2381 66. 9..../PTCTL..R.....E Vishay BCcomponents PTC Thermistors, Overload Protection For Telecommunication FEATURES PRIMARY SECONDARY Wide resistance range in telecom area from 4 PROTECTION PROTECTION to 70 (OPTIONAL) Fast protection against power contact faults + + Withstand high overload currents of up to 10 A PTC PTC SUBSCRIBER High voltage withstanding capabilities for the LOOP INTERFACE subscriber voltage larger sized thermistors (up to 600 V) CIRCUIT lines clamp (SLIC) Good tracking over a wide temperature range for OR all matched or binned thermistors (matching at TRANSFORMER + + 85 C 2 x matching at 25 C) PTC UL1434 approved types available (XGPU2) MDF 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 Typical telephone line showing where PTC thermistors Compliant to RoHS directive 2002/95/EC and in can be used for overcurrent protection. accordance to WEEE 2002/96/EC DESCRIPTION APPLICATIONS Advanced developments in telephone equipment in recent Over-temperature/over-load protection: years have radically altered the protection requirements for Main Distribution Frame (MDF) both exchange and subscriber equipment. The Vishay Central Office Switching (C.O.) BCcomponents range of Positive Temperature Coefficient Subscriber Terminal Equipment (T.E.) (PTC) thermistors includes devices specially designed to Set-top box (S.B.) provide overcurrent protection in specific telecom applications. MARKING Clear marking on a grey coated body BC and R25 value ELECTRICAL DATA AND ORDERING INFORMATION MAX. I MAX. NON-TRIP TRIP TRIP RESISTANCE at CATALOG NUMBER MATCHING V CURRENT CURRENT TIME APPLICATION MAX. V MAX. (4) () (V ) at 1 A AREA RMS R TOL. Int at T I at T t I 25 t MAX. MAX. 12NC SAP CODING () (%) (mA) (C) (mA) (C) (s) (A) (1) (1) 25 20 1.0 220 70 70 200 25 2.5 4.0 C.O. 2381 661 93048 PTCTL4MR250GTE (1) (1) 10 20 1.0 230 100 70 250 25 3.0 2.0 MDF ISDN 2381 661 93147 PTCTL3MR100GTE 33 20 1.5 245 75 70 150 10 1.2 1.0 C.O. 2381 661 93037 PTCTL3MR330GTE (1) (3) (1) (3) 25 15 no 245 70 70 200 25 5.0 2.6 C.O. 2381 661 93175 PTCTL4NR250GTE (1) (3) (1) (3) 16 20 no 245 140 55 270 25 8.0 1.6 T.E. 2381 662 93081 PTCTL6NR160GTE (1) (3) (1) (3) 10 20 no 245 140 55 270 25 8.0 2.0 T.E. 2381 662 93074 PTCTL6NR100GTE (1) (1) 25 20 1.0 250 70 70 175 25 1.3 3.2 MDF C.O. 2381 661 93148 PTCTL3MR250HTE (1) (1) 10 20 no 250 100 70 450 0 40.0 10.0 T.E. 2381 663 93025 PTCTL8NR100HBE (1) (1) 8 25 0.5 285 135 95 400 25 6.0 0.6 MDF ISDN 2381 661 93078 PTCTL4MR080JBE (1) (1) 16 25 no 300 100 70 250 25 2.0 2.6 MDF T.E. 2381 661 93121 PTCTL3NR160KTE (1) (1) 10 20 no 350 100 70 270 25 4.0 1.0 T.E. S.B. 2381 661 93124 PTCTL4NR100LBE (1) (1) 10 20 1.0 350 100 70 270 25 4.0 1.0 C.O. 2381 661 93146 PTCTL4MR100LTE (1) (1) 50 20 1.0 600 50 70 140 25 1.0 1.0 C.O. 2381 661 93135 PTCTL4MR500SBE (1) (1) 35 20 3.0 600 70 70 600 0 3.0 1.0 C.O. 2381 661 93056 PTCTL4MR350STE (1) (1) 25 20 0.5 600 70 70 170 25 2.5 2.0 C.O. 2381 661 93139 PTCTL4MR250STE (1) (1) 25 20 0.5 600 70 70 170 25 5.0 2.0 C.O. 2381 662 93129 PTCTL6MR250STE (2) (2) 10 20 0.5 600 175 25 400 25 7.0 1.0 C.O. 2381 662 93114 PTCTL7MR100SBE (2) (2) 10 20 no 600 175 25 400 25 7.0 1.0 T.E. S.B. 2381 662 93131 PTCTL7NR100SBE Notes (1) These types pass ITU-T K20-21-45 edition 2003 telecommunication protection recommendation (2) UL 1434 approved types and compatible with UL1459 and GR1089 (3) These types are compatible with FTCSE 131 (4) MDF: Main Distribution Frame C.O.: Central Office Switching T.E.: Subscriber Terminal Equipment S.B.: Set-top Box www.vishay.com For technical questions, contact: nlr vishay.com Document Number: 29070 34 Revision: 25-Jun-092381 66. 