insulated super precision
metal film resistor
features
•
Super high precision resistors with
a wide resistance range of 100Ω – 5.11MΩ
respond to tolerance ±0.01% and T.C.R. ±5×10
−6
/K
•
Extremely stable resistors with less variation ±0.01%/year
•
Designated resistances (marking in 4-digit effective figures)
of tolerances ±0.01% – ±0.25% are available
•
Marking: black body color and alphanumeric marking
•
Products meet EU RoHS requirements
EU
dimensions and construction
Trimming
Line
Electrode
Resin for Cap
Sealing
Ceramic
Core
Type
L
Lead
Wire
Dimensions
inches
(mm)
D
.142±.016
(3.6±0.4)
.217±.020
(5.5±0.5)
.264±.020
(6.7±0.5)
d (Nominal)
l
Outer Case
SF1/8
ød
SF1/4
SF1/2
.413±.016
(10.5±0.4)
.630±.016
(16.0±0.4)
.787±.020
(20.0±0.5)
.026
(0.65)
.031
(0.8)
1.50±.118
(38±3)
L
Resistive Film
D
ordering information
SF
Product
Code
1/8
Power
Rating
1/8: 0.125W
1/4: 0.25W
1/2: 0.5W
Y
T.C.R.
(×10
-6
/K)
Y: ±5
T: ±10
C
Terminal
Surface Material
C: SnCu
1003
Nominal
Resistance
4 digits*
B
Resistance
Tolerance
T : ±0.01%
Q: ±0.02%
A: ±0.05%
B: ±0.1%
C: ±0.25%
D: ±0.5%
* It becomes a real number when a nominal resistance is 4 or more digits of significant figures.
Contact us when you have control request for environmental hazardous material other than the substance specified by EU RoHS.
ratings
Type
Power
Rating
T.C.R.
(×10
-6
/K)
Y: ±5
T: ±10
Y: ±5
T: ±10
Y: ±5
T: ±10
Resistance Range (
Ω
)
T:±0.01%
E24, E96*
100 - 200k
100 - 511k
100 - 1M
Q:±0.02%
E24, E96*
100 - 200k
100 - 511k
100 - 1M
A:±0.05%
E24, E96*
100 - 200k
100 - 511k
100 - 511k
100 - 1M
100 - 1M
100 - 3.57M
B:±0.1%
E24, E96*
100 - 200k
100 - 511k
100 - 511k
100 - 1M
100 - 1M
100 - 5.11M
C:±0.25%
E24, E96
100 - 200k
100 - 511k
100 - 511k
100 - 1M
100 - 1M
100 - 5.11M
D:±0.5%
E24, E96
100 - 200k
100 - 511k
100 - 511k
100 - 1M
100 - 1M
100 - 5.11M
Max.
Working
Voltage
250V
300V
350V
Max.
Overload
Voltage
500V
600V
700V
SF1/8YC
0.125W
SF1/8TC
SF1/4YC
0.25W
SF1/4TC
SF1/2YC
0.5W
SF1/2TC
Rated Ambient Temperature: +70°C
Operating Temperature Range: −25°C – +85°C
* Designated resistances ±0.1% – ±0.25% are available
Rated voltage =
√Power
Rating×Resistance value or Max. working voltage, whichever is lower.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
11/29/16
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
187
resistors
SF
SF
insulated super precision
metal film resistor
environmental applications
Derating Curve
100
80
% Rated Power
60
40
20
0
resistors
-40
-20
-25
0
20
40
60
70
80
85
100
Ambient Temperature (°C)
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.
Performance Characteristics
Test Items
Resistance
T.C.R.
Overload (Short Time)
Resistance to Soldering Heat
Moisture Resistance
Endurance at 70°C
Variation Per Year
Performance Requirements
∆R±%
Within specified tolerance
Within specified T.C.R.
0.05
0.05
0.2
0.2
0.01/Year
25°C
SF1/8 R≤200kΩ: +25°C/-15°C and +25°C/+65°C, R>200kΩ:
+25°C/+65°C
SF1/4 R≤511kΩ:
+25°C/-15°C
and +25°C/+65°C, R>511kΩ:
+25°C/+65°C
SF1/2 R≤1MΩ: +25°C/-15°C and +25°C/+65°C, R>1MΩ:
+25°C/+65°C
Rated voltage ×2.5 or Max. overload voltage whichever is lower, for 5s.
350°C ±10°C, 3s +0.5s/-0s or 260°C ±5°C, 10s±1s
-25°C (30min.)/ +85°C (30min.), 5 cycles
40°C ±2°C, 90%–95%RH, 1000h
1.5h ON/0.5h OFF cycle
70°C ±3°C, 1000h
1.5h ON/0.5h OFF cycle
Normal temperature and humidity for a year
Test Methods
Rapid Change of Temperature 0.05
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
5/20/16
188
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
