Lovato HS1B2NT025E230 is a single-phase 25 A solid state relay with an 18–280 V AC/DC control input, 12–280 V AC load voltage, SCR output and zero-crossing switching for industrial resistive loads.
£50.21
The Lovato HS1B2NT025E230 is a single-phase 25 A solid state relay designed for reliable electronic switching of AC resistive loads. Part of the Lovato HS1B series, its industrial hockey-puck construction combines an SCR semiconductor output with zero-crossing switching for fast, silent operation without mechanical switching contacts.
The HS1B2NT025E230 features a particularly versatile 18–280 V AC/DC control input and switches loads across a rated operating voltage range of 12–280 V AC. Its broad control-voltage range makes it suitable for a variety of industrial control circuits while the zero-crossing output helps minimise switching disturbances when controlling compatible AC loads.
Rated for 25 A AC-51 at 40 °C and 20 A AC-51 at 55 °C, the relay is well suited to heaters and other resistive loads. High electrical isolation, integrated TVS output protection and robust screw terminals provide a dependable solution for industrial machinery, temperature-control equipment and automation panels.
The Lovato HS1B2NT025E230 switches AC loads electronically through an SCR semiconductor output, eliminating the moving contacts found in conventional electromechanical relays. This enables quiet operation and makes the relay particularly suitable for applications involving frequent switching cycles.
Its zero-crossing switching activates the output close to the AC waveform's zero-voltage point, helping reduce electrical disturbances when switching compatible resistive loads. Correct thermal management remains important at high load currents, and a suitably rated heatsink should be selected according to the relay current and installation conditions.
| HS Code | 85365003 |
|---|---|
| Manufacturer | Lovato Electric |
| Series | HS1B Solid State Relays |
| Model | HS1B2NT025E230 |
| Product type | Solid state relay |
| Configuration | Single-phase |
| Number of poles | 1 |
| Housing format | Hockey puck |
| Control voltage | 18–280 V AC/DC |
| Operating pick-up voltage | 18 V |
| Operating drop-out voltage | 8 V |
| Input current | 4.5–6 mA |
| Static output type | SCR (silicon controlled rectifier) |
| Switching mode | Zero crossing |
| Rated operating voltage | 12–280 V AC |
| Blocking voltage | 600 V |
| Operational frequency | 45–65 Hz |
| Rated operating current AC-51 at 40 °C | 25 A |
| Rated operating current AC-51 at 55 °C | 20 A |
| Minimum operational current | 0.05 A |
| Non-repetitive surge peak current | 340 A at 10 ms |
| Off-state leakage current | 1 mA |
| On-state voltage drop | 1.25 V |
| Critical rate of rise of off-state voltage | 500 V/µs |
| Thermal resistance, junction to case | 1.6 K/W |
| Required heatsink thermal resistance at rated AC-51 current | ≤2.2 K/W |
| Input-to-output isolation | 4000 V |
| Input/output-to-metal-base isolation | 4000 V |
| Output protection | TVS |
| I²t | 600 A²s |
| Control terminals | M4 screw |
| Load terminals | M5 screw |
| Operating temperature | −40 to +90 °C |
| Storage temperature | −40 to +100 °C |
| Weight | 90 g |
| Package dimensions | 75 × 49 × 38 mm |
| Conformity | IEC/EN/BS 60947-4-3, IEC/EN/BS 60947-4-2, IEC/EN/BS 62314, IEC/EN/BS 60335-1 |
| EAN | 8013975321553 |
The HS1B2NT025E230 is a single-phase solid state relay designed primarily for electronic switching of AC-51 resistive loads such as industrial electric heaters.
The relay accepts a wide 18–280 V AC/DC control voltage, allowing it to operate with compatible AC or DC industrial control circuits.
The HS1B2NT025E230 is rated at 25 A AC-51 at 40 °C and 20 A AC-51 at 55 °C, subject to correct installation and thermal management.
The relay has a rated operating voltage range of 12–280 V AC with an operational frequency range of 45–65 Hz.
Yes. The SCR output uses zero-crossing switching, making the relay particularly suitable for controlled switching of compatible AC resistive loads.
Lovato HS series solid state relays provide machine builders, panel manufacturers and automation engineers with robust semiconductor switching solutions for frequent, silent and reliable control of industrial electrical loads.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...