FEATURES Excellent anti-surge characteristics Stable characteristics to moisture resistance even in high resistance range. Good replacement for ceramic plate resistors. APPLICATIONS Telecommunication Industrial Medical equipments Laser printer TYPE D 0.8 Dimensions ( mm ) L 1 0.8 L 2 Max. d ( 0.05) 4.0 12 14 0.7 6.0 16 18 0.8 DESCRIPTION A metal glazed film is deposited on a high grade ceramic body. After a helical groove has been cut in the resistive layer, tinned electrolytic copper wire are welded to the end- caps. The resistors are coated with a red non flammable lacquer witch provides electrical, mechanical and climatic protection. QUICK REFERENCE DATA DESCRIPTION VALUE resistance range 1 MΩ to 500 MΩ resistance tolerance 5%, 2%, 1% ( E12, E24,E48 series ) temperature coefficient 250 ppm / rated dissipation at T amb = 70 0.5 W 1W max. working voltage 8000 V 10000 V basic specifications IEC 60 115-1B climatic category (IEC60068) 55 / 155 / 56 Dielectric withstanding voltage 700V RMS during 1 minute V - block method no breakdown - 65 -
ORDERING INFORMATION Ordering code indicating resistor types and packing Table 1 Type Bandolier width Packing Quantity Resistance range Tol. % Ordering code 0.5W 52mm ammo 1000 1 MΩ to 500 MΩ 5 2 1 PPBR 144 13xxx PPBR 144 14xxx PPBR 144 4xxxx Table 2 Type Bandolier width Packing Quantity Resistance range Tol. % Ordering code 1W 64mm ammo 500 1 MΩ to 500 MΩ 5 2 1 PPBR 145 13xxx PPBR 145 14xxx PPBR 145 4xxxx Table 3. Last digit of 12NC Resistance decade Last digit 1 to 9.76 MΩ 5 10 to 97.6 MΩ 6 100 to 976 MΩ 7 Ordering Example The ordering code of a - 0.5W resistor, value 200 MΩ 5%, taped on a bandolier of 1000 units in ammopack is: PPBR 144 13207. Limiting values Table 4 TYPE LIMITING VOLTAGE (V) LIMITING POWER (W) 8000 0.5 10000 1 The maximum permissible hot spot temperature is 155. - 66 -
DERATING The power that the resistor can dissipate depends on the operating temperature : Fig. 1 P max. ( % ) 100 50 0-55 0 50 70 100 155 T amb ( ) Fig. 1 Maximum dissipation ( P max ) in percentage of rated power as a function of the ambient Temperature ( T amb ) Surge resistance characteristics % 0-5 0.5W 1W -10-15 0 2KV 4KV 6KV 8KV 10KV 12KV 14KV Fig. 2 Maximum allowed peak surge voltage in accordance with IEC 60065 chapter 14.1 10 discharges form a 10nF capacitor charged to V max ; 12 discharges / minute - 67 -
Application information 0.5W Fig. 3 Hot spot temperature rise ( T ) as a function of dissipated power Fig.4 Temperature rise ( T ) at the lead end of the lead soldering point as a function of dissipated power at various lead lengths after mounting 1W Fig. 6 Hot spot temperature rise ( T ) as a function of dissipated power Fig.7 Temperature rise ( T ) at the lead end of the lead soldering point as a function of dissipated power at various lead lengths after mounting - 68 -
MECHANICAL DATA Table 5. Mass per 100 units TYPE MASS ( g ) 0.5W 67-1W 148 MARKING The nominal resistance and tolerance are marked on the resistor using four or five colored bands in accordance with IEC publication 60 062 color codes for fixed resistors TEST AND REQUIREMENTS Table 6. Test procedures and requirements TEST robustness of terminations: tensile all samples PROCEDURE φ 0.7 / 0.8 mm : load 10N:10s REQUIREMENTS number of failures < 10 x 10-6 bending half number of samples φ 0.7 / 0.8 mm : load 5N: 4x90 number of failures < 10 x 10-6 torsion other half number samples 3x360 in opposite directions no damage 0.25% 0.05 solderability 2 s ; 235 flux 600 good tinning; no damage soldering heat rapid change of temperature vibration damp heat endurance temperature coefficient dielectric withstanding voltage Thermal shock: 3 s; 360 6mm from body 30 minutes at 55 and 30 minutes at +155 ;5cycles frequency 10 to 500 Hz; displacement 1.5mm or acceleration 10g; 3 directions total 6 hours(3x2 hours) 56 days; 40 ; 90 to 95% RH dissipation 0.01 P n 1000 hours at 70 ; P n or V max 0.5% +0.05 0.5% +0.05 no damage 1% +0.05 1.5% + 0.1 1.5% + 0.1 between 55 and +155 250 ppm / 700V RMS during 1min. V- block method no breakdown - 69 -
TEST AND REQUIREMENTS TEST insulation resistance short time overload overload test PROCEDURE 500V DC during 1 minute ; V block method rated voltage x 2.5 5 s on 45 s off (V V max ) 10 cycles R < 10 MΩ : 5000V RMS during 3sec R 10 MΩ : 8000V RMS during 3sec REQUIREMENTS min. : 10000 MΩ 1% + 0.1 high voltage surge test Switch 10KV 0.01 μf 1 kω no evidence of flash over, mechanical damage, arcing or, insulation breakdown 10% + 0.1 Circuits 10 discharges from a 10 nf capacitor charged to 10KV. ;12 discharges / minute - 70 -