AC04

BCcomponents DATA SHEET AC01/03/04/05/07/10/15/20 Cemented wirewound resistors Product specification Supersedes data of 17th November 1998 File under BCcomponents, BC08 2000 Oct 20 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 FEATURES DESCRIPTION The resistor element is a resistive wire which is wound in a single layer on a ceramic rod. Metal caps are pressed over the ends of the rod. The ends of the resistance wire and the leads are connected to the caps by welding. Tinned copper-clad iron leads with poor heat conductivity are employed permitting the use of relatively short leads to obtain stable mounting without overheating the solder joint. The resistor is coated with a green silicon cement which is not resistant to aggressive fluxes. The coating is non-flammable, will not drip even at high overloads and is resistant to most commonly used cleaning solvents, in accordance with “MIL-STD-202E, method 215” and “IEC 60068-2-45”. • High power dissipation in small volume • High pulse load handling capabilities. APPLICATIONS • Ballast switching • Shunt in small electric motors • Power supplies. QUICK REFERENCE DATA DESCRIPTION Resistance range VALUE AC01 0.1 Ω to 2.4 kΩ = AC03 0.1 Ω to 5.1 kΩ AC04 0.1 Ω to 6.8 kΩ AC05 0.1 Ω to 10 kΩ AC07 0.1 Ω to 15 kΩ AC10 0.68 Ω to 27 kΩ AC15 0.82 Ω to 39 kΩ AC20 1.2 Ω to 56 kΩ Resistance tolerance Maximum permissible body temperature Rated dissipation at Tamb = 40 °C Rated dissipation at Tamb = 70 °C Climatic category (IEC 60 068) Basic specification Stability after: load, 1000 hours climatic tests short time overload 1W 0.9 W 3W 2.5 W 4W 3.5 W 2000 Oct 20 = ±5%; E24 series 350 °C 5W 4.7 W 7W 5.8 W 10 W 8.4 W 15 W 12.5 W 20 W 16 W 40/200/56 IEC 60115-1 ∆R/R max.: ±5% + 0.1 Ω ∆R/R max.: ±1% + 0.05 Ω ∆R/R max.: ±2% + 0.1 Ω 2 BCcomponents Product specification Cemented wirewound resistors ORDERING INFORMATION Table 1 Ordering code indicating resistor type and packaging AC01/03/04/05/07/10/15/20 ORDERING CODE 23.. ... ..... TYPE LOOSE IN BOX STRAIGHT LEADS 100 units AC01 AC03(1) AC04(1) AC05(1) AC07(1) AC10 AC15 AC20 Notes 1. Products with bent leads and loose in box, are available on request. 2. Last 3 digits available on request. Ordering code (12NC) Table 2 Last digit of 12NC LAST DIGIT 7 8 9 1 2 3 ORDERING EXAMPLE The ordering code of an AC01 resistor, value 47 Ω, supplied in ammopack of 1000 units is: 2306 328 33479. Product specifications deviating from the standard values are available on request. RADIAL 2 500 units 06 328 90...(2) BANDOLIER IN AMMOPACK STRAIGHT LEADS 500 units 1 000 units 06 328 33... − − − − − − 22 329 15... 22 329 20... − 22 329 03... 22 329 04... 22 329 05... 22 329 07... 22 329 10... − − − − − − − − − − − − − − − − • The resistors have a 12-digit ordering code starting with 23 • The subsequent 7 digits indicate the resistor type and packaging; see Table 1. • 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 2. RESISTANCE DECADE 0.1 to 0.91 Ω 1 to 9.1 Ω 10 to 91 Ω 100 to 910 Ω 1 to 9.1 kΩ 10 to 56 kΩ 2000 Oct 20 3 BCcomponents Product specification Cemented wirewound resistors FUNCTIONAL DESCRIPTION Product characterization AC01/03/04/05/07/10/15/20 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) 1 3 4 V= Pn × R 5 7 10 15 20 LIMITING POWER (W) Tamb = 40 °C Tamb = 70 °C 0.9 2.5 3.5 4.7 5.8 8.4 12.5 16.0 TYPE AC01 AC03 AC04 AC05 AC07 AC10 AC15 AC20 Note 1. The maximum voltage that may be continuously applied to the resistor element, see “IEC publication 60266”. The maximum permissible hot-spot temperature is 350 °C. DERATING The power that the resistor can dissipate depends on the operating temperature; see Fig.1. 