| 1278521 | OT127-609 | A.C. controlled thyristors stacks, single-phase | Mullard |
| 1278522 | OTH10-1008L | Bridge-connected thyristor stacks, single-phase | Mullard |
| 1278523 | OTH10-608L | Bridge-connected thyristor stacks, single-phase | Mullard |
| 1278524 | OTH105--609 | A.C. controlled thyristors stacks, single-phase | Mullard |
| 1278525 | OTH105-1209 | A.C. controlled thyristors stacks, single-phase | Mullard |
| 1278526 | OTH11-609L | A.C. controlled thyristors stacks, single-phase | Mullard |
| 1278527 | OTH115-1208 | Bridge-connected thyristor stacks, single-phase | Mullard |
| 1278528 | OTH115-608 | Bridge-connected thyristor stacks, single-phase | Mullard |
| 1278529 | OTH12-608L | Bridge-connected thyristor stacks, single-phase | Mullard |
| 1278530 | OTH1200 | Case shape and dimensions | mble |
| 1278531 | OTH1200-1000 | Ignistors | mble |
| 1278532 | OTH1200-1000 | Welding ignistors | Mullard |
| 1278533 | OTH1200-1200 | Ignistors | mble |
| 1278534 | OTH1200-1200 | Welding ignistors | Mullard |
| 1278535 | OTH1200-1400 | Ignistors | mble |
| 1278536 | OTH1200-1400 | Welding ignistors | Mullard |
| 1278537 | OTH1200-800 | Ignistors | mble |
| 1278538 | OTH1200-800 | Welding ignistors | Mullard |
| 1278539 | OTH127-1209 | A.C. controlled thyristors stacks, single-phase | Mullard |
|
| 1278540 | OTH16-608L | Bridge-connected thyristor stacks, single-phase | Mullard |
| 1278541 | OTH20-608L | Bridge-connected thyristor stacks, single-phase | Mullard |
| 1278542 | OTH22-1208A | Bridge-connected thyristor stacks, single-phase | Mullard |
| 1278543 | OTH22-1209 | A.C. controlled thyristors stacks, single-phase | Mullard |
| 1278544 | OTH22-609 | A.C. controlled thyristors stacks, single-phase | Mullard |
| 1278545 | OTH25-1205 | A.C. controlled thyristors stacks, single-phase | Mullard |
| 1278546 | OTH25-605 | A.C. controlled thyristors stacks, single-phase | Mullard |
| 1278547 | OTH28-1209 | A.C. controlled thyristors stacks, single-phase | Mullard |
| 1278548 | OTH28-608A | Bridge-connected thyristor stacks, single-phase | Mullard |
| 1278549 | OTH29-1208A | Bridge-connected thyristor stacks, single-phase | Mullard |
| 1278550 | OTH32-609 | A.C. controlled thyristors stacks, single-phase | Mullard |
| 1278551 | OTH36-1209 | A.C. controlled thyristors stacks, single-phase | Mullard |
| 1278552 | OTH40-608A | Bridge-connected thyristor stacks, single-phase | Mullard |
| 1278553 | OTH44-609 | A.C. controlled thyristors stacks, single-phase | Mullard |
| 1278554 | OTH50-608A | Bridge-connected thyristor stacks, single-phase | Mullard |
| 1278555 | OTH500 | Case shape and dimensions | mble |
| 1278556 | OTH500-1000 | Ignistors | mble |
| 1278557 | OTH500-1200 | Ignistors | mble |
| 1278558 | OTH500-1400 | Ignistors | mble |
| 1278559 | OTH500-800 | Ignistors | mble |
| 1278560 | OTH57-609 | A.C. controlled thyristors stacks, single-phase | Mullard |
