Schneider SSP3A250B7 Solid State Overload Relays — now discontinued, supplied from remaining surplus and broker stock.
| Parameter | Value |
|---|---|
| Range of product | Harmony Solid State Relays |
| Solid state output type | Zero voltage switching |
| Product or component type | Solid state relay up to 50 A |
| Output voltage | 48...530 V AC |
| Maximum voltage drop | = 1000 MOhm at 500 V DC |
| Maximum switching voltage | 2 V AC turn-off |
| Minimum switching voltage | 18 V AC turn-on |
| Coil voltage | 18...36 V AC |
| Load current | 0.1...50 A |
| Input current | 15...20 mA |
| Surge current | 715 A 20 ms 750 A 16.6 ms 150 A 1 s |
| Line rated current | 50 A |
| Parameter | Value |
|---|---|
| Maximum leakage current | 3 mA off-state |
| Phases | 3 phase |
| IP degree of protection | IP20 |
| Mounting support | Panel |
| Connections - terminals | Screw terminals 1 x 0.2...1 x 2.5 mm², AWG 24...AWG 14) input Screw terminals 1 x 1.5...1 x 10 mm², AWG 16...AWG 8) output |
| Response time | 20 ms (turn-on) 30 ms (turn-off) |
| Pollution degree | 2 |
| Depth | 1.4 in (35.4 mm) |
| Width | 4.0 in (101.3 mm) |
| Height | 3.1 in (79.7 mm) |
| Standards | IEC 61000 IEC 60950-1 IEC 62314 |
| Marking | CE |
| Category | US10CP222375 |
| Test button | Without test button |
| LED indicator | LED, green input |
| Flame retardance | V0 conforming to UL 94 |
| Device short name | SSP |
| Tightening torque | 0.9...1.1 N.m for input 1.7...2.2 N.m for output |
| Thermal resistance | 0.12 °C/W |
| Device presentation | Complete product |
| Dielectric strength | 4 kV AC for input/output 4 kV AC for input or output to case |
| Maximum capacitance | 8 pF for input/output |
| Overvoltage category | III |
| Output switching mode | Zero voltage switching |
| Transient overvoltage | 1200 V |
| Maximum i2t for fusing | 2520 A².s for 10 ms at 50 Hz 2320 A².s for 8.3 ms at 60 Hz |
| Ambient air temperature for storage | -40...257 °F (-40...125 °C) |
| Ambient air temperature for operation | -40...176 °F (-40...80 °C) |
The SSP3A250B7 is a three-phase solid-state relay from the Schneider Harmony SSP series, rated for 50 A switching current on a 48-530 V AC output line. It uses zero-voltage switching, making it a clean fit for resistive heater banks and other loads where inrush suppression matters. Carrying CE, CSA, and UL marks per IEC 60950-1 and IEC 62314, it is panel-mounted with screw terminals and sealed to IP20. The green LED on the input side confirms control power status at a glance.
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