Resistors
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
AEC-Q200 qualified
All parts are Pb-free and comply with EU Directive 2011/65/EU amended by (EU) 2015/863 (RoHS3)
Electrical Data
0402
Power rating @ 70°C watts
Resistance range ohms
Current Rating (zero ohm jumper) amps
Limiting element voltage volts
TCR ppm/°C
Resistance tolerance
Standard values
Ambient temperature range °C
%
1
50
1
2
150
1
E24, E96
-55 to +155
0.063
0603
0.1
0805
0.125
1206
0.25
1R0 - 10M
2
2.5
200
3.5
4
250
1210
0.33
2010
0.75
2512
1
<10R: 200 10R to 1M0: 100 >1M0: 200
Physical Data
Dimensions (mm) and weight (mg)
L
0402
0603
0805
1206
1210
2010
2512
1.0 ±0.05
1.6 ±0.1
2.0 ±0.1
3.1 ±0.1
3.2 ±0.2
5.0 ±0.2
6.35 ±0.2
W
0.5 ±0.05
0.8 ±0.1
1.25 ±0.1
1.55 ±0.1
2.6 ±0.15
2.5 ±0.15
3.2 ±0.15
0.55 ±0.1
0.6 ±0.25
T
0.35 ±0.05
0.45 ±0.1
0.5 ±0.1
C
0.2 ±0.1
0.3 ±0.2
0.35 ±0.2
0.5 ±0.25
0.5 ±0.2
A
0.2 ±0.1
0.3 ±0.2
0.4 ±0.2
Wt. nom.
0.62
2.04
4.37
8.95
16.0
24.2
39.4
Wrap-around terminations
(3 faces)
A
L
A
W
T
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.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© TT Electronics plc
03.20
Anti Sulphur Chip Resistors
ASC Series
Performance Data
Maximum
Load at rated power: 1000 hours cyclic load @ 70°C ΔR%
Short term overload: Lesser of 6.25 x rated power or 2 x LEV for s ΔR%
Hydrogen Sulphide: 1000 hours 3-5ppm H2S, 50 ±2°C, 92 ±1% RH, no load ΔR%
Derating from rated power at 70°C
Dry heat: 1000 hours at 155°C ΔR%
Damp heat 1000 hours 40°C 90-95% RH ΔR%
Temperature rapid change -55 to 155°C, 5 cycles ΔR%
Resistance to solder heat: 260±5°C for 10s ΔR%
Solderability: 245±5°C for 3s
Solder leaching: 260±5°C for 30s
Board Flex: once for 5s, 2010 & 2512: 2mm, smaller sizes: 3mm ΔR%
Insulation resistance @ 2 x LEV for 60s ohms
2% + 0.1Ω
1% + 0.05Ω
0.5% and no visual defects
Linear to zero at 155°C
1% + 0.05Ω
2% + 0.1Ω
0.5% + 0.05Ω
0.5% + 0.05Ω
≥95% coverage
Leached area ≤10% total, ≤5% individual
1% +0.05Ω
>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: ASC1210-22RFT5
(1210, 22 ohms ±1%, Pb-free)
A
S
1
1
Type
ASC
2
Size
C
1
2
2
3
Value
4
Tolerance
F = ±1%
Blank for
jumper
1
0
-
2
2
3
R
F
4
T
5
5
Packing
T10
0402
10,000 / 7” reel
T5 0603, 0805, 1206, 1210
5000 / 10” reel
T4
2010, 2512
4000 / 7” reel
5
0402 E24 = 3/4 characters
0603 E96 = 3/4 characters
0805
R = ohms
1206
K = kilohms
1210
M = megohms
2010
R000 = Jumper
2512
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.
BI Technologies IRC Welwyn
www.ttelectronics.com/resistors
© TT Electronics plc
03.20
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