| Position #1: MODEL | 
| S = SW Series Air Cooled Rectifier | 
| U = UT Series Air Cooled Rectifier | 
| Position #2: TYPE | 
| S = Standard Rectifier (Manual taps) | 
| V = Variac Control | 
| Position #3: COOLING | 
| A = Air Cooled | 
| Position #4: STACK TYPE | 
| I = Silicon (recommended) | 
| E = Selenium | 
| Position #5: DC VOLTS | 
| List Maximum DC Voltage Desired | 
| Position #6: DC AMPS | 
| List Maximum DC Amperage Desired | 
| Position #7: AC INPUT | 
| AA = 115/230, 1 phase set for 115 vac | AB = 115/230, 1 phase set for 230 vac | 
| BA = 230/460, 1 phase set for 230 vac | BB = 230/460, 1 phase set for 460 vac | 
| EA = 115/460, 1 phase set for 115 vac | EB = 115/460, 1 phase set for 460 vac | 
| G = 115, 1 phase only | H = 230, 1 phase only | 
| F = Specify | 
| Position #8: SPECIAL FEATURES | 
| C = AC and DC arrestors | G = Communications filter | 
| D = DC arrestor | M = DC breaker or fuse | 
| E = AC arrestor | P = 4 Coarse and 6 Fine taps (Only) | 
| F = Filter choke | Z = Special features, (formally "Q = to be specified") | 
| Home | 
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| UT & SW Series | 
| UT & SW Otpional Features | 
| UT & SW Dimensions |