 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| NFR25/25H Vishay BCcomponents Fusible, Non-Flammable Resistors FEATURES * Overload protection without risk of fire * Wide range of overload currents. 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 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 Note 1. Ohmic values (other than resistance range) are available on request. R/R max.: 1 % + 0.05 R/R max.: 1 % + 0.05 R/R max.: 0.25 % + 0.05 200 x 10-6/K 200 x 100 x 10-6/K 10-6/K 200 x 10-6/K 100 x 10-6/K 100 x 10-6/K 350 V IEC 60115-1 and 60115-2 55/155/56 0.33 W 240 K/W VALUE NFR25 0.22 to 15 k 5 %; E24 series 0.5 W 150 K/W NFR25H 250 V 12NC ORDERING CODE INDICATING 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... Document Number: 28737 Revision: 24-Feb-04 For technical questions contact: ff3dresistors@vishay.com www.vishay.com 1 NFR25/25H Vishay BCcomponents ORDERING INFORMATION Numeric Ordering Code (12NC) * The resistors have a 12-digit ordering 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 Fusible, Non-Flammable Resistors Ordering Example The ordering code for a NFR25 resistor with value 750 , supplied on a bandolier of 1000 units in ammopack is: 2322 205 13751. DIMENSIONS L1 d D L2 Outline. DIMENSIONS - resistor types and relevant physical dimensions TYPE NFR25 NFR25H D MAX. 2.5 L1 MAX. 6.5 L2 MAX. 7.5 d 0.58 0.05 MASS PER 100 UNITS TYPE NFR25 NFR25H MASS (g) 21 22 For ease of recognition a fifth ring is added, which is violet for type NFR25 and white for type NFR25H. 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 "Colour codes for fixed resistors". 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. 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 2 For technical questions contact: ff3dresistors@vishay.com Document Number: 28737 Revision: 24-Feb-04 LIMITING VOLTAGE(1) (V) 250 350 LIMITING POWER (W) 0.33 0.5 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. Pmax (%Prated) 100 103 t (s) 102 50 10 1 0 -55 0 50 70 100 155 Tamb (C) 10-1 0 4 8 12 16 20 24 Poverload (W) Maximum dissipation (Pmax) in percentage of rated power as a function of the ambient temperature (Tamb). Derating 10 3 t (s) 10 2 NFR25 This graph is based on measured data which may deviate according to the application. Fusing Characteristics: 1 . 10 3 t (s) 10 2 10 10 1 1 10 -1 10 -1 0 4 8 Poverload (W) 12 0 4 8 12 Poverload (W) NFR25 This graph is based on measured data which may deviate according to the application. Fusing Characteristics: 1 R 15 . 103 t (s) 102 NFR25 This graph is based on measured data which may deviate according to the application. Fusing Characteristics: 15 R 15 . 103 t (s) 102 10 10 1 1 10-1 0 4 8 12 16 20 24 Poverload (W) 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 . NFR25H This graph is based on measured data which may deviate according to the application. Fusing Characteristic. Fusing Characteristic Document Number: 28737 Revision: 24-Feb-04 For technical questions contact: ff3dresistors@vishay.com www.vishay.com 3 NFR25/25H Vishay BCcomponents Fusible, Non-Flammable Resistors 103 P max (W) 102 10 tp/ti = 1000 500 200 100 50 20 10 1 5 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 4 For technical questions contact: ff3dresistors@vishay.com Document Number: 28737 Revision: 24-Feb-04 NFR25/25H Fusible, Non-Flammable Resistors Vishay BCcomponents 10 3 P max (W) 10 2 pt i/t = 1000 500 200 100 50 10 20 10 5 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 ( 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: 24-Feb-04 For technical questions contact: ff3dresistors@vishay.com www.vishay.com 5 NFR25/25H Vishay BCcomponents Fusible, Non-Flammable Resistors 50 T (K) 40 5 mm 30 10 mm 15 mm 20 10 Minimun 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. 