ptctl www.vishay.com vishay bccomponents revision: 13-nov-15 1 document number: 29070 for technical questions, contact: nlr@vishay.com 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 ptc thermistors, overload protection for telecommunication features ? wide resistance range in telecom area from 4 to 70 ? 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 th ermistors (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: fo r definitions of compliance please see www.vishay.com/doc?99912 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 r 25 value notes ? all types pass itu-t k20-21-45 telecomm unication protection recommendation (1) ul 1434 approved types and compatible with ul1459 and gr1089 (2) mdf: main distribution frame; c.o.: ce ntral office switching; t.e.: subscriber terminal equipment; s.b.: set-top box quick reference data parameter value unit maximum voltage (rms or dc) 220 to 600 v rms maximum holding current (i nt ) 100 to 175 ma resistance at 25 c ( r 25 )8 to 50 tolerance on r 25 value 15 to 25 % maximum overload current i ol 0.6 to 10.0 a tripping time at 1 a 1 to 40 s operating temperature range at max. voltage 0 to 70 (95) c electrical data and ordering information resistance matching ( ) v max. (v rms ) non-trip current trip current max. trip time at 1 a? i max. ?at v max. application area (2) ordering part numbers r 25 ( ) tol. (%) i nt (ma) at?t (c) i t (ma) at?t (c) t max. (s) i max. (a) 25 20 1.0 220 70 70 200 25 2.5 4.0 c.o. ptctl4mr250gte 10 20 1.0 230 100 70 250 25 3.0 2.0 mdf; isdn ptctl3mr100gte 25 15 no 245 70 70 200 25 5.0 2.6 c.o. ptctl4nr250gte 16 20 no 245 140 55 270 25 8.0 1.6 t.e. ptctl6nr160gte 10 20 no 245 140 55 270 25 8.0 2.0 t.e. ptctl6nr100gte 25 20 1.0 250 70 70 175 25 1.3 3.2 mdf; c.o. ptctl3mr250hte 10 20 no 250 100 70 450 0 40.0 10.0 t.e. ptctl8nr100hbe 8 25 0.5 285 135 95 400 25 6.0 0.6 mdf; isdn ptctl4mr080jbe 16 25 no 300 100 70 250 25 2.0 2.6 mdf; t.e. ptctl3nr160kte 10 20 no 350 100 70 270 25 4.0 1.0 t.e.; s.b. ptctl4nr100lbe 10 20 1.0 350 100 70 270 25 4.0 1.0 c.o. ptctl4mr100lte 50 20 1.0 600 50 70 140 25 1.0 1.0 c.o. ptctl4mr500sbe 35 20 3.0 600 70 70 600 0 3.0 1.0 c.o. PTCTL4MR350STE 25 20 0.5 600 70 70 170 25 2.5 2.0 c.o. ptctl4mr250ste 25 20 0.5 600 70 70 170 25 5.0 2.0 c.o. ptctl6mr250ste 10 20 0.5 600 175 25 400 25 7.0 1.0 c.o. ptctl7mr100sbe (1) 10 20 no 600 175 25 400 25 7.0 1.0 t.e.; s.b. ptctl7nr100sbe (1)
ptctl www.vishay.com vishay bccomponents revision: 13-nov-15 2 document number: 29070 for technical questions, contact: nlr@vishay.com 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 overcurrent protection of telecommunication lines the ptc thermistor must prote ct 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. ? short-term induction of alternating voltages from adjacent power lines or railway system s, 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 fig. 1. however, even with pr imary line protection (usually a gas discharge tube), the ptc th ermistor must fulfil severe requirements. surge pulses of up to 2 kv can occur and in order to withstand short-term power in duction the ptc thermistor must withstand high voltag es. if the line has primary protection a 220 v to 300 v ptc thermistor is adequate. without primary protection, howe ver, a 600 v ptc device is necessary. vishay bccomponents manufacturers a range of ptc thermistors (see electrical data and ordering information table) coveri ng 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 ma ins 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 char acteristic of the thermistor must have a very steep slop e and the ceramic must be extremely homogeneous. in case of overcurrent due to short-term induction of alternating voltages, current s of several amperes with voltages as high as 650 v rms can be present for several seconds. for standard high voltage app lications, resistance values from 25 to 50 are available. however, isdn networks which carry high-frequency so und and vision, need lower line impedance. telecommunication designers are therefore demanding high voltage thermistors with much lower r 25 values, which places even greater demands on the manufacture of ptc thermistors. for these applic ations ptc thermistors which have a r 25 value of 10 with voltages in the 300 v rms to 600 v rms 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 resi stors. for good line balance it is important that the thermi stor and resistor pairs are matched. fig. 1 - typical telephone line showing where ptc thermistors can be used for overcurrent protection. subscriber loop interface circuit (slic) or transformer voltage clamp ptc ptc mdf secondary protection primary protection (optional) subscriber lines + ptc + + +
