Metal Film Thermosensitive Chip Resistors
Metal Film Thermosensitive Chip Resistors
0402, 0603, 0805
Type:
ERAW, V, S
●
Suitable for temperature correction circuits
–6
●
Temperature coefficient value 1500 to 3900 10 /°C
●
High performance
Quick response to temperature change
●
Linearity
Excellent linear resistance value change in wide temperature range (–40 °C to +125 °C)
●
High reliability, High density placing
●
Small size and lightweight for PWB size reduction and lightweight products
●
Suitable for both reflow and flow soldering
●
Reference Standards
IEC 60115-8, JIS C 5201-8, EIAJ RC-2145
●
RoHS compliant
■
Features
■
Explanation of Part Numbers
1
2
3
4
5
6
7
8
9
10
11
E
R
A
S
1
5
J
1
0
3
V
Product Code
Metal Film
Chip Resistors
Size, Power Rating
Type: inches Power Rating
W : 0402
0.031 W
V : 0603
0.063 W
S : 0805
0.1 W
Resistance Tolerance
Code
J
Tol.
±
5%
Packaging Methods
Packaging
Type
Code
Punched Carrier Taping
ERAW
X
2 mm pitch, 10,000 pcs.
V
Punched Carrier Taping ERAV
4 mm pitch, 5,000 pcs. ERAS
Temperature Coefficient of Resistance
Code
Type
( 10
–6
/°C)
15
ERAV, ERAS
1500
27
ERAW, ERAV, ERAS
2700
33
ERAW, ERAV, ERAS
3300
39
ERAV, ERAS
3900
Resistance Value
The first two digits are significant figures of
resistance and the third one denotes number of
zeros following. Decimal point is expressed by “R ”.
(ex.) 103 : 10 k
6R8 : 6.8
■
Construction
Protective coating
Electrode (Inner)
■
Dimensions in mm (not to scale)
L
a
W
Alumina substrate
(1)
t
b
Electrode
(Between)
Type
(inches)
ERAW
(0402)
ERAV
(0603)
Thermosensitive
element
ERAS
(0805)
Electrode (Outer)
Dimensions (mm)
L
1.00
1.60
2.00
±0.07
W
0.50
0.80
1.25
±0.05
a
0.15
±0.10
b
0.25
0.30
0.40
±0.07
t
0.35
0.45
0.50
±0.05
Mass (Weight)
[g/1000 pcs.]
0.6
2
4
±0.20
±0.20
0.30
0.40
±0.20
±0.20
±0.10
±0.20
±0.10
±0.25
±0.25
±0.10
1) Marking Temperture Coefficient value :
–6
2 significant figure 100 10 /°C
ERAW type is no marking.
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
00 Oct. 2010
Metal Film Thermosensitive Chip Resistors
■
Ratings
Type
(inched)
Power Rating
at 70 °C
(W)
Standard Specification
T.C.R.
(2)
( 10
–6
/°C)
2700
3300
1500
2700
3300
3900
1500
2700
3300
3900
(1)
Resistance
Range ( )
43 to 1 k
22 to 390
10 to 10 k
43 to 3.3 k
22 to 1.2 k
7.5 to 390
10 to 10 k
43 to 5.1 k
22 to 1.8 k
6.2 to 470
T.C.R.
Tolerance
Resistance
Tolerance
(%)
Standard
Resistance
Values
ERAW
(0402)
0.031
±10 %
±200 10
-6
/ °C
±10 %
±200 10
-6
/ °C
±10 %
±5
E12
ERAV
(0603)
0.063
±5
E12
ERAS
(0805)
0.1
±5
E12
(1) Please ask us when resistors other than standard specification shown in the above table are needed.
(2) T.C.R.=
{
R R-R
75
25
25
1
75–25
10
6
}
–6
10 / ° C R
25
: Resistance value at reference temperature 25 °C
R
75
: Resistance value at temperature 75 °C
Rated Load (%)
Power Derating Curve
For resistors operated in ambient
tem per a tures above 70 °C, power rating
shall be derated in accordance with the
figure on the right.
