Phoenix do Brasil Ltda. FUSIBLE RESISTOR - NFR25H FEATURES • Metal film; • Fusible resistors; • Overload protection without risk of fire; • Wide range of overload currents; • Different forming styles available; • Defined interruption behavior (fusing time); • Non-flammable lacquer; • High stability, reliability and uniformity characteristics; • Suitable for protection circuit boards and designs; • Low and medium power requirements; • Various packing and taping configurations; • Defined pulse loading capabilities (repetitive and single pulse) MARKET SEGMENTS AND APPLICATIONS Industry sector Application segment End-user equipment Industrial Controls Power supplies Power system control Central heating controls Telecom Data Communication Line protection resistor Power supplies Modems Consumer Sound & Vision Amplifiers TV VCR TECHNOLOGY 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”. NFR25H Revision on 2002/07/11     PHOENIX DO BRASIL LTDA. All rights are reserved. Reproduction whole or in part is Without the written consent of the copyright owner. Page 1 of 9 Phoenix do Brasil Ltda. QUICK REFERENCE DATA NFR25H (E-24 serie) DESCRIPTION Cu-lead Resistance range 0.22Ω to 15kΩ Resistance tolerance ± 5% Maximum dissipation at Tamb = 70ºC 0.5W Thermal resistance (Rth) 150 K/W Temperature coefficient 0.22Ω ≤ R ≤ 4.7Ω ≤ ±200ppm/ºC 4.7Ω < R ≤ 15KΩ ≤ ±100ppm/ºC Limiting voltage (DC or RMS) 350V (1) Rated voltage Pn x R Climatic category (IEC 60068) 55/155/56 Basic specifications IEC 60115-1 and 60115-2 Stability after: Load ΔR/R max.: ±1% + 0.05Ω Climatic tests ΔR/R max.: ±1% + 0.05Ω Resistance to soldering heat ΔR/R max.: ±0.25% + 0.05Ω Note: 1- Maximum rated voltage is the “Limiting voltage”. NFR25H Revision on 2002/07/11     PHOENIX DO BRASIL LTDA. All rights are reserved. Reproduction whole or in part is Without the written consent of the copyright owner. Page 2 of 9 Phoenix do Brasil Ltda. MECHANICAL DATA L2 L1 Table 1 Mass per φ φ φ φD Type A L1 max. L2 max φ φ φ φd |||| B1-B2|||| max. 100units (g) 0.58 ± NFR25H 52 +1.5/-0 2.5 6.5 7.5 1.2 22 0.05 Dimensions in mm MOUNTING The resistors are suitable for processing on automatic insertion equipment, cutting and bending machines. NFR25H Revision on 2002/07/11     PHOENIX DO BRASIL LTDA. All rights are reserved. Reproduction whole or in part is Without the written consent of the copyright owner. Page 3 of 9 Phoenix do Brasil Ltda. ELECTRICAL CHARACTERISTICS DERATING The power that resistor can dissipate depends on the operating temperature. Pmax X Tamb 120 100 80 60 40 20 0 -55 0 55 70 110 155 Tamb (ºC) Maximum dissipation (Pmax) in percentage of rated power as a function of the ambient temperature (Tamb). APPLICATION INFORMATION FOR HOT-SPOT AND SOLDER-SPOT Hot-spot Solder-spot Fig. 1 - Hot spot temperature rise (ΔT) Fig. 2 - Temperature rise (ΔT) at the lead as a function of dissipated power. (soldering point) as a function of dissipated power at various lead lengths after mounting Note: The maximum permissible hot-spot temperature is 155ºC NFR25H Revision on 2002/07/11     PHOENIX DO BRASIL LTDA. All rights are reserved. Reproduction whole or in part is Without the written consent of the copyright owner. Page 4 of 9 Pmax % Prated Phoenix do Brasil Ltda. FUSING CHARACTERISTIC The resistors will fuse without the risk of fire and within an indicated range of overload. Fusing means that resistive value of the resistor increases at least 100 times; see Figs. 3 and 4. The fusing characteristic is measured under constant voltage. This graph is based on measured data witch may deviate according to the application. 1000 100 10 1 0,1 0 2 4 6 8 10 12 141618 2022 Fig. 4 - Fusing characteristic. Fig. 3 - Fusing characteristic: ≤ 1Ω. PULSE LOADING CAPABILITIES Fig. 5 - Pulse on a regular basis, maximum permissible peak pulse power (^Pmax) as a function of pulse duration (ti). NFR25H Revision on 2002/07/11     PHOENIX DO BRASIL LTDA. All rights are reserved. Reproduction whole or in part is Without the written consent of the copyright owner. Page 5 of 9 t (s) Phoenix do Brasil Ltda. Fig. 6 - Pulse on a regular basis, maximum permissible peak pulse voltage (^Vmax) as a function of pulse duration (ti). MARKING The nominal resistance and tolerance are marked on the resistor using four colored bands in accordance with IEC publication 60062 “color code for fixed resistors”. There is a fifth white band in order to indicate the type of resistor. Standard values of nominal resistance are taken from the E24 serie for resistors with a tolerance of 5%. The values of the E24 serie are in accordance with ÏEC publication 60063”. ODERING INFORMATION Table 2. Ordering code indicating resistor type and