Solid State Relays with Push-In Spring Terminals: New Value for Control Panels
March 25, 2025
Solid State Relays with screw terminals are commonly used but more and more push-in terminals are becoming more prominent in industrial applications, especially due to new technologies now available on the market making it easier to insert wires.
How do push-in terminals work ?
Push-in technology is based on plug-in terminals, in which electrical contact is made and the conductor is fixed in place using a spring. The spring is opened by pushing in the conductor itself: Rigid conductors or conductors equipped with a ferrule can be directly connected without the need for any tools.
New range of celduc® Solid State Relays with push-in spring terminals
celduc® relais has now launched a new range of solid state relays with push-in spring terminals to provide more flexibility and meet the needs of various applications.
-Single phase Solid State Relays
SOR Series of single phase Solid State Relays with push-in terminals is suitable for resisitve loads AC-1.
- Versions 12-280Vac and 24-600Vac
- To control resistive loads up to 41A @ 40°C
- Thyristor rating up to 90A – 7200A²s
- Large input range : 3-32VDC with regulated current
- TVS protection
- Green input status LED
- cRUus (pending) , CE and UKCA
celduc® also offers “Ready to use” models with integrated heatsink.
-Two-phase Solid State Relays
celduc has extended their SOBR range of two-phase Solid State Relays with push-in terminals available for resistive loads AC-1.
- Versions 12-280Vac and 24-600Vac
- To control resistive loads up to 2 x 41A @ 40°C (thyristor rating up to 75A-7200A²s)
- Control voltage 10-30VDC
- TVS protection
- 2 x Green input status LED
- cRUus (pending) , CE and UKCA
celduc® also offers “Ready to use” models with integrated heatsink.
-Three-phase Solid State Relays
celduc’s 3-phase Solid State Relays are also available with push-in terminals to control resistive loads up to 3 x 41A @ 40°C or 3 x 32A @40°C (thyristor rating up to 125A per line).
They offer 2 versions depending on your application :
- Versions for resistive loads AC-1 : SGTR9XXXXX with TVS protection
- Versions for all types of loads : SGTR8XXXXX with RC+VDR protection
celduc® also offers “Ready to use” models with integrated heatsink.
-Four-Legs Solid State Relays
Integrating 4 single-phase relays in a “sightpac” style housing, our SMQR product family is the best choice to reduce the size of your control panel (compact 45 mm version). This range is suitable to control resistive loads up to 4 x 41A @ 40°C.
celduc® also offers “Ready to use” models with integrated heatsink.
What are the advantages of push-in terminals ?
“Push-In” connections offer many of advantages :
- STRONG
Push-in connections are strong and reliable. - FLEXIBLE
Push-in connections are suitable for various conductors : solid conductors, for stranded conductors, and for fine-stranded conductors with crimped-on ferrules. - SAFE
Push-in connections avoid downtime, maintenance, and reduce costs.
– No heat risk
– No risk of breaking the terminal inside the product
– Retightening of screws is no longer necessary and operation in vibrating environments is no longer a problem (Retightening screws is often necessary for screw terminals, but with push-in plus, there is no (re)tightening).
– Touchproof protection without a coverWith celduc new range of Solid state relays with push-in terminals, you will benefit from vibration-proof, fast and maintenance-free connections. - FAST
Less wiring and work with the new relay series with push-in plus technology: Fast wiring, even in tight spaces !
Just insert the wires – no tools required. Do all your wiring in less than half the time needed with screw type terminals.
Replacing a damaged relay is now quick and easy.
Conclusion
In comparison with screw terminals, push-in terminals are not only easier to handle, but also offer significant time and cost advantages over the entire life cycle of a system. Faster commissioning reduces upfront costs, and maintenance-free connections provide long-term savings. Furthermore, maintenance-free spring pressure connection technology offer a greater system uptime and equipment reliability
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