Finder 077.T3 – 77 Series Modular solid state relays – Accessory

Why Choose the Finder 077.T3 Thermal Pad for Three-Phase Solid State Relays?

The Finder 077.T3 is a dedicated thermal interface pad for three-phase solid state relays (SSRs), designed to improve heat transfer between compatible Finder 77 Series three-phase relays and their associated heat sinks or suitable metal mounting surfaces. Developed as part of Finder's 77 Series thermal management accessory range, it provides a practical solution for managing heat generated during industrial semiconductor switching.

Three-phase solid state relays are commonly used in demanding automation applications involving motor control, industrial heating and frequent electrical switching. Because their semiconductor switching elements generate heat during operation, an effective thermal interface is essential. The Finder 077.T3 helps improve contact between the relay mounting base and the heat sink by reducing the effects of small surface irregularities and air gaps that can restrict heat transfer.

Specifically intended for the larger three-phase Finder 77 Series SSR configurations, the Finder 077.T3 is distinct from the 077.T1 and 077.T2 thermal pads, which are designed for single-phase and two-phase models. Supplied in a pack of 10 thermal pads, it is a convenient accessory for electrical panel builders, industrial maintenance teams and OEM equipment manufacturers working with compatible three-phase solid state switching assemblies.

Key Advantages

• Purpose-designed thermal interface pad for Finder 77 Series three-phase solid state relays.
• Improves thermal contact between the SSR mounting base and a suitable heat sink.
• Helps reduce thermal resistance associated with microscopic gaps and uneven mounting surfaces.
• Supports effective heat dissipation in demanding three-phase switching applications.
• Designed for the larger mounting interface used by compatible three-phase SSRs.
• Provides a practical thermal management solution for industrial control panel installations.
• Supports reliable semiconductor operation when used with correctly selected cooling equipment.
• Passive accessory requiring no separate electrical power supply.
• Convenient 10-piece pack for multiple installations, maintenance and OEM production.
• Suitable for industrial heating, motor control and automated manufacturing equipment.

Key Features

• Finder 77 Series solid state relay accessory.
• Thermal interface pad for compatible three-phase SSRs.
• Designed specifically for larger Finder 77 Series three-phase hockey puck relays.
• Provides a thermally conductive interface between the relay and heat sink.
• Helps improve heat transfer across mating mounting surfaces.
• Supports thermal management in high-duty-cycle switching applications.
• Suitable for use with an appropriately selected heat sink or metal mounting surface.
• Designed to be positioned beneath the SSR before mechanical fastening.
• Does not require a separate electrical connection.
• Contains no integrated switching contacts, fan or electronic control circuitry.
• Distinct from the Finder 077.T1 and 077.T2 pads for single-phase and two-phase SSRs.
• Pack quantity: 10 pieces.
• EAN: 8012823461854.

Effective Heat Transfer for Three-Phase Solid State Relays

Three-phase solid state relays provide electronic switching of three-phase electrical loads without the moving contacts found in conventional electromechanical contactors. Their semiconductor construction makes them suitable for frequent switching, industrial temperature regulation and automated equipment where silent operation and consistent switching performance are important.

However, semiconductor switching devices generate heat whenever current flows through their power switching elements. In three-phase applications, the combined heat generated by the switching channels can make effective thermal management particularly important. The correct heat sink, suitable ventilation and a properly installed thermal interface all contribute to maintaining the relay within its permitted operating temperature range.

The Finder 077.T3 thermal pad is designed to sit between a compatible three-phase SSR and its heat sink or approved mounting surface. Its purpose is to improve the thermal interface between the two components, reducing the effect of microscopic surface irregularities that would otherwise create insulating air gaps.

By providing a more consistent contact interface, the thermal pad helps heat generated inside the relay transfer into the cooling surface. The heat sink can then dissipate this energy into the surrounding air, either through natural convection or through forced ventilation where a suitable fan-assisted arrangement is specified.

The 077.T3 is specifically intended for three-phase Finder SSRs. It should not be confused with the Finder 077.T1 or 077.T2, which are intended for single-phase and two-phase models. The 077.T2 is identified by Finder as the adhesive version for those smaller relay configurations; the 077.T3 should not automatically be assumed to have the same adhesive construction.

The Finder 077.T3 is a thermal interface accessory rather than a standalone cooling device. It cannot replace an appropriately sized heat sink, and it does not independently establish the safe operating current of an SSR. The complete installation must be assessed using the selected relay's thermal characteristics, ambient temperature, duty cycle, mounting arrangement and the manufacturer's heat sink selection guidance.

Typical Applications

• Thermal management of Finder 77 Series three-phase solid state relays.
• Industrial motor control and three-phase switching equipment.
• Three-phase electric heating and temperature regulation systems.
• Industrial automation panels and electrical control cabinets.
• Manufacturing machinery with frequent semiconductor switching.
• Process heating and industrial oven control equipment.
• Automated production and packaging machinery.
• OEM electrical control assemblies using three-phase SSRs.
• Industrial process control and power switching installations.
• Heat sink installation for compatible three-phase hockey puck relays.
• Maintenance and replacement of solid state relay thermal interface materials.
• Equipment upgrades requiring appropriate thermal management of three-phase switching devices.