{"product_id":"camtec-esb303-series","title":"Camtec ESB303 Inrush Current Limiter 230\/400Vac 3-Phase","description":"\u003cp\u003eManaging inrush current across three-phase LED installations and machine building applications is significantly more complex than single-phase — each phase conductor needs independent limiting, and most budget solutions treat all three as one. The Camtec ESB303 handles each phase separately.\u003c\/p\u003e\n\u003cp\u003eA 3rd-generation peak and RMS inrush current limiter for 3-phase AC networks with a neutral conductor, the ESB303 actively limits inrush for 350ms on power-on across all three phase conductors, then bypasses via integrated relays so full load current passes through unimpeded. Limiting is precise to ±6% every cycle — no NTC thermistor degradation over time.\u003c\/p\u003e\n\u003cp\u003eThe ESB303 can be configured two ways: as three independent single-phase 230Vac limiters running in parallel (3×230Vac), or as a single 3×400Vac inrush limiter. Each phase connection supports up to 6,000µF of capacitive load at 48A peak (33.9A RMS). In practical terms, a single 16A MCB per phase can safely carry far more LED drivers or switch-mode power supplies than would otherwise be possible — reducing breaker count, cabling cross-section, and installation cost.\u003c\/p\u003e\n\u003cp\u003eThe neutral conductor (N) must be connected for the device to operate — the ESB303 powers itself between the phase conductors and neutral. For 3-phase systems without a neutral conductor, use the ESB00163 or ESB00323. The ESB303 is designed for capacitive loads only and is not suitable for use with transformers, AC motors, heaters, or DC voltage applications.\u003c\/p\u003e\n\u003cp\u003eHoused in a compact 5TE (97.8mm wide) IP20 UL94V-0 ABS DIN-Rail enclosure. Rated to IEC\/EN62368-1, IEC\/EN61010-1, IEC\/EN61010-2-201, IEC\/EN60950-1 with ANSI\/UL508 and CAN\/CSA C22.2 listings. Spring-type terminals up to 6mm² \/ 10AWG. Operating temperature −40°C to +60°C continuous.\u003c\/p\u003e","brand":"Powerbox","offers":[{"title":"ESB303.LED.200\/400(R2)","offer_id":44315611136051,"sku":"ESB303.LED.200\/400(R2)","price":0.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0594\/5960\/0435\/files\/camtec-esb303-inrush-current-limiter.png?v=1780472853","url":"https:\/\/www.powerbox.com.au\/products\/camtec-esb303-series","provider":"Powerbox Australia","version":"1.0","type":"link"}