Product description
SSR‑2528ZD3 – Robust Solid State Relay (SSR) from QLT Power. The SSR-2528ZD3 is a robust solid state relay (SSR) from QLT Power. It can replace mechanical relays in industrial applications where silent operation, high durability, and fast switching are desired. The relay features a high rated current, a wide AC voltage range, zero-cross switching, and LED status indication.
Zero-cross switching in solid state relays means that the relay turns the load on or off when the alternating (AC) drive voltage crosses zero volts—that is, when the voltage is at its lowest point in the sinusoidal cycle. This provides several technical benefits, especially when controlling resistive or moderately inductive loads. It significantly reduces EMI, increases the service life of connected loads, lowers thermal stress on the relay, and improves current control during startup.
Specifications:
- Control voltage: 3–32 VDC (compatible with 3.3 V and 5 V logic levels)
- Rated current (max): 25 A (requires heat sink)
- Rated voltage: 24–280 VAC
- Phases: Single-phase
- Zero-cross switching: Yes
- LED indicator: Indicates when the relay is active
- Connection type: Screw terminals
- Frequency range: 47–63 Hz
- Weight: 157 g
- Operating temperature range: –20 °C to +80 °C
Applications:
- Industrial control systems: Especially where silent and fast AC switching is critical
- Automation & machinery: For example, pump control, heating, or lighting systems
- Retrofits: Efficient choice for upgrading legacy systems with mechanical relays
- Wide voltage compatibility: Operates from 24 to 280 VAC
