NFR25/25H Vishay BCcomponents Fusible, Non-Flammable Resistors FEATURES * * * * Overload protection without risk of fire Wide range of overload currents Lead (Pb)-free solder contacts Pure tin plating provides compatibility with lead (Pb)-free and lead containing soldering processes * Compatible with "Restriction of the use of Hazardous Substances" (RoHS) directive 2002/95/EC (issue 2004) APPLICATIONS * Audio * Video A homogeneous film of metal alloy is deposited on a high grade ceramic body. After a helical groove has been cut in the resistive layer, tinned connecting wires of electrolytic copper are welded to the end-caps. The resistors are coated with a grey, flame retardant lacquer which provides electrical, mechanical, and climatic protection. The encapsulation is resistant to all cleaning solvents in accordance with "MIL-STD-202E, method 215", and "IEC 60068-2-45". TECHNICAL SPECIFICATIONS VALUE DESCRIPTION NFR25 Resistance range1) Resistance tolerance and series Maximum dissipation at Tamb = 70 C Thermal resistance Rth Temperature coefficient: 0.22 R 4.7 4.7 < R 15 15 < R 15 k Maximum permissible voltage (DC or RMS) Basic specifications Climatic category (IEC 60068) Stability after: load climatic tests soldering NFR25H 0.22 to 15 k 5 %; E24 series 0.33 W 240 K/W 0.5 W 150 K/W 200 x 10-6/K 200 x 10-6/K 200 x 10-6/K 100 x 10-6/K 100 x 10-6/K 100 x 10-6/K 250 V 350 V IEC 60115-1 and 60115-2 55/155/56 R/R max.: 1 % + 0.05 R/R max.: 1 % + 0.05 R/R max.: 0.25 % + 0.05 Note 1. Ohmic values (other than resistance range) are available on request. 12NC INFORMATION * The resistors have a 12-digit numeric code starting with 23 * The subsequent 7 digits indicate the resistor type and packing * The remaining 3 digits indicate the resistance values: - The first 2 digits indicate the resistance value - The last digit indicates the resistance decade Last Digit of 12NC Indicating Resistance Decade RESISTANCE DECADE 0.22 to 0.91 1 to 9.1 10 to 91 100 to 910 1 to 9.1 k 10 to 15 k LAST DIGIT 7 8 9 1 2 3 12NC Example The 12NC for a NFR25 resistor with value 750 , supplied on a bandolier of 1000 units in ammopack is: 2322 205 13751. www.vishay.com 116 For technical questions contact: ff3dresistors@vishay.com Document Number: 28737 Revision: 02-Dec-05 NFR25/25H Vishay Fusible, Non-Flammable Resistors 12NC - resistor type and packing ORDERING CODE 23.. ... ..... BANDOLIER ON REEL BANDOLIER IN AMMOPACK TYPE RADIAL TAPED STRAIGHT LEADS STRAIGHT LEADS 4000 units 1000 units 5000 units 5000 units NFR25 06 204 03... 22 205 13... 22 205 33... 22 205 23... NFR25H 06 207 03... 22 207 13... 22 207 33... 22 207 23... PART NUMBER PART NUMBER: NFR2500002207JA100 N F R 2 5 0 0 0 0 2 2 0 7 J A 1 0 0 MODEL/SIZE SPECIAL CHARACTER TC/MATERIAL VALUE TOLERANCE PACKING1) SPECIAL NFR2500 NFR25H0 0 = neutral Z = value overflow (Special) 0 = standard 3 digit value 1 digit multiplier Multiplier: 7 = *10-3 8 = *10-2 9 = *10-1 0 = *100 1 = *101 2 = *102 J=5% N4 A5 A1 R5 The 2 digits are used for all special parts. 