Fusible, Non-Flammable Resistors

Transcription

1 NFR25/25H Fusible, Non-Flammable Resisors A homogenous film of meal alloy is deposied on a high grade ceramic body. Afer a helical groove has been cu in he resisive layer, inned connecing wires of elecrolyic copper are welded o he end-caps. The resisors are coaed wih a grey, flame reardan lacquer which provides elecrical, mechanical, and climaic proecion. The encapsulaion is resisan o all cleaning solvens in accordance wih MIL-STD-22E, mehod 25, and IEC FEATURES Overload proecion wihou risk of fire Wide range of overload currens (refer Fusing Characerisics graphs) Lead (Pb)-free solder conacs Pure in plaing provides compaibiliy wih lead (Pb)-free and lead conaining soldering processes Compaible wih Resricion of he use of Hazardous Subsances (RoHS) direcive 22/95/EC (issue 24) APPLICATIONS Audio Video TECHNICAL SPECIFICATIONS DESCRIPTION VALUE NFR25 NFR25H Resisance Range ().22 Ω o 5 kω Resisance Tolerance and Series ± 5 %; E24 series Maximum Dissipaion a T amb =7 C.33 W.5 W Thermal Resisance R h 24 K/W 5 K/W Temperaure Coefficien:.22 Ω R 4.7 Ω ± 2 x -6 /K ± 2 x -6 /K 4.7 Ω < R 5 Ω ± 2 x -6 /K ± x -6 /K 5 Ω < R 5 kω ± x -6 /K ± x -6 /K Maximum Permissible Volage (DC or RMS) 25 V 35 V Basic Specificaions IEC 65- and 65-2 Climaic Caegory (IEC 668) 55/55/56 Sabiliy Afer: Load ΔR max.: ± ( % R +.5 Ω) Climaic Tess ΔR max.: ± ( % R +.5Ω) Soldering ΔR max.: ± (.25 % R +.5Ω) Noes: () Ohmic values (oher han resisance range) are available on reques R value is measured wih probe disance of 24 ± mm using 4-erminal mehod 2NC INFORMATION The resisors have a 2-digi numeric code saring wih 23 The subsequen 7 digis indicae he resisor ype and packaging The remaining 3 digis indicae he resisance values: The firs 2 digis indicae he resisance value The las digi indicaes he resisance decade Las Digi of 2NC Indicaing Resisance Decade RESISTANCE DECADE LAST DIGIT.22 o.9 Ω 7 o9.ω 8 o 9 Ω 9 o 9 Ω o9.kω 2 o 5 kω 3 2NC Example The 2NC for a NFR25 resisor wih value 75 Ω, supplied on a bandolier of unis in ammopack is: For echnical quesions, conac: filmresisors.leaded@vishay.com Documen Number: Revision: 2-Feb-8

2 Fusible, Non-Flammable Resisors NFR25/25H 2NC - resisor ype and packaging TYPE ORDERING CODE BANDOLIER IN AMMOPACK BANDOLIER ON REEL RADIAL TAPED STRAIGHT LEADS STRAIGHT LEADS 4 UNITS UNITS 5 UNITS 5 UNITS NFR NFR25H PART NUMBER AND PRODUCT DESCRIPTION PART NUMBER: NFR25227JA N F R J A MODEL/SIZE SPECIAL CHARACTER TCR/MATERIAL VALUE TOLERANCE PACKAGING () SPECIAL NFR25 NFR25H = Neural Z = Value overflow (Special) PRODUCT DESCRIPTION: NFR25 5 % A R22 = Sandard 3 digi value digi muliplier MULTIPLIER 7 = * -3 8 = * -2 9 = * - = * = * 2 = * 2 J = ± 5 % NFR25 5 % A R22 MODEL/SIZE TOLERANCE PACKAGING () RESISTANCE VALUE NFR25 NFR25H ± 5 % N4 A5 A R5 K = kω 4R7 = 4.7 Ω Noes: () Please refer o able PACKAGING for deails. The PART NUMBER is shown o faciliae he inroducion of a unified par numbering sysem for ordering producs. N4 A5 A R5 The 2 digis are used for all special pars. = Sandard PACKAGING CODE PIECES DESCRIPTION MODEL/SIZE N4 4 Bandolier in ammopack radial aped A5 5 Bandolier in ammopack sraigh leads A Bandolier in ammopack sraigh leads NFR25, NFR25H R5 5 Bandolier on reel sraigh leads Documen Number: For echnical quesions, conac: filmresisors.leaded@vishay.com Revision: 2-Feb-8 27

