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Relay timers (KETR, KEMR, KESR)

Relay timers, also known as time delay relays, timing relays, or timer relays, are essential components in industrial automation and control systems. These devices are designed to control the timing of electrical circuits, providing precise delays for switching operations. Common types include on-delay, off-delay, interval, and star-delta timers...

Relay timers, also known as time delay relays, timing relays, or timer relays, are essential components in industrial automation and control systems. These devices are designed to control the timing of electrical circuits, providing precise delays for switching operations. Common types include on-delay, off-delay, interval, and star-delta timers. They are available in various configurations, such as multifunction timers, single-function timers, and programmable timers, with adjustable time ranges from milliseconds to hours. Key technical specifications include supply voltages (e.g., 24V DC, 110V AC, 230V AC), contact configurations (e.g., 1CO, 2CO), and mounting types (e.g., DIN rail, panel mount). Relay timers are often integrated with contactors, motor starters, and PLCs to enhance system functionality.

Relay timers are widely used in industrial automation, building management, and process control applications. They are commonly installed in control panels, distribution boards, and motor control centers (MCCs). Typical sectors include manufacturing, water treatment, HVAC, energy management, and transportation. In automation systems, they control sequence operations, delay motor starts, manage lighting schedules, and protect equipment from short cycling. They are also critical in safety circuits, where precise timing ensures safe machine operation and emergency shutdown sequences.

Our inventory includes a comprehensive range of relay timers from leading manufacturers. Subcategories include multifunction timers (e.g., KETR series), single-function timers (e.g., KEMR series), and star-delta timers (e.g., KESR series). Key article codes often follow a pattern like KETR-1CO-24V, where 'KETR' denotes the series, '1CO' indicates the contact configuration, and '24V' specifies the supply voltage. Other common codes include KEMR-2CO-230V and KESR-1CO-400V. These timers are available with adjustable time ranges, LED status indicators, and screw or spring clamp terminals.

Partnering with Electric Automation Network ensures access to genuine relay timers with real-time pricing and up to 65% discount off list prices. Our engineering team provides personalized technical support to help you select the correct timer for your application, including guidance on time range, voltage, and contact configuration. We offer express worldwide shipping, with most orders dispatched within 24 hours. Detailed technical documentation, including wiring diagrams and datasheets, is available for every article. Trust us for reliable, cost-effective timing solutions for your industrial automation needs.

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Manufacturer Code Reference Catalog Number Description Delivery Price

095853

CS-TE

XTTRXBASE

Adapter cabinets CS

Adapter for ETR4, EMT6

Screw adapter

3 View Availability View Price

171858

ESR5-NV3-300

Y7-171858

Safety relays for emergency stop/protective door/light curtain monitoring, 24VDC, off-delayed, 0-300 sec.

ESR5-NV3-300

Eaton ESR5 Safety relays for emergency stop/protective door/light curtain monitoring, 24VDC, off-delayed, 0-300 sec.

2 View Availability View Price

221794

EMR4-PH45

-

Lid Resealable; B=45mm; For EMR4

3 View Availability View Price

153442

EMR5-R250-1-A

EMR5-R250-1-A

The relay Control Isolation; 1W; 250 V AC

Relay monitoring of insulation; 1 W; 250 V AC

3 View Availability View Price

153444

EMR5-R400-2-A

EMR5-R400-2-A

Insulation monitoring relay, 2W, 400VAC/ 600VDC

Insulation monitoring relay; 2 W; 400 V AC/ 600 V DC

3 View Availability View Price

153445

EMR5-RC690

EMR5-RC690

Insulation monitoring relay, AC/DC coupling module

Insulation monitoring relay; AC/DC coupling module

3 View Availability View Price

180413

ESR5-BWS-31-24VAC-DC

Y7-180413

Safety relays for controlled stop/protective door/light curtain monitoring, 24 V DC/AC, 3 enabling paths

ESR5-BWS-31-24VAC-DC

Eaton ESR5 Safety relays for controlled stop/protective door/light curtain monitoring, 24 V DC/AC, 3 enabling paths

