PTCTL www.vishay.com Vishay BCcomponents PTC Thermistors, Overload Protection for Telecommunication FEATURES • Wide resistance range in telecom area from 4 Ω to 70 Ω • Fast protection against power contact faults • Withstand high overload currents of up to 10 A • High voltage withstanding capabilities for the larger sized thermistors (up to 600 V) • Good tracking over a wide temperature range for all matched or binned thermistors (matching at 85 °C ≤ 2 x matching at 25 °C) • UL1434 approved types available (XGPU2) • All telecom PTCs are coated with a high temperature silicon lacquer (UL 94 V-0) to protect them from any harsh environments and to improve their lifetime • Material categorization: for definitions of compliance please see www.vishay.com/doc?99912 QUICK REFERENCE DATA PARAMETER VALUE UNIT Maximum voltage (RMS or DC) 220 to 600 VRMS Maximum holding current (Int) 100 to 175 mA Resistance at 25 °C (R25) 8 to 50 Ω Tolerance on R25 value 15 to 25 % 0.6 to 10.0 A 1 to 40 s 0 to 70 (95) °C Maximum overload current Iol Tripping time at 1 A Operating temperature range at max. voltage APPLICATIONS Over-temperature/over-load protection: • Main distribution frame (MDF) • Central office switching (C.O.) • Subscriber terminal equipment (T.E.) • Set-top box (S.B.) MARKING Clear marking on a gray coated body BC and R25 value ELECTRICAL DATA AND ORDERING INFORMATION RESISTANCE R25 (Ω) 25 10 25 16 10 25 10 8 16 10 10 50 35 25 25 10 10 TOL. (%) ± 20 ± 20 ± 15 ± 20 ± 20 ± 20 ± 20 ± 25 ± 25 ± 20 ± 20 ± 20 ± 20 ± 20 ± 20 ± 20 ± 20 MATCHING (Ω) Vmax. (VRMS) 1.0 1.0 no no no 1.0 no 0.5 no no 1.0 1.0 3.0 0.5 0.5 0.5 no 220 230 245 245 245 250 250 285 300 350 350 600 600 600 600 600 600 NON-TRIP CURRENT TRIP CURRENT Int (mA) 70 100 70 140 140 70 100 135 100 100 100 50 70 70 70 175 175 It (mA) 200 250 200 270 270 175 450 400 250 270 270 140 600 170 170 400 400 at T (°C) 70 70 70 55 55 70 70 95 70 70 70 70 70 70 70 25 25 at T (°C) 25 25 25 25 25 25 0 25 25 25 25 25 0 25 25 25 25 MAX. TRIP TIME at 1 A tmax. (S) 2.5 3.0 5.0 8.0 8.0 1.3 40.0 6.0 2.0 4.0 4.0 1.0 3.0 2.5 5.0 7.0 7.0 Imax. AT Vmax. Imax. (A) 4.0 2.0 2.6 1.6 2.0 3.2 10.0 0.6 2.6 1.0 1.0 1.0 1.0 2.0 2.0 1.0 1.0 APPLICATION AREA (2) ORDERING PART NUMBERS C.O. MDF; ISDN C.O. T.E. T.E. MDF; C.O. T.E. MDF; ISDN MDF; T.E. T.E.; S.B. C.O. C.O. C.O. C.O. C.O. C.O. T.E.; S.B. PTCTL4MR250GTE PTCTL3MR100GTE PTCTL4NR250GTE PTCTL6NR160GTE PTCTL6NR100GTE PTCTL3MR250HTE PTCTL8NR100HBE PTCTL4MR080JBE PTCTL3NR160KTE PTCTL4NR100LBE PTCTL4MR100LTE PTCTL4MR500SBE PTCTL4MR350STE PTCTL4MR250STE PTCTL6MR250STE PTCTL7MR100SBE (1) PTCTL7NR100SBE (1) Notes • All types pass ITU-T K20-21-45 telecommunication protection recommendation (1) UL 1434 approved types and compatible with UL1459 and GR1089 (2) MDF: Main Distribution Frame; C.O.: Central Office Switching; T.E.: Subscriber Terminal Equipment; S.B.: Set-top Box Revision: 13-Nov-15 Document Number: 29070 1 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 PTCTL www.vishay.com Vishay BCcomponents OVERCURRENT PROTECTION OF TELECOMMUNICATION LINES In case of overcurrent due to short-term induction of alternating voltages, currents of several amperes with voltages as high as 650 VRMS can be present for several seconds. The PTC thermistor must protect the telephone line circuit against overcurrent which may be caused by the following events: • Surges due to lightning strikes on or near to the line plant. For standard high voltage applications, resistance values from 25 Ω to 50 Ω are available. However, ISDN networks which carry high-frequency sound and vision, need lower line impedance. • Short-term induction of alternating voltages from adjacent power lines or railway systems, usually caused when these lines or systems develop faults. • Direct contact between telephone lines and power lines. Telecommunication designers are therefore demanding high voltage thermistors with much lower R25 values, which places even greater demands on the manufacture of PTC thermistors. For these applications PTC thermistors which have a R25 value of 10 Ω with voltages in the 300 