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To ensure accuracy, please note that images may be representative. Refer to the product data sheet for detailed specifications.
| Manufacturer | SSAC / Littelfuse |
| Manufacturer Product Number | TCSH15B |
| Description | Current Monitor Relay; Current Switch NC; 15A fixed; 24-240V AC |
| Datasheet | Download Datasheet |
The Littelfuse SSAC TCSH15B is a self-powered AC current switch with a built-in toroid and a normally closed 1 A solid-state output, for a 24-240 V AC output supply. Its actuate point is fixed at 15 A at the factory.
Output opens when the current reaches the actuate point and closes when it falls below about 95% of it; sinks or sources current straight into a PLC digital input, or drives relays, lamps, valves and small heaters.
Sensor: Built-in toroidal sensor (through-hole wiring, up to #4 AWG THHN); 50 A-turns steady, 300 A-turns inrush for 10 s. Response: 200 ms overcurrent, 1 s undercurrent response. Output: 1 A steady, 10 A inrush, solid state. Hysteresis: Resets at ≈95% of the actuate current. Accuracy: +0 / -20%; ±5% over temperature and voltage. Power: Self-powered (burden under 0.5 VA).
It is surface mounted with one #10 screw and has 0.250 in (6.3 mm) male quick-connect terminals. The monitored conductor must be insulated. Dimensions: 50.8 x 50.8 x 44.5 mm (2 x 2 x 1.75 in), H x W x D. It operates from -20 to +60 °C and stores from -40 to +85 °C.
| Category | |
| Manufacturer | SSAC / Littelfuse |
| Model | TCS |
| Monitoring Function | AC current switch, normally closed (go / no-go) |
| Sensor Type | Built-in toroidal sensor (through-hole wiring, up to #4 AWG THHN); 50 A-turns steady, 300 A-turns inrush for 10 s |
| Setting Adjustment | Factory fixed |
| Current Range | 15 A fixed |
| Output Mode | Output opens when the current reaches the actuate point and closes when it falls below about 95% of it; sinks or sources current straight into a PLC digital input, or drives relays, lamps, valves and small heaters |
| Input Voltage | 24-240V AC |
| Input Operating Range | 24-240 V AC output supply, +10% / -20% |
| Trip Delay | 200 ms overcurrent, 1 s undercurrent response |
| Setting Accuracy | +0 / -20%; ±5% over temperature and voltage |
| Hysteresis | Resets at ≈95% of the actuate current |
| Reset Method | Automatic |
| Contact Configuration | 1B SPST-NC |
| Output Rating | 1 A steady, 10 A inrush, solid state |
| Mounting Type | Surface Mount |
| Termination Style | Quick Connect - 0.250" (6.3mm) |
| Dimensions | 50.8 x 50.8 x 44.5 mm (2 x 2 x 1.75 in), H x W x D |
| Rated Power | Self-powered (burden under 0.5 VA) |
| Operating Temperature (Storage) | -20...+60 °C (-40...+85 °C) |