2322 66. 9.... Vishay BCcomponents PTC Thermistors, Overload Protection For Telecommunication FEATURES PRIMARY SECONDARY • Wide resistance range in telecom area 4... to 70 Ω PROTECTION PROTECTION (OPTIONAL) • Fast protection against power contact faults +θ +θ • Withstand high overload currents of up to 10 A • High voltage withstanding capabilities for the larger sized PTC PTC SUBSCRIBER LOOP thermistors INTERFACE subscriber voltage CIRCUIT lines clamp • Good tracking over a wide temperature range for all (SLIC) OR matched or binned types TRANSFORMER +θ +θ • UL1434 approved types available (XGPU2) PTC • Excellent stability over extended time CCB913 MDF • All telecom PTCs are coated with a high temperature silicon lacquer (UL94V0) to protect them from any harsh environments and to improve their lifetime. Typical telephone line showing where PTC thermistors can be used for overcurrent protection. APPLICATIONS • Main Distribution Frame (MDF) • Central Office Switching (C.O.) DESCRIPTION • Subscriber Terminal Equipment (T.E.) Advanced developments in telephony equipment in recent • Set-top box (S.B.). years have radically altered the protection requirements for both exchange and subscriber equipment. The Vishay MARKING BCcomponents range of Positive Temperature Coefficient Clear marking on a grey coated body. (PTC) thermistors includes devices specially designed to provide overcurrent protection. BC and R25 value. ELECTRICAL DATA AND ORDERING INFORMATION MAX. I MAX. NON-TRIP TRIP RESISTANCE TRIP CURRENT at CODE CURRENT TIME MATCHING V APPLICATION MAX. V MAX. NUMBER at 1A (4) Ω (Vrms) AREA 2322 ... ..... R TOL I at T I at T t I 25 nt t t MAX (Ω) (%) (mA) (°C) (mA) (°C) (s) (A) (1) 25 ±20 1.0 220 70 70 200 25 2.5 4.0 C.O. 661 93048 (1) 10 ±20 1.0 230 100 70 250 25 3.0 2.0 MDF; ISDN 661 93147 33 ±20 1.5 245 75 70 150 10 1.2 1.0 C.O. 661 93037 (1)(3) 25 ±15 no 245 70 70 200 25 5.0 2.6 C.O. 661 93175 (1)(3) 16 ±20 no 245 140 55 270 25 8.0 1.6 T.E. 662 93081 (1)(3) 10 ±20 no 245 140 55 270 25 8.0 2.0 T.E. 662 93074 20 +10/−20 1.0 250 100 40 220 25 1.0 1.6 MDF 661 93118 (1) 25 ±20 1.0 250 70 70 175 25 1.3 3.2 MDF; C.O. 661 93148 (1) 10 ±20 no 250 100 70 450 0 40.0 10.0 T.E. 663 93025 (1) 8 ±25 0.5 285 135 95 400 25 6.0 0.6 MDF; ISDN 661 93078 (1) 16 ±25 no 300 100 70 250 25 2.0 2.6 MDF; T.E. 661 93121 (1) 10 ±20 no 350 100 70 270 25 4.0 1.0 T.E.; S.B. 661 93124 (1) 10 ±20 1.0 350 100 70 270 25 4.0 1.0 C.O. 661 93146 (1) 50 ±20 1.0 600 50 70 140 25 1.0 1.0 C.O. 661 93135 (1) 35 ±20 3.0 600 70 70 600 0 3.0 1.0 C.O. 661 93056 (1) 25 ±20 0.5 600 70 70 170 25 2.5 2.0 C.O. 661 93139 (1) 25 ±20 0.5 600 70 70 170 25 5.0 2.0 C.O. 662 93129 (2) 10 ±20 0.5 600 175 25 400 25 7.0 1.0 C.O. 662 93114 (2) 10 ±20 no 600 175 25 400 25 7.0 1.0 T.E.; S.B. 662 93131 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. Document Number: 29070 For technical questions contact: nlr.europe@vishay.com www.vishay.com Revision: 15-Oct-04 163 2322 66. 