BCcomponents DATA SHEET SMW02/03/05 SMF02/03/05 Stand-up miniature power resistors Product specification Supersedes data of 7th August 2000 File under BCcomponents, BC08 2001 Mar 15 BCcomponents Product specification SMW02/03/05 SMF02/03/05 Stand-up miniature power resistors FEATURES DESCRIPTION • High power dissipation in small volume SMW: 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. • High pulse load handling capabilities • 2e pitch mounting • Designed in stand-up configuration for stand-up mounting. APPLICATIONS • Ballast switching • Power supplies • Shunts. SMW/SMF: 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 body and lead ends are housed within a rectangular ceramic case which is non-flammable, will not melt 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”. SMF: The resistor element is a metal film resistor consisting of a metal layer deposited over a high grade ceramic rod. The resistive film is adjusted to final value by means of a helical groove. The leads are connected to the caps by welding. QUICK REFERENCE DATA DESCRIPTION Resistance range; note 1 VALUE SMW02 SMF02 SMW03 SMF03 SMW05 SMF05 0.1 to 200 Ω 220 Ω to 47 kΩ 0.1 to 560 Ω 620 Ω to 47 kΩ 0.1 to 560 Ω 620 Ω to 47 kΩ ±5%; E24 series Resistance tolerance 300 °C Maximum permissible body temperature Rated dissipation at Tamb = 70 °C 2W 3W Climatic category (IEC 60068) 40/200/56 Basic specification IEC 60115-1 Stability after: load, 1000 hours ∆R/R max.: ±5% + 0.1 Ω climatic tests ∆R/R max.: ±3% + 0.1 Ω short time overload ∆R/R max.: ±2% + 0.1 Ω >2000 V Insulation voltage Note 1. Higher values are available on request. 2001 Mar 15 2 5W BCcomponents Product specification SMW02/03/05 SMF02/03/05 Stand-up miniature power resistors ORDERING INFORMATION Table 1 Ordering code indicating resistor type and packaging ORDERING CODE 2306 34. ..... TYPE LOOSE IN BOX 500 units SMW02 0 03... SMF02 5 03... SMW03 1 03... SMF03 6 03... SMW05 2 03... SMF05 7 03... Ordering code (12NC) Table 2 Last digit of 12NC • The resistors have a 12-digit ordering code starting with 2306 34 RESISTANCE DECADE LAST DIGIT • The subsequent 3 digits indicate the resistor type and packaging; see Table 1. 0.1 to 0.91 Ω 7 1 to 9.1 Ω 8 • The remaining 3 digits indicate the resistance value: 10 to 91 Ω 9 100 to 910 Ω 1 – The first 2 digits indicate the resistance value. 1 to 9.1 kΩ 2 10 to 47 kΩ 3 – The last digit indicates the resistance decade in accordance with Table 2. 2001 Mar 15 3 ORDERING EXAMPLE The ordering code of a SMW02 resistor, value 47 Ω, supplied loose in box of 500 units is: 2306 340 03479. BCcomponents Product specification SMW02/03/05 SMF02/03/05 Stand-up miniature power resistors The maximum permissible hot-spot temperature is 300 °C, and the minimum breakdown voltage of the encapsulation is 2000 V. FUNCTIONAL DESCRIPTION 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”. PULSE LOADING CAPABILITY Limiting values Application information LIMITING VOLTAGE(1) (V) TYPE SMW02 V = SMF02 Pn × R Detailed pulse loading information is available on request. MOUNTING LIMITING POWER (W) The resistors must be mounted in such a way that no stress is exerted on the leads and that thermal expansion is possible over the temperature range. Ensure that the temperature rise of the resistor body by conducted or convected heat, does not affect nearby components or materials. The temperature rise at the soldering point of the leads must not reach the melting point of the solder. The temperature rise at the soldering point as a function of dissipated power is shown in Fig.2. 2 350 SMW03 V = SMF03 Pn × R 3 350 SMW05 V = SMF05 Pn × R 5 600 Note 1. The maximum voltage that may be continuously applied to the resistor element, see “IEC publication 60266”. MBG543 160 DERATING ∆T (K) The power that the resistor can dissipate depends on the operating temperature; see Fig.1. 