The Samlex STS-30 transfer switch offers seamless power transitions between two separate AC input sources, ensuring you have a reliable energy source exactly when you need it. This intelligent switch can connect your utility power to a generator or inverter, making it an ideal choice for home backup systems and off-grid applications. With a rated capacity of 30 Amps at 120 VAC, this transfer switch is designed to meet the demands of modern power needs while enhancing the overall efficiency of your power management system.
The STS-30 features automatic switching between utility power and generator, inverter, or between generator and inverter. This flexibility makes it easy to maintain continuous power without manual intervention, providing peace of mind to users during outages.
Equipped with a robust Double Pole Double Throw (DPDT) relay, the Samlex STS-30 ensures efficient switching of both the line and neutral connections. This design enhances durability and reliability, catering to heavy use and reducing the risk of failure.
With the integrated DIP switch, users can enable a time delay of 20 to 25 seconds when switching to generator power. This feature safeguards your equipment by allowing generators to reach stable operation before load transfer, preventing potential damage from sudden power surges.
The transfer switch comes with a standard North American power cord, allowing simple connection to 15 Amp NEMA5-15R receptacles on generators or inverters with an 1800 VA capacity. For full 30 Amp capacity, users can easily replace the cord with a larger one if needed.
Weighing only 4.4 lbs (2.0 kg) and featuring compact dimensions (8.4 x 9.0 x 3.2 inches), the STS-30 can be conveniently mounted without taking up excessive space. This makes it suitable for various installation locations, maintaining clean aesthetics while providing powerful performance.
The Samlex STS-30 operates by seamlessly switching between two AC input sources, ensuring reliable power delivery to the household or equipment. With easy installation on either the line side of a main breaker panel or the load side to only switch dedicated circuits, the transfer switch is designed for versatility and practicality.
The device supports a steady input/output voltage of 120 VAC at 60 Hz, maintaining stable energy delivery for various types of electrical needs.
Built to operate efficiently within a temperature range of 0 – 40°C (32 – 104°F), the STS-30 functions reliably in a variety of environments, making it suitable for both residential and commercial applications.
Featuring a NEMA5-20R Duplex receptacle, this transfer switch allows for easy connection of battery chargers with a max of 20A and 16A continuous output. This adds an extra layer of utility and convenience for users who need to maintain battery systems.
| Model Number | STS-30 |
| Input/Output Voltage | 120 VAC, 60 Hz |
| Input/Output Current | 30A |
| Battery Charger Receptacle | NEMA5-20R, 20A Max, 16A Continuous, Fused at 20A |
| Knockouts | 1″ and ¾” |
| Maximum Operating Time of Relay | 25 msec |
| Delay Time for Generator Warm Up | 20 sec +/- 5 sec |
| Operating Temperature | 0 – 40°C / 32 – 104°F |
| Weight | 4.4 lbs / 2.0 kg |
| Dimensions (L x W x H) | 8.4 x 9.0 x 3.2 inches (213.4 x 228.6 x 81.3 mm) |
| Warranty | 2 Years |
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