F R three phase SSR

F / R Three Phase Solid State Relay


Product Specification


Salient Features:

  • Panel mounted S.S.R.
  • Input-Output opto Isolation 2500 Vrms
  • True zero Cross over/ Random type
  • Virtually free from EMI / RFI
  • Input LED indicator ; Forward and Reverse
  • Input TTL compatibility
  • Noise less without chattering and fast switchaing
  • Output to body 4kV~ isolation
  • Transient voltage suppressors in built


  • The Forward Revers 3ph having negative (-Ve) common & positive(+ve) switching
  • Heat Sink + Din Rail Mounting If both input signal given Simultaneously then output of SSR will OFF/Motor OFF.(Interlocking)
  • Inbuilt snubber
  • Arcless Switching
  • Input Reverse polarity protection
  • Output N/O configuration


  • Hoist-Crane Motor Forward Reverse
  • CNC - NC Machine
  • Tensile Machine
  • Any type of Motor Fast Forward - Reverse

Technical Data

Output circuit - Switching element   BACK TO BACK SCR
Operational voltage range Vrms 24-480VAC
Peak inverse voltage Vpk 1200Vpk
Rated operational current IT 25A 50A 75A
Frequency range Hz 45-65Hz
Max. off-state leakage current mA <5 mArms
Minimum load current holding current IHO 175 mA 275 mA 275 mA
Rated peak withstand current (t =10 ms) ITSM 320A 800A 1200A
Max. Zero voltage turn on Vpk 15 15 15
Max. load integral i²dt (t = 10 ms) I²t 500A²S 3000A²S 7200A²S
Voltage drop in on-state VTM 1.3V 1.3V 1.3V
Critical current gradient di/dt ≥100 A/µs ≥100 A/µs ≥150 A/µs
Critical voltage gradient Dv/dt 350 V/µs 1500 V/µs 1500 V/µs
Thermal resistance Rth (Junction to case) DC ØJC 1.1 1.0 0.4
Power factor CosØ ≥0.5 (at 600VAC)
Maximum barrier-layer temperature 125°C
Input circuit-control circuit /rated control supply volt 9-32VDC/
Make voltage / Break voltage 9VDC
Max. current consumption 22mA
Switching times max zero cross over make/break 1period/1period
Ambient temperature range operation -30 to +80°C
Test voltage between all isolated circuits (type test) 4kVA