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| Part Number | S-4 | S-3 | S-2 | S-1 | SEIFCX-8 |
| Manufacturer | Curtis Industries | Curtis Industries | Curtis Industries | Curtis Industries | Curtis Industries |
| Series | S | S | S | S | SEI |
| Packaging | Bulk | Bulk | Bulk | Bulk | Bulk |
| Product Status | Active | Active | Active | Active | Obsolete |
| Terminal Block Type | Barrier Block | Barrier Block | Barrier Block | Barrier Block | Barrier Block |
| Number of Circuits | 4 | 3 | 2 | 1 | 8 |
| Number of Wire Entries | 8 | 6 | 4 | 2 | 8 |
| Pitch | 2.420" (61.47mm) | 2.420" (61.47mm) | 2.420" (61.47mm) | - | 0.250" (6.35mm) |
| Number of Rows | 2 | 2 | 2 | 2 | 1 |
| Current Rating (Amps) | 225A | 225A | 225A | 225A | 5A |
| Voltage Rating | 600V | 600V | 600V | 600V | - |
| Wire Gauge | 4/0 AWG | 4/0 AWG | 4/0 AWG | 4/0 AWG | 16-22 AWG |
| Top Termination | Screws | Screws | Screws | Screws | Screws with Captive Plate |
| Bottom Termination | Closed | Closed | Closed | Closed | Solder Turret, Insulated |
| Barrier Type | 2 Wall (Dual) | 2 Wall (Dual) | 2 Wall (Dual) | 2 Wall (Dual) | 2 Wall (Dual) |
| Features | Flange | Flange | Flange | Flange | Flange |
| Color | - | - | - | - | - |
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