3 NFR25/25H Fusible, Non-Flammable Resisors DIMENSIONS L Ø d L 2 Ouline Ø D DIMENSIONS - resisor ypes and relevan physical dimensions TYPE Ø D max. L max. L 2 max. Ø d NFR25 NFR25H ±.5 MASS PER UNITS TYPE MASS (g) NFR25 2. NFR25H 2. OUTLINES The lengh of he body (L ) is measured by insering he leads ino holes of wo idenical gauge plaes and moving hese plaes parallel o each oher unil he resisor body is clamped wihou deformaion ( IEC publicaion 6294 ). MARKING The nominal resisance and olerance are marked on he resisor using four coloured bands in accordance wih IEC publicaion 662 Color codes for fixed resisors. For ease of recogniion a fifh ring is added, which is viole for ype NFR25 and whie for ype NFR25H. FUNCTIONAL PERFORMANCE PRODUCT CHARACTERIZATION Sandard values of nominal resisance are aken from he E24 series for resisors wih a olerance of ± 5 %. The values of he E24 series are in accordance wih IEC publicaion 663. LIMITING VALUES TYPE LIMITING VOLTAGE () (V) LIMITING POWER (W) NFR NFR25H 35.5 Noe: () The maximum volage ha may be coninuously applied o he resisor elemen, see IEC publicaion 65-. The maximum permissible ho-spo emperaure is 55 C. For echnical quesions, conac: filmresisors.leaded@vishay.com Documen Number: Revision: 2-Feb-8

4 Fusible, Non-Flammable Resisors NFR25/25H The power ha he resisor can dissipae depends on he operaing emperaure. P max. (% P raed ) The resisors will fuse wihou he risk of fire and wihin an indicaed range of overload. Fusing means ha he resisive value of he resisor increases a leas imes. The fusing characerisic is measured under consan volage Maximum dissipaion (P max. ) in percenage of raed power as a funcion of he ambien emperaure (T amb ) Deraing T amb ( C) P overload (W) NFR25 This graph is based on measured daa which may deviae according o he applicaion. Fusing Characerisics: Ω Poverload (W) Poverload (W) NFR25 This graph is based on measured daa which may deviae according o he applicaion. Fusing Characerisics: Ω R 5 Ω 3 2 NFR25 This graph is based on measured daa which may deviae according o he applicaion. Fusing Characerisics: 5 Ω R 5 kω P overload (W) NFR25H This graph is based on measured daa which may deviae according o he applicaion. Fusing Characerisics: Ω Fusing Characerisics Documen Number: For echnical quesions, conac: filmresisors.leaded@vishay.com Revision: 2-Feb P overload (W) NFR25H This graph is based on measured daa which may deviae according o he applicaion. Fusing Characerisic: Ω R 5 kω

5 NFR25/25H Fusible, Non-Flammable Resisors 3 P max. (W) 3 p/ = i i NFR25 Pulse on a regular basis; maximum permissible peak pulse power (P max. ) as a funcion of pulse duraion ( i ),.22 Ω R <5Ω 3 P max. (W) 2 / = p i i NFR25 Pulse on a regular basis; maximum permissible peak pulse power (P max. ) as a funcion of pulse duraion ( i ), 5 Ω<R 5 kω 6 V max. (V) i Pulse Loading Capabiliies NFR25 Pulse on a regular basis; maximum permissible peak pulse volage V max. as a funcion of pulse duraion ( i ) For echnical quesions, conac: filmresisors.leaded@vishay.com Documen Number: Revision: 2-Feb-8

6 Fusible, Non-Flammable Resisors NFR25/25H 3 P max. (W) 2 p/ i = i NFR25H Pulse on a regular basis; maximum permissible peak pulse power (P max. ) as a funcion of pulse duraion ( i ) 2 V max. (V) i NFR25H Pulse on a regular basis; maximum permissible peak pulse volage (V max. ) as a funcion of pulse duraion ( i ) Pulse Loading Capabiliies T (K) Applicaion Informaion.2.4 P (W).6 NFR25 Ho-spo emperaure rise (ΔT) as a funcion of dissipaed power Documen Number: For echnical quesions, conac: filmresisors.leaded@vishay.com Revision: 2-Feb-8 3