9.... Vishay BCcomponents PTC Thermistors, Overload Protection For Telecommunication OVERCURRENT PROTECTION OF inrush power at normal mains voltage. Under such conditions, overload currents of up to 10 A on a 230 V mains TELECOMMUNICATION LINES could occur for up to several hours. To handle this power, the The PTC thermistor must protect the telephone line circuit resistance/temperature characteristic of the thermistor must against overcurrent which may be caused by the following have a very steep slope and the ceramic must be extremely examples: homogeneous. • Surges due to lightning strikes on or near to the line plant. In case of overcurrent due to short-term induction of • Short-term induction of alternating voltages from adjacent alternating voltages, currents of several AMPs with voltages power lines or railway systems, usually caused when these as high as 650 V can be present for several seconds RMS lines or systems develop faults. For standard high voltage applications, resistance values • Direct contact between telephone lines and power lines. from 25 to 50 Ω 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 Telecommunication designers are therefore demanding high on page 1. However, even with primary line protection voltage thermistors with much lower R values, which 25 (usually a gas discharge tube), the PTC thermistor must fulfil places even greater demands on the manufacture of PTC severe requirements. thermistors. For these applications PTC thermistors which Surge pulses of up to 2 kV can occur and in order to have a R value of 10 Ω with voltages in the 25 withstand short-term power induction the PTC thermistor 300 to 600 V range are available. RMS must withstand high voltages. If the line has primary In a typical telephone line application, two PTC thermistors protection a 220 V to 300 V PTC thermistor is adequate. are used, one each for the tip and ring (or A and B) wire Without primary protection, however, a 600 V PTC device is together with their series resistors. For good line balance it is necessary. Vishay BCcomponents manufacturers a range of important that the thermistor and resistor pairs are matched. PTC thermistors (see Electrical Data and Ordering Information Table ) covering both requirements. On request, Vishay BCcomponents can supply matched or binned PTC thermistors with R values matched to as close In the case of direct contact between the telephone line and 25 as 0.5 Ω. a power line, the PTC thermistor must withstand very high PTC THERMISTORS IN BULK D T D T H 3 H 2 F L 1 d CCB914 COMPONENT DIMENSIONS AND PACKAGING in millimeters CATALOG D T H (1)(2) 3 PACKAGING NUMBER H L H 2 1 0 MAX. MAX. MAX. 2322 ... ..... (MM) (MM) (MM) (MM) (MM) (MM) TYPE S.P.Q. P.Q. 8.5 5.0 1.5 to 3.0 − 11.5 16 Taped on Reel 3,000 6,000 661 93048 7.0 4.0 2.0 ±0.5 − 9.8 18 Taped on Reel 3,000 6,000 661 93147 7.0 5.0 1.5 to 3 − 10.0 16 Taped on Reel 3,000 6,000 661 93037 8.3 4.0 1.5 to 3.0 − 11.0 18 Taped on Reel 3,000 6,000 661 93175 11 4.5 4.0 ±1.0 − 15.5 16 Taped on Reel 3,000 6,000 662 93081 11 4.5 