40 A Solid State Relays (SSR)
40 A Solid State Relays (SSR) prices and range: 21 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
- Soljex 40A Single-Phase, 3-32VDC Solid State Relay DC Input, AC Output TRS1A40D40 — Soljex · SKU: TRS1A40D40 · TRY 290.48 · In stock
- Soljex 40A Single-Phase, 0-500 K Potentiometer Input, AC Output Solid State Relay TRS1A23VR40 — Soljex · SKU: TRS1A23VR40 · TRY 357.51 · In stock
- Soljex 40AMonofaze, 4-32VDC Solid State Relay DC Input, DC Output TSSR-40DD-H — Soljex · SKU: TSSR-40DD-H · TRY 357.51 · In stock
- Soljex 40A Single-Phase, 4-20mA Analog Input, AC Output Solid State Relay TRS1E23AA40 — Soljex · SKU: TRS1E23AA40 · TRY 558.61 · In stock
- Siemens 3RF2340-1AA02 Solid State Relay — Siemens · SKU: 3RF2340-1AA02 · TRY 8,396.00 · Made to order
- Siemens 3RF2440-1AB45 Solid State Relay — Siemens · SKU: 3RF2440-1AB45 · TRY 27,795.00 · Made to order
- Siemens 3RF2440-1AB55 Solid State Relay — Siemens · SKU: 3RF2440-1AB55 · TRY 28,994.00 · Made to order
- Siemens 3RF2340-1AA04 Solid State Relay — Siemens · SKU: 3RF2340-1AA04 · TRY 9,052.00 · Made to order
- Enda ERDA1-240Z Zero-Cross DIN Rail-Mounted Single-Phase Solid State Relay — Enda · SKU: ERDA1-240Z · TRY 839.15 · Made to order
- Enda EPDA1-240Z Solid State Relay 40A — Enda · SKU: EPDA1-240Z · TRY 645.50 · Made to order
- Enda EPDA1-440Z Solid State Relay 40A — Enda · SKU: EPDA1-440Z · TRY 710.05 · Made to order
- Enda ESAA1-240Z Zero-Cross Panel-Mounted Single-Phase Narrow Panel Solid State Relay — Enda · SKU: ESAA1-240Z · TRY 742.33 · Made to order
- Enda EPAA1-240Z Zero-Cross Panel-Mounted Single-Phase Solid State Relay — Enda · SKU: EPAA1-240Z · TRY 710.05 · In stock
- Enda ERAA1-240Z Zero-Cross DIN Rail-Mounted Single-Phase Solid State Relay — Enda · SKU: ERAA1-240Z · TRY 903.70 · Made to order
- Enda ERAA1-440Z Zero-Cross DIN Rail-Mounted Single-Phase Solid State Relay — Enda · SKU: ERAA1-440Z · TRY 935.98 · Made to order
- Enda ESGD1-440Z Zero Crossing Panel-Mounted Single-Phase DC-DC Solid State Relay — Enda · SKU: ESGD1-440Z · TRY 806.88 · Made to order
- Enda EPGD1-440Z Zero Crossing Panel-Mounted Single-Phase DC-DC Solid State Relay — Enda · SKU: EPGD1-440Z · TRY 806.88 · Made to order
- Enda EPGA1-240Z Zero-Cross Panel-Mounted Single-Phase Solid State Relay — Enda · SKU: EPGA1-240Z · TRY 645.50 · Made to order
- Enda EPAA1-440Z Zero-Cross Panel-Mounted Single-Phase Solid State Relay — Enda · SKU: EPAA1-440Z · TRY 742.33 · In stock
- Enda ERDA1-440Z Zero-Cross DIN Rail-Mounted Single-Phase Solid State Relay — Enda · SKU: ERDA1-440Z · TRY 839.15 · Made to order
- Enda ESDA1-240Z Zero-Cross Panel-Mounted Single-Phase Narrow Panel Solid State Relay — Enda · SKU: ESDA1-240Z · TRY 742.33 · Made to order
40 A Solid State Relays (SSR) (Current) Selection Guide
Compare 21 Solid State Relays (SSR) products featuring Current: 40 A across multiple manufacturers with technical specifications and live unit prices.
- Confirm that Current: 40 A 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 40 A Solid State Relays (SSR) (Current) used?
Solid State Relays (SSR) with Current: 40 A are selected when the project specification or load calculation requires this exact current rating in panels, machinery, or building installations.
How many 40 A Solid State Relays (SSR) models are listed on Welibaba?
Welibaba currently offers 21 active Solid State Relays (SSR) products with Current: 40 A from multiple manufacturers for direct technical and price comparison.
What other parameters should be checked alongside Current: 40 A?
In addition to Current: 40 A, 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