Anti Sulphur Chip Resistors ASC Series · · · · · Special construction resists sulphide growth Withstands sulphur bearing fume environment Tested to ASTM-B809 (“Flowers-of-Sulphur”) Suitable for industrial, automotive and roadside uses RoHS compliant matt tin finish terminations Electrical Data Power rating @ 70ºC watts Resistance range ohms Current Rating (zero ohm jumper) amps Limiting element voltage volts TCR 0402 0603 0805 0.063 0.1 0.125 1210 2010 2512 0.25 0.33 0.75 1 2.5 3.5 1R0 - 10M 1 1 2 50 ppm/ºC Resistance tolerance 1206 2 150 4 200 250 <10R: 200 10R to 1M0: 100 >1M0: 200 % 1 Standard values E24, E96 Ambient temperature range ºC -55 to +155 Physical Data Dimensions (mm) and weight (mg) L W T C A Wt. nom. 0402 1.0 ±0.05 0.5 ±0.05 0.35 ±0.05 0.2 ±0.1 0.2 ±0.1 0.62 0603 1.6 ±0.1 0.8 ±0.1 0.45 ±0.1 0.3 ±0.2 0.3 ±0.2 2.04 0805 2.0 ±0.1 1.25 ±0.1 1206 3.1 ±0.1 1.55 ±0.1 1210 3.2 ±0.2 2.6 ±0.15 2010 5.0 ±0.2 2.5 ±0.15 2512 6.35 ±0.2 3.2 ±0.15 0.5 ±0.1 0.35 ±0.2 0.4 ±0.2 8.95 0.5 ±0.25 0.55 ±0.1 4.37 0.5 ±0.2 0.6 ±0.25 T A L A W 16.0 24.2 39.4 Wrap-around terminations (3 faces) Construction Conductors, resistive element, glass inner protection and epoxy outer protection are applied to a 96% alumina substrate. The chips are supplied with wrap-around terminations suitable for soldering. The terminations have an electroplated nickel barrier and 100% matt tin finish. Marking Sizes larger than 0603 are individually marked with 4 digits. The first three digits are the significant figures and the fourth defines the number of added zeros. Size 0603, E24 values are marked with 3 digits. The first two digits are the significant figures and the third defines the number of added zeros. Size 0603, E96 values are marked with a standard 3 digit EIA96 code. Size 0402 has no marking. The body protection and marking are resistant to all normal cleaning solvents suitable for printed circuits. General Note TT electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT electronics’ own data and is considered accurate at time of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com © TT electronics plc 07. 12 Anti Sulphur Chip Resistors ASC Series Performance Data Maximum Load at rated power: 1000 hours cyclic load @ 70°C ΔR% 2% + 0.1Ω Short term overload: Lesser of 6.25 x rated power or 2 x LEV for s ΔR% 1% + 0.05Ω Hydrogen Sulphide: 1000 hours 3-5ppm H2S, 50 ±2°C, 92 ±1% RH, no load ΔR% 0.5% and no visual defects Derating from rated power at 70°C Linear to zero at 155°C Dry heat: 1000 hours at 155°C ΔR% 1% + 0.05Ω Damp heat 1000 hours 40°C 90-95% RH ΔR% 2% + 0.1Ω Temperature rapid change -55 to 155°C, 5 cycles ΔR% 0.5% + 0.05Ω Resistance to solder heat: 260±5°C for 10s ΔR% 0.5% + 0.05Ω Solderability: 245±5°C for 3s ≥95% coverage Solder leaching: 260±5°C for 30s Leached area ≤10% total, ≤5% individual Board Flex: once for 5s, 2010 & 2512: 2mm, smaller sizes: 3mm ΔR% 1% +0.05Ω Insulation resistance @ 2 x LEV for 60s ohms >10G Packaging ASC resistors are supplied taped and reeled on a 7 or 10” reel as per IEC 286-3. The tape is 12mm wide embossed plastic tape for 2010 and 2512 sizes and 8mm wide paper tape for the smaller sizes. Ordering Procedure Example: ASC1210 at 22 ohms and 1% tolerance on a reel of 5000 pieces - ASC 1210 - 22R F T5 Type Size Value (use IEC62 code) Tolerance (use IEC62 code) F 1% Packing T10 T5 Tape 0402 10,000/reel (7”) 0603, 0805, 1206, 1210 5000/reel (10”) 2010, 2512 4000/reel (7”) T4 Standard Note: For zero ohm jumper, substitute value and tolerance with the code R000 General Note TT electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT electronics’ own data and is considered accurate at time of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com © TT electronics plc 07. 12