4.0 ±1.0 − 15.5 16 Taped on Reel 3,000 6,000 662 93074 6.7 1.8 −− − − disc on tray 5,600 5,600 661 93118 7.0 4.0 2.0 ±0.5 − 9.8 18 Taped on Reel 3,000 6,000 661 93148 13.6 6.0 4.0 ±1.0 20 ±4.0 18.6 − Bulk 200 6,000 663 93025 8.3 5.0 1.5 ±0.5 20 ±3.0 10.3 − Bulk 250 6,000 661 93078 7.0 4.0 2.5 ±0.5 − 10.0 16 Taped on Reel 3,000 6,000 661 93121 8.5 4.0 2.5 ±0.5 4.1 ±0.5 11.5 − Bulk 500 6,000 661 93124 www.vishay.com For technical questions contact: nlr.europe@vishay.com Document Number: 29070 164 Revision: 15-Oct-04 2322 66. 9.... PTC Thermistors, Overload Protection Vishay BCcomponents For Telecommunication CATALOG D T H (1)(2) 3 PACKAGING NUMBER H L H 2 1 0 MAX. MAX. MAX. 2322 ... ..... (MM) (MM) (MM) (MM) (MM) (MM) TYPE S.P.Q. P.Q. 8.5 4.0 2.5 ±0.5 − 11.5 16 Taped on Reel 3,000 6,000 661 93146 8.5 4.0 2.5 ±0.5 4.1 ±0.5 11.5 − Bulk 500 6,000 661 93135 8.0 5.0 2.5 ±0.5 − 11.0 16 Taped on Reel 3,000 6,000 661 93056 8.5 4.0 2.0 ±0.5 − 11.0 16 Taped on Reel 3,000 6,000 661 93139 10.5 5.0 2.0 ±0.5 − 12.6 16 Taped on Reel 3,000 6,000 662 93129 13 5.5 4.0 ±1.0 20 min. 18.0 − Bulk 200 6,000 662 93114 13 5.5 4.0 ±1.0 20 min. 18.0 − Bulk 200 6,000 662 93131 Notes 1. Taped in accordance with “IEC 60286-2”. 2. Naked disc ceramic for substrate mounting, available on request. 3. Insulated version is also available. PTC THERMISTORS ON TAPE ON REEL P T ∆p ∆p ∆h ∆h D H 3 0 0.2 H 2 oo H 15 5 1 d H W 0 2 L W 1 W W 0 MBE473 D 0 P P F 0 1 t T TAPE AND REEL ACCORDING TO IEC60286-2 DIMENSIONS in millimeters SYMBOL PARAMETER DIMENSIONS TOLERANCE REMARKS see table D body diameter max. T total maximum thickness see table max. d lead diameter 0.6 ±10% pitch between thermistors: P ∅ < 12 mm 12.7 ±1 ∅ ≥ 12 mm 25.4 ±2 P feed hole pitch 12.7 ±0.3 cumulative pitch error ±1 mm/20 pitches 0 Document Number: 29070 For technical questions contact: nlr.europe@vishay.com www.vishay.com Revision: 15-Oct-04 165 2322 66. 9.... Vishay BCcomponents PTC Thermistors, Overload Protection For Telecommunication TAPE AND REEL ACCORDING TO IEC60286-2 DIMENSIONS in millimeters SYMBOL PARAMETER DIMENSIONS TOLERANCE REMARKS P feed hole centre to lead centre 3.81 ±0.7 guaranteed between component and tape 1 ∆h component alignment 0 ±1.3 F lead to lead distance 5 +0.6 to −0.1 guaranteed between component and tape ∆h component alignment 0 ±2 W tape width 18 +1 to −0.5 W hold down tape width ≥12.3 − 0 W hole position 9 ±0.5 1 W hold down tape position ≤3.0 − 2 H component height see table 1 H component body to seating plane 4 ±1 2 H component top to seating plane see table 3 H lead-wire clinch height see table ±0.5 0 D feed hole diameter 4 ±0.2 0 t total tape thickness ≤0.9 − with cardboard tape 0.5 ±0.1 mm L length of snipped lead ≤11 − REEL SPECIFICATIONS in millimeters REEL DIMENSIONS in millimeters W 2 DIAMETER ∅ W 1 MAX. <12 42 ±156 12 46 ±160 3 18 +1 356 30 77 85.6 92 −0 max. 22.5 CCB614 W 1 W 2 www.vishay.com For technical questions contact: nlr.europe@vishay.com Document Number: 29070 166 Revision: 15-Oct-04