VRMS to 600 VRMS range are available. To provide good protection under such conditions a PTC thermistor is connected in series with each line, usually as secondary protection; see Typical Telephone Line drawing fig. 1. However, even with primary line protection (usually a gas discharge tube), the PTC thermistor must fulfil severe requirements. In a typical telephone line application, two PTC thermistors are used, one each for the tip and ring (or A and B) wire together with their series resistors. For good line balance it is important that the thermistor and resistor pairs are matched. Surge pulses of up to 2 kV can occur and in order to withstand short-term power induction the PTC thermistor must withstand high voltages. If the line has primary protection a 220 V to 300 V PTC thermistor is adequate. Without primary protection, however, a 600 V PTC device is necessary. Vishay BCcomponents manufacturers a range of PTC thermistors (see Electrical Data and Ordering Information Table) covering both requirements. In the case of direct contact between the telephone line and a power line, the PTC thermistor must withstand very high inrush power at normal mains voltage. Under such conditions, overload currents of up to 10 A on a 230 V mains could occur for up to several hours. To handle this power, the resistance/temperature characteristic of the thermistor must have a very steep slope and the ceramic must be extremely homogeneous. PRIMARY PROTECTION (OPTIONAL) + SECONDARY PROTECTION + PTC subscriber lines PTC voltage clamp + + SUBSCRIBER LOOP INTERFACE CIRCUIT (SLIC) OR TRANSFORMER PTC MDF Fig. 1 - Typical telephone line showing where PTC thermistors can be used for overcurrent protection. Revision: 13-Nov-15 Document Number: 29070 2 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 PTCTL www.vishay.com Vishay BCcomponents PTC THERMISTORS IN BULK T D H3 H2 F L1 d COMPONENT DIMENSIONS (in mm) D MAX. 8.5 7.0 8.3 11 11 7.0 13.6 8.3 7.0 8.5 8.5 8.5 8.0 8.5 10.5 13 13 T MAX. 5.0 4.0 4.0 4.5 4.5 4.0 6.0 5.0 4.0 4.0 4.0 4.0 5.0 4.0 5.0 5.5 5.5 H2 L1 1.5 to 3.0 2.0 ± 0.5 1.5 to 3.0 4.0 ± 1.0 4.0 ± 1.0 2.0 ± 0.5 4.0 ± 1.0 1.5 ± 0.5 2.5 ± 0.5 2.5 ± 0.5 2.5 ± 0.5 2.5 ± 0.5 2.5 ± 0.5 2.0 ± 0.5 2.0 ± 0.5 4.0 ± 1.0 4.0 ± 1.0 20 ± 4.0 20 ± 3.0 4.1 ± 0.5 4.1 ± 0.5 20 min. 20 min. H3 MAX. 11.5 9.8 11.0 15.5 15.5 9.8 18.6 10.3 10.0 11.5 11.5 11.5 11.0 11.0 12.6 18.0 18.0 PACKAGING (1)(2) TYPE SPQ Taped on reel 1500 Taped on reel 1500 Taped on reel 1500 Taped on reel 1500 Taped on reel 1500 Taped on reel 1500 Bulk 200 Bulk 250 Taped on reel 1500 Bulk 500 Taped on reel 1500 Bulk 500 Taped on reel 1500 Taped on reel 1500 Taped on reel 1500 Bulk 200 Bulk 200 H0 16 18 18 16 16 18 16 16 16 16 16 - ORDERING PART NUMBER PTCTL4MR250GTE PTCTL3MR100GTE PTCTL4NR250GTE (3) PTCTL6NR160GTE PTCTL6NR100GTE (3) PTCTL3MR250HTE PTCTL8NR100HBE (3) PTCTL4MR080JBE PTCTL3NR160KTE PTCTL4NR100LBE PTCTL4MR100LTE PTCTL4MR500SBE PTCTL4MR350STE PTCTL4MR250STE PTCTL6MR250STE PTCTL7MR100SBE PTCTL7NR100SBE Notes (1) Taped in accordance with IEC 60 286-2 (2) Metallized ceramic pellet for clamping or substrate mounting, available on request (3) Insulated version is also available PTC THERMISTORS ON TAPE AND REEL T P P D TAPE AND REEL ACCORDING TO IEC 60286-2 (in mm) P h SYMBOL PARAMETER D Body diameter see table max. d Lead diameter 0.6 ± 0.05 P Pitch between thermistors 12.7 ±1 P0 Feedhole pitch 12.7 ± 0.3 F Leadcenter to leadcenter distance (between component and tape) 5 + 0.5 / - 0.2 H0 Lead wire clinch height see table ± 0.5 H2 Component bottom to seating plane see table see table H3 Component top to seating plane see table max. T Total thinkness see table max. h H3 H2 d W2 H0 H 1 L W0 W1 W P0 P1 F D0 T1 Revision: 13-Nov-15 DIMENSIONS TOLERANCE t Document Number: 29070 3 For technical questions, contact: [email protected] THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 Legal Disclaimer Notice www.vishay.com Vishay Disclaimer ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other disclosure relating to any product. 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