100 Pmax 90 (%) 50 MRA574 0 40 0 40 70 Tamb ( o C) 200 Fig.1 Maximum dissipation (Pmax) as a function of the ambient temperature (Tamb). 2000 Oct 20 4 BCcomponents Product specification Cemented wirewound resistors PULSE L OADING CAPABILITIES AC01/03/04/05/07/10/15/20 How to generate the maximum allowed pulse-load from the graphs composed for wirewound resistors of the AC-types. Single pulse condition; see Fig.3 1. If the applied pulse energy in Joules or Wattseconds is known and also the R-value to be used in the application; take the R-value on the X-axis and go vertically to the curved line. From this point go horizontally to the Y-axis, this point gives the maimum allowed pulse energy in Joules/ohm or Wattsec./ohm. By multiplying this figure with -value in use gives the maximum allowed pulse-energy in Joules or Wattsec. If this figure is higher than the applied pulse-energy the application is allowed. Otherwise take one of the other graphs belonging to AC-types with higher Pn. 2. If, contrary to the information above, the applied peak-voltage and impulse times ti are known. Calculate the pulse-energy (Ep) in Joules or Wattsec. by the use of the following formula: Vp Ep = --------- × ti (Vp = peak voltage; ti = impulse-time) R By dividing this result with the Rn-value of the R in use, gives the value Wattsec./ohm on the Y-axis. Draw a line horizontally to the curved line and at the intersection the vertical line to the X-axis gives the maximum allowed Rn-value to be used in the application. If this Rn-value is higher than the R-value to be used in the application, the application is allowed. If not, take one of the other graphs belonging to AC-types with higher Pn or change the Rn-value to be used. 2 Repetitive pulse condition; see Fig.2 With these graphs we can determine the allowed pulse-energy in Watts depending on the impulse- time ti and the repetition time tp of the pulses. The parameter is the Resistance Value. If the pulse shape is known (impulse-time ti and repetition time tp), draw a line vertically from the X-axis at the mentioned ti to the line of the involved R-value. From the intersection the horizontal line to the Y- axis indicates the maximum allowed pulse-load at a certain tp/ti. If the vertical line from the X-axis crosses the applied tp/ti before reaching the R-line, this tp/ti line gives the maximum allowed pulse-energy at the Y-axis. If the applied pulse-energy is known (in Watts) and the impulse-time ti also, draw a line horizontally from the Y-axis to the crossing with the pulse-line (ti) and find the possible R-value needed in this application. The horizontal tp/ti lines give the maximum allowed pulse-load till they reach the R-line, that point indicates the maximum allowed impulse-time ti at the horizontal axis. 2000 Oct 20 5 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 104 ˆ Pmax (W) 103 tp/ti = 1000 CCB370 tp/ti = 200 102 tp/ti = 50 10 tp/ti = 10 0.1 Ω 1Ω 10 Ω 100 Ω 2 kΩ tp/ti = 2 1 10−1 10−4 AC01 10−3 10−2 10−1 ti (s) 1 Fig.2 ˆ Pulse on a regular basis; maximum permissible peak pulse power ( P max ) as a function of pulse duration (ti). 