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BCcomponents DATA SHEET 2322 661 97... Surface mount PTC thermistors for overload protection Product specification Supersedes data of 17th May 1999 File under BCcomponents, BC02 2001 Feb 14 BCcomponents Product specification Surface mount PTC thermistors for overload protection 2322 661 97... FEATURES • Ideal for pick-and-place circuit assembly • Low mounting height • Suitable for reflow soldering • Small ceramic diameter for faster response • Low heat transfer to substrate • Flat terminations for stable positioning and good solderability. APPLICATIONS • Telecom – Central office switching (C.O.) CCB833 – Subscriber terminal equipment (T.E.) – Set top box – Modems – Cable TV communications • General industry and automotive – Low power supplies overload protection Fig.1 Product outline. – Data bus protection. DESCRIPTION The component consists of a high-performance PTC ceramic disc mounted in a lead-frame for direct soldering onto a printed-circuit board (PCB) or substrate. The ceramic is soldered to the leadframe by a local reflow process, during which the solder layer is melted to the metallized ceramic surface using a low residue flux. QUICK REFERENCE DATA VALUE DESCRIPTION STANDARD TYPES(1)(2) 2 to 500 Ω Nominal R25 10 to 70 Ω ±10%; ±15%; ±20% Resistance tolerance Maximum overload current (voltage dependent) 2 to 10 A 50 to 500 mA at 25 °C Non-trip current Maximum voltage 50 to 100 mA at 70 °C 16 to 400 V (RMS) Response time at 25 °C and 20 W overload power 220 to 600 V ( RMS)