SSR Heat Sinks

An SSR heat sink is a cooling profile that is screwed to the metal base of a solid state relay and transfers the heat generated in the semiconductor to the air through its fins. Because the relay produces heat that rises with load current while conducting, it is used to run SSRs that drive heating loads such as ovens and resistive heaters close to their rated current. This category includes Enda ETS series fanless and fan-cooled heat sinks and Isıso ISS series DIN rail-mounted models made for single-phase and three-phase, 25 A, 40 A and 75 A SSRs. Select the heat sink according to the load current of the SSR, the single-phase or three-phase housing type, the ambient temperature inside the panel, whether fan or natural cooling is needed, and the mounting style. The manufacturer's current versus ambient temperature curve shows how many amperes the same relay can carry with which heat sink; for fan-cooled models, also account for the fan supply. An SSR heat sink is not a substitute for a panel fan or a panel air conditioner; it transfers heat from the relay into the panel, and the temperature inside the panel must be reduced separately by ventilation or air conditioning.

Products

How to choose SSR Heat Sinks

An SSR heat sink is a cooling profile that is screwed to the metal base of a solid state relay and transfers the heat generated in the semiconductor to the air through its fins. Because the relay produces heat that rises with load current while conducting, it is used to run SSRs that drive heating loads such as ovens and resistive heaters close to their rated current.

  • Separate sensing, motion control, logic processing and operator interface requirements.
  • Select signal type, supply voltage, communication protocol and I/O count for the machine network.
  • Verify housing size, sensing distance and PNP/NPN output polarity against the PLC input card.

Frequently asked questions

What is SSR Heat Sinks and where is it used?

An SSR heat sink is a cooling profile that is screwed to the metal base of a solid state relay and transfers the heat generated in the semiconductor to the air through its fins. Because the relay produces heat that rises with load current while conducting, it is used to run SSRs that drive heating loads such as ovens and resistive heaters close to their rated current.

What should I compare when choosing SSR Heat Sinks?

Select the heat sink according to the load current of the SSR, the single-phase or three-phase housing type, the ambient temperature inside the panel, whether fan or natural cooling is needed, and the mounting style.

Where can I find technical details for SSR Heat Sinks products?

An SSR heat sink is not a substitute for a panel fan or a panel air conditioner; it transfers heat from the relay into the panel, and the temperature inside the panel must be reduced separately by ventilation or air conditioning.

SSR Heat Sinks Selection Guide: Technical Criteria & Application Standards