2322 661 93056

2322 66. 9.... Vishay BCcomponents PTC Thermistors, Overload Protection For Telecommunication FEATURES PRIMARY PROTECTION (OPTIONAL) • • • • SECONDARY PROTECTION +θ PTC subscriber lines +θ PTC SUBSCRIBER LOOP INTERFACE CIRCUIT (SLIC) OR TRANSFORMER voltage clamp +θ +θ PTC • • • • CCB913 MDF Typical telephone line showing where PTC thermistors can be used for overcurrent protection. Wide resistance range in telecom area 4... 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 Good tracking over a wide temperature range for all matched or binned types UL1434 approved types available (XGPU2) Excellent stability over extended time All telecom PTCs are coated with a high temperature silicon lacquer (UL94V0) to protect them from any harsh environments and to improve their lifetime. APPLICATIONS • • • • DESCRIPTION Advanced developments in telephony equipment in recent years have radically altered the protection requirements for both exchange and subscriber equipment. The Vishay BCcomponents range of Positive Temperature Coefficient (PTC) thermistors includes devices specially designed to provide overcurrent 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 grey coated body. BC and R25 value. ELECTRICAL DATA AND ORDERING INFORMATION RESISTANCE R25 (Ω ) MATCHING Ω TOL (%) V MAX. (Vrms) NON-TRIP CURRENT Int (mA) at T (°C) TRIP CURRENT It (mA) at T (°C) MAX. TRIP TIME at 1A tt (s) I MAX. at V MAX. I MAX (A) APPLICATION AREA(4) CODE NUMBER 2322 ... ..... ±20 1.0 220 70 70 200 25 2.5 4.0 C.O. 661 93048(1) 25 ±20 1.0 230 100 70 250 25 3.0 2.0 MDF; ISDN 661 93147(1) 10 33 ±20 1.5 245 75 70 150 10 1.2 1.0 C.O. 661 93037 25 ±15 no 245 70 70 200 25 5.0 2.6 C.O. 661 93175(1)(3) ±20 no 245 140 55 270 25 8.0 1.6 T.E. 662 93081(1)(3) 16 10 ±20 no 245 140 55 270 25 8.0 2.0 T.E. 662 93074(1)(3) 1.0 250 100 40 220 25 1.0 1.6 MDF 661 93118 20 +10/−20 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) ±25 no 300 100 70 250 25 2.0 2.6 MDF; T.E. 661 93121(1) 16 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) ±20 1.0 600 50 70 140 25 1.0 1.0 C.O. 661 93135(1) 50 ±20 3.0 600 70 70 600 0 3.0 1.0 C.O. 661 93056(1) 35 25 ±20 0.5 600 70 70 170 25 2.5 2.0 C.O. 661 93139(1) ±20 0.5 600 70 70 170 25 5.0 2.0 C.O. 662 93129(1) 25 ±20 0.5 600 175 25 400 25 7.0 1.0 C.O. 662 93114(2) 10 10 ±20 no 600 175 25 400 25 7.0 1.0 T.E.; S.B. 662 93131(2) 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 Revision: 15-Oct-04 For technical questions contact: nlr.europe@vishay.com www.vishay.com 163 2322 66. 9.... Vishay BCcomponents PTC Thermistors, Overload Protection For Telecommunication 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. OVERCURRENT PROTECTION OF TELECOMMUNICATION LINES The PTC thermistor must protect the telephone line circuit against overcurrent which may be caused by the following examples: • Surges due to lightning strikes on or near to the line plant. • 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. 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 on page 1. However, even with primary line protection (usually a gas discharge tube), the PTC thermistor must fulfil severe requirements. 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 case of overcurrent due to short-term induction of alternating voltages, currents of several AMPs with voltages as high as 650 VRMS can be present for several seconds For standard high voltage applications, resistance values from 25 to 50 Ω are available. However, ISDN networks which carry high-frequency sound and vision, need lower line impedance. 