00 = standard PRODUCT DESCRIPTION: NFR25 5 % A1 R22 1) NFR25 5% A1 R22 MODEL/SIZE NFR25 NFR25H TOLERANCE 5% PACKING1) A1 A5 RESISTANCE VALUE 47K = 47 K 50R1 = 50.1 Please refer to table PACKING for details. Note Products can be ordered using either the 12NC or the PART NUMBER. The PART NUMBER is shown to facilitate the introduction of a unified part numbering system. Currently, this PART NUMBER is applicable in the Americas only. PACKING CODE PIECES DESCRIPTION N4 4 000 Bandolier in ammopack radial taped A5 5 000 Bandolier in ammopack straight leads A1 1 000 Bandolier in ammopack straight leads R5 5 000 Bandolier on reel straight leads Document Number: 28737 Revision: 02-Dec-05 MODEL/SIZE NFR25, NFR25H For technical questions contact: ff3dresistors@vishay.com www.vishay.com 117 NFR25/25H Vishay BCcomponents Fusible, Non-Flammable Resistors DIMENSIONS L1 d D L2 Outline DIMENSIONS - resistor types and relevant physical dimensions TYPE D MAX. L1 MAX. L2 MAX. d NFR25 NFR25H 2.5 6.5 7.5 0.58 0.05 OUTLINES MASS PER 100 UNITS TYPE MASS (g) NFR25 20.1 NFR25H 20.1 The length of the body (L1) is measured by inserting the leads into holes of two identical gauge plates and moving these plates parallel to each other until the resistor body is clamped without deformation ("IEC publication 60294"). MARKING FUNCTIONAL PERFORMANCE The nominal resistance and tolerance are marked on the resistor using four coloured bands in accordance with IEC publication 60062 "Colour codes for fixed resistors". PRODUCT CHARACTERIZATION Standard values of nominal resistance are taken from the E24 series for resistors with a tolerance of 5 %. The values of the E24 series are in accordance with "IEC publication 60063". For ease of recognition a fifth ring is added, which is violet for type NFR25 and white for type NFR25H. LIMITING VALUES TYPE LIMITING VOLTAGE1) (V) LIMITING POWER (W) NFR25 NFR25H 250 350 0.33 0.5 Note 1. The maximum voltage that may be continuously applied to the resistor element, see "IEC publication 60115-1". The maximum permissible hot-spot temperature is 155 C. www.vishay.com 118 For technical questions contact: ff3dresistors@vishay.com Document Number: 28737 Revision: 02-Dec-05 NFR25/25H Fusible, Non-Flammable Resistors The power that the resistor can dissipate depends on the operating temperature. Vishay BCcomponents The resistors will fuse without the risk of fire and within an indicated range of overload. Fusing means that the resistive value of the resistor increases at least 100 times. The fusing characteristic is measured under constant voltage. 103 Pmax (%Prated) t (s) 100 102 10 50 1 0 - 55 0 50 70 100 155 Tamb (C) 10-1 Maximum dissipation (Pmax) in percentage of rated power as a function of the ambient temperature (Tamb) Derating 10 3 0 4 8 12 16 20 24 Poverload (W) NFR25 This graph is based on measured data which may deviate according to the application. Fusing Characteristics: 1 10 3 t (s) t (s) 10 2 10 2 10 10 1 1 10-1 10-1 0 4 8 Poverload (W) 12 NFR25 This graph is based on measured data which may deviate according to the application. Fusing Characteristics: 1 R 15 0 4 8 12 Poverload (W) NFR25 This graph is based on measured data which may deviate according to the application. Fusing Characteristics: 15 R 15 k 103 103 t (s) t (s) 102 102 10 10 1 1 10-1 0 4 8 12 16 20 24 Poverload (W) NFR25H This graph is based on measured data which may deviate according to the application. Fusing Characteristics: 1 Fusing Characteristic Document Number: 28737 Revision: 02-Dec-05 10-1 0 4 8 12 16 20 24 Poverload (W) NFR25H This graph is based on measured data which may deviate according to the application. Fusing Characteristic: 1 R 15 k : For technical questions contact: ff3dresistors@vishay.com www.vishay.com 119 NFR25/25H Vishay BCcomponents Fusible, Non-Flammable Resistors 103 P max (W) 102 tp/ti = 1000 500 200 100 10 50 20 10 5 1 2 10-1 10-6 10-5 10-4 10-3 10-2 10-1 ti (s) 1 NFR25 Pulse on a regular basis; maximum permissible peak pulse