NFR25/25H Vishay BCcomponents Fusible, Non-Flammable Resistors FEATURES 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”. • 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) APPLICATIONS • Audio • Video TECHNICAL SPECIFICATIONS VALUE DESCRIPTION NFR25 NFR25H 0.22 Ω to 15 kΩ Resistance Range (1) Resistance Tolerance and Series ± 5 %; E24 series Maximum Dissipation at Tamb = 70 °C 0.33 W 0.5 W 240 K/W 150 K/W 0.22 Ω ≤ R ≤ 4.7 Ω ≤ ± 200 x 10-6/K ≤ ± 200 x 10-6/K 4.7 Ω < R ≤ 15 Ω ≤ ± 200 x 10-6/K ≤ ± 100 x 10-6/K 15 Ω < R ≤ 15 kΩ ≤ ± 100 x 10-6/K ≤ ± 100 x 10-6/K 250 V 350 V Thermal Resistance Rth Temperature Coefficient: Maximum Permissible Voltage (DC or RMS) Basic Specifications IEC 60115-1 and 60115-2 Climatic Category (IEC 60068) 55/155/56 Stability After: Load ΔR max.: ± (1 % R + 0.05 Ω) Climatic Tests ΔR max.: ± (1 % R + 0.05 Ω) ΔR max.: ± (0.25 % R + 0.05 Ω) 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 12NC INFORMATION Last Digit of 12NC Indicating Resistance Decade • 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 RESISTANCE DECADE 0.22 to 0.91 Ω 1 to 9.1 Ω 10 to 91 Ω 100 to 910 Ω 1 to 9.1 kΩ 10 to 15 kΩ LAST DIGIT 7 8 9 1 2 3 12NC Example The 12NC for a NFR25 resistor with value 750 Ω, supplied on a bandolier of 1000 units in ammopack is: 2322 205 13751. www.vishay.com 126 For technical questions, contact: [email protected] Document Number: 28737 Revision: 21-Feb-08 NFR25/25H Fusible, Non-Flammable Resistors Vishay BCcomponents 12NC - resistor type and packaging 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 AND PRODUCT DESCRIPTION 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 TCR/MATERIAL VALUE TOLERANCE PACKAGING (1) 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 NFR25 5% A1 R22 MODEL/SIZE NFR25 NFR25H TOLERANCE ±5% PACKAGING (1) N4 A5 A1 R5 RESISTANCE VALUE 1K0 = 1 kΩ 4R7 = 4.7 Ω 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 PIECES DESCRIPTION N4 4000 Bandolier in ammopack radial taped A5 5000 Bandolier in ammopack straight leads A1 1000 Bandolier in ammopack straight leads R5 5000 Bandolier on reel straight leads MODEL/SIZE NFR25, NFR25H Document Number: 28737 Revision: 21-Feb-08 For technical questions, contact: [email protected] www.vishay.com 127 NFR25/25H Fusible, Non-Flammable Resistors Vishay BCcomponents DIMENSIONS L1 Ø d Ø D L2 Outline DIMENSIONS - resistor types and relevant physical dimensions TYPE Ø Dmax. L1 max. L2 max. Ød 2.5 6.5 7.5 0.58 ± 0.05 NFR25 NFR25H OUTLINES MASS PER 100 UNITS TYPE 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”). MASS (g) NFR25 20.1 NFR25H 20.1 FUNCTIONAL PERFORMANCE 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. 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 LIMITING VOLTAGE (1) (V) LIMITING POWER (W) NFR25 250 0.33 NFR25H 350 0.5 TYPE 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 128 For technical questions, contact: [email protected] Document Number: 28737 Revision: 21-Feb-08 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. Pmax. (%Prated) 10 3 t (s) 100 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) Derating 10 3 10 - 1 0 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 Ω 10 3 t (s) t (s) 10 2 10 2 10 10 1 1 10 - 1 4 0 4 8 Poverload (W) 12 NFR25 This graph is based on measured data which may deviate according to the application. Fusing Characteristics: 1 Ω ≤ R ≤ 15 Ω 10 3 10 - 1 4 8 Poverload (W) 12 NFR25 This graph is based on measured data which may deviate according to the application. Fusing Characteristics: 15 Ω ≤ R ≤ 15 kΩ 10 3 t (s) t (s) 10 2 10 2 10 10 1 1 10 - 1 0 0 4 8 12 16 20 24 10 - 1 0 4 8 NFR25H This graph is based on measured data which may deviate according to the application. Fusing Characteristics: ≤ 1 Ω 12 16 20 24 Poverload (W) Poverload (W) NFR25H This graph is based on measured data which may deviate according to the application. Fusing