102 pulse energy (Ws/Ω) 10 CCB371 1 10−1 10−2 10−3 10−4 10−1 1 10 102 103 Rn (Ω) 104 AC01 Fig.3 Pulse capability; Ws as a function of Rn. 2000 Oct 20 6 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 CCB372 1500 ˆ Vmax (V) 1000 500 0 10−6 AC01 10−5 10−4 10−3 10−2 10−1 ti (s) 1 Fig.4 ˆ Pulse on a regular basis; maximum permissible peak pulse voltage ( V max ) as a function of pulse duration (ti). 104 ˆ Pmax (W) 103 tp/ti = 200 tp/ti = 50 tp/ti = 1000 CCB373 102 tp/ti = 10 10 tp/ti = 2 0.1 Ω 1Ω 10 Ω 110 Ω 4.7 kΩ 1 10−1 10−4 AC03 10−3 10−2 10−1 ti (s) 1 Fig.5 ˆ Pulse on a regular basis; maximum permissible peak pulse power ( P max ) as a function of pulse duration (ti). 7 2000 Oct 20 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 103 pulse energy (Ws/Ω) 102 CCB374 10 1 10−1 10−2 10−3 10−4 10−1 1 10 102 103 Rn (Ω) 104 AC03 Fig.6 Pulse capability; Ws as a function of Rn. CCB375 2000 ˆ Vmax (V) 1500 1000 500 0 10−6 AC03 10−5 10−4 10−3 10−2 10−1 ti (s) 1 Fig.7 ˆ Pulse on a regular basis; maximum permissible peak pulse voltage ( V max ) as a function of pulse duration (ti). 8 2000 Oct 20 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 104 ˆ Pmax (W) 103 tp/ti = 1000 CCB376 tp/ti = 200 tp/ti = 50 102 tp/ti = 10 10 0.1 Ω 1Ω 10 Ω 100 Ω 6.8 kΩ 1 tp/ti = 2 10−1 10−4 AC04 10−3 10−2 10−1 ti (s) 1 Fig.8 ˆ Pulse on a regular basis; maximum permissible peak pulse power ( P max ) as a function of pulse duration (ti). 103 pulse energy (Ws/Ω) 102 CCB377 10 1 10−1 10−2 10−3 10−4 10−1 1 10 102 103 Rn (Ω) 104 AC04 Fig.9 Pulse capability; Ws as a function of Rn. 2000 Oct 20 9 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 CCB378 2500 ˆ Vmax (V) 2000 1500 1000 500 0 10−6 AC04 10−5 10−4 10−3 10−2 10−1 ti (s) 1 ˆ Fig.10 Pulse on a regular basis; maximum permissible peak pulse voltage ( V max ) as a function of pulse duration (ti). 104 ˆ Pmax (W) 103 tp/ti = 1000 CCB379 tp/ti = 200 tp/ti = 50 102 tp/ti = 10 0.1 Ω 1.1 Ω 11 Ω 100 Ω 8.2 kΩ 10 tp/ti = 2 1 10−1 10−4 AC05 10−3 10−2 10−1 ti (s) 1 ˆ Fig.11 Pulse on a regular basis; maximum permissible peak pulse power ( P max ) as a function of pulse duration (ti). 2000 Oct 20 10 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 103 pulse energy (Ws/Ω) 102 CCB380 10 1 10−1 10−2 10−3 10−4 10−1 1 10 102 103 Rn (Ω) 104 AC05 Fig.12 Pulse capability; W s as a function of Rn. CCB381 2500 ˆ Vmax (V) 2000 1500 1000 500 0 10−6 AC05 10−5 10−4 10−3 10−2 10−1 ti (s) 1 ˆ Fig.13 Pulse on a regular basis; maximum permissible peak pulse voltage ( V max ) as a function of pulse duration (ti). 2000 Oct 20 11 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 104 tp/ti = 1000 Pmax (W) 103 tp/ti = 200 CCB382 tp/ti = 50 102 tp/ti = 10 0.1 Ω 1Ω 11 Ω 100 Ω 15 kΩ tp/ti = 2 10 1 10−4 AC07 10−3 10−2 10−1 ti (s) 1 ˆ Fig.14 Pulse on a regular basis; maximum permissible peak pulse power ( P max ) as a function of pulse duration (ti). 103 pulse energy (Ws/Ω) 102 CCB383 10 1 10−1 10−2 10−3 10−4 10−1 1 10 102 103 104 Rn (Ω) 105 AC07 Fig.15 Pulse capability; W s as a function of Rn. 2000 Oct 20 12 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 CCB384 5000 ˆ Vmax (V) 4000 3000 2000 1000 0 10−6 AC07 10−5 10−4 10−3 10−2 10−1 ti (s) 1 ˆ Fig.16 Pulse on a regular basis; maximum permissible peak pulse voltage ( V max ) as a function of pulse duration (ti). 105 ˆ Pmax (W) 104 tp/ti = 1000 CCB385 tp/ti = 200 103 tp/ti = 50 102 tp/ti = 10 0.22 Ω 2.2 Ω 33 Ω 240 Ω 15 kΩ tp/ti = 2 10 1 10−4 AC10 10−3 10−2 10−1 ti (s) 1 ˆ Fig.17 Pulse on a regular basis; maximum permissible peak pulse power ( P max ) as a function of pulse duration (ti). 