power ( P max ) as a function of pulse duration (ti), 0.22 R < 15 103 P max (W) 102 10 tp/ti = 1000 100 1 20 2 10-1 10-6 10 -5 10 -4 10 -3 10 -2 10-1 ti (s) 1 NFR25 Pulse on a regular basis; maximum permissible peak pulse power ( P max ) as a function of pulse duration (ti), 15 < R 15 k 600 V max (V) 500 400 300 200 100 0 10 -6 10 -5 10 -4 10-3 10-2 10-1 t i (s) 1 NFR25 Pulse on a regular basis; maximum permissible peak pulse voltage ( V max ) as a function of pulse duration (ti) Pulse Loading Capabilities www.vishay.com 120 For technical questions contact: ff3dresistors@vishay.com Document Number: 28737 Revision: 02-Dec-05 NFR25/25H Vishay BCcomponents Fusible, Non-Flammable Resistors 10 3 P max (W) 10 2 pt i/t = 1000 500 200 100 50 20 10 10 5 2 1 10 -1 10-6 10-5 10 -4 10-3 10-2 10-1 t i (s) 1 NFR25H Pulse on a regular basis; maximum permissible peak pulse power ( P max ) as a function of pulse duration (ti) 1200 Vmax (V) 800 400 0 10-6 10-5 10-4 10 -3 10 -2 10 -1 ti (s) 1 NFR25H Pulse on a regular basis; maximum permissible peak pulse voltage ( V max ) as a function of pulse duration (ti) Pulse Loading Capabilities 100 T (K) 80 60 40 20 0 0 0.2 0.4 P (W) 0.6 NFR25 Hot-spot temperature rise (T) as a function of dissipated power Application Information Document Number: 28737 Revision: 02-Dec-05 For technical questions contact: ff3dresistors@vishay.com www.vishay.com 121 NFR25/25H Vishay BCcomponents Fusible, Non-Flammable Resistors 50 T (K) 40 5 mm 30 10 mm 15 mm 20 10 Minimum distance from resistor body to PCB = 1 mm 0 0.2 0.4 P (W) 0.6 NFR25 Temperature rise (T) at the lead end (soldering point) as a function of dissipated power at various lead lengths after mounting 0 0.2 0.4 P (W) 0.6 NFR25H Hot-spot temperature rise (T) as a function of dissipated power. 0 100 T (K) 80 60 40 20 0 50 T (K) 5 mm 40 10 mm 30 15 mm 20 Minimum distance from resistor body to PCB = 1 mm 10 NFR25H Temperature rise (T) at the lead end (soldering point) as a function of dissipated power at various lead lengths after mounting 0 0 0.2 0.4 P (W) 0.6 Application Information www.vishay.com 122 For technical questions contact: ff3dresistors@vishay.com Document Number: 28737 Revision: 02-Dec-05 NFR25/25H Vishay Fusible, Non-Flammable Resistors TESTS AND REQUIREMENTS Essentially all tests are carried out in accordance with the schedule of "IEC publication 60115-1", category LCT/UCT/56 (rated temperature range: Lower Category Temperature, Upper Category Temperature; damp heat, long term, 56 days). The testing also covers the requirements specified by EIA and EIAJ. In the Test Procedures and Requirements table the tests and requirements are listed with reference to the relevant clauses of "IEC publications 60115-1 and 60068-2"; a short description of the test procedure is also given. In some instances deviations from the IEC recommendations were necessary for our method of specifying. For inflammability requirements reference is made to "IEC 60115-1" and to "EN 140000, appendix D". The tests are carried out in accordance with IEC publication 60068-2, "Recommended basic climatic and mechanical robustness testing procedure for electronic components" and under standard atmospheric conditions according to "IEC 60068-1", subclause 5.3. All soldering tests are performed with mildly activated flux. TEST PROCEDURES AND REQUIREMENTS IEC 60115-1 CLAUSE REQUIREMENTS IEC 60068-2 TEST METHOD TEST PROCEDURE NFR25 NFR25H TESTS IN ACCORDANCE WITH THE SCHEDULE OF IEC PUBLICATION 60115-8 4.4.1 visual