| PartNumber | A1220UA4LRP | A1220UA4LTP | A1220UA4RP |
| Description | Thyristor Surge Protection Devices (TSPD) 4Chp 100/180V 50A | Thyristor Surge Protection Devices (TSPD) 4Chp 100/180V 50A | Thyristor Surge Protection Devices (TSPD) 4Chp 100/180V 45A |
| Manufacturer | Littelfuse | Littelfuse | Littelfuse |
| Product Category | Thyristor Surge Protection Devices (TSPD) | Thyristor Surge Protection Devices (TSPD) | Thyristor Surge Protection Devices (TSPD) |
| RoHS | Y | Y | N |
| Breakover Voltage VBO | 130 V, 230 V | 130 V, 230 V | 130 V, 230 V |
| Breakover Current IBO Max | 800 mA | 800 mA | 800 mA |
| Non Repetitive On State Current | 20 A | 20 A | 20 A |
| Rated Repetitive Off State Voltage VDRM | 100 V, 180 V | 100 V, 180 V | 100 V, 180 V |
| Off State Leakage Current @ VDRM IDRM | 5 uA | 5 uA | 5 uA |
| Holding Current Ih Max | 120 mA | 120 mA | 120 mA |
| On State Voltage | 4 V | 4 V | 4 V |
| Off State Capacitance CO | 20 pF, 25 pF, 30 pF | 20 pF, 25 pF, 30 pF | 20 pF, 25 pF, 30 pF |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | Modified-MS-013-6 | Modified-MS-013-6 | Modified-MS-013-6 |
| Packaging | Reel | Tube | Reel |
| Current Rating | 2.2 A | 2.2 A | 2.2 A |
| Series | Axxxxu_4 | Axxxxu_4 | Axxxxu_4 |
| Brand | Littelfuse | Littelfuse | Littelfuse |
| Product Type | TSPDs | TSPDs | TSPDs |
| Factory Pack Quantity | 1500 | 500 | 1500 |
| Subcategory | Thyristors | Thyristors | Thyristors |
| Tradename | SIDACtor | SIDACtor | SIDACtor |