This 25A single phase Solid State Relay comes pre-fitted with an ND-25 heatsink for continuous-duty use straight out of the box — no separate heatsink purchase or fitting needed. Controlled by 3-32VDC, it switches AC loads from 40-480VAC at up to 25A.
Solid state relays are used for switching resistive and inductive loads, outperforming conventional mechanical relays with a life cycle measured in millions of operations, high switching speed with no mechanical or electrical noise, no dangerous sparks or wear, and low power needed for switching — a perfect choice when high control accuracy is fundamental.
✅ 1 Year Manufacturer Warranty — backed by our UK-based technical support
Novus SSR-4825 Datasheet Download
Novus SSR-4825 Manual Download
Technical Details
AC Load: 40-480 VAC @ 25A. DC Control: 3-32 Vdc
Switching: Zero crossing, optically isolated, dv/dt protection
Heatsink: ND-25, pre-fitted for continuous-duty thermal dissipation
Indication: Switching status indicator LED
Construction: Secure screw terminals, terminal shield, mounting pad, CE marked. Does not generate EMI/RFI
Frequently Asked Questions
Do I need to buy a heatsink separately?
No — this model comes with the ND-25 heatsink already fitted, ready for continuous-duty use straight out of the box.
Will this work with a non-Novus controller?
Yes — this is a universal DC-controlled SSR, triggered by any 3-32VDC signal within its input range. It's not limited to Novus controllers and works equally well with other brand temperature controllers, PLCs, and process controllers.
Is there a version without the heatsink?
Yes, see our standard 25A SSR if you're fitting your own heatsink or don't need one.
Industry Applications
- Continuous-Duty Heating — pre-fitted heatsink keeps the SSR within safe operating temperature under sustained load.
- Oven & Kiln Control — pairs directly with Novus PID temperature controllers.
- OEM Machinery on a Budget — ready-assembled SSR and heatsink saves separate sourcing and fitting time.