Technical Parameters

Contact Parameters

Parameter Value
Rated operational current (le) 400A
Rated operational voltage (Ue) 12-1000VDC
Minimum load 1A 12VDC
Main contact type 1SH (SPST NO DM)
Nominal resistance of main circuit MAX 30mV (@100A)
Main contact mounting M8 external thread
Connecting torque 10-12 N·m
Max. switching current 2500A 300VDC
Contact resistance <0.15Ω

Coil Parameters (12/24VDC)

Parameter Value
Rated voltage (Us) 12/24VDC
Operating voltage range 9-36 VDC
Pick up voltage 8-9 VDC
Release voltage 6-7 VDC
Coil power (holding) 3.2W
Inrush current 3.8A (0.1s) @12V
Holding current 0.267A@12V; 0.133A@24V
Pick up time ≤45ms
Release time ≤10ms
Bounce time ≤5ms

Model Variants

FXC7-400T-P

Basic model without auxiliary contacts

FXC7-400TH-P

With normally open auxiliary contacts

FXC7-400TC-P

With normally closed auxiliary contacts

Life Characteristics & Environmental Specifications

Parameter Value
Mechanical Life 300,000 cycles
Capacitive load life (RC=1ms) 600A 30,000 cycles
Dielectric withstand voltage AC 3000V
Insulation resistance ≥1000MΩ@1000VDC
Shock Stability test 196m/s² (20G)
Vibration resistance 10-2000Hz, 20G
Operating ambient temperature -40℃ to +85℃
Operating ambient humidity 5% to 85% RH
IP Grade IP67 (inner space)
Altitude ≤4000m
Weight 550g (555g with auxiliary)

Installation & Safety Notes

Important Installation Guidelines

  • For capacitive loads, always include pre-charge circuit to prevent transient currents
  • Maintain specified torque ranges: 10-12 N·m for contacts, 2.5-3.5 N·m for mounting holes
  • External conductor cross-section must be ≥120mm²
  • No polarity requirement for main contacts and control coil
  • Control coil wire length: 300±20mm

Application Fields

  • Electric Vehicles (EV) and charging systems
  • Quick Charging Stations
  • Photovoltaic Systems and Solar Farms
  • Energy Storage Systems
  • Industrial DC Power Distribution
  • Auxiliary contactor applications

Electrical Characteristics

Characteristic Specification
Nominal insulation voltage (UI) 1000V
Max. current (30VDC / 125VAC) 2A / 3A
Min. current 8VDC 100mA
Strength test 490m/s² (50G)