NFR25/25H Vishay BCcomponents Fusible, Non-Flammable Resistors FEATURES * Overload protection without risk of fire * Wide range of overload currents (refer Fusing Characteristics graphs) * 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) A homogenous 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". APPLICATIONS * Audio * Video TECHNICAL SPECIFICATIONS DESCRIPTION Resistance Range (1) 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 Notes: (1) Ohmic values (other than resistance range) are available on request * R value is measured with probe distance of 24 1 mm using 4-terminal method R max.: (1 % R + 0.05 ) R max.: (1 % R + 0.05 ) R max.: (0.25 % R + 0.05 ) 200 x 10-6/K 200 x 10-6/K 100 x 10-6/K 250 V IEC 60115-1 and 60115-2 55/155/56 200 x 10-6/K 100 x 10-6/K 100 x 10-6/K 350 V 0.33 W 240 K/W VALUE NFR25 0.22 to 15 k 5 %; E24 series 0.5 W 150 K/W NFR25H 12NC INFORMATION * The resistors have a 12-digit numeric code starting with 23 * The subsequent 7 digits indicate the resistor type and packaging * 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 126 For technical questions, contact: filmresistors.leaded@vishay.com Document Number: 28737 Revision: 21-Feb-08 NFR25/25H Fusible, Non-Flammable Resistors Vishay BCcomponents 12NC - resistor type and packaging ORDERING CODE 23.. ... ..... BANDOLIER IN AMMOPACK TYPE RADIAL TAPED 4000 UNITS NFR25 NFR25H 06 204 03... 06 207 03... 1000 UNITS 22 205 13... 22 207 13... STRAIGHT LEADS 5000 UNITS 22 205 33... 22 207 33... BANDOLIER ON REEL STRAIGHT LEADS 5000 UNITS 22 205 23... 22 207 23... PART NUMBER AND PRODUCT DESCRIPTION PART NUMBER: NFR2500002207JA100 N MODEL/SIZE NFR2500 NFR25H0 F R 2 5 0 0 0 0 2 2 0 7 J A 1 0 0 SPECIAL The 2 digits are used for all special parts. 00 = Standard SPECIAL CHARACTER 0 = Neutral Z = Value overflow (Special) TCR/MATERIAL 0 = Standard VALUE 3 digit value 1 digit multiplier MULTIPLIER 7 = *10-3 8 = *10-2 9 = *10-1 0 = *100 1 = *101 2 = *102 TOLERANCE J=5% PACKAGING (1) N4 A5 A1 R5 PRODUCT DESCRIPTION: NFR25 5 % A1 R22 NFR25 MODEL/SIZE NFR25 NFR25H 5% TOLERANCE 5% A1 PACKAGING (1) N4 A5 A1 R5 R22 RESISTANCE VALUE 1K0 = 1 k 4R7 = 4.7 Notes: (1) Please refer to table PACKAGING for details. * The PART NUMBER is shown to facilitate the introduction of a unified part numbering system for ordering products. PACKAGING CODE N4 A5 A1 R5 PIECES 4000 5000 1000 5000 DESCRIPTION Bandolier in ammopack radial taped Bandolier in ammopack straight leads NFR25, NFR25H Bandolier in ammopack straight leads Bandolier on reel straight leads MODEL/SIZE Document Number: 28737 Revision: 21-Feb-08 For technical questions, contact: filmresistors.leaded@vishay.com www.vishay.com 127 NFR25/25H Vishay BCcomponents DIMENSIONS L1 Fusible, Non-Flammable Resistors Od OD L2 Outline DIMENSIONS - resistor types and relevant physical dimensions TYPE NFR25 2.5 NFR25H 6.5 7.5 0.58 0.05 O Dmax. L1 max. L2 max. Od MASS PER 100 UNITS TYPE NFR25 NFR25H MASS (g) 20.1 20.1 OUTLINES 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 The nominal resistance and tolerance are marked on the resistor using four coloured bands in accordance with IEC publication 60062 "Color codes for fixed resistors". For ease of recognition a fifth ring is added, which is violet for type NFR25 and white for type NFR25H. FUNCTIONAL PERFORMANCE 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". LIMITING VALUES TYPE NFR25 NFR25H Note: (1) LIMITING VOLTAGE (1) (V) 250 350 LIMITING POWER (W) 0.33 0.5 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 128 For technical questions, contact: filmresistors.leaded@vishay.com Document Number: 28737 Revision: 21-Feb-08 NFR25/25H Fusible, Non-Flammable Resistors Vishay BCcomponents The power that the resistor can dissipate depends on the operating temperature. 