Lovato HS1B6NT040D024 is a single-phase 40 A hockey-puck solid state relay with 3.5–32 V DC control, 24–600 V AC load switching, SCR zero-crossing output, TVS protection and screw terminals for industrial resistive-load control.
£50.56
The Lovato HS1B6NT040D024 is a robust single-phase solid state relay (SSR) designed for reliable electronic switching of resistive AC loads in industrial control applications. As part of the Lovato HS1B solid state relay series, its hockey-puck construction combines semiconductor switching technology with secure screw terminals for straightforward installation in machinery and electrical control panels.
The HS1B6NT040D024 uses an SCR semiconductor output with zero-crossing switching, helping reduce electrical disturbances when compatible AC loads are switched. It accepts a 3.5–32 V DC control signal and switches loads across a wide 24–600 V AC rated operating range, making it suitable for interfacing with PLC outputs, temperature controllers and other low-voltage electronic control equipment.
Rated at 40 A AC-51 at 40 °C and 35 A AC-51 at 55 °C for resistive loads, the HS1B6NT040D024 provides substantial switching capacity in a compact single-pole package. A 1200 V blocking voltage, 500 A surge-current capability, TVS output protection and 4000 V input-to-output isolation make it a dependable solution for industrial heating, process control and frequently switched resistive loads when installed with appropriate thermal management.
Solid state relays switch electrical loads electronically without the moving contacts found in conventional electromechanical relays and contactors. This provides silent operation, rapid response and excellent switching endurance, making SSR technology particularly valuable for applications involving frequent ON/OFF cycles such as industrial heating and temperature-control systems.
The Lovato HS1B6NT040D024 combines these benefits with zero-crossing switching, a broad 24–600 V AC operating range and a low-voltage DC control input. Its 40 A AC-51 rating at 40 °C provides substantial capacity for resistive loads, while correct heatsink selection and thermal management help maintain reliable operation at higher continuous load currents.
| Manufacturer | Lovato Electric |
|---|---|
| Series | HS1B Solid State Relays |
| Model | HS1B6NT040D024 |
| Product type | Hockey-puck single-phase solid state relay |
| Number of poles | 1 |
| Control voltage | 3.5–32 V DC |
| Operating voltage pick-up | 3.5 V |
| Operating voltage drop-out | 2 V |
| Input current | 10–13 mA |
| Input reverse voltage | 32 V |
| Switching-on time | Half cycle maximum |
| Switching-off time | Half cycle maximum |
| Static output type | SCR |
| Switching mode | Zero crossing |
| Rated operating voltage | 24–600 V AC |
| Blocking voltage | 1200 V |
| Operational frequency | 45–65 Hz |
| Rated operating current AC-51 at 40 °C | 40 A |
| Rated operating current AC-51 at 55 °C | 35 A |
| Minimum operational current | 0.05 A |
| Non-repetitive surge peak current at 10 ms | 500 A |
| Off-state leakage current | 1 mA |
| On-state output voltage drop | 1.5 V |
| Critical rate of rise of off-state voltage | 500 V/µs |
| Input-to-output isolation | 4000 V |
| Input/output-to-metal-base isolation | 4000 V |
| Output protection | TVS |
| Specific let-through energy I²t | 1250 A²s |
| Junction-to-case thermal resistance | 0.55 K/W |
| Required heatsink at rated AC-51 current | ≤0.9 K/W |
| Control terminals | M4 screw |
| Control terminal conductor size | 0.75–2.5 mm² |
| Control terminal tightening torque | 1.2–2 Nm |
| Load terminals | M5 screw |
| Load terminal conductor size | 1.5–6 mm² |
| Load terminal tightening torque | 2–3 Nm |
| Fixing | Screw mounting |
| Allowable operating position | Any |
| Operating temperature | -40 to +90 °C |
| Storage temperature | -40 to +100 °C |
| Product weight | approx. 90 g |
| Package dimensions | 75 × 49 × 38 mm |
| Package volume | 139.65 cm³ |
| EAN | 8013975321560 |
| HS code | 85365003 |
| Certifications | cURus, VDE, CSA |
| Compliance | IEC/EN/BS 60947-4-3, IEC/EN/BS 60947-4-2, IEC/EN/BS 62314, IEC/EN/BS 60335-1 |
The HS1B6NT040D024 is a single-phase solid state relay designed for electronic switching of resistive AC loads, making it particularly suitable for industrial heating, temperature-control, machinery and automation applications.
The relay is rated at 40 A AC-51 at 40 °C and 35 A AC-51 at 55 °C for resistive loads, subject to correct installation and thermal management.
The HS1B6NT040D024 accepts a 3.5–32 V DC control signal, making it suitable for use with compatible PLC outputs, temperature controllers and other low-voltage electronic control devices.
The Lovato HS1B6NT040D024 has a rated operating voltage range of 24–600 V AC, an operational frequency range of 45–65 Hz and a blocking voltage of 1200 V.
Thermal management must be selected according to the actual load current, ambient temperature and duty cycle. Lovato specifies a heatsink thermal resistance of ≤0.9 K/W for operation at the rated AC-51 current at 40 °C and 55 °C.
Lovato HS solid state relays provide panel builders, machine manufacturers and automation engineers with robust semiconductor switching solutions for silent, reliable and frequent control of industrial electrical loads.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...
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...