examination no holes; clean surface; no damage 4.4.2 dimensions (outline) gauge (mm) see Dimensions Table 4.5 resistance applied voltage (+ 0/- 10 %): R - Rnom: max. 5 % R < 10 : 0.1 V 10 R < 100 : 0.3 V 100 R < 1 k: 1 V 1 k R < 10 k: 3 V 10 k R 15 k: 10 V 4.18 20 (Tb) resistance to soldering heat thermal shock: 3 s; 350 C; 3 mm from body 4.29 45 (Xa) component solvent resistance isopropyl alcohol or H2O followed by brushing in accordance with "MIL 202 F" 4.17 20 (Ta) solderability 2 s; 235 C voltage proof on insulation 500 V (RMS) during 1 minute; metal block method 4.7 R/R max.: 0.25 % + 0.05 no visual damage good tinning; no damage no breakdown or flashover 4.16 21 (U) robustness of terminations: 4.16.2 21 (Ua1) tensile all samples load 10 N; 10 s number of failures < 10 x 10-6 4.16.3 4.16.4 21 (Ub) 21 (Uc) bending half number of samples torsion other half of samples load 5 N; 4 x 90 3 x 360 in opposite directions 4.20 29 (Eb) bump 3 x 1500 bumps in 3 directions; 40 g number of failures < 10 x 10-6 no damage R/R max.: 0.25 % + 0.05 no damage R/R max.: 0.25 % + 0.05 4.22 6 (Fc) vibration frequency 10 to 500 Hz; displacement 1.5 mm or acceleration 10 g; 3 directions; total 6 hours (3 x 2 hours) no damage R/R max.: 0.25 % + 0.05 4.19 14 (Na) rapid change of temperature 30 minutes at LCT and 30 minutes at UCT; 5 cycles no visual damage R/R max.: 0.25 % + 0.05 4.23 4.23.3 30 (Db) 4.23.6 30 (Db) 6 days; 55 C; 95 to 98 % RH Rins min.: 103 M R/R max.: 1 % + 0.05 Document Number: 28737 Revision: 02-Dec-05 climatic sequence: damp heat (accelerated) 1st cycle damp heat (accelerated) remaining cycles For technical questions contact: ff3dresistors@vishay.com www.vishay.com 123 NFR25/25H Vishay BCcomponents Fusible, Non-Flammable Resistors TEST PROCEDURES AND REQUIREMENTS IEC 60115-1 CLAUSE REQUIREMENTS IEC 60068-2 TEST METHOD TEST PROCEDURE NFR25 NFR25H damp heat (steady state) (IEC) 56 days; 40 C; 90 to 95 % RH; loaded with 0.01 Pn (IEC steps: 4 to 100 V) Rins max.: 1000 M R/R max.: 1 % + 0.05 4.25.1 endurance (at 70 C) 1000 hours; loaded with Pn or Vmax; 1.5 hours on and 0.5 hours off R/R max.: 1 % + 0.05 4.25.3 endurance at upper category temperature temperature coefficient 1000 hours; no load at 20/LCT/20 C and 20/UCT/20 C (TC x 10-6/K): 0.22 R 4.7 R/R max.: 1 % + 0.05 200 x 10-6/K 200 x 10-6/K 4.7 < R 15 200 x 10-6/K 100 x 10-6/K 15 < R 15 k 100 x 10-6/K 100 x 10-6/K 4.24.2 3 (Ca) 4.8.4.2 4.12 noise "IEC publication 60195" 4.26 accidental overload cheese-cloth < 0.1 V/V nonflammable OTHER TESTS IN ACCORDANCE WITH IEC 60115 CLAUSES AND IEC 60068 TEST METHOD 4.17 20 (Ta) solderability 8 hours steam or 16 hours 155 C; good tinning ( 95 % covered); (after ageing) leads immersed 6 mm for 2 0.5 s in a no damage solder bath at 235 5 C 4.6.1.1 insulation resistance see 2nd amendment to "IEC 60115-1", Jan.'87 pulse load www.vishay.com 124 maximum voltage 500 V (DC) after 1 minute; metal block method Rins min.: 104 M see the Pulse Loading Capabilities graphs For technical questions contact: ff3dresistors@vishay.com Document Number: 28737 Revision: 02-Dec-05 Legal Disclaimer Notice Vishay Notice Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc., or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies. Information contained herein is intended to provide a product description only. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Vishay for any damages resulting from such improper use or sale. Document Number: 91000 Revision: 08-Apr-05 www.vishay.com 1