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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
Stand-up miniature power resistors
FEATURES DESCRIPTION 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. 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.
SMW02/03/05 SMF02/03/05
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".
* High power dissipation in small volume * High pulse load handling capabilities * 2e pitch mounting * Designed in stand-up configuration for stand-up mounting.
APPLICATIONS
* Ballast switching * Power supplies * Shunts.
QUICK REFERENCE DATA DESCRIPTION Resistance range; note 1 Resistance tolerance Maximum permissible body temperature Rated dissipation at Tamb = 70 C Climatic category (IEC 60068) Basic specification Stability after: load, 1000 hours climatic tests short time overload Insulation voltage Note
VALUE SMW02 0.1 to 200 SMF02 220 to 47 k SMW03 0.1 to 560 SMF03 620 to 47 k SMW05 0.1 to 560 SMF05 620 to 47 k
5%; E24 series
300 C 2W 3W 40/200/56 IEC 60115-1 5W
R/R max.: 5% + 0.1 R/R max.: 3% + 0.1 R/R max.: 2% + 0.1 >2000 V
1. Higher values are available on request.
2001 Mar 15
2
BCcomponents
Product specification
Stand-up miniature power resistors
ORDERING INFORMATION Table 1 Ordering code indicating resistor type and packaging
SMW02/03/05 SMF02/03/05
ORDERING CODE 2306 34. ..... TYPE LOOSE IN BOX 500 units SMW02 SMF02 SMW03 SMF03 SMW05 SMF05 0 03... 5 03... 1 03... 6 03... 2 03... 7 03...
Ordering code (12NC)
Table 2
Last digit of 12NC LAST DIGIT 7 8 9 1 2 3
ORDERING EXAMPLE The ordering code of a SMW02 resistor, value 47 , supplied loose in box of 500 units is: 2306 340 03479.
* The resistors have a 12-digit ordering code starting with 2306 34 * The subsequent 3 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 1 to 9.1 10 to 91 100 to 910 1 to 9.1 k 10 to 47 k
2001 Mar 15
3
BCcomponents
Product specification
Stand-up miniature power resistors
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". Limiting values TYPE SMW02 SMF02 SMW03 SMF03 SMW05 SMF05 Note 1. The maximum voltage that may be continuously applied to the resistor element, see "IEC publication 60266".
160
SMW02/03/05 SMF02/03/05
The maximum permissible hot-spot temperature is 300 C, and the minimum breakdown voltage of the encapsulation is 2000 V. PULSE LOADING CAPABILITY Detailed pulse loading information is available on request. Application information LIMITING POWER (W) 2 MOUNTING 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.
LIMITING VOLTAGE(1) (V) V= Pn x R 350 V= Pn x R 350 V= Pn x R 600
3
5
MBG543
DERATING The power that the resistor can dissipate depends on the operating temperature; see Fig.1.
T (K) 120 5W
3W 80 Pmax (%Prated ) 100 2W
MBG629
40
50
0 0 40 80 %Pnom 120
0 40 0 50 70 100 150 200 o Tamb ( C)
Fig.1
Maximum dissipation (Pmax) as a function of the ambient temperature (Tamb).
Fig.2
Solder spot temperature rise (T) as a function of dissipated power.
2001 Mar 15
4
BCcomponents
Product specification
Stand-up miniature power resistors
MECHANICAL DATA Mass per 100 units TYPE SMW02 SMF02 SMW03 SMF03 SMW05 SMF05 Marking 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. For values up to 910 the R is used as a decimal point. For values of 1 k or greater the letter K is used as the decimal point for the k indication. MASS (g) 370 530 640
L W
SMW02/03/05 SMF02/03/05
Outlines
D
H
C d P
CCB358
B1
B2
For dimensions see Table 3.
Fig.3 Outlines.
Table 3
Resistor type and relevant physical dimensions; see Fig.3 W (mm) 11 1 12 1 13 1 D (mm) 7 1 8 1 9 1 C (mm) 0/+1.0 0/+1.0 0/+1.0 H (mm) 20.5 1.5 25.0 1.5 25.5 1.5
TYPE SMW02 SMF02 SMW03 SMF03 SMW05 SMF05
1 - B2 B (mm)
+0.9/-0.3 +1.4/-0.3 +2.3/-0.3
L (mm)
P (mm)
d (mm)
4.5 1.5
5 1
0.8 0.03
2001 Mar 15
5
BCcomponents
Product specification
Stand-up miniature power 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 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 Test procedures and requirements IEC 60068 TEST METHOD
SMW02/03/05 SMF02/03/05
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. 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 4.16 U Ua 4.17 4.18 4.19 4.22 Ta Tb 14 (Na) Fc robustness of resistor body robustness of terminations: tensile all samples solderability load 10 N; 10 s 2 s; 235 C no visible damage R/R max.: 0.5% + 0.05 good tinning; no damage load 200 10 N no visible damage R/R max.: 0.5% + 0.05
resistance to soldering thermal shock: 3 s; 350 C; 2.5 mm from body heat 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 x 2 hours) 4000 10 bumps; 390 m/s2
R/R max.: 0.5% + 0.05
no visible damage R/R max.: 1% + 0.05 no damage R/R max.: 0.5% + 0.05 no damage R/R max.: 0.5% + 0.05
4.20 4.23 4.23.2 4.23.3
Eb
bump climatic sequence:
Ba Db
dry heat damp heat (accelerated) 1st cycle cold low air pressure damp heat (accelerated) remaining cycles
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.: 3% + 0.05
2001 Mar 15
6
BCcomponents
Product specification
Stand-up miniature power resistors
SMW02/03/05 SMF02/03/05
IEC 60115-1 CLAUSE 4.24.2 4.8.4.2
IEC 60068 TEST METHOD 3 (Ca)
TEST
PROCEDURE 56 days; 40 C; 90 to 95% RH; dissipation 0.01 Pn at 20/-40/20 C, 20/200/20 C: SMW: R < 10 SMW: R 10 SMF
REQUIREMENTS
damp heat (steady state) temperature coefficient
no visible damage R/R max.: 3% + 0.1 TC 600 x 10-6/K
-80 x 10-6 TC TC +140 x 10-6/K
TC +250 x 10-6/K
4.13
short time overload
room temperature; dissipation 10 x Pn; 5 s O(voltage not more than 1000 V/25 mm) 1000 hours loaded with 0.9 Pn; 1.5 hours on and 0.5 hours off 1000 hours; 200 C; no load
R/R max.: 2% + 0.1
4.25.1 4.23.2 Ba
endurance (at 70 C) endurance at upper category temperature
no visible damage R/R max.: 5% + 0.1 no visible damage R/R max.: 5% + 0.1
2001 Mar 15
7

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