Wirewound Resistor with Thermal Cut-offs
Wirewound Resistor with Thermal Cut-offs
Type:
ERU5T
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Features
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●
●
●
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Accurate fusing characteristics
Low cost and easy handling
Space saving design
Excellent anti-surge characteristics
RoHS compliant
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Recommended Applications
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Switching regulators, video adapters, safety circuits
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Explanation of Part Numbers
1
2
3
4
5
6
7
8
9
10
Product Code
Fusing
Resistors
Element
Code
Power
5
5 W type
Style
Code
Style
Radial
T
Insertion
Type
Code
B
C
Thermal Cut-offs
Voltage Current Temp.
250 V
2A
134 °C
250 V
2A
145 °C
Resistance
Tolerance
Code
Tol.
J
± 5%
K
±10 %
Standard
Resistance
Tolerance
10
:J
<10 : K
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 as 6.8=6R8
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Ratings
Code
B
C
Power Rating
(W)
1.6
1.8
Current Rating
(A)
2
2
Thermal Cut-off Resistance Range Standard Quantity
(Ω)
(pcs.)
(°C)
134
145
0.18 to 680
0.18 to 680
500
500
Mass (Weight)
[g/pc.]
6.5
6.5
Rated Load (%)
Power Derating Curve
For resistors operated in ambient temperatures above
25 °C, power rating shall be derated in accordance
with the figure on the right.
120
100
80
60
40
5TB
20
90 °C
0
–40 –20
0
20
40
60
80
100 120 140 160
Ambient Temperature (°C)
5TC
25 °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.
01 Aug. 2012
– 73 –
Wirewound Resistor with Thermal Cut-offs
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Dimensions in mm (not to scale)
13±1
9±1
25.5±1.5
f0.8±0.1
+2
f0.6±0.1
5
–1
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Fusing Characteristics
ERU5TBK5R1
1000
(Thermal Cutoff)
Fusing Time (s)
Fusing Time (s)
100
100
+2.0
4.5
–1.0
ERU5TBK6R8
1000
(Thermal Cutoff)
10
10
1
(Wirewound)
1
3 10 30 100 300 1000
Applied Load (W)
1
(Wirewound)
1
3 10 30 100 300 1000
Applied Load (W)
ERU5TBJ100
1000
(Thermal Cutoff)
Fusing Time (s)
ERU5TBJ150
1000
(Thermal Cutoff)
Fusing Time (s)
100
100
10
10
1
(Wirewound)
1
3 10 30 100 300 1000
Applied Load (W)
1
(Wirewound)
1
3 10 30 100 300 1000
Applied Load (W)
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Packaging Methods
Please contact the factory for packaging methods.
Safety Precautions
The following are precautions for individual products. Please also refer to the common precautions for Fixed Resistors
shown on this catalog.
1. When voltage exceeds the rated voltage and/or a current exceeds the rated current and are continuously applied,
the element of Wirewound Resistor with Thermal Cutoffs (hereafter called the resistors) produces excessive heat,
which may not only deteriorate the built-in the Thermal Cutoffs but also blow it.
2. The resistors have a built-in the Thermal Cutoffs. Therefore, use and store them within their respective operating
and storing temperature ranges as specified in individual delivery specifications.
3. Carefully check the inductance effect of the resistors when using them in a high-frequency circuit.
4. 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 under the most adverse conditions before use.
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.
01 Aug. 2012
– 74 –
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