2000 Oct 20 13 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 103 pulse energy (Ws/Ω) 102 CCB386 10 1 10−1 10−2 10−3 10−4 10−1 1 10 102 103 104 Rn (Ω) 105 AC10 Fig.18 Pulse capability; W s as a function of Rn. CCB387 5000 ˆ Vmax (V) 4000 3000 2000 1000 0 10−6 AC10 10−5 10−4 10−3 10−2 10−1 ti (s) 1 ˆ Fig.19 Pulse on a regular basis; maximum permissible peak pulse voltage ( V max ) as a function of pulse duration (ti). 2000 Oct 20 14 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 105 ˆ Pmax (W) 104 tp/ti = 1000 CCB388 tp/ti = 200 103 tp/ti = 50 102 tp/ti = 10 0.33 Ω 4.3 Ω 33 Ω 330 Ω 39 kΩ tp/ti = 2 10 1 10−4 AC15 10−3 10−2 10−1 ti (s) 1 ˆ Fig.20 Pulse on a regular basis; maximum permissible peak pulse power ( P max ) as a function of pulse duration (ti). 103 pulse energy (Ws/Ω) 102 CCB389 10 1 10−1 10−2 10−3 10−4 10−1 1 10 102 103 104 Rn (Ω) 105 AC15 Fig.21 Pulse capability; W s as a function of Rn. 2000 Oct 20 15 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 CCB390 7000 ˆ Vmax (V) 6000 5000 4000 3000 2000 1000 0 10−6 AC15 10−5 10−4 10−3 10−2 10−1 ti (s) 1 ˆ Fig.22 Pulse on a regular basis; maximum permissible peak pulse voltage ( V max ) as a function of pulse duration (ti). 105 ˆ Pmax (W) 104 tp/ti = 200 103 tp/ti = 50 CCB391 tp/ti = 1000 tp/ti = 10 102 tp/ti = 2 10 0.47 Ω 5.1 Ω 47 Ω 470 Ω 56 kΩ 1 10−4 10−3 10−2 10−1 ti (s) 1 AC20 ˆ Fig.23 Pulse on a regular basis; maximum permissible peak pulse power ( P max ) as a function of pulse duration (ti). 2000 Oct 20 16 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 103 pulse energy (Ws/Ω) 102 CCB392 10 1 10−1 10−2 10−3 10−4 10−1 1 10 102 103 104 Rn (Ω) 105 AC20 Fig.24 Pulse capability; W s as a function of Rn. CCB393 10000 ˆ Vmax (V) 8000 6000 4000 2000 0 10−6 AC20 10−5 10−4 10−3 10−2 10−1 ti (s) 1 ˆ Fig.25 Pulse on a regular basis; maximum permissible peak pulse voltage ( V max ) as a function of pulse duration (ti). 2000 Oct 20 17 BCcomponents Product specification Cemented wirewound resistors Application information 350 ∆T at hot spot (K) 300 AC04 AC05 AC03 250 AC07 AC10 AC15 AC01/03/04/05/07/10/15/20 MGB730 AC20 200 150 100 50 AC01 0 0 4 8 12 16 20 P (W) 24 Fig.26 Temperature rise of the resistor body as a function of the dissipation. MRA573 MGB731 25 lead length (mm) 20 ∆T = 10 K 20 K 30 K 25 lead length (mm) 20 70 K ∆T = 40 K 50 K 60 K 15 15 80 K 10 0 0.2 0.4 0.6 0.8 P (W) 1.0 10 0 1 2 P (W) 3 AC01 AC03 Fig.27 Lead length as a function of the dissipation with the temperature rise at the end of the lead (soldering spot) as a parameter. 2000 Oct 20 18 Fig.28 Lead length as a function of the dissipation with the temperature rise at the end of the lead (soldering spot) as a parameter. BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 25 lead length (mm) 20 ∆T = 40 K 50 K MGB732 MGB733 25 60 K lead length (mm) 20 70 K 90 K ∆T = 40 K 50 K 60 K 70 K 80 K 15 80 K 15 100 K 10 0 1 2 3 P (W) 4 10 0 1 2 3 4 P (W) 5 AC04 AC05 Fig.29 Lead length as a function of the dissipation with the temperature rise at the end of the lead (soldering spot) as a parameter. Fig.30 Lead length as a function of the dissipation with the temperature rise at the end of the lead (soldering spot) as a parameter. MGB734 25 lead length (mm) 20 ∆T = 40 K 50 K 60 K 70 K 25 lead length (mm) 20 MGB735 ∆T = 40 K 50 K 60 K 70 K 80 K 80 K 90 K 15 15 10 0 2 4 6 P (W) 8 10 0 5 10 15 P (W) 20 AC07 AC10 Fig.31 Lead length as a function of the dissipation with the temperature rise at the end of the lead (soldering spot) as a parameter. 