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| PartNumber | SL1021B420R | SL1021B420RG | SL1021B420RF |
| Description | Gas Discharge Tubes - GDTs / Gas Plasma Arrestors 3T B420V Beta 3 Terminal | GDT 420V 20KA T/H FAIL SHORT | Gas Discharge Tubes / Gas Plasma Arrestors 3T B420V Beta 3 Terminal |
| Manufacturer | Littelfuse | Littelfuse Inc. | - |
| Product Category | Gas Discharge Tubes - GDTs / Gas Plasma Arrestors | Gas Discharge Tube Arresters (GDT) | - |
| RoHS | Y | - | - |
| Series | SL1021A | - | |
| Peak Pulse Current | 20 kA | - | - |
| DC Sparkover | 420 V | - | - |
| Number of Electrodes | 3 Electrode | - | - |
| Termination Style | Radial | - | - |
| Failsafe Protection Y/N | Failsafe Not Protected | - | - |
| Diameter | 8 mm | - | - |
| Length | 10.5 mm | - | - |
| Minimum Operating Temperature | - 40 C | - | - |
| Maximum Operating Temperature | + 90 C | - | - |
| Packaging | Tray | Tray | - |
| Technology | Gas Discharge Tube | - | - |
| Type | 3 Pole Gas Discharge Tube | - | - |
| Brand | Littelfuse | - | - |
| Mounting Style | Through Hole | - | - |
| Insulation Resistance | 10 GOhms | - | - |
| Product Type | GDTs - Gas Discharge Tubes / Surge Arresters | - | - |
| Factory Pack Quantity | 500 | - | - |
| Subcategory | GDTs - Gas Discharge Tubes | - | - |
| Number of Poles | - | 3 | - |
| Package Case | - | Axial Cylinder, 3 Lead (Radial Bend) | - |
| Mounting Type | - | Through Hole | - |
| Tolerance | - | - | - |
| Voltage DC Spark Over Nom | - | 420V | - |
| Impulse Discharge Current 8 20μs | - | 20000A (20kA) | - |
| Fail Short | - | Yes | - |