3 View Availability View Price

031882

ETR4-11-A

Y7-31882

Timing relay, 1W, 0.05s-100h, 24-240V50/60Hz, 24-240VDC, on-delayed

Timer relay 1 W 0.05 s-100 h 24-240 V 50/60 Hz 24-240 V DC

Eaton Moeller® series ETR4 Timing relay, 1W, 0.05s-100h, 24-240V50/60Hz, 24-240VDC, on-delayed

2 View Availability View Price

031883

ETR4-11-W

Y7-31883

Timing relay, 1W, 0.05s-60h, on-delayed, 400VAC

Timer relay 1 W 0.05 s-60h Connection delay 400 V AC

Eaton Moeller® series ETR4 Timing relay, 1W, 0.05s-60h, on-delayed, 400VAC

2 View Availability View Price

031884

ETR4-51-A

Y7-31884

Timing relay, star-delta, 50 ms, 1W, 3-60s, 24-240VAC/DC

Star-Triangle Timer Relay 50 ms 1 W 3-60 s 24-240 V AC/DC

Timing relay, star-delta, 50 ms, 1W, 3-60s, 24-240VAC/DC

2 View Availability View Price

031885

ETR4-51-W

Y7-31885

Timing relay, star-delta, 50 ms, 1W, 3-60s, 400VAC

Timer relay. Star-Triangle. 50 ms. 1 W. 3-60 s. 400 V AC

Eaton Moeller® series ETR4 Timing relay, star-delta, 50 ms, 1W, 3-60s, 400VAC

2 View Availability View Price

031887

ETR4-69-W

Y7-31887

Timing relay, 1W, 0.05s-100h, multi-function, 400VAC

Timer Relay 1 W 0.05 s-100 h Multi-Function 400 V AC

Eaton Moeller® series ETR4 Timing relay, 1W, 0.05s-100h, multi-function, 400VAC

2 View Availability View Price

031888

ETR4-70-A

Y7-31888

Timing relay, 2W, 0.05s-100h, multi-function, 24-240VAC/DC, potentiometer connection

Timer Relay 2 W 0.05 s-100 h Multi-Function 24-240 V AC/DC

Eaton Moeller® series ETR4 Timing relay, 2W, 0.05s-100h, multi-function, 24-240VAC/DC, potentiometer connection

2 View Availability View Price

031891

ETR4-69-A

Y7-31891

Timing relay, 1W, 0.05s-100h, multi-function, 24-240VAC/DC

Timer Relay 1 W 0.05 s-100 h Multi-Function 24-240 V AC/DC

Eaton Moeller® series ETR4 Timing relay, 1W, 0.05s-100h, multi-function, 24-240VAC/DC

2 View Availability View Price

221784

EMR4-F500-2

EMR4-F500-2

Phase sequence relay, 3p, 2W, 200-500VAC

Phase sequence relay; 3 poles; 2 W; 200-500 V AC

3 View Availability View Price

221789

EMR4-N100-1-B

EMR4-N100-1-B

Liquid level monitoring relay, 1W, 220-240V50/60Hz, 5-100kOhm

Fluid level monitoring relay; 1 W; 220-240 V 50/60 Hz; 5-100 kOhm

3 View Availability View Price

221790

EMR4-N500-2-B

EMR4-N500-2-B

Liquid level monitoring relay, 2W, 220-240V50/60Hz, 250-500Ohm

Fluid level monitoring relay; 2 W; 220-240 V 50/60 Hz; 250-500 Ohm

3 View Availability View Price

221791

EMR4-N500-2-A

EMR4-N500-2-A

Liquid level monitoring relay, 2W, 24-240VAC/DC, 250-500Ohm

Fluid level monitoring relay; 2 W; 24-240 V AC/DC; 250-500 Ohm

3 View Availability View Price

221795

EMR4-PH22

EMR4-PH22

Sealable shroud, B=22.5mm, for EMR4

Sealable cover; B=22.5mm; For EMR4

3 View Availability View Price

262684

ETR2-11

Y7-262684

Timing relay, 1W, 0.05s-100h, 24-240VAV 50/60Hz, 24-48VDC, on-delayed

ETR2-11

Eaton Moeller® series ETR2 Timing relay, 1W, 0.05s-100h, 24-240VAV 50/60Hz, 24-48VDC, on-delayed

