Solid State Ignitron Tube Replacements


Darrah provides a complete line of Solid State SCR Ignitron Tube Replacements for Ignitron sizes A through Super E. Replacements are available in both water cooled and air cooled designs, and easily mount on existing Ignitron Tube brackets. Darrah’s single assembly replaces two tubes.

Solid state replacements are more efficient and less costly than ignitron tubes, and contain no mercury.

Darrah's replacements are engineered so that no modifications are required to existing controls or timer. Replacements are supplied with MOV, voltage suppressor and normally closed thermostat.

Simple installation instructions are included. Thousands have been sold and installed.

Water cooled - DHE Series

Solid State Mechanical Contactor Replacements
Ignitron Size Darrah Part Number Welding Transformer Size Welding Rating Amps RMS at 50% duty cycle SCR Voltage Rating (PIV) (VRRM)
A/B
C
DHE800-22M
DHE1200-22M
100KVA
200KVA
1300
1700
2200
2200
J/C
D
DHE1500-22M
DHE1700-22M
300KVA
550KVA
1800
2300
2200
2200
D/E
E
DHE2500-22M
DHE3300-22M
650KVA
750KVA
2600
3200
2200
2200
Super E DHE7847-22M 1500KVA 6526 2200
2200

Water Cooled Welding Ratings: Transformer KVA is based on 50% duty cycle, 480 Volt incoming A.C. line.


Air Cooled -DAHE Series

Solid State Mechanical Contactor Replacements
Ignitron Size Darrah Part Number Welding Transformer Size Welding Rating Amps RMS at 5% duty cycle SCR Voltage Rating (PIV) (VRRM)
A/B DAHE180-22M 125KVA 1540 2200
C DAHE195-22M 250KVA 1810 2200
D/E DAHE055-22M 500KVA 2630 2200

Water Cooled Welding Ratings: Transformer KVA is based on 5% duty cycle, 480 Volt incoming A.C. line.
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