2000 Oct 20 19 Fig.32 Lead length as a function of the dissipation with the temperature rise at the end of the lead (soldering spot) as a parameter. BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 25 lead length (mm) 20 MGB736 MGB737 25 lead length (mm) 20 ∆T = 40 K 50 K 60 K 70 K ∆T = 40 K 50 K 60 K 70 K 15 15 10 0 5 10 15 P (W) 20 10 0 5 10 15 P (W) 20 AC15 AC20 Fig.33 Lead length as a function of the dissipation with the temperature rise at the end of the lead (soldering spot) as a parameter. MOUNTING Fig.34 Lead length as a function of the dissipation with the temperature rise at the end of the lead (soldering spot) as a parameter. The resistor is suitable for processing on cutting and bending machines. Ensure that the temperature rise of the resistor body does not affect nearby components or materials by conducted or convected heat. Figure 26 shows the hot-spot temperature rise of the resistor body as a function of dissipated power. Figures 27 to 34 show the lead length as a function of dissipated power and temperature rise. 2000 Oct 20 20 BCcomponents Product specification Cemented wirewound resistors MECHANICAL DATA Mass per 100 units TYPE AC01 AC03 AC04 AC05 AC07 AC10 AC15 AC20 Marking The resistor is marked with the nominal resistance value, the tolerance on the resistance and the rated dissipation at Tamb = 40 °C. For values up to 910 Ω, the R is used as the decimal point. For values of 1 kΩ and upwards, the letter K is used as the decimal point for the kΩ indication. For dimensions see Table 3. AC01/03/04/05/07/10/15/20 Outlines Table 3 MASS (g) 55 110 140 220 300 530 840 1090 AC01 AC03 AC04 AC05 AC07 AC10 AC15 AC20 TYPE Resistor type and relevant physical dimensions; see Figs 35 and 36 ∅D MAX. (mm) 4.3 5.5 5.7 7.5 7.5 8 10 10 L MAX. (mm) 10 13 17 17 25 44 51 67 ∅d (mm) b (mm) h (mm) P (mm) S MAX. (mm) ∅B MAX. (mm) − − − − 10e 13e − 1.3 0.8 ±0.03 8 2 1.2 − − − − − − − − − − − − − − − L OD Od MRA571 Fig.35 Type with straight leads. E TY PE P 0.5 OD L Od AN C 2 h0 1 50 OB P MLB677 NT EN M AI S 2 min P4 0.1 b 0 MLB676 Dimensions in mm. For dimensions see Table 3. Available on request for types: AC03, AC04, AC05 and AC07. Fig.36 Type with cropped and formed leads. 2000 Oct 20 21 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 P1 ±0.5 ∅D P1 ±0.5 h+2 Lmax (1) 4.5 ∅d +1 0 b1 S ∅B ±0.07 b2 JW29 P2 ±3 Dimensions in mm. For dimensions see Table 4. ∅0.8 to 1.4. Fig.37 Type with double kink. Table 4 TYPE AC03 AC04 AC05 AC03 AC04 AC05 Resistor type and relevant physical dimensions; see Fig.37 LEAD STYLE double kink large pitch double kink small pitch ∅D (mm) 0.8 ±0.03 L MAX. (mm) 10 b1 (mm) b2 (mm) h (mm) 8 P1 (mm) 25.4 P2 (mm) 25.4 S MAX. (mm) 2 ∅B (mm) 1.0 1.30 1.65 +0.25/-0.20 +0.25/-0.20 1.30 2.15 +0.25/-0.20 +0.25/-0.20 0.8 ±0.03 10 8 22.0 20.0 2 1.0 2000 Oct 20 22 BCcomponents Product specification Cemented wirewound resistors TESTS AND REQUIREMENTS Essentially all tests are carried out in accordance with the schedule of “IEC publications 60115-1 and 60115-4”, category 40/200/56 (rated temperature range −40 °C to +200 °C; 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 60 068, “Recommended basic climatic and mechanical robustness testing procedure for electronic