Lovato HS1B2NT025D024 is a single-phase 25 A solid state relay with a 3–32 V DC control input, 12–280 V AC load voltage, SCR output and zero-crossing switching for industrial AC resistive loads.
£39.71
The Lovato HS1B2NT025D024 is a compact single-phase solid state relay (SSR) designed for reliable switching of AC resistive loads in industrial control and automation systems. Part of the Lovato HS1B solid state relay series, this hockey-puck-format device uses semiconductor switching technology to provide fast, silent operation without the mechanical contact wear associated with conventional electromechanical relays.
The HS1B2NT025D024 accepts a 3–32 V DC control signal and switches AC loads across a rated operating voltage range of 12–280 V AC. Its SCR semiconductor output uses zero-crossing switching, helping minimise electrical disturbances when switching compatible AC loads.
With a rated AC-51 operating current of 25 A at 40 °C and 20 A at 55 °C, the relay is well suited to heaters and other resistive-load switching applications. Screw terminals, high input-to-output isolation and integrated TVS output protection support dependable installation in industrial equipment and electrical control panels.
Unlike an electromechanical relay, the Lovato HS1B2NT025D024 switches loads electronically using an SCR semiconductor output. With no mechanical switching contacts to wear, the relay is particularly suitable for applications requiring frequent switching, quiet operation and long service life.
Its zero-crossing switching operates close to the AC waveform's zero-voltage point, helping reduce switching transients in suitable resistive-load applications. Correct thermal management is essential when operating solid state relays at higher currents, and the HS1B2NT025D024 should be installed with an appropriately rated heatsink where required by the application and ambient temperature.
| HS Code | 85365003 |
|---|---|
| Manufacturer | Lovato Electric |
| Series | HS1B Solid State Relays |
| Model | HS1B2NT025D024 |
| Product type | Solid state relay |
| Configuration | Single-phase |
| Number of poles | 1 |
| Housing format | Hockey puck |
| Control voltage | 3–32 V DC |
| Operating pick-up voltage | 3 V |
| Operating drop-out voltage | 1 V |
| Input current | 10–13 mA |
| Static output type | SCR |
| 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 |
| 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 |
| Fixing | Screw mounting |
| Operating position | Any |
| Operating temperature | −40 to +90 °C |
| Storage temperature | −40 to +100 °C |
| Weight | 90 g |
| Conformity | IEC/EN/BS 60947-4-3, IEC/EN/BS 60947-4-2, IEC/EN/BS 62314, IEC/EN/BS 60335-1 |
| Certifications | cURus, VDE, CSA |
| EAN | 8013975321546 |
The HS1B2NT025D024 is a single-phase solid state relay designed for electronic switching of AC loads, particularly AC-51 resistive loads such as industrial heating elements.
The relay is rated at 25 A AC-51 at 40 °C and 20 A AC-51 at 55 °C, subject to correct thermal management and installation.
The relay accepts a 3–32 V DC control input, making it suitable for use with compatible PLC and electronic control outputs.
The HS1B2NT025D024 has a rated operating voltage range of 12–280 V AC and an operational frequency range of 45–65 Hz.
Yes. Its SCR output uses zero-crossing switching, which is 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 compact semiconductor switching solutions for reliable, frequent and silent 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...