SSR Solid State Relay Module

Specifications:

1. Model: SSR-xxDA or SSR-xxAA (where xx refers to the rated load current, and “DA” or “AA” refers to the input-output control type: DA for DC-to-AC and AA for AC-to-AC).
2. Type:
   • DC-to-AC (DA): Controls AC loads using a DC input control signal.
   • AC-to-AC (AA): Controls AC loads using an AC input control signal.

Electrical Specifications:

1. Load Voltage Range:
   • Typically between 24V AC to 480V AC for AC control versions.
   • DC load models, range between 5V DC to 200V DC.
2. Load Current:
   • 10A, 25A, 40A, 60A, 80A, and sometimes higher, depending on the module model and rating.
3. Input Control Voltage:
   • For DC-controlled versions, the typical input control voltage is 3-32V DC.
   • For AC-controlled versions, the typical input control voltage is 90-280V AC.
4. Input Control Current: Generally ranges between 5 to 30mA, depending on the model.
5. Output Voltage (Load side):
   • 24V AC to 480V AC for typical AC load models.
   • The peak voltage can be much higher for specialized modules.
6. On-State Voltage Drop: Typically, around 1.0-1.5V across the relay in the ON state, which can vary.
7. Insulation Resistance:
   • Common values are 1000MΩ or higher at 500V DC between input and output.
8. Dielectric Strength:
   • Typically, 2500V AC between input and output or between output terminals.
9. Leakage Current (Off-State):
   • Around < 2-10mA depending on the model and load capacity when in an OFF state.
10. Turn-On Time: Around 10ms to 20ms (depending on zero-crossing detection circuitry).
11. Turn-Off Time: Around 10ms to 20ms (depending on zero-crossing detection circuitry).

Mechanical Specifications:

1. Dimensions: Varies by model, but typical sizes for single-phase SSR modules are around 60mm x 45mm x 30mm.
2. Mounting Style:
   • DIN rail mountable or panel mountable.
   • Some SSRs may come with mounting holes.
3. Cooling Requirements:
   • Heatsinks are often required for high-current SSR modules.
   • Some SSRs come with integrated heatsinks, while others may need external ones.
4. LED Indicator:
   • An LED indicator to show whether the relay is ON (triggered) or OFF.

Features:

1. Zero-Crossing Detection: Ensures that switching occurs when the AC voltage crosses zero, minimizing electrical noise and wear.
2. Random Turn-On: Available in certain versions where zero-crossing is not needed, providing quicker response time.
3. Isolation: Electrical isolation between input and output circuits, typically through optocouplers, ensures safety and prevents back EMF from affecting the control circuit.
4. Surge Protection: Some models come with built-in surge protection components such as MOVs (Metal Oxide Varistors) or TVS diodes for protection against voltage spikes.

Environmental Specifications:

1. Operating Temperature:
   • Typically between -30°C to 80°C (may vary depending on cooling, load, and current).
2. Storage Temperature:
   • Generally between -40°C to 100°C.
3. Humidity:
   • Operable at 40-85% relative humidity, non-condensing.
4. Vibration/Shock Resistance: Some SSRs are designed to be resistant to mechanical vibrations and shocks.