2 View Availability View Price

262686

ETR2-12

Y7-262686

Timing relay, 0.05s-100h, 24-240VAC 50/60Hz, 24-48VDC, 1W, off-delayed

ETR2-12

Eaton Moeller® series ETR2 Timing relay, 0.05s-100h, 24-240VAC 50/60Hz, 24-48VDC, 1W, off-delayed

2 View Availability View Price

262687

ETR2-21

Y7-262687

Timing relay, 0.05s-100h, 24-240VAC 50/60Hz, 24-48VDC, 1W, fleeting contact on energization

ETR2-21

Eaton Moeller® series ETR2 Timing relay, 0.05s-100h, 24-240VAC 50/60Hz, 24-48VDC, 1W, fleeting contact on energization

2 View Availability View Price

262688

ETR2-42

Y7-262688

Timing relay, 0.05s-100h, 24-240VAC 50/60Hz, 24-48VDC, 1W, flashing

ETR2-42

Eaton Moeller® series ETR2 Timing relay, 0.05s-100h, 24-240VAC 50/60Hz, 24-48VDC, 1W, flashing

2 View Availability View Price

262689

ETR2-69

Y7-262689

Timing relay, 1W, 0.05s-100h, multi-function, 24-240VAC 50/60Hz, 24-48VDC

ETR2-69

Eaton Moeller® series ETR2 Timing relay, 1W, 0.05s-100h, multi-function, 24-240VAC 50/60Hz, 24-48VDC

2 View Availability View Price

262730

ETR2-44

Y7-262730

Timing relay, 0.05s-100h, 24-240VAC 50/60Hz, 24-48VDC, 1W, flashing, 2 times

ETR2-44

Eaton Moeller® series ETR2 Timing relay, 0.05s-100h, 24-240VAC 50/60Hz, 24-48VDC, 1W, flashing, 2 times

2 View Availability View Price

106942

EMR4-I1-1-A

-

Current monitoring relay, 2W, 3-30mA, 10-100mA, 0.1-1A, 24-240VAC/DC

Relay monitoring intensity; 2 W; 3-30mA; 10-100mA; 0.1-1A; 24-240 V AC/DC

3 View Availability View Price

106943

EMR4-I15-1-A

-

Current monitoring relay, 2 W, 0,3 - 1,5 A, 1 -5 A, 3 - 15 A

Relay monitoring intensity; 2 W; 0; 3-1; 5 A; 1-5 A; 3-15 A

Current monitoring relay, I/I= 0.3 - 1.5 A, 1 - 5 A, 3 - 15 A, 24 - 240 V AC, 50/60 Hz, 24 - 240 V DC

3 View Availability View Price

106944

EMR4-I15-1-B

EMR4-I15-1-B

Current monitoring relay, 2 W, 0,3 - 1,5 A, 1 -5 A, 3 - 15 A

Intensity monitoring relay; 2 W; 0; 3-1; 5 A; 1-5 A; 3-15 A

3 View Availability View Price

118700

ESR5-NO-21-24VAC-DC

Y7-118700

Safety relay emergency stop/protective door, 24VDC/AC, 2 enabling paths

ESR5-NO-21-24VAC-DC

Eaton ESR5 Safety relay emergency stop/protective door, 24VDC/AC, 2 enabling paths

3 View Availability View Price

118702

ESR5-NO-31-24VAC-DC

Y7-118702

Safety relay emergency stop/protective door, 24VDC/AC, 3 enabling paths

ESR5-NO-31-24VAC-DC

Safety relay emergency stop/protective door, 24VDC/AC, 3 enabling paths

3 View Availability View Price

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