Category Temperature Range
–40 °C to +125 °C
120
100
80
60
40
20
0
–40
–20
0
20
40
60
70
°C
125
°C
80
100
120
140
Ambient Temperature(°C)
■
Typical Linearity of Resistance Change
60
Resistance Change (%)
50
40
30
20
10
0
–10
–20
–30
–40
–25
0
25
50
75
100
125
3900 10
–6
/°C (ppm/°C)
2700 10
–6
/°C (ppm/°C)
1500 10
–6
/°C (ppm/°C)
Ambient Temperature (°C)
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
00 Sep. 2010
Metal Film Thermosensitive Chip Resistors
■
Packaging Methods (Taping)
●
Standard Quantity
Type
ERAW
ERAV
ERAS
●
Carrier Tape
Punched Carrier
φD
0
P
1
P
2
P
0
E
Kind of Taping
Punched Carrier Taping
Pitch (P
1
)
2 mm
4 mm
Quantity
10000 pcs./reel
5000 pcs./reel
(Unit : mm)
F
B
T
A
P
1
(2 mm pitch)
W
Type
ERAW
ERAV
ERAS
A
0.67
±0.05
B
1.17
±0.05
W
8.00
±0.20
F
3.50
±0.05
E
1.75
±0.10
P
1
2.00
4.00
±0.10
P
2
2.00
±0.05
P
0
4.00
±0.10
φD
0
1.50
+0.10
–0
T
0.52
±0.05
0.70
±0.05
0.84
±0.05
(Unit : mm)
1.10
±0.10
1.65
±0.15
1.19
±0.10
2.50
±0.20
±0.10
●
Taping Reel
Type
ERAW
ERAV
ERAS
φN
φA
180.0
+0
–1.5
φN
60
+1.0
–0
φC
13.0
±0.2
W
1
9.0
+1.0
–0
W
2
11.4
±1.0
φC
W
1
φA
W
2
■
Attention
This product has high temperature coefficient. When measuring resistance, the resistance value can change due
to Joule Heating. Therefore, the measuring current shall be very small in order to prevent the resistance value from
changing. (For example, when the resistor is used at RCWV, temperature of the resistor rise about 15 °C and the
resistance value rise a few percents.) Resistance value may also change due to the ambient temperature. Resistance
value is measured at 25 °C.
■
Recommended Land Pattern
Anexample of a land pattern to Metal Film Thermosensitive Chip Resistors is shown below.
Example
Chip Resistor
Type
(inch size)
ERAW
(0402)
ERAV
(0603)
ERAS
(0805)
Dimensions (mm)
a
0.5 to 0.6
0.7 to 0.9
1.0 to 1.4
b
1.4 to 1.6
2.0 to 2.2
3.2 to 3.8
c
0.4 to 0.6
0.8 to 1.0
0.9 to 1.4
a
b
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
c
00 Sep. 2010
Metal Film Thermosensitive Chip Resistors
■
Recommended Soldering Conditions
Recommendations and precautions are described below.
●
Recommended soldering conditions for reflow
· Reflow soldering shall be performed a maximum of
two times.
· Please contact us for additional information when
used in conditions other than those specified.
· Please measure the temperature of the terminals
and study every kind of solder and printed circuit
board for solderability before actual use.
Peak
Temperature
Preheating
Heating
For soldering (Example : Sn/Pb)
Preheating
Main heating
Peak
Temperature
140 °C to 160 °C
Above 200 °C
235 ± 5 °C
Time
60 s to 120 s
30 s to 40 s
max. 10 s
For lead-free soldering (Example : Sn/Ag/Cu)
Temperature
Time
Preheating
150 °C to 180 °C
60 s to 120 s
Main heating
Above 230 °C
30 s to 40 s
Peak
max. 260 °C
max. 10 s
Time
●
Recommended soldering conditions for flow
For soldering
Temperature
Time
140 °C to 180 °C
60 s to 120 s
245 ± 5 °C
20 s to 30 s
For lead-free soldering
Temperature
Time
150 °C to 180 °C
60 s to 120 s
max. 260 °C
max. 10 s
Preheating
Soldering
Safety Precautions
The following are precautions for individual products. Please also refer to the precautions common to Fixed Resistors
shown on page ER2 of this catalog.
1. Keep the rated power and ambient temperature within the specified derating curve.
* When positioning and mounting Metal Film Thermosensitive Chip Resistors (hereafter called the resistors), make
allowance for the effect of heat generated through close contact between the resistors and neighboring components
and for the temperature rise of adjacent heat-generating components.
2. If a transient load (heavy load in a short time) like a pulse is expected to be applied, check and evaluate the operations
of the resistors when installed in your products before use.
When applying pulses to the resistors, keep the pulse peak within the rated voltage.
3. Do not use halogen-based or other high-activity flux. Otherwise, the residue may impair the resistors' performance
and/or reliability.
4. When soldering with a soldering iron, never touch the resistors' bodies with the tip of the soldering iron. When using a
soldering iron with a high temperature tip, finish soldering as quickly as possible (within three seconds at 350 °C max.).
5. As the amount of applied solder becomes larger, the mechanical stress applied to the resistors increases, causing
problems such as cracks and faulty characteristics. Avoid applying an excessive amount of solder.
6. When the resistors' protective coatings are chipped, flawed, or removed, the characteristics of the resistors may be
impaired. Take special care not to apply mechanical shock during automatic mounting or cause damage during
handling of the boards with the resistors mounted.
7. Do not apply shock to the resistors or pinch them with a hard tool (e.g. pliers and tweezers). Otherwise, the resistors'
protective coatings and bodies may be chipped, affecting their performance.
8. Avoid excessive bending of printed circuit boards in order to protect the resistors from abnormal stress.
9. Do not immerse the resistors in solvent for a long time. Before using solvent, carefully check the effects of immersion.
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
00 Sep. 2010
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