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s Super high precision resistors with
a wide resistance range of 100ȍ – 5.11Mȍ
respond to tolerance ±0.01% and T.C.R. ±5×10−6/K
s Extremely stable resistors with less variation ±0.01%/year
s Designated resistances (marking in 4-digit effective figures)
of tolerances ±0.01% – ±0.25% are available
s Marking: black body color and alphanumeric marking
s Products meet EU RoHS requirements
EU
PSEFSJOHJOGPSNBUJPO
/&8
Type
Dimensions inches (mm)
L D d (Nominal) l
SF1/8 .413±.016
(10.5±0.4)
.142±.016
(3.6±0.4) .026
(0.65) 1.50±.118
(38±3)
SF1/4 .630±.016
(16.0±0.4)
.138±.020
(5.5±0.5)
SF1/2 .787±.020
(20.0±0.5)
.264±.020
(6.7±0.5)
.031
(0.8)
L
ød
D
Outer Case
Trimming
Line
Resin for
Sealing
Ceramic
Core
Electrode
Cap
Lead
Wire
Resistive Film
* It becomes a real number when a nominal resistance is 4 or more digits of significant figures.
Resistance
Tolerance
T
:
±0.01%
Q
:
±0.02%
A
:
±0.05%
B
:
±0.1%
C
:
±0.25%
D
:
±0.5%
Product
Code Nominal
Resistance
4 digits*
Power
Rating
1/8: 0.125W
1/4: 0.25W
1/2: 0.5W
C
T.C.R.
(×10-6/K)
Y
:
±5
T
:
±10
Y
Terminal
Surface Material
C
:
SnCu
B1003SF 1/8
Contact us when you have control request for environmental hazardous material other than the substance specified by EU RoHS.
Rated Ambient Temperature: +70°C
Operating Temperature Range: −25°C – +85°C
Rated voltage = ¥Power Rating×Resistance value or Max. working voltage, whichever is lower.
Power T.C.R. Resistance Range Max. Max.
Type Rating (×10-6/K) T:±0.01% Q:±0.02% A:±0.05% B:±0.1% C:±0.25% D:±0.5% Working Overload
E24, E96 E24, E96 E24, E96 E24, E96 E24, E96 E24, E96 Voltage Voltage
SF1/8YC
0.125W Y: ±5 100 - 200k 100 - 200k 100 - 200k 100 - 200k 100 - 200k 100 - 200k 250V 500V
SF1/8TC
T: ±10 100 - 511k 100 - 511k 100 - 511k 100 - 511k
SF1/4YC
0.25W Y: ±5 100 - 511k 100 - 511k 100 - 511k 100 - 511k 100 - 511k 100 - 511k 300V 600V
SF1/4TC
T: ±10 100 - 1M 100 - 1M 100 - 1M 100 - 1M
SF1/2YC
0.5W Y: ±5 100 - 1M 100 - 1M 100 - 1M 100 - 1M 100 - 1M 100 - 1M 350V 700V
SF1/2TC
T: ±10 100 - 3.57M 100 - 5.11M 100 - 5.11M 100 - 5.11M
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 12/10/09
KOA Speer Electronics, Inc s "OLIVAR $RIVE s"RADFORD 0! s53! s s&AX sWWWKOASPEERCOM
SFTJTUPST
4'
JOTVMBUFETVQFSNJOJBUVSFQSFDJTJPO
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Derating Curve
Performance Characteristics
For resistors operated at an ambient temperature of 70°C or above,
a power rating shall be derated in accordance with the above derating curve.
100
80
60
40
20
0
70-25
% RatedPower
Ambient Temperature (°C)
85
-40 -20 020406080 100
Performance Requirements
Test Items $R±% Test Methods
Resistance Within specified tolerance 25°C
SF1/8 Rb200kȍ +25°C/-15°C and +25°C/+65°C, R>200kȍ25°C/+65°C
T.C.R. Within specified T.C.R. SF1/4 Rb511kȍ25°C/-15°C and +25°C/+65°C, R>511kȍ25°C/+65°C
SF1/2 Rb1Mȍ: +25°C/-15°C and +25°C/+65°C, R>1Mȍ25°C/+65°C
Overload (Short Time) 0.05 Rated voltage ×2.5 or Max. overload vol. whichever is lower, for 5s.
0.05 350°C ±10°C, 3s +0.5s/-0s or 260°C ±5°C, 10s±1s
Resistance to Soldering Heat
0.05 -25°C (30min.)/ +85°C (30min.), 5 cycles
Rapid Change 0.2 40°C ±2°C, 90%–95%RH, 1000h
of Temperature
Moisture Resistance 1.5h ON/0.5h OFF cycle
Endurance at 70°C 0.2 70°C ±3°C, 1000h
1.5h ON/0.5h OFF cycle
Variation Per Year 0.01%/Year Normal temperature and humidity for a year
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 1211/09
KOA Speer Electronics, Inc s "OLIVAR $RIVE s"RADFORD 0! s53! s s&AX sWWWKOASPEERCOM
SFTJTUPST