components” and under standard atmospheric conditions according to “IEC 60 068-1”, subclause 5.3. Table 5 Test procedures and requirements IEC 60068 TEST METHOD AC01/03/04/05/07/10/15/20 In Table 5 the tests and requirements are listed with reference to the relevant clauses of “IEC publications 60115-1, 115-4 and 68” ; 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. All soldering tests are performed with mildly activated flux. IEC 60115-1 CLAUSE TEST PROCEDURE REQUIREMENTS Tests in accordance with the schedule of IEC publication 60115-1 4.15 robustness of resistor body load 200 ±10 N load R = 6 mm MBB179 no visible damage ∆R/R max.: ±0.5% + 0.05 Ω 4.16 U Ua Ub Uc robustness of terminations: tensile all samples bending half number of samples load 10 N; 10 s load 5 N 90°, 180°, 90° no visible damage ∆R/R max.: ±0.5% + 0.05 Ω good tinning; no damage torsion other half of 2 × 180° in opposite directions samples solderability 2 s; 235 °C; flux 600 resistance to soldering thermal shock: 3 s; 350 °C; heat 2.5 mm from body rapid change of temperature vibration 30 minutes at −40 °C and 30 minutes at +200 °C; 5 cycles frequency 10 to 500 Hz; displacement 0.75 mm or acceleration 10 g; 3 directions; total 6 hours (3 × 2 hours) 4000 ±10 bumps; 390 m/s2 4.17 4.18 4.19 4.22 Ta Tb 14 (Na) Fc ∆R/R max.: ±0.5% + 0.05 Ω no visible damage ∆R/R max.: ±1% + 0.05 Ω no damage ∆R/R max.: ±0.5% + 0.05 Ω no damage ∆R/R max.: ±0.5% + 0.05 Ω 4.20 Eb bump 2000 Oct 20 23 BCcomponents Product specification Cemented wirewound resistors AC01/03/04/05/07/10/15/20 IEC 60115-1 CLAUSE 4.23 4.23.2 4.23.3 IEC 60068 TEST METHOD Ba Db TEST PROCEDURE REQUIREMENTS climatic sequence: dry heat damp heat (accelerated) 1st cycle cold low air pressure damp heat (accelerated) remaining cycles damp heat (steady state) temperature coefficient 16 hours; 200 °C 24 hours; 55 °C; 95 to 100% RH 4.23.4 4.23.5 4.23.6 Aa M Db 2 hours; −40 °C 1 hour; 8.5 kPa; 15 to 35 °C 5 days; 55 °C; 95 to 100% RH ∆R/R max.: ±1% + 0.05 Ω 4.24.2 4.8.4.2 3 (Ca) 56 days; 40 °C; 90 to 95% RH; dissipation ≤0.01 Pn at 20/−40/20 °C, 20/200/20 °C: R < 10 Ω R ≥ 10 Ω no visible damage ∆R/R max.: ±1% + 0.05 Ω TC ≤ ±600 × 10−6/K −80 × 10−6 ≤ TC TC ≤ +140 × 10−6/K hot-spot temperature less than maximum body temperature temperature rise horizontally mounted, loaded with Pn 4.13 short time overload room temperature; dissipation 10 × Pn; 5 s (voltage not more than 1000 V/25 mm) 1000 hours loaded with Pn; 1.5 hours on and 0.5 hours off 1000 hours loaded with 0.9Pn; 1.5 hours on and 0.5 hours off 1000 hours; 200 °C; no load ∆R/R max.: ±2% + 0.1 Ω 4.25.1 4.25.1 4.23.2 27 (Ba) endurance (at 40 °C) endurance (at 70 °C) endurance at upper category temperature component solvent resistance no visible damage ∆R/R max.: ±5% + 0.1 Ω no visible damage ∆R/R max.: ±5% + 0.1 Ω no visible damage ∆R/R max.: ±5% + 0.1 Ω no visible damage Other tests in accordance with IEC 60115 clauses and IEC 60 068 test method 4.29 4.18 4.17 45 (Xa) 20 (Tb) 20 (Tb) 70% 1.1.2 trichlorotrifluoroethane and 30% isopropyl alcohol; H20 resistance to soldering 10 s; 260 ±5 °C; flux 600 heat solderability (after ageing) tolerance on resistance 16 hours steam or 16 hours at 155 °C; 2 ±0.5 s in solder at 235 ±5 °C; flux 600 applied voltage (±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 ≤ 33 kΩ: 10 V ∆R/R max.: ±0.5% + 0.05 Ω good tinning (≥95% covered); no damage R − Rnom: ±5% max. 4.5 2000 Oct 20 24