Characteristic: 1 Ω ≤ R ≤ 15 kΩ Fusing Characteristics Document Number: 28737 Revision: 21-Feb-08 For technical questions, contact: [email protected] www.vishay.com 129 NFR25/25H Fusible, Non-Flammable Resistors Vishay BCcomponents 103 Pmax. (W) 103 t p /t i = 1000 10 500 200 100 50 20 10 5 1 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), 0.22 Ω ≤ R < 15 Ω 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 Ω < R ≤ 15 kΩ 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: [email protected] Document Number: 28737 Revision: 21-Feb-08 NFR25/25H Fusible, Non-Flammable Resistors Vishay BCcomponents 103 Pmax. (W) t p /t i = 1000 500 200 100 50 102 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 (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 (ΔT) as a function of dissipated power Application Information Document Number: 28737 Revision: 21-Feb-08 For technical questions, contact: [email protected] www.vishay.com 131 NFR25/25H Fusible, Non-Flammable Resistors Vishay BCcomponents 100 50 ∆T (K) ∆T (K) 80 40 5 mm 30 60 10 mm 15 mm 20 40 10 20 0 0 0.2 0.4 P (W) 0 0.6 0 0.2 0.4 P (W) 0.6 Minimum distance from resistor body to PCB = 1 mm NFR25 Temperature rise (ΔT) at the lead end (soldering point) as a function of dissipated power at various lead lengths after mounting NFR25H Hot-spot temperature rise (ΔT) as a function of dissipated power. 50 ∆T (K) 5 mm 40 10 mm 30 15 mm 20 10 0 0 0.2 0.4 P (W) 0.6 Minimum distance from resistor body to PCB = 1 mm NFR25H Temperature rise (ΔT) 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: [email protected] 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) resistance (refer note on first page for measuring distance) 4.18 4.29 4.17 4.7 4.16 4.16.2 4.16.3 4.16.4 4.20 20 (Tb) 45 (Xa) 20 (Ta) resistance to soldering heat component solvent resistance solderability voltage proof on insulation 21 (U) 21 (Ua1) 21 (Uc) robustness of terminations: tensile all samples bending half number of samples torsion other half of samples 3 x 360° in opposite directions 29 (Eb) bump 3 x 1500 bumps in 3 directions; 40 g 6 (Fc) vibration 21 (Ub) 4.22 4.19 4.23 4.23.3 4.23.6 gauge (mm) applied voltage (+ 0/- 10 %): R < 10 Ω: 0.1 V 10 Ω ≤ R < 100 Ω: 0.3 V 100 Ω ≤ R < 1 kΩ: 1 V 1 kΩ ≤ R < 10 kΩ: 3 V 10 kΩ ≤ R ≤ 15 kΩ: 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 14 (Na) 30 (Db) 30 (Db) rapid change of temperature climatic sequence: damp heat (accelerated) 1st cycle damp heat (accelerated) remaining cycles no holes; clean surface; no damage see Dimensions Table R - Rnom: max. ± 5 % ΔR max.: ± (0.25 % R + 0.05 Ω) no visual damage good tinning; no damage no breakdown or flashover load 10 N; 10 s number of failures < 10 x 10−6 load 5 N; 4 x 90° number of failures < 10 x 10−6 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 6 days; 55 °C; 95 % to 98 % RH no damage ΔR max.: ± (0.25 % R + 0.05 Ω) no damage ΔR max.: ± (0.25 % R + 0.05 Ω) no damage ΔR max.: ± (0.25 % R + 0.05 Ω) no visual damage ΔR max.: ± (0.25 % + 0.05 Ω) Rins min.: 103 MW ΔR max.: ± (1 % R + 0.05 Ω) 56 days; 40 °C; 90 % to 95 % RH; Rins max.: 1000 MΩ loaded with 0.01 Pn ΔR max.: ± (1 % R + 0.05 Ω) (IEC steps: 4 to 100 V) 4.25.1 1000 h; ΔR max.: ± (1 % R + 0.05 Ω) 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; ΔR max.: ± (1 % R + 0.05 Ω) 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 Ω ≤ R ≤ 4.7 Ω ≤ ± 200 x 10-6/K ≤ ± 200 x 10-6/K temperature coefficient 4.7 Ω < R ≤ 15 Ω ≤ ± 200 x 10-6/K ≤ ± 100 x 10-6/K 15 Ω < R ≤ 15 kΩ ≤ ± 100 x 10-6/K ≤ ± 100 x 10-6/K 4.12 noise “IEC publication 60195” < 0.1 µV/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 MΩ 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 4.24.2 3 (Ca) Document Number: 28737 Revision: 21-Feb-08 damp heat (steady state) (IEC) For technical questions, contact: [email protected] 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