Three phase, 25 or 35 amps per leg, din rail contactor

Features

  • Maximum Surge Survival™ technology -- triple layer, voltage surge protection
  • Green LED for input status
  • Thermally optimized heat sink permits edge-to-edge installations on a din rail
  • Built-in snubber circuit
  • Zero crossing activation -- low EMI, low noise to nearby electronics
  • Internal 50A SCR thyristors for high inrush capability
  • 4000 volt isolation, 1400Vpk blocking voltage
 
  • 1000 volt / microsecond immunity
  • Highest thermal efficiency -- less than 1.2 watts per amp switched, per leg
  • CE, UL recognized, CSA
  • Industry standard A1, A2, L1, T1, L2, T2, L3, T3 terminal numbers
  • High density design permits more amps per square inch
  • 3Ø = 25 amps per leg, 2Ø using L1/T1 and L3/T3 = 35 amps per leg.
  • Optional: 3 internal MOVs for a fourth layer of surge survival
DDA3 solid state contactor
DDA temperature curver

Part Numbers

DDA3-6V75T-H   up to 75 amps TOTAL; 25A on three legs or 35A on 2 legs; 660V max, 10-60 VDC activated Buy

DDA3-5V75T-H   up to 75 amps TOTAL; 25A on three legs or 35A on 2 legs; 570V max, three internal MOVs, 10-60 VDC activated Buy

DAA3-6V75T-H   up to 75 amps TOTAL; 25A on three legs or 35A on 2 legs; 660V max, 100-280 VAC activated Buy

DAA3-5V75T-H   up to 75 amps TOTAL; 25A on three legs or 35A on 2 legs; 570V max, three internal MOVs, 100-280 VAC activated Buy


  
DDA size
DDA size


Specifications

Part Number Line Voltage Range (VAC) Load Current Range (A RMS) Min Control Voltage & Current Draw Max Control Voltage & Current Draw Must Release Voltage
 
DC activated
DDA3-6V75T-H 24-660 .10-25 (3 leg) or 35 (2 leg) 10VDC/3.5mA 60VDC/6mA 1 VDC
DDA3-5V75T-H 24-660 .10-25 (3 leg) or 35 (2 leg) 10VDC/3.5mA 60VDC/6mA 1 VDC
 
AC activated*
DAA3-6V75T-H 24-660 .10-25 (3 leg) or 35 (2 leg) 100VAC/25mA 280VAC/25mA 20VDC/2MA
DAA3-5V75T-H 24-660 .10-25 (3 leg) or 35 (2 leg) 100VAC/25mA 280VAC/25mA 20VDC/2MA
* Typically, does NOT need a burden resistor when activated by a triac output controller.
 
Internal MOVs The 5V models use three internal MOVs that are similar to the Littelfuse Harris V575 LA80B Metal Oxide Varistors. The use of MOVs is encouraged in situations where there are frequent voltage surges such as near motor starter applications.
Installation The DDA3 can be installed on a din rail or directly on a metal panel. The heat sink must be installed so the air flows up and through the fins.
Off-State dv/dt 1000 v/µs
Isolation 4000 volts isolation
I²T fuse 50A or less, for example: Bussman FWP50A14F, FWC32A10F, FWC20A10F. Ferraz Shawmut B093910, M330015, K330013
Turn-on time <8.3 ms at 60hz
Turn-off time <8.3 ms at 60hz
Power terminals Will accept #24-#10 AWG wire. Torque: 7-9 inch lbs.
Control terminals Will accept #24-#14 AWG wire. Torque: 4 inch lbs.
Terminology The word "leg" refers to a switched AC power line. A three phase application may use 3 switched lines or 2 switched lines.
Motor starter When used as a motor starter, use the "5V" feature in order to include the internal MOVs. The Power-io contactor can be typically be used for: <10 FLA amps per phase, 3 HP for most 208/230 volt motors, 7.5 HP for most 460 volt motors.

Additional information

Close up photo of: three, din rail solid state contactors and their labels

Wiring examples of various 3 phase loads: 3 phase contactor wiring