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Home > Overload Relay > CT Connected 120A 250VAC 3A 3B High Power Three Phase Latching Relay With Long Electrical Life
CT Connected 120A 250VAC 3A 3B High Power Three Phase Latching Relay With Long Electrical Life
CT Connected 120A 250VAC 3A 3B High Power Three Phase Latching Relay With Long Electrical Life
CT Connected 120A 250VAC 3A 3B High Power Three Phase Latching Relay With Long Electrical Life
CT Connected 120A 250VAC 3A 3B High Power Three Phase Latching Relay With Long Electrical Life
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CT Connected 120A 250VAC 3A 3B High Power Three Phase Latching Relay With Long Electrical Life
CT Connected 120A 250VAC 3A 3B High Power Three Phase Latching Relay With Long Electrical Life
CT Connected 120A 250VAC 3A 3B High Power Three Phase Latching Relay With Long Electrical Life
CT Connected 120A 250VAC 3A 3B High Power Three Phase Latching Relay With Long Electrical Life

CT Connected 120A 250VAC 3A 3B High Power Three Phase Latching Relay With Long Electrical Life

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Product Description

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Basic Data
Dimension (mm) 38 × 30 × 16.5
Weight (g) ≈ 33g
Contact Arrangement 1A / 1B
Contact Material AgSnO2
Ambient Temperature -40 ~ +70℃
Ambient Humidity 45% ~ 90% RH
Vibration 10 ~ 55Hz, 1.5mm (DA)
Specification Data
Nominal Voltage 6 ~ 48VDC
Power Consumption Single Coil: 1.5W, Dual Coil: 3W
Max. Switching Voltage 250VAC
Max. Switching Current 90A
Max. Switching Power 22,500 VA
Contact Resistance < 2.0 mΩ
Insulation Resistance 1000MΩ (DC 500V)
Dielectric Creepage 10mm
Dielectric Strength (Across Open Contact) ≥ 2000VAC 1min
Dielectric Strength (Coil To Contact) ≥ 4000VAC 1min
Electrical Life ≥ 10,000 cycles
Mechanical Life ≥ 100,000 cycles
Picking-up & Release Time ≤ 20ms
Pulse Duration ≥ 100ms
Functional Shock Resistance 10G
Destructive Shock Resistance 100G
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Caution of Latching Relay

  • 1. Suggestions of relay's input
    • Polarity: Please check the polarity inside of the technical specification. If single coil, "+ -" or "- +" are fine; you can change it by one pulse. If double coil, it is necessary to confirm "- + -" or "+ - +" before leaving the factory.
    • Driving: Please energize the relay at the recommended pulse width and rated voltage for reliable performance. If using driving conditions of 1.5 times, 2 times, or lower than the rated values, please confirm with the engineering support.
    • Resetting Status: Relays' contact status may be changed during transportation or installation due to impact of external force; therefore, please reset to the required status.
  • 2. Suggestions of relay's output
    • Hard Connections: When choosing the relay with hard connection, please avoid applying external force on load terminals during or after the installation.
    • Screw and Bolt Mounting: When the relay is connected with screw or bolts to the relays' terminals, please make sure the connection is fastened securely to prevent relay from damages or other safety problems due to temperature rise.
    • Signal Wires Protection: The sampling signal wires of the products are limited; please do not pull or torque them during installation.

Frequently Asked Questions (FAQ)

What are the physical dimensions and weight of this latching relay?
The dimensions of the relay are 38 × 30 × 16.5 mm, and it weighs approximately 33 grams.
What is the maximum switching capability for this device?
It has a maximum switching voltage of 250VAC, a maximum switching current of 90A, and a maximum switching power of 22,500 VA.
How does polarity function on single versus double coil versions?
For single coil systems, "+ -" or "- +" polarities can be reversed by a single pulse. For double coil systems, confirm the "- + -" or "+ - +" configuration before dispatch from the factory.
Why should I reset the contact status prior to installation?
The contact positions of the relay can inadvertently shift due to vibrations and external impacts during transport or installation. Resetting ensures it is in the designated default state before operation.
What is the recommended range for environmental operating conditions?
The relay functions at an ambient temperature range of -40℃ to +70℃ and within an ambient humidity range of 45% to 90% RH.
What is the estimated electrical and mechanical life of the relay?
The electrical life is rated at more than 10,000 cycles, and the mechanical life is rated at more than 100,000 cycles.

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