Inrush Current Limiters B57238 Insulation Voltage 1000 VDC for 1 s, ∆R N/RN = ± 15 % S 238 Applications 17 max. 7 max. 23 max. ■ Switch-mode power supplies ■ Soft-start motors, e.g. in vacuum cleaners Features ■ Close resistance tolerance, 32+3 ■ ■ ■ ■ ■ ø1 improved insulation voltage Useable in series connections up to 265 Vrms Coated thermistor disk Kinked leads of tinned copper wire Wide resistance range UL approval (E69802) 7,5 TNT0293-3 Dimensions in mm Approx. weight 3 g Delivery mode Bulk (standard), cardboard tape, reeled or in Ammo pack Climatic category (IEC 60068-1) Max. power at 25 °C Resistance tolerance Rated temperature B value tolerance Dissipation factor (in air) Thermal cooling time constant (in air) Heat capacity Test voltage (t = 1 s) CT1) CT1) Parameters for 230 V 110 V R(I) 1) µF µF k n W °C mW/K s mJ/K VDC Ω No. of Imax (0 … 65 °C) R/T charA acteristic 2,5 8,4 1202 2800 700 2800 0,98 – 1,36 B57238S0259L002 3,0 7,4 1203 2900 700 2800 1,04 – 1,36 B57238S0309L002 5,0 6,4 1207 2965 700 2800 1,23 – 1,37 B57238S0509L002 R 25 B25/100 55/170/56 3,9 ± 15 % 25 ±3% approx. 20 approx. 80 approx. 1600 1000 Pmax ∆R N/R N TN ∆B/B δth τc Cth VT K Ordering code 1) For details on the capacitance CT as well as on the parameters k and n refer to “Application Notes”, pages 40 – 42. 140 05/02 Inrush Current Limiters B57238 Insulation Voltage 1000 VDC for 1 s, ∆R N/RN = ± 15 % S 238 Reliability data Test Standard Test conditions ∆R 25/R25 (typical) Remarks Storage in dry heat IEC 60068-2-2 Storage at upper category temperature T: 170 °C t: 1000 h < 10 % No visible damage Storage in damp heat, steady state IEC 60068-2-3 Temperature of air: 40 °C Relative humidity of air: 93 % Duration: 21 days <5% No visible damage Rapid temperature cycling IEC 60068-2-14 Lower test temperature: – 55 °C < 10 % Upper test temperature: 170 °C Number of cycles: 10 No visible damage Endurance I = Imax t: 1000 h < 10 % No visible damage Cyclic endurance I = Imax, 1000 cycles On-time = 1 min Cooling time = 6 min < 10 % No visible damage Transient load Capacitance = C T Number of cycles: 1000 <5% No visible damage 141 05/02 Herausgegeben von EPCOS AG Unternehmenskommunikation, Postfach 80 17 09, 81617 München, DEUTSCHLAND ++49 89 636 09, FAX (0 89) 636-2 26 89 ( EPCOS AG 2002. Vervielfältigung, Veröffentlichung, Verbreitung und Verwertung dieser Broschüre und ihres Inhalts ohne ausdrückliche Genehmigung der EPCOS AG nicht gestattet. Bestellungen unterliegen den vom ZVEI empfohlenen Allgemeinen Lieferbedingungen für Erzeugnisse und Leistungen der Elektroindustrie, soweit nichts anderes vereinbart wird. Diese Broschüre ersetzt die vorige Ausgabe. Fragen über Technik, Preise und Liefermöglichkeiten richten Sie bitte an den Ihnen nächstgelegenen Vertrieb der EPCOS AG oder an unsere Vertriebsgesellschaften im Ausland. Bauelemente können aufgrund technischer Erfordernisse Gefahrstoffe enthalten. Auskünfte darüber bitten wir unter Angabe des betreffenden Typs ebenfalls über die zuständige Vertriebsgesellschaft einzuholen. Published by EPCOS AG Corporate Communications, P.O. Box 80 17 09, 81617 Munich, GERMANY ++49 89 636 09, FAX (0 89) 636-2 26 89 ( EPCOS AG 2002. Reproduction, publication and dissemination of this brochure and the information contained therein without EPCOS’ prior express consent is prohibited. Purchase orders are subject to the General Conditions for the Supply of Products and Services of the Electrical and Electronics Industry recommended by the ZVEI (German Electrical and Electronic Manufacturers’ Association), unless otherwise agreed. This brochure replaces the previous edition. For questions on technology, prices and delivery please contact the Sales Offices of EPCOS AG or the international Representatives. Due to technical requirements components may contain dangerous substances. For information on the type in question please also contact one of our Sales Offices.