Refrigerating & Heating thermostat STC-100A
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STC-100A Digital Temperature Controller
- Model: STC-100A
- Temp Range: -40°C ~ 99°C
- Output: 10A / 220VAC relay
- Sensor: 2m NTC probe
- Modes: Cooling / Heating switchable
- Features: LED display, ±1°C accuracy, delay protection, calibration, IP54 front panel
Compact, reliable, and easy to program. Ideal for refrigerators, freezers, greenhouses, aquariums, and HVAC systems. Built-in anti-short-cycle protection prevents compressor damage.
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1. Basic Product Info
- Model: STC-100A Digital Temperature Controller
- Core Functions: Cooling/Heating mode switch, temperature setpoint & differential control, start/stop delay protection, temperature range limiting, temperature calibration, sensor fault alarm
- Dimensions:
- Panel: 77×34.5 mm
- Mounting hole: 71×29 mm
- Unit: 77×34.5×62 mm
- Sensor cable length: 2m (with probe)
2. Key Specifications
- Power Supply: 220VAC ±10%/-15%, 50/60Hz
- Power Consumption: <3W
- Temperature Measuring/Control Range: -40℃ ~ +99℃
- Resolution: 1℃; Accuracy: ±1℃ ±0.5 digit
- Relay Output: 10A(0.5HP)/220VAC
- Sensor Type: NTC
- Panel Protection Rating: IP54
- Operating Environment: 0~60℃, 20%~85% RH (non-condensing)
3. Operation & Display
- Display: 2-digit LED for temperature and status indication
- Buttons: SET (Setting), ▲ (Up), ▼ (Down)
- Quick Operations:
- Short press SET: Adjust temperature setpoint
- Long press SET (>4s): Enter parameter menu
- Auto-save & exit after 4s of inactivity
4. Core Parameter Menu (Key Items)
| Code | Function | Range | Default |
|---|---|---|---|
| HC | Operation Mode (Cooling C / Heating H) | — | C |
| d | Temperature Differential | 1~15℃ | 5℃ |
| CA | Temperature Calibration | -7~+7℃ | 0℃ |
| — | Output Delay Protection | 0~7min | 1min |
| SP | Temperature Setpoint | LS~HS | — |
5. Control Logic
- Cooling Mode: Relay ON when measured temp ≥ setpoint + differential; Relay OFF when measured temp ≤ setpoint
- Heating Mode: Relay ON when measured temp ≤ setpoint; Relay OFF when measured temp ≥ setpoint + differential
- Fault Indications:
EE= Sensor fault (output disabled)HH= Over-temperatureEr= Memory error
6. Safety Notes
- Always disconnect power before wiring; clearly separate power, sensor and relay terminals
- Do not use in overloaded, humid, high-temperature, strong electromagnetic or corrosive environments
- Ensure voltage compatibility and stable power supply; keep sensor cable away from power lines
Additional information
| Weight | 2.5 kg |
|---|---|
| Dimensions | 17 × 9 × 11 cm |
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