77 Series Solid State Relays – heat sinks and thermal pads
New accessories for Finder's "hockey puck" style Solid State Relays
Finder’s “hockey puck” style Solid State Relays are designed to meet the challenges of modern automation applications with high switching frequencies. The 77 Series SSR relays ensure a virtually unlimited electrical life and the total absence of electric arcs or bouncing.
These devices are the ideal solution for managing:
- Resistive loads(such as industrial heaters)
- Solenoid and motor loads
- Lighting systemswith high inrush currents
77 Series – single phase, dual phase, and three phase devices
Finder 77 Series hockey puck SSR relays are available in three main types:
– Single phase, with rated current from 25 A to 125 A, voltage up to 660 V AC; models with flip-up terminal covers.
– Dual phase configuration, with rated current from 25 A to 75 A, two independent channels (random switching).
– Three phase configuration, with rated current from 25 to 80 A, random switching, optimized for fast motor control.
Depending on the model, you can choose between Zero-crossing or Random mode.
A range of accessories for maximum heat dissipation
The latest addition to the Finder catalogue is the introduction of accessories, designed to maximize relay efficiency and prevent overheating, ensuring that performance remains constant even in harsh environmental conditions.
1. HEAT SINKS AND FORCED VENTILATION
The use of a suitable heat sink is important for the longevity of an SSR. Depending on the model, heat sinks can be installed on a rail or directly on the electrical enclosure. For more demanding applications, heat sinks with integrated fans are now available:
- Type 077.03.9.024: with 24 V DC power supply.
- Type 077.03.8.230: with 230 V AC power supply.
2. THERMAL PADS
To ensure maximum heat transfer from the relay to the heat sink (or to the panel), we recommend using the new thermal pads during installation:
- 077.T1 / 077.T2: For single phase and two phase models (the T2 version is adhesive to facilitate positioning)
- 077.T3: For the larger three phase SSRs
Why choose the 77 Series?
Integrating the 77 Series relays with their accessories not only protects your investment, but also optimizes the space and energy efficiency of the electrical panel. Thanks to the low-power input circuit and advanced thermal management, the system is reliable, compact, and ready for the most intensive work cycles of Industry 4.0.
To learn more, browse the technical brochure or visit the dedicated product page.