9..../PTCTL..R.....E PTC Thermistors, Overload Protection Vishay BCcomponents For Telecommunication OVERCURRENT PROTECTION OF TELECOMMUNICATION LINES The PTC thermistor must protect the telephone line circuit could occur for up to several hours. To handle this power, the against overcurrent which may be caused by the following resistance/temperature characteristic of the thermistor must examples: have a very steep slope and the ceramic must be extremely homogeneous. Surges due to lightning strikes on or near to the line plant. Short-term induction of alternating voltages from adjacent In case of overcurrent due to short-term induction of power lines or railway systems, usually caused when these alternating voltages, currents of several AMPs with voltages lines or systems develop faults. as high as 650 V can be present for several seconds RMS Direct contact between telephone lines and power lines. For standard high voltage applications, resistance values from 25 to 50 are available. However, ISDN networks To provide good protection under such conditions a PTC which carry high-frequency sound and vision, need lower line thermistor is connected in series with each line, usually as impedance. secondary protection see Typical Telephone Line drawing on page 1. However, even with primary line protection Telecommunication designers are therefore demanding high (usually a gas discharge tube), the PTC thermistor must fulfil voltage thermistors with much lower R values, which 25 severe requirements. places even greater demands on the manufacture of PTC Surge pulses of up to 2kV can occur and in order to thermistors. For these applications PTC thermistors which withstand short-term power induction the PTC thermistor have a R value of 10 with voltages in the 300 V to 25 RMS must withstand high voltages. If the line has primary 600 V range are available. RMS protection a 220 V to 300 V PTC thermistor is adequate. In a typical telephone line application, two PTC thermistors Without primary protection, however, a 600 V PTC device is are used, one each for the tip and ring (or A and B) wire necessary. Vishay BCcomponents manufacturers a range of together with their series resistors. For good line balance it is PTC thermistors (seeElectrical Data and Ordering important that the thermistor and resistor pairs are matched. Information Table) covering both requirements. On request, Vishay BCcomponents can supply matched or In the case of direct contact between the telephone line and binned PTC thermistors with R values matched to as close 25 a power line, the PTC thermistor must withstand very high as 0.5 . inrush power at normal mains voltage. Under such conditions, overload currents of up to 10 A on a 230 V mains PTC THERMISTORS IN BULK D T H 3 H 2 F L 1 d COMPONENT DIMENSIONS (1) (2) D T H PACKAGING CATALOG NUMBER 3 H L H 2 1 0 MAX. MAX. MAX. (mm) (mm) (mm) TYPE SPQ 12NC SAP CODING (mm) (mm) (mm) 8.5 5.0 1.5 to 3.0 - 11.5 16 Taped on reel 1500 2381 661 93048 PTCTL4MR250GTE 7.0 4.0 2.0 0.5 - 9.8 18 Taped on reel 1500 2381 661 93147 PTCTL3MR100GTE 7.0 5.0 1.5 to 3 - 10.0 16 Taped on reel 1500 2381 661 93037 PTCTL3MR330GTE (3) (3) 8.3 4.0 1.5 to 3.0 - 11.0 18 Taped on reel 1500 2381 661 93175 PTCTL4NR250GTE 11 4.5 4.0 1.0 - 15.5 16 Taped on reel 1500 2381 662 93081 PTCTL6NR160GTE (3) (3) 11 4.5 4.0 1.0 - 15.5 16 Taped on reel 1500 2381 662 93074 PTCTL6NR100GTE 7.0 4.0 2.0 0.5 - 9.8 18 Taped on reel 1500 2381 661 93148 PTCTL3MR250HTE (3) (3) 13.6 6.0 4.0 1.0 20 4.0 18.6 - Bulk 200 2381 663 93025 PTCTL8NR100HBE 8.3 5.0 1.5 0.5 20 3.0 10.3 - Bulk 250 2381 661 93078 PTCTL4MR080JBE 7.0 4.0 2.5 0.5 - 10.0 16 Taped on reel 1500 2381 661 93121 PTCTL3NR160KTE Document Number: 29070 For technical questions, contact: nlr vishay.com www.vishay.com Revision: 25-Jun-09 35