120 5W 3W 80 2W Pmax (%Prated ) MBG629 100 40 50 0 0 40 80 %Pnom 120 0 40 Fig.1 0 50 70 100 150 200 o Tamb ( C) Fig.2 Maximum dissipation (Pmax) as a function of the ambient temperature (Tamb). 2001 Mar 15 4 Solder spot temperature rise (∆T) as a function of dissipated power. BCcomponents Product specification SMW02/03/05 SMF02/03/05 Stand-up miniature power resistors MECHANICAL DATA Outlines Mass per 100 units MASS (g) TYPE SMW02 W D 370 SMF02 SMW03 530 SMF03 SMW05 H 640 SMF05 L Marking C The resistor is marked with the resistor type designation, the production week, nominal resistance value, the tolerance on the resistance and the rated dissipation at Tamb = 70 °C. ∅d P For values up to 910 Ω the R is used as a decimal point. For values of 1 kΩ or greater the letter K is used as the decimal point for the kΩ indication. Table 3 B1 CCB358 B2 For dimensions see Table 3. Fig.3 Outlines. Resistor type and relevant physical dimensions; see Fig.3 TYPE SMW02 SMF02 SMW03 SMF03 SMW05 SMF05 2001 Mar 15 W (mm) D (mm) C (mm) H (mm) ∉B1 − B2∉ (mm) 11 ±1 7 ±1 0/+1.0 20.5 ±1.5 +0.9/−0.3 12 ±1 8 ±1 0/+1.0 25.0 ±1.5 +1.4/−0.3 13 ±1 9 ±1 0/+1.0 25.5 ±1.5 +2.3/−0.3 5 L (mm) P (mm) ∅d (mm) 4.5 ±1.5 5 ±1 0.8 ±0.03 BCcomponents Product specification Stand-up miniature power resistors TESTS AND REQUIREMENTS In Table 4 the tests and requirements are listed with reference to the relevant clauses of “IEC publications 60115-1, 60115-4 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. 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. All soldering tests are performed with mildly activated flux. The tests are carried out in accordance with IEC publication 60068, “Recommended basic climatic and mechanical robustness testing procedure for electronic components” and under standard atmospheric conditions according to “IEC 60068-1”, subclause 5.3. Table 4 SMW02/03/05 SMF02/03/05 Test procedures and requirements IEC 60115-1 CLAUSE IEC 60068 TEST METHOD TEST PROCEDURE REQUIREMENTS Tests in accordance with the schedule of IEC publication 60115-1 4.15 4.16 robustness of resistor body U Ua load 200 ±10 N no visible damage ∆R/R max.: ±0.5% + 0.05 Ω load 10 N; 10 s no visible damage ∆R/R max.: ±0.5% + 0.05 Ω 2 s; 235 °C good tinning; no damage robustness of terminations: tensile all samples 4.17 Ta solderability 4.18 Tb resistance to soldering thermal shock: 3 s; 350 °C; 2.5 mm from body heat 4.19 14 (Na) rapid change of temperature 30 minutes at −40 °C and 30 minutes at +200 °C; 5 cycles no visible damage ∆R/R max.: ±1% + 0.05 Ω 4.22 Fc vibration frequency 10 to 500 Hz; displacement 0.75 mm or acceleration 10 g; 3 directions; total 6 hours (3 × 2 hours) no damage ∆R/R max.: ±0.5% + 0.05 Ω 4.20 Eb bump 4000 ±10 bumps; 390 m/s2 no damage ∆R/R max.: ±0.5% + 0.05 Ω 4.23 climatic sequence: 4.23.2 Ba dry heat 16 hours; 200 °C 4.23.3 Db damp heat (accelerated) 1st cycle 24 hours; 55 °C; 95 to 100% RH 2 hours; −40 °C 4.23.4 Aa cold 4.23.5 M low air pressure 1 hour; 8.5 kPa; 15 to 35 °C 4.23.6 Db damp heat (accelerated) remaining cycles 5 days; 55 °C; 95 to 100% RH 2001 Mar 15 ∆R/R max.: ±0.5% + 0.05 Ω 6 ∆R/R max.: ±3% + 0.05 Ω BCcomponents Product specification Stand-up miniature power resistors IEC 60115-1 CLAUSE 4.24.2 IEC 60068 TEST METHOD 3 (Ca) 4.8.4.2 TEST PROCEDURE damp heat (steady state) 56 days; 40 °C; 90 to 95% RH; dissipation ≤0.01 Pn temperature coefficient at 20/−40/20 °C, 20/200/20 °C: SMW02/03/05 SMF02/03/05 REQUIREMENTS no visible damage ∆R/R max.: ±3% + 0.1 Ω SMW: R < 10 Ω TC ≤ ±600 × 10−6/K SMW: R ≥ 10 Ω −80 × 10−6 ≤ TC TC ≤ +140 × 10−6/K SMF TC ≤ +250 × 10−6/K 4.13 short time overload room temperature; dissipation 10 × Pn; 5 s O(voltage not more than 1000 V/25 mm) ∆R/R max.: ±2% + 0.1 Ω 4.25.1 endurance (at 70 °C) 1000 hours loaded with 0.9 Pn; 1.5 hours on and 0.5 hours off no visible damage ∆R/R max.: ±5% + 0.1 Ω endurance at upper category temperature 1000 hours; 200 °C; no load no visible damage ∆R/R max.: ±5% + 0.1 Ω 4.23.2 2001 Mar 15 Ba 7