Are high inrush currents on startup causing damages in the transformer primary circuit ? Switching ON the primary of an AC transformer can often generate high inrush currents. Applying electric power to the primary of a transformer can lead to more or less big troubles, especially if this operation is intended to be very frequent. […]
Thermal Pads or Thermal Paste : How making the right choice ? The proper sizing of the heatsink is not the only consideration when creating an SSR assembly. Another critical consideration if the proper mounting of the Solid State Relay to the heatsink itself, which can greatly effect the efficiency of the “thermal system” and […]
Short-circuit protections According to the European Low Voltage Directive 2014/35/EU (Annex I, article 3, point c), you need to protect your equipment against hazards which may be caused by external influences on the electrical equipment. “Technical measures shall be laid down in accordance with point 1 ( especially point (c) the electrical equipment shall be […]
What is the cURus Approval ? The solid state relays and contactors made by celduc® relais are manufactured in compliance with cURus standard. Today we will give you more clarification about cURus approval. The cURus mark indicates that our products meet Canadian and U.S. safety standards. cURus is an approval from the UL, also named […]
How to choose a proper Heat Sink ? Heat sinks are an important element in circuit design because they provide an efficient path for heat to be transferred into the ambient air and away from electronic devices (Solid State Relays). For any electronics design, “Thermal Management” is the key element, which decides the optimal performance and […]
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Sales department France :
+33 (0) 4 77 53 90 20
Export sales department :
+33 (0) 4 77 53 90 21
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Gender Equality Index 2026
Based on 2025 data
Final result: 88/100 (for more information)