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 to 600 VRMS range are available. 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. On request, Vishay BCcomponents can supply matched or binned PTC thermistors with R25 values matched to as close as 0.5 Ω. In the case of direct contact between the telephone line and a power line, the PTC thermistor must withstand very high PTC THERMISTORS IN BULK T D T D H3 H2 F L1 d CCB914 COMPONENT DIMENSIONS AND PACKAGING in millimeters D MAX. (MM) T MAX. (MM) H2 (MM) L1 (MM) H3 MAX. (MM) H0 (MM) 8.5 7.0 7.0 8.3 11 11 6.7 7.0 13.6 8.3 7.0 8.5 5.0 4.0 5.0 4.0 4.5 4.5 1.8 4.0 6.0 5.0 4.0 4.0 1.5 to 3.0 2.0 ±0.5 1.5 to 3 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 − − − − − − − − 20 ±4.0 20 ±3.0 − 4.1 ±0.5 11.5 9.8 10.0 11.0 15.5 15.5 − 9.8 18.6 10.3 10.0 11.5 16 18 16 18 16 16 − 18 − − 16 − www.vishay.com 164 CATALOG NUMBER 2322 ... ..... PACKAGING(1)(2) TYPE S.P.Q. P.Q. Taped on Reel Taped on Reel Taped on Reel Taped on Reel Taped on Reel Taped on Reel disc on tray Taped on Reel Bulk Bulk Taped on Reel Bulk 3,000 3,000 3,000 3,000 3,000 3,000 5,600 3,000 200 250 3,000 500 6,000 6,000 6,000 6,000 6,000 6,000 5,600 6,000 6,000 6,000 6,000 6,000 For technical questions contact: nlr.europe@vishay.com 661 93048 661 93147 661 93037 661 93175 662 93081 662 93074 661 93118 661 93148 663 93025 661 93078 661 93121 661 93124 Document Number: 29070 Revision: 15-Oct-04 2322 66. 9.... PTC Thermistors, Overload Protection For Telecommunication D MAX. (MM) T MAX. (MM) H2 (MM) L1 (MM) H3 MAX. (MM) H0 (MM) 8.5 8.5 8.0 8.5 10.5 13 13 4.0 4.0 5.0 4.0 5.0 5.5 5.5 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 − 4.1 ±0.5 − − − 20 min. 20 min. 11.5 11.5 11.0 11.0 12.6 18.0 18.0 16 − 16 16 16 − − Vishay BCcomponents CATALOG NUMBER 2322 ... ..... PACKAGING(1)(2) TYPE S.P.Q. P.Q. Taped on Reel Bulk Taped on Reel Taped on Reel Taped on Reel Bulk Bulk 3,000 500 3,000 3,000 3,000 200 200 6,000 6,000 6,000 6,000 6,000 6,000 6,000 661 93146 661 93135 661 93056 661 93139 662 93129 662 93114 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 D ∆h ∆p ∆h H3 0 0.2 H2 H1 15 o 5 o d H0 W2 L W1 W0 W MBE473 D0 P1 P0 F t T TAPE AND REEL ACCORDING TO IEC60286-2 DIMENSIONS in millimeters SYMBOL PARAMETER DIMENSIONS TOLERANCE D body diameter see table max. T total maximum thickness see table max. d lead diameter 0.6 ±10% ∅ < 12 mm 12.7 ±1 ∅ ≥ 12 mm 25.4 ±2 feed hole pitch 12.7 ±0.3 REMARKS pitch between thermistors: P P0 Document Number: 29070 Revision: 15-Oct-04 For technical questions contact: nlr.europe@vishay.com cumulative pitch error ±1 mm/20 pitches www.vishay.com 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 P1 feed hole centre to lead centre 3.81 ±0.7 guaranteed between component and tape ∆h component alignment 0 ±1.3 F lead to lead distance 5 +0.6 to −0.1 ∆h component alignment 0 ±2 W tape width 18 +1 to −0.5 W0 hold down tape width ≥12.3 − W1 hole position 9 ±0.5 W2 hold down tape position ≤3.0 − H1 component height H2 component body to seating plane H3 component top to seating plane H0 lead-wire clinch height see table ±0.5 D0 feed hole diameter 4 ±0.2 t total tape thickness ≤0.9 − L length of snipped lead ≤11 − guaranteed between component and tape see table 4 ±1 see table with cardboard tape 0.5 ±0.1 mm REEL SPECIFICATIONS in millimeters REEL DIMENSIONS in millimeters DIAMETER ∅ W1 W2 MAX.