AS Series
F e At u r e S
Anti-surge Thick Film Chip Resistors
• Small size and light weight
• Suitable for both wave and reflow soldering
• Can withstand high surge
• Reduction of assembly costs
S e r i e S S p e c i F i c At i o n S
Type
AS08 (0805)
AS12 (1206)
AS25 (2512)
Power
Rating
at 70°C
0.33W
0.5W
1.5W
Max
Working
Voltage
150V
200V
500V
Max
Overload
Voltage
300V
400V
500V
Dielectric
Withstanding
Voltage
500V
500V
500V
Resistance
Range
1Ω~10MΩ
1Ω~10MΩ
1Ω~20MΩ
chArActeriSticS
Std. Oper. Temp.
-55°C ~ +155°C
Standard Values
E-24 values
Construction
Thick film
Tolerance
±5% standard; ±10%
and ±20% available
Test
ΔR
Test Methods (JIS C 5201-1 )
Natural ΔR/°C
R2-R1
x 10
6
(PPM/°C)
R1(t2-t1)
R1: at room temp. (T1)
R2: at room temp. plus 100°C (T2)
Test pattern: room temp. (T1), room
temp. +100°C(T2)
Permanent ΔR after the application of a
potential of 2.5 times RCWV for 5 sec.
Twist of Test Board: Y/X = 3/90 mm for
60 sec.
260°C±3°C for 10 ±1 sec.
See graph on next page.
Temporary ΔR after 240 hr. at 40 ±2°C
and 90-95% relative humidity
ΔR after 1,000 hr. (1.5 hr. "on", 0.5 hr.
"off" ) at RCWV at 40 ±2°C and 90-95%
relative humidity
ΔR change after 1,000 hr. operat-
ing at RCWV, with duty cycle of (1.5
hours"on", 0.5 hour"off") at 70°C ±2°C
ambient
Wave Solder: 245°C ±3°C for 2-3 sec.
ΔR after 5 cycles:
-55°C ±3°C 30 min.
Room temp. 10-15 min.
+155°C ±2°C 30 min.
4 Room temp. 10-15 min.
Temperature
1Ω-10Ω: ≤ ±400PPM/°C
Coefficient
(±200 PPM can be provid-
ed on a case to case basis)
11Ω-10MΩ: ≤ ±100PPM/°C
Derating
100
Percent Rated Power
80
60
40
20
0
-55
0
50 70 100
Ambient Temperature,
°C
155
Short Time
±(1.0% + 0.1Ω) max.
Overload
Terminal
±(1.0% + 0.05Ω) max.
Bending
Soldering Heat
±(1.0% + 0.05Ω) max.
Single Pulse
±(1.0% + 0.1Ω) max.
Humidity
±(3.0% + 0.1Ω) max.
Load Life in
±(3.0% + 0.1Ω) max.
Humidity
Load Life
±(3.0% + 0.1Ω) max.
Reflow
300
250
230° ~ 245°/250°
Soldering
20 ±10sec.
Preheating
150° ~ 180°
90 ±30sec.
Temperature °C
200
150
100
50
0
Cooling
Solderability
Min. 95% coverage
Temperature
±(1.0% + 0.05Ω) max.
Cycling
Time
Clamped in the trough of a 90°C metal-
Dielectric
No evidence of flashover,
withstanding
mechanical damage, arcing lic v-block at specified AC potential
60-70 sec.
voltage
or insulation breakdown
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AS Series
Pulse Curve
Anti-surge Thick Film Chip Resistors
chArActeriSticS
Lightning Surge
10,000
Single
Voltage (V)
1,000
AS25
AS12
AS08
AS25
AS12
AS08
100
1.2/50µs Lightning Surge
1
10
100
1K
10K
100K
1M
10
Continuous (100K )
Resistance (Ω)
AS25
AS12
AS08
DimenSionS
(mm)
Series
AS08
AS12
AS25
L
2.00 ±0.15
3.10 ±0.15
6.35 ±0.10
W
H
a
b
125 +0.15/-0.10 0.55 ±0.10 0.40 ±0.20 0.40 ±0.20
155 +0.15/-0.10 0.55 ±0.10 0.45 ±0.20 0.45 ±0.20
3.10 ±0.15
0.55 ±0.10 0.60 ±0.25 0.50 ±0.20
b
2
±.5
13
±.5
T ±.1
1.5
+0.1/-0
b
4.0
±.1
2.0
±.05
a
a
Tape and Reel
Paper
1.75
±.1
178
±2
8.0
±.2
60
±1
3.5
±0.05
B ±.2
A ±.2
21
±.5
Series
AS12
AS08
Packaging
Paper
Paper
Qty./reel
5,000 pcs.
5,000 pcs.
A
2.00
1.65
B
3.60
2.40
W ±1
T
0.81
1.0
0.81
W
10
10
Embossed
1.0 ±.1
1.75
±.1
1.5
+0.1/-0
4.0
±.1
2.0
±.05
8.0
±.2
3.5
±0.05
1.5
+0.1/-0
AS25
Embossed
4,000 pcs.
3.50
6.70
13.8
B ±.2
A ±.2
o r D e r i n G i n F o r m At i o n
RoHS
compliant
Standard Part Numbers
0805
AS08J1R00ET
AS08J10R0ET
AS08J1000ET
AS08J1001ET
AS08J1002ET
AS08J1003ET
AS08J1004ET
1206
AS12J1R00ET
AS12J10R0ET
AS12J1000ET
AS12J1001ET
AS12J1002ET
AS12J1003ET
AS12J1004ET
2512
AS25J1R00ET
AS25J10R0ET
AS25J1000ET
AS25J1001ET
AS25J1002ET
AS25J1003ET
AS25J1004ET
AS08J1004ET
Series
AS08= 0805
AS12= 1206
AS25= 2512
Tolerance
J = 5%
standard
for E24
values
Ohms
First 3 digits are
significant; 4th digit
is multiplier. Values
below 100 ohms use
"R" as a decimal
holder.
examples:
1001 = 1000 ohms
1502 = 15000 ohms
TCR
T= tape and
reel: 0805 and
1206 paper
tape; 2512
embossed tape.
1-866-9-OHMITE • Int’l 1-847-258-0300 • Fax 1-847-574-7522 • www.ohmite.com • info@ohmite.com
7
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