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| Part Number | 503 SI/ 3 E | 503 SI/ 2 DS GW | 503 SI/ 1 DS GW | 503 SI/ 3 DS GW | 503 SI/ 4 DS GW |
| Manufacturer | Adels-Contact | Adels-Contact | Adels-Contact | Adels-Contact | Adels-Contact |
| Series | - | - | - | - | - |
| Packaging | Bulk | Bulk | Bulk | Bulk | Bulk |
| Product Status | Active | Active | Active | Active | Active |
| Terminal Block Type | Eurostyle Terminal Strip | Eurostyle Terminal Strip | Eurostyle Terminal Strip | Eurostyle Terminal Strip | Eurostyle Terminal Strip |
| Number of Circuits | 3 | 2 | 1 | 3 | 4 |
| Number of Wire Entries | 6 | 4 | 2 | 6 | 8 |
| Pitch | - | 0.394" (10.00mm) | - | 0.394" (10.00mm) | 0.394" (10.00mm) |
| Number of Rows | 2 | 2 | 2 | 2 | 2 |
| Current Rating (Amps) | - | 10A | 10A | 10A | 10A |
| Voltage Rating | 400V | 300V | 300V | 300V | 300V |
| Wire Gauge | - | 12-22 AWG | 12-22 AWG | 12-22 AWG | 12-22 AWG |
| Top Termination | Screws | Screws | Screws | Screws | Screws |
| Bottom Termination | Closed | Closed | Closed | Closed | Closed |
| Barrier Type | Enclosed | Enclosed | Enclosed | Enclosed | Enclosed |
| Features | Fuse Holder | Fuse | Fuse | Fuse | Fuse |
| Color | Gray | White | White | White | White |
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