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. 10 3 Pmax. (%Prated) 100 t (s) 10 2 50 10 1 0 - 55 0 50 70 100 155 Tamb (C) Maximum dissipation (Pmax.) in percentage of rated power as a function of the ambient temperature (Tamb) 10 - 1 0 4 8 12 16 20 24 Poverload (W) Derating 10 3 NFR25 This graph is based on measured data which may deviate according to the application. Fusing Characteristics: 1 10 3 t (s) 10 2 t (s) 10 2 10 10 1 1 10 - 1 0 4 8 Poverload (W) 12 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 10 3 NFR25 This graph is based on measured data which may deviate according to the application. Fusing Characteristics: 15 R 15 k 10 3 t (s) 10 2 t (s) 10 2 10 10 1 1 10 - 1 0 4 8 12 16 20 24 10 - 1 0 4 8 12 16 20 24 Poverload (W) Poverload (W) NFR25H This graph is based on measured data which may deviate according to the application. Fusing Characteristics: 1 NFR25H This graph is based on measured data which may deviate according to the application. Fusing Characteristic: 1 R 15 k Fusing Characteristics Document Number: 28737 Revision: 21-Feb-08 For technical questions, contact: filmresistors.leaded@vishay.com www.vishay.com 129 NFR25/25H Vishay BCcomponents 103 Pmax. (W) Fusible, Non-Flammable Resistors 103 t p /t i = 1000 10 500 200 100 50 20 10 5 2 1 10- 1 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 power (Pmax.) as a function of pulse duration (ti), 0.22 R < 15 103 Pmax. (W) 102 10 t p / t i = 1000 100 1 20 2 10- 1 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 power (Pmax.) as a function of pulse duration (ti), 15 < R 15 k 600 Vmax. (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 Vmax. as a function of pulse duration (ti) Pulse Loading Capabilities www.vishay.com 130 For technical questions, contact: filmresistors.leaded@vishay.com Document Number: 28737 Revision: 21-Feb-08 NFR25/25H Fusible, Non-Flammable Resistors Vishay BCcomponents 103 Pmax. (W) 102 t p /t i = 1000 500 200 100 50 20 10 5 10 1 2 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 (Pmax.) 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 t i (s) 1 NFR25H Pulse on a regular basis; maximum permissible peak pulse voltage (Vmax.) 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: 21-Feb-08 For technical questions, contact: filmresistors.leaded@vishay.com www.vishay.com 131 NFR25/25H Vishay BCcomponents Fusible, Non-Flammable Resistors 50 T (K) 40 5 mm 30 10 mm 15 mm 20 100 T (K) 80 60 40 10 20 0 0 0.2 0.4 P (W) 0.6 0 0 0.2 0.4 P (W) 0.6 Minimum distance from resistor body to PCB = 1 mm NFR25 Temperature rise (T) at the lead end (soldering point) as a function of dissipated power at various lead lengths after mounting 50 T (K) 40 10 mm 30 15 mm 20 NFR25H Hot-spot temperature rise (T) as a function of dissipated power. 5 mm 10 0 0 0.2 0.4 P (W) 0.6 Minimum distance from resistor body to PCB = 1 mm NFR25H Temperature rise (T) at the lead end (soldering point) as a function of dissipated power at various lead lengths after mounting Application Information 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. 