Direct Water Cooled


Undoubtedly the most popular resistance welding contactors for the past thirty years are Darrah's Direct Water Cooled SCR Contactors. The selections shown are available in welding current ratings to 6526 Amps RMS at 50% duty cycle, 5144 Amps continuous. Choose between single or double sided cooled, and in SCR voltages to 4200 Volts. This product line is the workhorse in medium to heavy KVA welding controllers. Mounting bases and bus bar connections are similar throughout the series, therefore offering flexibility and conformity from 15 KVA through 1500 KVA designs.

Direct Water Cooled
Darrah Part Number Welding Rating Amps RMS at 50% Duty Cycle Welding Rating Amps RMS at 100% Duty Cycle SCR voltage rating (PIV) (VRRM) Water Cooled SGL DBL
D09ST15J
D09ST18J
900
900
400
400
1500
1800
X
X
-
-
D13DT15J
D13DT18J
1300
1300
695
695
1500
1800
-
-
X
X
D13SE18J
D13SE20J
1300
1300
695
695
1800
2000
X
X
-
-
D18DE18J
D18DE20J
1800
1800
970
970
1800
2000
-
-
X
X
D21DM18J
D21DM20J
D21DM26J
2100
2100
2100
1225
1225
1225
1800
2000
2600
-
-
-
X
X
X
D26DN18J
D26DN20
2600
2600
1710
1710
1800
2000
-
-
X
X
D32DN18J
D32DN20J
D32DN26J
3200
3200
3200
2075
2075
2075
1800
2000
2100
-
-
-
X
X
X
D40DD18J
D40DD26J
3996
2230
2188
1946
1800
2600
-
-
X
X
DPH7847-470J 6526 5144 2200 - X

Water Requirements Amps RMS is achieved with a cooling flow rate of 1.2 gallons (4.5 liters) per minute at 40°C water temperature. The DPH7847-470J requires 1.8 gallons per minute.
Water Connections All models accept 3/8 inch water connections. The DPH7847-470J accepts ½ inch water connection.
Thermostat Normally Closed, Opens at 50º C, Supplied as Standard, S15027.
MOV For MOV add suffix M to part number.
Example 13DT15JM, 1300 Amps RMS, 1500 Volt, with thermostat and MOV.

Goes into the Shopping Cart