0 0 0.2 0.4 P (W) 0.6 100 T (K) 80 60 40 20 0 0 0.2 0.4 P (W) 0.6 NFR25H Hot-spot temperature rise (T) as a function of dissipated power. 50 T (K) 40 10 mm 30 15 mm 20 5 mm 10 Minimun 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. 0 0 0.2 0.4 P (W) 0.6 Application Information www.vishay.com 6 For technical questions contact: ff3dresistors@vishay.com Document Number: 28737 Revision: 24-Feb-04 NFR25/25H Fusible, Non-Flammable Resistors Vishay BCcomponents 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. 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. 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 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 4.18 4.29 4.17 4.7 4.16 4.16.2 4.16.3 4.16.4 4.20 4.22 21 (U) 21 (Ua1) 21 (Ub) 21 (Uc) 29 (Eb) 6 (Fc) 20 (Tb) 45 (Xa) 20 (Ta) resistance to soldering heat component solvent resistance solderability voltage proof on insulation robustness of terminations: tensile all samples bending half number of samples torsion other half of samples no holes; clean surface; no damage see Dimensions Table R - Rnom: max. 5 % 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 500 V (RMS) during 1 minute; metal block method R/R max.: 0.25 % + 0.05 no visual damage good tinning; no damage no breakdown or flashover 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 to 500 Hz; displacement 1.5 mm or acceleration 10 g; 3 directions; total 6 hours (3 x 2 hours) 30 minutes at LCT and 30 minutes at UCT; 5 cycles number of failures < 10 x 10-6 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 no damage R/R max.: 0.25 % + 0.05 no visual damage R/R max.: 0.25 % + 0.05 bump vibration 4.19 4.23 4.23.3 4.23.6 14 (Na) rapid change of temperature climatic sequence: damp heat (accelerated) 1st cycle damp heat (accelerated) remaining cycles 30 (Db) 30 (Db) 6 days; 55 C; 95 to 98 % RH Rins min.: 103 M R/R max.: 1 % + 0.05 Document Number: 28737 Revision: 24-Feb-04 For technical questions contact: ff3dresistors@vishay.com www.vishay.com 7 NFR25/25H Fusible, Non-Flammable Resistors Vishay BCcomponents TEST PROCEDURES AND REQUIREMENTS IEC 60115-1 CLAUSE 4.24.2 IEC 60068-2 TEST METHOD 3 (Ca) REQUIREMENTS TEST PROCEDURE NFR25 NFR25H damp heat (steady state) (IEC) endurance (at 70 C) 56 days; 40 C; 90 to 95% RH; loaded with 0.01 Pn (IEC steps: 4 to 100 V) 1000 hours; loaded with Pn or Vmax; 1.5 hours on and 0.5 hours off 1000 hours; no load at 20/LCT/20 C and 20/UCT/20 C (TC x 10-6/K): 0.22 R 4.7 4.7 < R 15 15 < R 15 k Rins max.: 1000 M R/R max.: 1 % + 0.05 R/R max.: 1 % + 0.05 4.25.1 4.25.3 4.8.4.2 endurance at upper category temperature temperature coefficient R/R max.: 1 % + 0.05 200 x 10-6/K 200 x 10-6/K 100 x 10-6/K 200 x 10-6/K 100 x 10-6/K 100 x 10-6/K 4.12 4.26 noise accidental overload "IEC publication 60195" 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 (after ageing) 8 hours steam or 16 hours 155 C; leads immersed 6 mm for 2 0.5 s in a solder bath at 235 5 C maximum voltage 500 V (DC) after 1 minute; metal block method good tinning ( 95 % covered); no damage 4.6.1.1 see 2nd amendment to "IEC 60115-1", Jan.'87 insulation resistance Rins min.: 104 M see the Pulse Loading Capabilities graphs pulse load Document Number: 28737 Revision: 24-Feb-04 For technical questions contact: ff3dresistors@vishay.com www.vishay.com 8 |
Price & Availability of NFR25
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |