Slim socket and relay selection
USS sockets provide the wiring interface for URS relays with one changeover contact. Screw and push-in versions are available in five socket voltage groups. Select the socket input voltage and the matching relay separately: the higher-voltage socket inputs do not indicate the voltage applied directly to the relay coil.
| Nominal socket input | Screw socket | Push-in socket | Matching relay |
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| 5VDC | USS-1E-5 | USS-1P-5 | URS105D |
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| 12VDC | USS-1E-5 | USS-1P-5 | URS112D |
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| 24VDC | USS-1E-5 | USS-1P-5 | URS124D |
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| 24VAC/DC | USS-1E-1 | USS-1P-1 | URS124D |
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| 48VAC/DC | USS-1E-2 | USS-1P-2 | URS148D |
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| 60VAC/DC | USS-1E-2 | USS-1P-2 | URS160D |
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| 120VAC/DC | USS-1E-3 | USS-1P-3 | URS160D |
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| 230VAC/DC | USS-1E-4 | USS-1P-4 | URS160D |
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The DC-only -5 sockets require the relay for the selected nominal input voltage. The AC/DC versions include the input-circuit arrangement for the specified voltage group. The gallery shows representative screw and push-in structures; use the exact model code to select the electrical version.
Connection and dimensions
| Characteristic | USS-1E screw models | USS-1P push-in models |
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| Relay configuration | 1 changeover contact (1CO) | 1 changeover contact (1CO) |
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| Height × width × depth | 76.6mm × 6.2mm × 88.2mm | 80.6mm × 6.2mm × 101.5mm |
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| Stranded flexible conductor | 0.5-1.5mm² | 0.5-1.5mm² |
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| Wire size | 20-16AWG | 20-16AWG |
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| Screw tightening torque | 0.5N·m | Not applicable |
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| Strip length | 7mm | 7mm |
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Electrical limits and insulation
| Characteristic | All listed sockets |
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| Maximum contact-circuit voltage | 250V |
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| Maximum contact-circuit current | 6A |
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| Dielectric withstand between contacts | 2500VAC for 1 minute |
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| Dielectric withstand between coil and contact circuits | 4000VAC for 1 minute |
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The fitted relay must also meet the circuit load and switching requirements. The socket limits are independent of the selected control input voltage.
Operating environment
| Condition | All models |
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| Operating temperature | -40°C to +60°C |
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| Storage temperature | -40°C to +85°C |
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| Ambient humidity | 35-80%RH |
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