7 NFR25/25H Fusible, Non-Flammable Resisors 5 T (K) 4 T (K) mm mm 5 mm P (W).6 Minimum disance from resisor body o PCB = mm NFR25 Temperaure rise (ΔT) a he lead end (soldering poin) as a funcion of dissipaed power a various lead lenghs afer mouning T (K) P (W).6 NFR25H Ho-spo emperaure rise (ΔT) as a funcion of dissipaed power. 5 mm mm 3 5 mm 2 Applicaion Informaion.2.4 P (W).6 Minimum disance from resisor body o PCB = mm NFR25H Temperaure rise (ΔT) a he lead end (soldering poin) as a funcion of dissipaed power a various lead lenghs afer mouning TESTS AND REQUIREMENTS Essenially all ess are carried ou in accordance wih he schedule of IEC publicaion 65-, caegory LCT/UCT/56 (raed emperaure range: Lower Caegory Temperaure, Upper Caegory Temperaure; damp hea, long erm, 56 days). The esing also covers he requiremens specified by EIA and EIAJ. The ess are carried ou in accordance wih IEC publicaion 668-2, Recommended basic climaic and mechanical robusness esing procedure for elecronic componens and under sandard amospheric condiions according o IEC 668-, subclause 5.3. In he Tes Procedures and Requiremens able he ess and requiremens are lised wih reference o he relevan clauses of IEC publicaions 65- and ; a shor descripion of he es procedure is also given. In some insances deviaions from he IEC recommendaions were necessary for our mehod of specifying. For inflammabiliy requiremens reference is made o IEC 65- and o EN 4, appendix D. All soldering ess are performed wih mildly acivaed flux. For echnical quesions, conac: filmresisors.leaded@vishay.com Documen Number: Revision: 2-Feb-8

8 Fusible, Non-Flammable Resisors NFR25/25H TEST PROCEDURES AND REQUIREMENTS IEC 65- CLAUSE IEC TEST METHOD TEST PROCEDURE REQUIREMENTS Documen Number: For echnical quesions, conac: Revision: 2-Feb-8 33 NFR25 NFR25H TESTS IN ACCORDANCE WITH THE SCHEDULE OF IEC PUBLICATION visual examinaion no holes; clean surface; no damage dimensions (ouline) gauge (mm) see Dimensions Table 4.5 applied volage (+ /- %): R < Ω:. V resisance Ω R < Ω:.3V (refer noe on firs page for measuring disance) Ω R <kω: V R - R nom : max. ± 5 % kω R <kω: 3V kω R 5 kω: V (Tb) resisance o soldering hea hermal shock: 3 s; 35 C; 3 mm from body ΔR max.: ± (.25 % R +.5 Ω) 4.29 componen solven isopropyl alcohol or H 45 (Xa) 2 O followed by resisance brushing in accordance wih MIL 22 F no visual damage (Ta) solderabiliy 2 s; 235 C good inning; no damage 4.7 volage proof on insulaion U RMS = 5 V RMS during min; meal block mehod no breakdown or flashover (U) robusness of erminaions: (Ua) ensile all samples load N; s number of failures < x (Ub) bending half number of samples load 5 N; 4 x 9 number of failures < x (Uc) orsion oher half of samples 3 x 36 in opposie direcions no damage ΔR max.: ± (.25 % R +.5 Ω) (Eb) bump 3 x 5 bumps in 3 direcions; 4 g no damage ΔR max.: ± (.25 % R +.5 Ω) (Fc) vibraion 4.9 rapid change of 4 (Na) emperaure 4.23 climaic sequence: (Db) damp hea (acceleraed) s cycle (Db) damp hea (acceleraed) remaining cycles (Ca) damp hea (seady sae) (IEC) endurance (a 7 C) endurance a upper caegory emperaure emperaure coefficien frequency Hz o 5 Hz; displacemen.5 mm or acceleraion g; 3 direcions; oal 6 h (3 x 2 h) 3 min a LCT and 3 min a UCT; 5 cycles 6 days; 55 C; 95 % o 98 % RH 56 days; 4 C;9 %o95%rh; loaded wih. Pn (IEC seps: 4 o V) h; loaded wih Pn or V max. ;.5 h ON and.5 h OFF h; no load no damage ΔR max.: ± (.25 % R +.5 Ω) no visual damage ΔR max.: ± (.25 % +.5 Ω) R ins min.: 3 MW ΔR max.: ± ( % R +.5 Ω) R ins max.: MΩ ΔR max.: ± ( % R +.5 Ω) ΔR max.: ± ( % R +.5 Ω) ΔR max.: ± ( % R +.5 Ω) a 2/LCT/2 C and 2/UCT/2 C (TCR x 6 /K):.22 Ω R 4.7 Ω ± 2 x -6 /K ± 2 x -6 /K 4.7 Ω < R 5 Ω ± 2 x -6 /K ± x -6 /K 5 Ω < R 5 kω ± x -6 /K ± x -6 /K 4.2 noise IEC publicaion 695 <. µv/v 4.26 accidenal overload cheese-cloh nonflammable OTHER TESTS IN ACCORDANCE WITH IEC 65 CLAUSES AND IEC 668 TEST METHOD (Ta) see 2 nd amendmen o IEC 65-, Jan. 87 solderabiliy (afer ageing) insulaion resisance pulse load 8 h seam or 6 h 55 C; leads immersed 6 mm for 2±.5s in a solder bah a 235 ± 5 C maximum volage U max. DC = 5 V afer min; meal block mehod good inning ( 95 % covered); no damage R ins min.: 4 MΩ see he Pulse Loading Capabiliies graphs

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