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HS-6 Design
Darrah HS 6 Design SCR Contactors have proven to be dependable for years in resistance welding controllers. Choose between two popular current ratings with SCR voltages to 1800 Volts. Darrah's HS-6 design switches are available with either 3/8 " or 1/2" water hose connections. As always, MOV's and R/C snubbers are easily added.
| Darrah Part Number |
Welding Rating Amps RMS at 50% Duty Cycle |
Welding Rating Amps RMS at 100% Duty Cycle |
SGL. Cycle Surge Current (ITSM) |
SCR Voltage Rating (PIV) (VRRM) |
| DO8HS6-16J |
1200 |
800 |
5500 |
1600 |
| D12HS6-18J |
1800 |
1200 |
7500 |
1800 |
| Water Requirements |
Amps RMS is achieved with a cooling flow rate of 1.2 gallons (4.5 liters) per minute at 40ºC water temperature. |
| Water Connection |
For 3/8 inch add suffix A to part number. For 1/2 inch add suffix B to part number. |
| Cooling Block |
Copper-Nickel Plated. |
| Thermostat |
Normally Closed, Opens at 50ºC, Supplied as Standard, S15027. |
| MOV |
For MOV add suffix M to part number. |
| Terminal Board |
For SCR gate cathode leads add suffix T to part number. |
| Example |
D08HS6-16AJ, 1200 Amps RMS, 1600 Volts, with 3/8 inch water connection and thermostat. |
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