packaging ORDERING CODE 23xx xxx xxxxx BANDOLIER IN AMMOPACK BANDOLIER ON REEL TOL LEAD ∅ TYPE STRAIGHT LEADS (mm) (%) 52 mm 52 mm 52 mm 5000 units 1000 units 5000 units NFR25H Cu 0.58 5 22 207 33xxx 22 207 13xxx 22 207 23xxx Note: For formed types see “Formed Types Specification” NFR25H Revision on 2002/07/11     PHOENIX DO BRASIL LTDA. All rights are reserved. Reproduction whole or in part is Without the written consent of the copyright owner. Page 6 of 9 Phoenix do Brasil Ltda. ORDERING CODE • The resistors have a 12 digit ordering code starting with 23. • The subsequent 7 digits indicate the resistor type and packaging see table 2. • The remaining 3 digits indicate the resistance value. -The first 2 digits indicate the resistance value. -The last digit indicates the resistance decade in accordance with table 3. Table 3. Last digit of 12NC Resistance decade Last Digit 7 0.22Ω to 0.91Ω 8 1Ω to 9.1Ω 9 10Ω to 91Ω 1 100Ω to 910Ω 2 1 kΩ to 9.1kΩ 3 10 kΩ to 15kΩ Example: The ordering code for an NFR25H resistor with value 750Ω, supplied on a bandolier of 1000 units in ammopack is 2322 205 13751. PACKAGING Bandolier in ammopack Table 4. Type Quantity M N P Bandolier Width 1000 82 28 262 52 + 1.5/-0 NFR25H 5000 78 98 260 Dimensions in mm NFR25H Revision on 2002/07/11     PHOENIX DO BRASIL LTDA. All rights are reserved. Reproduction whole or in part is Without the written consent of the copyright owner. Page 7 of 9 Phoenix do Brasil Ltda. Bandolier on Reel P N M Table 5. Type Quantity M N P Q V R Bandolier Width NFR25H 5000 92 311 311 305 75 86 52 +1.5/-0 Dimensions in mm 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 Table 6 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 made to “IEC 60115-1” and to “EN 140000, appendix D”. All soldering tests are performed with mildly activated flux. Table 6. Test procedures and requirements IEC IEC 60068-2 60115-1 TEST TEST PROCEDURE REQUIREMENTS CLAUSE METHOD 4.4.1 Visual examination No holes; clean surface; no damage Gauge (mm) 4.4.2 Dimensions (outline) See table 1 applied voltage (+0/-10%): 4.5 Resistance R - Rnom: max.: ± 5% R<10Ω: 0.1V 10Ω < R < 100Ω: 0.3V 100Ω < R <1 kΩ : 1V 1kΩ < R < 10 kΩ:3V 10 kΩ < R < 100 kΩ: 10V NFR25H Revision on 2002/07/11     PHOENIX DO BRASIL LTDA. All rights are reserved. Reproduction whole or in part is Without the written consent of the copyright owner. Page 8 of 9 Phoenix do Brasil Ltda. IEC IEC 60068-2 60115-1 TEST TEST PROCEDURE REQUIREMENTS CLAUSE METHOD 4 4.6.1.1 insulation resistance maximum voltagem 500V (DC) R min.: 10 MΩ ins after 1 minute; metal block method 4.7 voltage proof on 2 x maximum voltage (RMS) insulation during 1 minute; metal block no breakdown or flashover method 4.8.4.2 Temperature At 20/LCT/20ºC and coefficient 20/UCT/20ºC (TC ppm/ºC) 0.22Ω ≤ R ≤ 4.7Ω ≤ ±200ppm/ºC 4.7Ω< R ≤15KΩ ≤ ±100ppm/ºC 4.12 noise “IEC publication 60195” < 0.1µV/V 4.16 21(U) Robustness of terminations : -6 4.16.2 21(Ua1) tensile all samples load 10N; 10s number of failures <10 x 10 -6 4.16.3 21(Ub) Bending half load 5N; 4 x 90º number of failures <10 x 10 number of samples 4.16.4 21(Uc) torsion other half 3 x 360º in opposite directions no damage number of samples ΔR/R max.:± 0.25% + 0.05Ω 4.17 20 (Tb) Solderability (after 8 hours steam or 16 hours Good tinning ( ≥95% covered ); aging) 155ºC; leads immersed 6mm for no damage 2±0.5 s in a solder bath at 235±5ºC 4.18 20(Tb) resistance to thermal shock: 3s; 350 ºC; ΔR/R max.: ± 0.25% + 0.05Ω soldering heat 6 mm from body 4.19 14 (Na) Rapid change of 30 minutes at LCT and no visual damage temperature 30 minutes at UCT; 5 cycles ΔR/R max.: ± 0.25% + 0.05Ω 4.22 6(Fc) Vibration frequency 10 to 500 Hz; displacement 1.5 mm or No damage acceleration 10g; 3 directions; ΔR/R max.: ±0.25% + 0.05Ω total 6 hours (3 x 2 hours) 3 4.23 climatic sequence: R min.: 10 MΩ ins 4.23.3 30 (Db) damp heat (accelerated ) 1 cycle st 4.23.6 30(Db) damp heat o ΔR/R max.: ± 1% + 0.05 Ω 6 days; 55 C; 95 to 98% R.H (accelerated) remaining cycles 4.24.2 3 (Ca) damp heat 56 days; 40 ºC; 90 to 95% RH; R max.: 1000 MΩ ins Loaded with 0.01Pn (steady state) (IEC) (IEC steps: 4 to 100V) ΔR/R max.: ± 1% + 0.05 Ω 4.25.1 Endurance (at 70ºC) 1000 hours; loaded with Pn or ΔR/R max.: ± 1% + 0.05 Ω Vmax; 1.5h on, and 0.5h off 4.26 accidental overload cheese-cloth Nonflammable 4.29 45 (Xa) Component solvent Isopropyl alcohol or H O No visual damage 2 resistance followed by brushing in accordance with “MIL 202 f” nd See 2 amendment to “ÏEC Pulse load See Figs. 5 and 6 60115-1”, NFR25H Revision on 2002/07/11     PHOENIX DO BRASIL LTDA. All rights are reserved. Reproduction whole or in part is Without the written consent of the copyright owner. Page 9 of 9