ptctl www.vishay.com vishay bccomponents revision: 13-nov-15 3 document number: 29070 for technical questions, contact: nlr@vishay.com 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 ptc thermistors in bulk 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 component dimensions (in mm) d max. t max. h 2 l 1 h 3 max. h 0 packaging (1)(2) ordering part number type spq 8.5 5.0 1.5?to?3.0 - 11.5 16 taped on reel 1500 ptctl4mr250gte 7.0 4.0 2.0? 0.5 - 9.8 18 taped on reel 1500 ptctl3mr100gte 8.3 4.0 1.5?to?3.0 - 11.0 18 taped on reel 1500 ptctl4nr250gte (3) 11 4.5 4.0? 1.0 - 15.5 16 taped on reel 1500 ptctl6nr160gte 11 4.5 4.0? 1.0 - 15.5 16 taped on reel 1500 ptctl6nr100gte (3) 7.0 4.0 2.0? 0.5 - 9.8 18 taped on reel 1500 ptctl3mr250hte 13.6 6.0 4.0? 1.0 20? 4.0 18.6 - bulk 200 ptctl8nr100hbe (3) 8.3 5.0 1.5? 0.5 20? 3.0 10.3 - bulk 250 ptctl4mr080jbe 7.0 4.0 2.5? 0.5 - 10.0 16 taped on reel 1500 ptctl3nr160kte 8.5 4.0 2.5? 0.5 4.1? 0.5 11.5 - bulk 500 ptctl4nr100lbe 8.5 4.0 2.5? 0.5 - 11.5 16 taped on reel 1500 ptctl4mr100lte 8.5 4.0 2.5? 0.5 4.1? 0.5 11.5 - bulk 500 ptctl4mr500sbe 8.0 5.0 2.5? 0.5 - 11.0 16 taped on reel 1500 PTCTL4MR350STE 8.5 4.0 2.0? 0.5 - 11.0 16 taped on reel 1500 ptctl4mr250ste 10.5 5.0 2.0? 0.5 - 12.6 16 taped on reel 1500 ptctl6mr250ste 13 5.5 4.0? 1.0 20?min. 18.0 - bulk 200 ptctl7mr100sbe 13 5.5 4.0? 1.0 20?min. 18.0 - bulk 200 ptctl7nr100sbe t d d f l 1 h 2 h 3 ? p t h 2 h 3 ? h l d p 0 p 1 fd 0 w 0 w 2 w 1 w p t 1 t h 1 h 0 ? p d ? h tape and reel according to iec 60286-2 (in mm) symbol parameter dimensions tolerance d body diameter see table max. d lead diameter 0.6 0.05 p pitch between thermistors 12.7 1 p 0 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.
legal disclaimer notice www.vishay.com vishay revision: 13-jun-16 1 document number: 91000 disclaimer ? all product, product specifications and data ar e subject to change with out notice to improve reliability, function or design or otherwise. vishay intertechnology, inc., its affiliates, agents, and employee s, and all persons acting on it s or their behalf (collectivel y, vishay), disclaim any and all liability fo r any errors, inaccuracies or incompleteness contained in any datasheet or in any o ther disclosure relating to any product. vishay makes no warranty, representation or guarantee regarding the suitability of th e products for any particular purpose or the continuing production of any product. to the maximum extent permitted by applicable law, vi shay disclaims (i) any and all liability arising out of the application or use of any product , (ii) any and all liability, including without limitation specia l, consequential or incidental damages, and (iii) any and all implied warranties, includ ing warranties of fitness for particular purpose, non-infringement and merchantability. statements regarding the suitability of products for certain types of applicatio ns are based on vishays knowledge of typical requirements that are often placed on vishay products in generic applications. such statements are not binding statements about the suitability of products for a particular applic ation. it is the customers responsibility to validate tha t a particular product with the prope rties described in the product sp ecification is suitable for use in a particular application. parameters provided in datasheets and / or specifications may vary in different ap plications and perfor mance may vary over time. all operating parameters, including ty pical parameters, must be va lidated for each customer application by the customer s technical experts. product specifications do not expand or otherwise modify vishays term s and conditions of purchase, including but not limited to the warranty expressed therein. except as expressly indicated in writing, vishay products are not designed for use in medical, life-saving, or life-sustaining applications or for any other application in which the failure of the vishay product could result in personal injury or death. customers using or selling vishay product s not expressly indicated for use in such applications do so at their own risk. please contact authorized vishay personnel to obtain writ ten terms and conditions rega rding products designed for such applications. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is gran ted by this document or by any conduct of vishay. product names and markings noted herein may be trademarks of their respective owners.
|
