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| PartNumber | SG4208 | SG420 | SG420Q |
| Description | Inrush Current Limiters 2OHM 23AMP | Gas Discharge Tubes / Gas Plasma Arrestors 315-525V GDT T/R 2 Term | |
| Manufacturer | - | Littelfuse Inc. | Littelfuse Inc. |
| Product Category | - | Inrush Current Limiters (ICL) | Gas Discharge Tube Arresters (GDT) |
| Series | - | SURGE-GARD | SG |
| Type | - | NTC | Square GDT |
| Packaging | - | Digi-ReelR Alternate Packaging | Digi-ReelR Alternate Packaging |
| Mounting Style | - | SMD/SMT | SMD/SMT |
| Number of Poles | - | 2 | 2 |
| Current Rating | - | 23 A | - |
| Termination Style | - | SMD/SMT | SMD/SMT |
| Tradename | - | SURGE-GARD | - |
| Operating Temperature Range | - | 0 C to + 65 C | - 40 C to + 90 C |
| Length | - | 4.5 mm | 4.5 mm |
| Width | - | 0.3 in | - |
| Package Case | - | 1812 (4532 Metric) | 1812 (4532 Metric) |
| Mounting Type | - | Surface Mount | Surface Mount |
| Tolerance | - | ±25% | - |
| Lead Style | - | Straight | - |
| Lead Spacing | - | * | - |
| Approvals | - | CSA, UL | - |
| R 25°C | - | 2.0 Ohm | - |
| Current Steady State Max | - | 23A | - |
| R Current | - | 0.025 Ohm | - |
| Diameter | - | * | - |
| Voltage DC Spark Over Nom | - | 420V | 420V |
| Impulse Discharge Current 8 20μs | - | 1000A (1kA) | 1000A (1kA) |
| Fail Short | - | No | No |
| Resistance | - | 2 Ohms | - |
| Lead Diameter | - | 0.04 in | - |
| Peak Pulse Current | - | 1 kA | 1 kA |
| DC Sparkover | - | 420 VDC | 420 VDC |
| Number of Electrodes | - | 2 Electrode | 2 Electrode |
| Insulation Resistance | - | 1 GOhms | 1 GOhms |