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. www.vishay.com 132 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". All soldering tests are performed with mildly activated flux. For technical questions, contact: filmresistors.leaded@vishay.com Document Number: 28737 Revision: 21-Feb-08 NFR25/25H Fusible, Non-Flammable Resistors Vishay BCcomponents TEST PROCEDURES AND REQUIREMENTS IEC 60115-1 CLAUSE IEC 60068-2 TEST METHOD REQUIREMENTS TEST PROCEDURE NFR25 NFR25H TESTS IN ACCORDANCE WITH THE SCHEDULE OF IEC PUBLICATION 60115-8 4.4.1 4.4.2 4.5 visual examination dimensions (outline) gauge (mm) applied voltage (+ 0/- 10 %): 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 thermal shock: 3 s; 350 C; 3 mm from body isopropyl alcohol or H2O followed by brushing in accordance with "MIL 202 F" 2 s; 235 C URMS = 500 VRMS during 1 min; metal block method load 10 N; 10 s load 5 N; 4 x 90 3 x 360 in opposite directions 3 x 1500 bumps in 3 directions; 40 g frequency 10 Hz to 500 Hz; displacement 1.5 mm or acceleration 10 g; 3 directions; total 6 h (3 x 2 h) 30 min at LCT and 30 min at UCT; 5 cycles no holes; clean surface; no damage see Dimensions Table resistance (refer note on first page for measuring distance) R - Rnom: max. 5 % 4.18 4.29 4.17 4.7 4.16 4.16.2 4.16.3 4.16.4 4.20 4.22 20 (Tb) 45 (Xa) 20 (Ta) resistance to soldering heat component solvent resistance solderability voltage proof on insulation R max.: (0.25 % R + 0.05 ) no visual damage good tinning; no damage no breakdown or flashover number of failures < 10 x 10-6 number of failures < 10 x 10-6 no damage R max.: (0.25 % R + 0.05 ) no damage R max.: (0.25 % R + 0.05 ) no damage R max.: (0.25 % R + 0.05 ) no visual damage R max.: (0.25 % + 0.05 ) 21 (U) 21 (Ua1) 21 (Ub) 21 (Uc) 29 (Eb) 6 (Fc) robustness of terminations: tensile all samples bending half number of samples torsion other half of samples bump vibration rapid change of temperature climatic sequence: damp heat (accelerated) 1st cycle damp heat (accelerated) remaining cycles damp heat (steady state) (IEC) 4.19 4.23 4.23.3 4.23.6 4.24.2 14 (Na) 30 (Db) 30 (Db) 3 (Ca) 6 days; 55 C; 95 % to 98 % RH Rins min.: 103 MW R max.: (1 % R + 0.05 ) 56 days; 40 C; 90 % to 95 % RH; Rins max.: 1000 M loaded with 0.01 Pn R max.: (1 % R + 0.05 ) (IEC steps: 4 to 100 V) 4.25.1 1000 h; R max.: (1 % R + 0.05 ) endurance (at 70 C) loaded with Pn or Vmax.; 1.5 h ON and 0.5 h OFF 4.25.3 endurance at upper 1000 h; R max.: (1 % R + 0.05 ) category temperature no load 4.8.4.2 at 20/LCT/20 C and 20/UCT/20 C (TCR x 10-6/K): 0.22 R 4.7 200 x 10-6/K 200 x 10-6/K temperature coefficient 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 4.12 noise "IEC publication 60195" < 0.1 V/V 4.26 accidental overload cheese-cloth nonflammable OTHER TESTS IN ACCORDANCE WITH IEC 60115 CLAUSES AND IEC 60068 TEST METHOD 4.17 8 h steam or 16 h 155 C; solderability leads immersed 6 mm good tinning ( 95 % covered); 20 (Ta) (after ageing) for 2 0.5 s no damage in a solder bath at 235 5 C 4.6.1.1 maximum voltage Umax. DC = 500 V Rins min.: 104 M insulation resistance after 1 min; metal block method see the Pulse Loading Capabilities see 2nd amendment pulse load graphs to "IEC 60115-1", Jan.'87 Document Number: 28737 Revision: 21-Feb-08 For technical questions, contact: filmresistors.leaded@vishay.com www.vishay.com 133 Legal Disclaimer Notice Vishay Disclaimer All product specifications and data are subject to change without notice. Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, "Vishay"), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any information provided herein to the maximum extent permitted by law. The product specifications do not expand or otherwise modify Vishay's terms and conditions of purchase, including but not limited to the warranty expressed therein, which apply to these products. No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding products designed for such applications. Product names and markings noted herein may be trademarks of their respective owners. Document Number: 91000 Revision: 18-Jul-08 www.vishay.com 1