The Lovato TMSTA440 is a TMST series star-delta time relay engineered for dependable motor starting. This modular unit mounts on DIN rail and is suited to 380-440 VAC systems. Setup is quick via front potentiometers, offering multiscale timing to match your sequence. With 8 A Ith and 4 kV impulse withstand, the TMSTA440 delivers robust control performance for panel builders and maintenance teams seeking reliable, consistent transitions. Built for longevity and stability, the TMSTA440 achieves 30000000 mechanical cycles and operates from -20 to + 60 °C, with storage from -30 to + 80 °C. Weighing just 90 g, it helps keep panels compact while meeting IEC/EN 61812-1, UL508 and CSA C22.2 n°14. Use it to orchestrate dependable star-delta switching and simplify commissioning with clear, accessible adjustments.
£112.47
The Lovato Electric TMSTA440 is a specialised star-delta starting time relay designed for controlling reduced-voltage motor starting sequences in industrial automation applications. Featuring multiscale timing adjustment, 380-440VAC supply compatibility, potentiometer programming, and modular DIN rail mounting, the TMSTA440 provides reliable control for three-phase induction motor starters.
The Lovato TMSTA440 is part of the TM series of modular electronic time relays and is designed specifically for star-delta motor starting applications. The relay controls the timing sequence between star connection starting and delta operation, helping reduce motor starting current and providing smoother motor acceleration. The unit operates from a 380-440VAC supply, features adjustable timing via front potentiometers, and mounts on a standard 35mm DIN rail.
| Specification | Details |
|---|---|
| Brand | Lovato Electric |
| Part Number | TMSTA440 |
| Product Type | Time Relay |
| Function | Star-Delta Starting |
| Supply Voltage | 380-440VAC |
| Frequency | 50/60Hz |
| Timing Range | 0.1s to 10min |
| Programming Method | Potentiometers |
| Relay Outputs | 2 Normally Open Contacts |
| Contact Rating | 8A |
| Mounting Type | 35mm DIN Rail Mounting |
| Terminal Type | Screw Terminals |
| Module Width | 17.5 mm |
| Dimensions | 17.5 x 104.7 x 64.9 mm |
| Operating Temperature | -20°C to +60°C |
| Protection Rating | IP40 Front / IP20 Terminals |
| Weight | 90 g |
| EAN | 8013975154847 |
The Lovato TMSTA440 provides a reliable and compact solution for managing star-delta motor starting sequences. Its adjustable timing, robust relay outputs, DIN rail mounting, and dedicated star-delta function make it suitable for professional motor control applications requiring accurate switching control.
The Lovato TMSTA440 is used to control star-delta motor starting sequences by managing the transition timing between star and delta connections.
The Lovato TMSTA440 operates with a 380-440VAC supply voltage.
The relay provides adjustable timing from 0.1 seconds up to 10 minutes.
The Lovato TMSTA440 is designed for modular installation on a standard 35mm DIN rail.
| Voltage | 440 V |
|---|---|
| HS Code | 91070000 |
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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...