relays introduce a time delay before opening a circuit. On-delay relays are commonly used in applications where equipment needs to be turned on after a specified time delay, while off-delay relays are commonly used in applications where equipment needs to be turned off after a specified time delay.

Time delay relays can be electromechanical or solid-state devices. Electromechanical time delay relays use a mechanical timing mechanism to introduce the time delay, while solid-state time delay relays use electronic components such as capacitors and resistors to introduce the time delay. Solid-state time delay relays are more accurate and reliable than electromechanical time delay relays and are commonly used in applications that require precise timing.