1-Phase Solid State Relays (SSR)

1-Phase Solid State Relays (SSR) prices and range: 121 models with current prices, stock status and specifications at Welibaba. A solid state relay (SSR, semiconductor relay) is a contactless relay that switches the load with semiconductor elements such as a triac, thyristor or transistor instead of a mechanical contact. Because it has no moving parts, it operates silently and has no contact wear; for this reason it is used on loads that switch on and off frequently, such as resistive heaters and ovens. This category includes single-phase and three-phase relays with load currents such as 25 A, 40 A and 100 A and 3-32 V DC or AC control, and analog models with 4-20 mA, 0-10 V or potentiometer input, from the brands Isıso, Enda, Siemens and Soljex. Select the SSR according to the load type (AC or DC, resistive or inductive), the load current and voltage, the control signal, the number of phases, and whether you need zero-crossing or analog-input operation. The rated current is given for a specific cooling condition; check whether a heat sink is included and the manufacturer's current-temperature curve. An SSR should not be confused with a contactor or an electromechanical relay: it passes a leakage current even when off and does not physically isolate the circuit, and models with AC outputs cannot switch off a DC load.

Products

1-Phase Solid State Relays (SSR) (Phase Type) Selection Guide

Compare 121 Solid State Relays (SSR) products featuring Phase Type: 1-Phase across multiple manufacturers with technical specifications and live unit prices.

  • Confirm that Phase Type: 1-Phase matches your circuit load, installation environment, and standard requirements.
  • Compare secondary attributes such as voltage rating, protection class, and mounting style across available brands.
  • Review manufacturer datasheets and stock quantities on each product page before finalizing your BOM.

Frequently asked questions

Where are 1-Phase Solid State Relays (SSR) (Phase Type) used?

Solid State Relays (SSR) with Phase Type: 1-Phase are selected when the project specification or load calculation requires this exact phase type rating in panels, machinery, or building installations.

How many 1-Phase Solid State Relays (SSR) models are listed on Welibaba?

Welibaba currently offers 121 active Solid State Relays (SSR) products with Phase Type: 1-Phase from multiple manufacturers for direct technical and price comparison.

What other parameters should be checked alongside Phase Type: 1-Phase?

In addition to Phase Type: 1-Phase, always verify compatibility of mounting dimensions, terminal capacity, environmental protection rating, and relevant IEC/EN standards.

Solid State Relays (SSR) Selection Guide: Technical Criteria and Engineering Practice