linear positive tempco melf resistor
ML
T
EU
features
•
Free direction for mounting due to cylindrical design
•
Superior in the linearity of resistance change
to temperature
•
Standard resistance sizes
•
Meets or exceeds IEC 60115-1
•
Marking: Gray body color
•
Products with lead-free terminations meet EU RoHS
and China RoHS requirements
dimensions and construction
C
L
D3
thermal
protection
D1 D2
Insulation
Coating
Trimming Resistive
Line
Film
Ceramic
Core
End
Cap
Marking
Type
(Inch Size Code)
L
.138±.008
(3.5±0.2)
.232±.008
(5.9±0.2)
Dimensions
inches
(mm)
C (min.)
D1
D2 (max.) D3 (max.)
.02
(0.5)
.02
(0.5)
.057±.004
(1.45±0.1)
.087±.004
(2.2±0.1)
.061
(1.55)
.094
(2.4)
.004
(0.1)
.006
(0.15)
2B
(1406)
2E
(2309)
ordering information
New Part #
MLT
Type
2B
Size
2B: 1406
2E: 2309
T
Termination
Material
T: Sn
TE
Packaging
TE: 7" embossed plastic
(2B - 3,000 pieces/reel)
(2E - 1,500 pieces/reel)
101
Nominal
Resistance
2 significant
figures + 1
multiplier
J
Tolerance
J: ±5%
3600
T.C.R.
applications and ratings
Part
Designation
T.C.R.
(ppm/°C)
Max.
2000
2800
MLT
3000
3300
3600
3900
±10%
T.C.R.
Tolerance
Resistance
Range
2B
(0.125W)
5.1Ω - 9.1kΩ
––
1KΩ - 4.7kΩ
1KΩ - 4.7kΩ
1KΩ - 5.1kΩ
1KΩ - 3.3kΩ
Resistance
Range
2E
(0.25W)
––
1KΩ - 4.7kΩ
––
1KΩ - 7.5kΩ
1KΩ - 6.8kΩ
1KΩ - 6.2kΩ
J: ±5%
70°C
-40°C to +125°C
Resistance
Tolerance
Rated
Ambient
Temperature
Operating
Temperature
Range
Rated voltage =
√
Power Rating x Resistance value or Max. working voltage, whichever is lower.
For further information on packaging, please refer to Appendix A.
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
1/08/09
192
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
linear positive tempco melf resistor
ML
T
environmental applications
100
80
% Rated Power
60
40
20
0
-40
-20
0
20
40
60
80
100 120
140
125
60
40
20
0
-20
-40
-50 -25
0
25
50
75
100
125
3900
3300
2800
2000
70
Ambient Temperature
(°C)
Temperature Rise
(°C)
% Rated Power
Approximate Expression for Resistance-Temperature Characteristics
T.C.R.
(x10
-6
/K)
3000
3300
3600
3900
C
0
0.934
0.927
0.921
0.915
C
1
0.00258
0.00282
0.00306
0.00330
C
2
2.77
3.17
3.58
4.00
x
x
x
x
10
-6
10
-6
10
-6
10
-6
(Values are not guaranteed but typical) R
T
=R
25
(C
0
+C
1
T+C
2
T
2
)
R
T
: Resistance value at T°C
R
25
: Resistance value at 25°C
T: Ambient temperature (°C)
C
0
, C
1
, C
2
: Constants
Performance Characteristics
Parameter
Resistance
T.C.R.
Overload
Resistance to Solder Heat
Rapid Change of Temperature
Moisture Resistance
Endurance at 70°C
Requirement
∆
R ±(% + 0.05Ω)
Limit
Typical
Within regulated
—
tolerance
Within specified
—
T.C.R.
±1.0%
±0.75%
±1.0%
±0.75%
±1.0%
±0.75%
±3.0%
±2.0%
±3.0%
±2.0%
Test Method
25°C
Room temperature, 50°C up
Rated power x 2.5 or max. overload voltage for 5 seconds, whichever is less
260°C ± 5°C, 10 seconds ± 1 second
-55°C (30 minutes), +125°C (30 minutes), 5 cycles
40°C ± 2°C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.
12/23/08
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
193
thermal
protection
Derating Curve
Temperature Characteristics of Resistance
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